Technical Energy Audit New Mexico State University Professional Services Contract #201302796-A

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Prepared for New Mexico State University Las Cruces, New Mexico

Technical Energy

Audit

Professional Services Contract #201302796-A

January 31, 2014

Technical Energy Audit New Mexico State University Professional Services Contract #201302796-A

January 31, 2014

Prepared for New Mexico State University Las Cruces, New Mexico

Presented by:

Michael Boyer Mailing Address: Account Executive 60 East Rio Salado Parkway, Suite 1001 Ameresco, Inc. Tempe, Arizona 85281 P: 801.425.3421 Local Office: E: [email protected] 6100 Foulois Road, Building 737 Hill Air Force Base, Utah 04856

Technical Energy Audit

Executive Summary

Ameresco, Inc. (Ameresco) is pleased to submit this Technical Energy Audit (TEA) to New Mexico State University (NMSU). Based on our site visits, work, and observations throughout the Las Cruces campus, this TEA provides recommended energy conservation measures (ECMs) that would reduce energy and operational costs at 45 campus buildings and campus wide facilities.

Ameresco developed this TEA based on NMSU’s Professional Services Contract #201302796-A and Ameresco’s site visits, workshops, and utility analysis and energy calculations.

This TEA is intended to provide an overall representation of the potential for energy and operational savings at NMSU. Based on the data collected from site surveys, facility interviews, and other means, Ameresco identified several ECMs that could help NMSU reduce overall operational costs.

ES.1 Energy Conservation Measures

ECMs found to have the best financial performance or are high priorities for NMSU include:

• ECM 1: Interior Lighting • ECM 2: Exterior Lighting • ECM 3: Exterior Pole Mounted Lighting • ECM 6: Retrocommissioning • ECM 7: Variable Air Volume Retrofit • ECM 10: Economizer Upgrade or Repair • ECM 12: Chilled Water Pump Bypass • ECM 26: Satellite Plant Energy Savings • ECM 28: MyEnergyPro™-OpsPRO • ECM 29: MyEnergyPro™-DashPRO • ECM 30: MyEnergyPro™-Optimization Model

ES.2 Savings

Total projected savings from implementing these ECMs are $1,278,725. The total cost for constructing the project is $15,865,000. This cost includes third party consultant fees, detailed audit fees,

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New Mexico State University Executive Summary January 31, 2014 Page i Technical Energy Audit

performance and payment bonds, and implementation costs, but does not include potential utility rebates. Simple payback time for the project is 12.3 years. Installation of all 11 ECMs would:

• Reduce electricity consumption by 14,286,249 kilowatt-hours (kWh) every year.

• Reduce peak demand by 1,710 kW.

• Reduce natural gas consumption by 9,674 Decatherms each year.

• Lessen the production of 24.9 million pounds of carbon dioxide (CO2), 13.7 thousand pounds of sulfur dioxide and 23 thousand pounds of nitrous oxides.

Table ES.0. Energy Conservation Measures Selected for Implementation – Firm Pricing

Savings ($) Total Implementation Natural Total Cost Simple Energy Conservation Measure Electric Gas O&M Project ($) Payback ECM 1: Interior Lighting $472,812 $4,119 $59,075 $536,006 $4,703,529 7.5

ECM 2: Exterior Lighting $10,143 $0 $4,123 $14,266 $294,934 19.0

ECM 3: Exterior Pole Mounted Lighting $4,795 $0 $888 $5,683 $1,336,816 233.2

ECM 6: Retrocommissioning $69,532 $71,698 $0 $141,230 $2,201,811 14.7

ECM 7: Variable Air Volume Retrofit $187,561 -$15,008 $0 $172,553 $3,469,299 18.2

ECM 10: Economizer Upgrade or Repair $96,642 -$284 $0 $96,358 $488,609 3.2

ECM 12: Chilled Water Pump Bypass $80,006 -$971 $0 $79,035 $1,429,554 16.5

ECM 26: Satellite Plant Energy Savings $367,551 $1,002 $0 $368,553 $0 0.0

ECM 28: MyEnergyPro™-OpsPRO $0 $0 $0 $0 $55,194

ECM 29: MyEnergyPro™-DashPRO $0 $0 $0 $0 $29,318

ECM 30: MyEnergyPro™-Optimization $0 $0 $0 $0 $122,834 Model Total $1,289,042 $60,556 $64,086 $1,413,684 $14,131,898 9.0

Note: The simple payback shown in the above table includes an estimated utility rebate of $1,459,216.

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Executive Summary New Mexico State University Page ii January 31, 2014 Technical Energy Audit

ES.3 Environmental Benefits

In terms of emission reductions, the environmental benefits associated with this energy conservation project are equivalent to…

annual greenhouse gas emissions from removing 2,100 passenger cars from the road,

CO2 emissions from 1,130,007 gallons of gasoline consumed annually,

Saving enough energy to power 503 typical American homes for 1 year,

258,453 tree seedlings grown for 10 years,

greenhouse gas emissions avoided by not landfilling 3,775 tons of waste

The project will deliver the additional strategic benefits to NMSU:

• Provide sustained energy savings for the term of the agreement.

• Enhance reliability and quality of the facility operations.

• Provide long-term, non-obsolescent assets that continue to deliver cash flow and reliability benefits beyond the debt service term.

• Access the benefit of the utility cash incentive program – currently estimated to be $1,459,216.

ES.4 Conclusion

By implementing a performance contract based on this TEA, NMSU will reduce energy consumption, address existing operation and maintenance (O&M) issues and upgrade aging infrastructure.

Upon completion of the construction project, Ameresco will monitor the performance of the ECMs for the duration of the contract – or for a reduced term, if so desired by NMSU. The scope of work for the on-going M&V services is described in Section F of this report.

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New Mexico State University Executive Summary January 31, 2014 Page iii Technical Energy Audit

Ameresco recognizes that NMSU facilities are staffed with some exceptional O&M personnel. This being the case, we do not recommend that Ameresco assume full O&M of the equipment installed as a part of any of the measures. Instead, Ameresco will provide extensive training during the first year and DVD recordings of the training that can be used for additional training during the project term.

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Executive Summary New Mexico State University Page iv January 31, 2014 1/29/2014 - 4:10 PM Project Proforma (January 28, 2014) - 13 Year Project Performance Term + Construction New Mexico State University

Initial Project Costs: Financial Assumptions Detailed Energy Audit $ 659,459 Implementation Costs $ 14,131,898 Term of Project (years) 13.0 yrs New Mexico Gross Receipts Tax (6.375%) $ 942,949 Term of Financing (years) 13.0 yrs Total Initial Project Costs $ 15,734,306 Estimated Financing Rate 3.02%

Cost of Issuance $ 115,000 Payments per Year (frequency) 12 Underwriters Discount $ 12,000 Discount Rate 3.02% Additional Proceeds $ 3,694 Energy Escalation rate (annual) 2.97% O&M Savings Escalation rate (annual) 3.00% Net Project Costs $ 15,865,000 M&V Cost Escalation Rate (annual) 3.00% Construction Period Interest $ - O&M Cost Escalation Rate (annual) 3.00% Total Amount Financed $ 15,865,000 Project Simple Payback 12.30

Proforma FY-15 Year Initial Values Constructon FY-16 FY-17 FY-18 FY-19 FY-20 FY-21 FY-22 FY-23 FY-24 FY-25

1 Projected Annual Energy Cost Savings$ 981,045 $ - $ 1,010,133 $ 1,040,083 $ 1,070,922 $ 1,102,675 $ 1,135,369 $ 1,169,033 $ 1,203,695 $ 1,239,384 $ 1,276,132 $ 1,313,969 2 Projected Annual Cost Savings from the Satellite Plant$ 368,553 $ 245,702 $ 379,481 $ 390,732 $ 402,317 $ 414,246 $ 426,529 $ 439,175 $ 452,197 $ 465,604 $ 479,409 $ 493,624 3 Guaranteed Energy Cost Savings$ 882,941 $ - $ 909,120 $ 936,075 $ 963,830 $ 992,407 $ 1,021,832 $ 1,052,129 $ 1,083,325 $ 1,115,446 $ 1,148,519 $ 1,182,572 4 Guaranteed Energy Savings from the Satellite Plant$ 331,698 $ - $ 341,533 $ 351,659 $ 362,086 $ 372,822 $ 383,876 $ 395,258 $ 406,977 $ 419,044 $ 431,468 $ 444,262 5 O&M Savings $ 64,086 $ - $ 66,009 $ 67,989 $ 70,029 $ 72,129 $ 74,293 $ 76,522 $ 78,818 $ 81,182 $ 83,618 $ 86,126 6 Utility Rebates (Note 4) $ - $ 1,459,216 7 Total Project Savings $ 1,278,725 $ 245,702 $ 2,775,878 $ 1,355,723 $ 1,395,945 $ 1,437,358 $ 1,480,001 $ 1,523,909 $ 1,569,120 $ 1,615,672 $ 1,663,605 $ 1,712,960

8 Payments for Financing Equipment $ 480,454 $ 2,599,123 $ 1,175,099 $ 1,212,147 $ 1,252,383 $ 1,290,656 $ 1,326,966 $ 1,371,313 $ 1,408,395 $ 1,453,363 $ 1,500,915 9 Energy Savings Guarantee Insurance$ 60,732 $ - $ 62,533 $ 64,387 $ 66,296 $ 68,261 $ 70,285 $ 72,369 $ 74,515 $ 76,725 $ 78,999 $ 81,342 10 Payments for Measurement and Verification Services$ 59,642 $ - $ 61,431 $ 63,274 $ 65,172 $ 67,127 $ 69,141 $ 71,215 $ 73,351 $ 75,552 $ 77,819 $ 80,154 11 MyEnergyPro™ - OpsPRO Annual Service$ 2,900 $ - $ 2,987 $ 3,077 $ 3,169 $ 3,264 $ 3,362 $ 3,463 $ 3,567 $ 3,674 $ 3,784 $ 3,898 12 Total Payments $ 123,274 $ 480,454 $ 2,726,074 $ 1,305,837 $ 1,346,784 $ 1,391,035 $ 1,433,444 $ 1,474,013 $ 1,522,746 $ 1,564,346 $ 1,613,965 $ 1,666,309

13 Net Annual Benefit From Guaranteed Savings$ (480,454) $ 49,804 $ 49,886 $ 49,161 $ 46,323 $ 46,557 $ 49,896 $ 46,374 $ 51,326 $ 49,640 $ 46,651 14 Net Annual Benefit From Projected Savings $ (234,752) $ 188,764 $ 192,967 $ 196,484 $ 198,015 $ 202,747 $ 210,717 $ 211,963 $ 221,825 $ 225,194 $ 227,410 15 Cumulative Cash Flow from Guaranteed Savings $ 151,424 $ (480,454) $ (430,650) $ (380,765) $ (331,604) $ (285,281) $ (238,723) $ (188,827) $ (142,454) $ (91,128) $ (41,488) $ 5,163 16 Cumulative Cash Flow from Projected Savings $ 2,562,670 $ (234,752) $ (45,988) $ 146,980 $ 343,463 $ 541,479 $ 744,225 $ 954,942 $ 1,166,905 $ 1,388,730 $ 1,613,924 $ 1,841,334 17 Net Present Value of Cash Flow from Guaranteed Savings FY 15 to FY 28$ 34,821 18 Net Present Value of Cash Flow from Projected Savings FY 15 to FY 28$ 1,970,013

Proforma Year Line # FY-26 FY-27 FY-28 Totals

1 Projected Annual Energy Cost Savings$ 1,352,928 $ 1,393,043 $ 1,434,346 $ 15,741,712 2 Projected Annual Cost Savings from the Satellite Plant$ 508,260 $ 523,330 $ 538,846 $ 6,159,452 3 Guaranteed Energy Cost Savings$ 1,217,635 $ 1,253,738 $ 1,290,912 $ 14,167,540 4 Guaranteed Energy Savings from the Satellite Plant$ 457,434 $ 470,997 $ 484,962 $ 5,322,378 5 O&M Savings $ 88,710 $ 91,371 $ 94,112 $ 1,030,908 6 Utility Rebates (Note 4) $ - $ - $ - $ 1,459,216 7 Total Project Savings $ 1,763,779 $ 1,816,106 $ 1,869,986 $ 22,225,744

8 Payments for Financing Equipment$ 1,545,900 $ 1,593,318 $ 1,638,018 $ 19,848,050 9 Energy Savings Guarantee Insurance$ 83,753 $ 86,237 $ 88,794 $ 974,496 10 Payments for Measurement and Verification Services$ 82,559 $ 85,036 $ 87,587 $ 959,418 11 MyEnergyPro™ - OpsPRO Annual Service$ 4,015 $ 4,135 $ 4,259 $ 46,654 12 Total Payments $ 1,716,227 $ 1,768,726 $ 1,818,658 $ 21,828,618

13 Net Annual Benefit From Guaranteed Savings$ 47,552 $ 47,380 $ 51,328 $ 151,424 14 Net Annual Benefit From Projected Savings$ 233,671 $ 239,018 $ 248,647 $ 2,562,670 15 Cumulative Cash Flow from Guaranteed Savings $ 52,715 $ 100,096 $ 151,424 16 Cumulative Cash Flow from Projected Savings $ 2,075,005 $ 2,314,023 $ 2,562,670

Notes: 1 This cash flow reflects an estimated financing rate of 3.02%. The actual rate will increase or decrease based on market conditions and customer credit rating at the time of bond issuance. 2 Revenues are based on current utility rate structures and usage information provided for purposes of this project. 3 The performance and payment bonds apply only to the installation portion of the contract and do not apply in any way to energy savings guarantees, payments or maintenance provisions, except that the performance bond shall guarantee that the installation will be free of defective materials and workmanship for a period of 12 months following completion and acceptance of the work 4 The amount of the utility rebate(s) are not guaranteed. The final rebate amount will be determined by the utility company. 5 NMSU will make an interest payment of $480,454 to the lender during FY 15 prior to the completion of construction and commencement of the performance period. 6 Energy Cost Savings will begin to accrue during the construction period as the retrofits are installed.

NMSU Finance Matrix - ver38 - Proforma 1 Page 1 of 1 Technical Energy Audit

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Executive Summary New Mexico State University Page vi January 31, 2014 Technical Energy Audit

Table of Contents

Executive Summary Table of Contents A.0 Introduction ...... 1 B.0 Facility Descriptions ...... 17 C.0 Base Year Energy Use ...... 201 D.0 Energy Conservation Measures ...... 205 E.0 Project Costing ...... 269 F.0 Measurement and Verification ...... 273 G.0 Commissioning ...... 309 H.0 Acceptance Procedures ...... 335 I.0 Training Plan ...... 339 J.0 Operations and Maintenance Plan ...... 343 K.0 Appendices ...... Included in a Separate File (on CD) K.1 Lighting Room by Analysis K.2 Lighting Data Logger Results K.3 Exterior Pole Mounted Lighting Scope K.4 Lighting Cutsheets K.5 Executable eQUEST Models and Weather Files K.6 eQUEST Calibration and Savings Sheets K.7 Subcontractor Scopes of Work and RFIs K.8 NIST Table S‐4 Energy Escalation Rates K.9 Plug Load Survey K.10 Standards of Comfort

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A.0 Introduction

This Technical Energy Audit (TEA) is intended to provide an overall representation of the potential for energy and maintenance savings at NMSU. Based on the data collected from site surveys, facility interviews and by other means, Ameresco has identified several energy conservation measures (ECMs) that will help NMSU reduce overall operation costs through a combination of retrofits and equipment replacements.

A.1 Project Overview

NMSU directed Ameresco to include 11 ECMs in the project. Of these ECMs, NMSU is currently implementing the ECM 26, Satellite Plant Energy Savings. The remaining ECMs include retrofitting the lighting systems, HVAC systems, energy management control systems (EMCS) and other systems at the Las Cruces campus. Implementing these ECMs would provide the following benefits for the university:

• Decrease peak electricity demand by 1,710 kilowatts (kW) per year. • Decrease electricity consumption by 14.3 million kilowatt-hours (kWh) per year. • Decrease natural gas consumption by 9,674 decatherms per year. • Decrease operations and maintenance (O&M) costs by $64,086 per year. This savings comes from retrofitting existing lamps with new lamps with longer life and by reducing the total number of lamps in operation throughout NMSU. • Improve the learning environment by providing higher quality lighting and better temperature control.

The total project savings resulting from implementing the measures is estimated to be $1,278,725 per year. This savings includes $331,698 in projected savings from the satellite plant which will be used for the project. This savings is included in the savings guarantee.

In terms of pollution reduction, the project will avoid the production of 24,881,565 pounds of carbon dioxide per year1. This reduction in carbon dioxide generation is equivalent to removing 2,100 cars from the road2, or powering 503 homes each year3. In addition, implementing these ECMs will deliver strategic benefits to NMSU such as:

1 Calculated using 1.542 pounds per kilowatt hours of carbon dioxide reduction from electricity generation in Texas based on the data provided by U.S. Department of Energy. 2 One car produces the equivalent of 5.3 tons of carbon dioxide per year (Source: U.S. Environmental Protection Agency). 3 The average home uses 1,000 kilowatt hours per month.

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New Mexico State University A.0 Introduction January 31, 2014 Page 1

Technical Energy Audit

• Providing interior lighting efficiency upgrades that will demonstrate NMSU’s commitment to improving the learning environment for students and staff. • Providing exterior lighting efficiency upgrades that will improve pathway and walking lighting and aesthetics. • Addressing the efficiency and modernization needs for air handling units (AHUs) and other assets. • Expanding on the capabilities of the campus wide Niagara control systems. • Providing long-term, non-obsolescent assets that continue to deliver cash flow and reliability benefits beyond term for debt service. • Accessing the benefit of the utility cash incentive program, which is currently estimated to be around $1,459,216.

Ameresco will produce construction drawings stamped by a licensed New Mexico Professional Engineer (PE) for specific mechanical measures. ECMs that are non-mechanical systems or maintenance-related items such as retro-commissioning will not require stamped construction drawings.

Ameresco will perform measurement and verification (M&V) services upon completion of the construction and each year for the 15-year performance period.

Detailed descriptions of the proposed measures are provided in the Section A.3 Technical Summary of this report.

Ameresco will provide training for NMSU personnel during commissioning and at the end of construction. The training sessions will be recorded on DVD for future use.

A.2 Financial Overview

Summary of the costs and savings for the project with this financing structure is:

• Total construction cost of $15,865,000. • Total savings of $1,413,684 in the first year of performance period. • The total guaranteed energy savings are $1,278,725 in Year 1. The pro-forma for the project is provided on the following page.

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A.0 Introduction New Mexico State University Page 2 January 31, 2014

1/29/2014 - 4:10 PM Project Proforma (January 28, 2014) - 13 Year Project Performance Term + Construction New Mexico State University

Proforma FY-15 Year Initial Values Constructon FY-16 FY-17 FY-18 FY-19 FY-20 FY-21 FY-22 FY-23 FY-24 FY-25

Proforma Year Line # FY-26 FY-27 FY-28 Totals

NMSU Finance Matrix - ver38 - Proforma 1 Page 1 of 1 Technical Energy Audit

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A.3 Technical Summary

This subsection summarizes the ECMs selected for the project.

ECM 1: Interior Lighting

This ECM involves retrofit of existing lighting systems at specified campus buildings. The retrofit includes replacing existing lamps and ballasts with more efficient lamps and ballasts, replacing old fixtures with more efficient fixtures, replacing HID (mercury vapor, metal halide, or high pressure sodium) fixtures with LED or fluorescent lamps, replacing incandescent exit signs with light emitting diode (LED) signs and many others.

This ECM includes the installation of lighting controls at the specified campus buildings. The retrofit includes installing occupancy sensors in appropriate areas. The appropriate areas contain several controllable fixtures, which have intermittent occupancy and where a safety hazard will not be created if the sensor inadvertently turns the lights off.

Ameresco identified all vending machines throughout the specified NMSU facilities during the energy audit. Currently these machines operate all the time regardless of occupancy. However, during unoccupied periods, operations of these machines could be scaled back to save energy and electricity cost.

These strategies will reduce overall electricity consumption of the lighting system. In addition, this ECM will reduce maintenance costs due to longer lamp life and reduced number of lamps for replacement. The retrofit will also reduce the amount of heat generated by lighting and thus lower the mechanical cooling requirements. The heat reduction, however, results in a heating penalty during the heating season. The heating penalty is mitigated by the use of the combustion turbine which more than offsets the increase in heating load.

ECM 2: Exterior Lighting

Exterior building lighting consists of various types of technologies and fixtures throughout the campus. Lighting technologies include HID sources (metal halide and high pressure sodium), CFL, incandescent, and linear fluorescent. Fixture types found are recessed cans, surface mount box style, wall packs, floods, and post top.

LED is the most innovative technology commercially available in terms of delivered lumens per watt and rated life. Where feasible, LED technology will be installed. By going from HID, CFL, or incandescent technology to LED, the rated life of the lamps will increase from 20,000 (HID), 10,000 (CFL) or 1,000 (incandescent) run hours to 25,000, 50,000, or more. This will alleviate many maintenance concerns as well as provide the latest, most efficient technology. Factors considered for the exterior building lighting include:

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• Dark sky compliant • Age and condition of existing fixtures • Existing lighting technology type • Photocell or timer controlled • Color of existing fixtures

ECM 3: Exterior Pole Mounted Lighting

This section refers to specific exterior pole lighting on campus – Cobra Heads, Shoe Boxes, and Post Tops. This includes parking lots, site lighting, and street lighting. New LED fixtures are proposed for specified exterior pole lighting applications. NMSU has already begun the switch to LED fixtures on poles, as several parking lot areas have been identified as existing LED fixtures. In addition to replacing fixture for fixture, NMSU has identified existing poles around campus that need to be replaced; these will be referred to as Thin Walled Poles. These Thin Walled Poles were identified within the audit and a specific number of pole replacements are included in the project scope.

ECM 6: Retrocommissioning

Retro-commissioning (RCx) is a systematic process to identify the effectiveness of the facility’s Direct Digital Control (DDC) system. It is primarily focused on building HVAC systems with an emphasis on identifying operational or energy related issues. It provides a way to inspect, test, and verify that each system is working as per its design intent to deliver proper operation and energy efficiency.

ECM 7: Variable Air Volume Retrofit

For each of the buildings identified in the ECM Matrix, Ameresco proposes to convert specific air handling systems from constant volume to variable air volume (VAV) systems. This measure would retrofit the existing mixing boxes and the air handling systems supplying these facilities. The optimization of the air distribution systems and the control strategy will result in lower thermal and fan electric energy consumption and power demand. Minimization of mixing cold and warm airstreams and supplying only the needed quantity of air to the spaces served to achieve occupant comfort during off design load periods. Coincident modifications will be necessary at the main air systems (air handling units / AHUs) to throttle the air supply as the modified boxes respond to load changes. Strategically developed mixing box internal retrofit “kits” will be utilized to avoid taking the existing boxes down out of the ceiling and/or the necessity to modify ductwork.

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ECM 10: Economizer Upgrade or Repair

For buildings identified in the ECM Matrix, Ameresco proposes to inspect, and where necessary, refurbish, repair, upgrade, or replace the economizer dampers and the controls that operate them. A high number of hours of occurrence at which free cooling is available make mechanical electric cooling energy savings possible for NMSU. Most air handling systems have 100% outdoor air capability and are equipped with return fans to make utilization of outdoor air for cooling needs possible. The outdoor air, return air, and relief airstreams are typically equipped with control dampers and associated controls to throttle and mix these airstreams to provide this cooling to the spaces served. Unlike manual dampers, these control dampers are designed to control the airstream quantities in a fairly precise manner. They typically have somewhat linear characteristics so as to control the airflow accurately. These dampers include shafts riding in bushings or bearings and modulate open and close numerous times over their useful life as the cooling load and outdoor air condition change. This ECM includes restoring these dampers (and the controls associated with them) to industry standards. Most of the damper actuators were originally the pneumatic type. Many have already been converted to electronic/DDC (Direct Digital Control).

ECM 12: Chilled Water Pump Bypass

For each building identified in the ECM Matrix, Ameresco proposes to install chilled water bypass valves on tertiary (building) chilled water pumps served by the central plant. These systems will include requisite isolation valves, strainers, and other hydronic specialty equipment and devices. Any existing chilled water coils currently equipped with three-way control valves (or wild coils) will be converted to two-way DDC actuated control valves (wherever possible). The existing chilled water pumps shall remain in place and operational (remotely) so that upon failure of central plant flow, the existing chilled water pumps will automatically energize and provide chilled water flow to the building. The recently enhanced flow configuration of the central plants makes variable flow primary strategy possible out at the chilled water coils served by the plant. (Static) water pressure sensors located at major chilled water coils and fan coil circuits will make reset strategies possible for the central plant. Electrical pump energy is reduced both at the building level and at the plant level.

ECM 26: Satellite Plant Energy Savings

NMSU recently added the new Satellite Utility Plant (SUP) to meet existing and future chilled water capacity for the Las Cruces Campus. The plant includes a new 2,500-ton duplex chiller and a new glycol ice production chiller rated at 877 tons. The new plant also has a new 250-HP variable primary chilled water distribution pumps together with 100-HP condenser water and glycol pumps. The ice storage system includes 72 each Calmac 1500 ice storage tanks coupled with a plate and frame heat exchanger. The condenser water loop has a three cell counter flow cooling tower with three 50-HP variable speed fans.

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The new Satellite Utility Plant displaces existing CUP chillers with the new duplex chiller during off-peak periods and increases the chilled water thermal storage capacity for use during summer on-peak periods. Modifications to the primary chilled water piping allow for the bypass of the existing tertiary pumps (ECM-12).

ECM 28, 29, and 30: MyEnergyPRO

In response to NMSU’s desire for a real-time energy information system, Ameresco proposes using the existing Tridium Building Automation System (BAS) and installing MyEnergyPro™ (MEP) to develop and customize a web application that will meet the unique requirements of the University. MyEnergyPro™ is an internet-based suite of energy monitoring and reporting tools. Clients of MyEnergyPro™ can view monthly, real-time, and historical energy information and cost savings, as well as, combined heat and power on their own unique and dynamic MyEnergyPro™ site displayed in an intuitive and graphical representation. MEP monitors at the whole building level, as well as, down to the equipment level for more precise, holistic reporting. Clients can use MyEnergyPro™ to monitor, manage, analyze, invoice and report. MEP can be used as a tool for engaging community awareness and also can incorporate educational components and behavioral changes. This information driven approach can empower clients to turn energy cost into an asset. With consistent design architecture, MyEnergyPro™ websites are graphically rich, easy to navigate; custom tailored to the unique requirements of each project, and designed to include multiple sites located over a large geographical area. MyEnergyPro™ is a full turnkey solution providing not only all of the software, but all hardware and installation needed for data acquisition. The different websites that will be customized as part of this project are DashRPO, OpsPRO, UtilityPRO, and Optimization Model (OM).

A.4 Measures Considered, but Not Recommended

Throughout the TEA, Ameresco evaluated a range of measures that have the potential for energy savings. However, many of the ECMs are not practical or economically feasible for implementation at NMSU. Other measures were found to be potentially feasible; however, existing project constraints prevented their implementation at this time. Some of these measures are candidates for future ECM opportunities. As such, Ameresco does not recommend implementing them at this time, but recommends future consideration of these measures.

The following is a list of measures that were initially considered, but were not developed further and are not recommended (NR) at this time.

NR-1: DDC Retrofit

NMSU currently has a direct digital controlled (DDC) energy management system installed at the Las Cruces campus and many buildings are connected to the Niagara building automation system (BAS).

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Variations exist as to how far the DDC has already been implemented. In some cases, the DDC extends all the way out to space temperature control by DDC components. In other cases, DDC exists only at a local scope and is not integrated into the central BAS (Niagara) at all.

Generally, DDC has been extended out to CHW valve control in almost all cases. Several systems are on local pneumatic control of the space conditions via terminal boxes, unit ventilators, or fan coil units originally installed with pneumatic control devices. Many of the main relief, outdoor, and return dampers on the big double duct and multi-zone units have been fitted with DDC damper actuators. Some of the variable speed drives are fitted with DDC static pressure device controls.

The DDC retrofit project could improve energy and comfort performance by extending out to non-DDC buildings and by extending out to space control level on existing DDC buildings. Additional control strategies can be implemented to further optimize energy performance and enhance comfort. VAV, economizer, and variable pumping are discussed separately. Global adjustments become possible by extending DDC out to the space control level. Reset of cold duct/deck based on zone with the highest demand for cooling with return air override strategies become possible. Optimization of building CHW delta T via more sophisticated algorithms can be implemented. Main damper control and true economizer can use additional free cooling from outdoor air. Demand ventilation at the air-handling unit (AHU) level can be incorporated into existing and new strategies.

NR-2: Fume Hood Controls

The design of HVAC systems for laboratories require large quantities of make-up and exhaust air for the fume hoods and must be maintained at precise pressures relative to the adjacent spaces. These requirements are essential to maintain the safety of the building occupants. This mandate for safety coupled with the desire to save energy presents a great challenge.

Traditionally, labs were designed as constant volume systems, often with a separate exhaust fan and make-up air source for each hood. These systems are not only expensive to install, but also extremely expensive to operate due to high energy usage; a typical fume hood can move 800 to 1,600 cubic feet of conditioned air in one minute.

The proposed laboratory and fume hood control system will include the installation of venturi air valve on the supply, general exhaust, and fume hood exhaust. Fume hoods would also be retrofitted with sash position monitors and occupancy sensors. Ventilation air flow and temperature control would be managed by new laboratory controls. Fume hood users would benefit with the assurance that the fume hood face velocity is maintained at the required feet per minute when they are at the hood. This fume hood monitor also provides audible and visual indication of safe operation as recommend by safe laboratory standards.

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NR-3: HVAC Upgrade or Replacement

At the Las Cruces campus, the central plants provide the major source of mechanical cooling and heating for the various campus buildings; however, there is other ancillary equipment distributed throughout the campus. The audit of NMSU indicates that there exists a variety of mechanical equipment of varying ages, condition, and efficiencies. This includes packaged gas-electric rooftop units air-to-air heat pumps, as well as split systems and other equipment.

Opportunities for new high efficiency HVAC equipment specifically (DX) packaged HVAC units, as well as split system units exist. Many of the units observed are over 20 years old, are very inefficient, and have reached the end of their useful life. Some of these existing units are estimated to be operating at a 9or lower Seasonal Energy Efficiency Rating (SEER).

The range of equipment efficiencies available for new HVAC equipment improves each year. Depending on the age and operational efficiency of the existing HVAC equipment, there is an opportunity to upgrade components, or in some cases the full unit. Newer high efficiency packaged equipment lowers operating cost, while the upgraded designs allow for quieter operation, better humidity control for occupant comfort and variable operating conditions.

Gas fired furnaces at the old units typically have combustion efficiency of 80 percent or lower. Newer generation forced air units have condensing type furnaces with combustion efficiency of 90 percent or higher and generally have multi-stage heating control. These units also come in two-speed or continuously-variable speed blower fans for reduced electricity consumption. Older generation DX coils with either packaged or split condensing units have efficiency of between 10 to 12 SEER. From 2006, all newer split air conditioning systems are required to have minimum efficiency of 13 SEER. The most efficient split systems can have efficiency of up to 20 SEER.

These upgrades would meet the NMSU objective of lowering costs by reducing energy consumption and maintenance costs. This would also create a more comfortable learning environment by properly conditioning the occupied spaces for faculty and students.

A representative list of the buildings at the NMSU campuses where HVAC upgrades or replacements could be performed include the Young Hall, William B. Conroy Honors Center, Dan W Williams Hall, Neale Hall, Pan American Center, Speech Building, and OFS shops.

NR-4: Heat Recovery

During the site visits it was observed that there are instances where heat recovery could be implemented and/or exists and can be repaired and/or controlled. Some examples of these systems where heat recovery could be implemented are 100 percent outdoor air systems such as gymnasiums, locker rooms, labs, and other similar areas.

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Many buildings at NMSU are equipped with heat recovery. Examples of these buildings include Skeen Hall, the 1995 Chemistry Building, and Gardiner Hall.

The objective of heat recovery systems is to reduce the energy consumption and cost of operating a building by transferring heat between two fluids such as exhaust and outside air. In many cases, the proper applications of heat recovery systems can result in reduced energy consumption and lower energy bills, while adding little or no additional cost to building maintenance or operations.

A representative list of the buildings at the NMSU campuses where heat recovery could be performed include the 1968 Chemistry Building, William B. Conroy Honors Center, Monagle Residence Hall, Natatorium, Foster Hall, Memorial Stadium and Locker Room Field House, and the Fulton Athletic Center.

NR-5: Premium Efficiency Motors

This measure would replace existing standard efficiency electric motors with premium-efficiency motors as defined in NEMA Standards. Pump and air-handing motors would be subject to this project. The scope includes all work associated with the complete retrofit of the existing motor, including electrical, mechanical, and all other work required to return the retrofitted equipment to an efficiently powered system. Motors associated with variable frequency drives would be replaced with inverter rated motors.

Premium efficiency motors draw less power and will provide lower operating costs. In addition, the proposed motor upgrade has the added benefit of lower maintenance requirements. Premium efficiency motors last longer because they run cooler and are built with higher quality materials. The replacements will be performed on selected waterside and airside equipment.

NR-6: Variable Flow Pumping

Recent improvements in the central plant chilled water distribution system combined with the proposed chilled water bypass measure (ECM-12) have now made this measure unnecessary. The pump bypass measure includes the use of two-way chilled water control valves and the installation of new pressure sensors to allow the use of primary variable flow chilled water pumping.

NR-7: Domestic Hot Water

This measure would replace existing domestic water heaters with new high efficiency units as defined in ASHRAE/IESNA 90.1. This scope of work would include plumbing, electrical, and all other work necessary to return the retrofitted plumbing system to a fully functional hot-water supply system. The high efficiency water heaters are manufactured with an improved insulation jacket to reduce heat loss and reduce operating costs.

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This ECM would propose to add a control device to each water heater. This timer would be set to reduce cycle time during unoccupied hours. This control function on each water heater would reduce energy waste. Standard timers are available to control the hours of operation for these devices.

NR-8: Mechanical Insulation

Ameresco has found several places where insulation is missing from mechanical piping and ductwork.

This measure would install and/or replace missing insulation with new insulation where it is found to be absent. The new insulation would reduce the heat transfer between systems and the environment. Reducing the heat transfer would decrease the energy costs accordingly.

This measure would install insulation where found missing or damaged around the NMSU campuses. The proposed insulation will be a fibrous glass type with a vinyl backing and having a K-factor of at least 0.03 at 75°F mean temperature. Insulation thickness will be as appropriate. Typical manufacturers include Owens-Corning, Certain-Teed, Manville, or Knauf Controls, equipment, valves, and nameplates would not be covered would remain accessible.

A representative, but not complete, list of the buildings at the NMSU campuses where mechanical insulation could be done includes Goddard Hall, William B. Conroy Honors Center, Dan W. Williams Hall, Hadley Hall, Branson Library, Music Building, and Natatorium.

NR-9: Building Envelope

Removal and replacement of worn or missing weather stripping/seals and installation of new door sweeps, seals, and weather stripping for exterior doors and windows improves the occupant comfort in buildings and reduces the load and energy usage of the HVAC equipment. Energy is saved by reducing the amount of infiltration of outside air, which increases HVAC load or the loss of interior conditioned air.

This measure would replace damaged seals on doors and windows in selected buildings with new seals. Several exterior doors were observed with missing or severely deteriorated weather stripping and door sweeps, leaving large gaps for the loss of interior conditioned air. Some windows also require the application of weather stripping.

The measure also recommends the application of low emissivity (Low E) film on the windows and doors with glass panels. A low emissivity window keeps the heat from escaping through the glass when the winter outside temperatures is cold, while keeping the heat from entering during the summer months.

These weatherization measures would apply to Dan W. Williams Hall and the Natatorium, for example.

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Engineering Complex I has a large abandoned solar panel area that forms the outside surface of the return air plenum. The old solar panels were used to heat air passing over the heated surfaces. It was noted that the panels are causing a large increase in the return air temperature when the building is in cooling mode. This unique envelope improvement would remove the solar panels and add a new insulated and reflective roof surface.

NR-10: Trash Compaction

NMSU has numerous receptacles for employees and students to deposit trash on their respective campuses. These receptacles are in a variety of locations surrounding the majority of the buildings.

Currently, it is estimated that the NMSU Campuses spend nearly a quarter of a million dollars per year on waste disposal. NMSU has over 100 dumpsters and carts (much in the student housing area), several 20-yard roll-off boxes, and two compactors that are both currently rented. It is believed that in conjunction with the NMSU’s Sustainability Department and their efforts in recycling, these costs can be reduced.

The scope of this project includes the installation of NMSU owned and operated trash compactors in order to eliminate the renting of trash compactors reduce the number of scheduled pick-ups from the local disposal company. NMSU’s disposal companies charge by the frequency and/or volume of trash that they pick-up in a given week. Sometimes this is a scheduled event that will occur whether the trash bin is full or not, or the disposal company may pick-up the trash when called to do so.

Ameresco would work closely with NMSU and the refuse company to find safe, convenient, and aesthetic locations for the new trash compactors.

Savings are generated by the reduction in the number of times per month and the quantity of trash bins that have to be picked up.

NR-11: Computer Power Management

Throughout the NMSU campuses, Ameresco identified a number of computers. Individually, these computers use a very small amount of energy when they remain in the full power-on state or when idle. Even though low-power processors and more efficient LCD monitors are being produced each year, computer networks are the fastest-growing consumers of plug load energy in most organizations.

The objective of this ECM is to reduce the energy use associated with computers during unused periods. Computer power management (CPM) systems can be used to control NMSU’s computers (PCs) to shut down if they are left on after hours. In many environments, IT and system administrators have disabled the power management features of the PCs to deal with the instability of early-generation power management technologies or because of the inherent differences in power management capabilities among different PC platforms. It has often been easier to disable ALL power management functions than it has been to sort out operation system capabilities, user types, and hardware inconsistencies.

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To solve this problem, CPM’s have implemented a group structure that allows client PCs to be sorted into power management groups by platforms, hardware, user types, or all three. Groups can be either simple, such as one large group that includes every PC in a facility; or they can be complex, with a multitude of different groups for different operating systems, users, or hardware configurations.

IT and system administrators also know that many of their PCs have, in the past, not behaved well in certain low-power states such as hibernate or suspend. Now they can isolate these machines in a group that uses neither hibernate nor suspend, but instead establish a standard shutdown schedule. If users are not actively working on these machines at a preset time, such as 8:00 PM, the machines will execute their unique shutdown procedures without ever going into hibernate or suspend modes.

The result of CPM schedule management is immediate savings and greater efficiency. During the day, when the majority of users are hard at work, there are no interruptions and the users see no change in their productivity. At night, when productivity is less of an issue, energy-conserving nighttime schemes can be switched into effect, with shorter delay times and with modes such as hibernate and suspend enabled. These more aggressive settings adjust personal computer power consumption according to usage, put an end to waste, and guarantee that no PCs are left to run in high-power modes all night or all weekend.

NR-12: Natural Gas Delivery Consolidation

NMSU currently receives both medium pressure (125 pounds per square inch gauge [psig]) and high- pressure (340 psig) natural gas from the city. Medium pressure gas is distributed throughout campus via regulator stations to serve the majority of process loads. Both the gas turbine generator and boilers receives high-pressure gas.

According to 2012 City of Las Cruces billing data, NMSU consumed roughly 588,000 Dth of high-pressure gas and 51,000 Dth of medium pressure gas. Month-to-month consumption charges are similar between the two delivery systems, but delivery charges per Dth differ drastically with high pressure at $0.29/Dth and medium pressure at $1.02/Dth.

This measure would consolidate all natural gas delivery at high pressure. Initial costs were estimated by considering that the two main NMSU-owned regulator stations on Espina Street would need to be replaced in order to regulate down to 45 psig from a higher starting pressure. In addition to work at the regulator station locations, additional underground piping would be needed.

NR-13: Chilled Water System Economizer

The CUP absorber building has recently been vacated of two absorption chillers and now has one new steam turbine-driven chiller, leaving a sufficient amount of space for additional future equipment in the place of the second absorption chiller. The plant does not currently employ a waterside economizer for

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the CHW system, lending itself to the opportunity to investigate the potential savings of doing so. The new steam chiller will have new dedicated, single-cell, counter flow cooling tower and will only be operated in the hotter months of the year when steam is generated from the gas turbine generator exhaust in excess of campus demand. The cooling tower will be dormant during the winter and cooler months, opening an opportunity to install a CHW economizer heat exchanger in the absorber building and use the steam chiller cooling tower for free cooling during times of lower ambient conditions.

NR-14: Peak Shaving Generator

Because of the cost of natural gas versus electricity, it is sometimes economically advantageous to generate electrical power on-site, depending on the situation. NMSU currently produces campus baseline electrical power via the CUP natural gas turbine generator at a rate of roughly 4.5 MW. This arrangement makes sense when compared to both on- and off-peak electrical power consumption rates from El Paso Electric Company due to the efficiency of the turbine generator coupled with the added effect of heat recovery and steam production. An idea surfaced during the GLHN Architects & Engineers, Inc. (GLHN) 2009 NMSU Utility Master Plan to consider a natural gas-driven reciprocating power generator to be used only during on-peak electrical consumption hours. The concept represents the installation of such a generator in the vicinity of the Tortugas substation, being advantageous for distributing power to the campus feeder network. The current City of Las Cruces high pressure natural gas line is routed nearby, making for a convenient fuel source, contingent on available line capacity.

NR-15: CP Condenser Water Optimization

The existing array of electric chillers at the CUP have a reported design condenser water split of 75°F to 84.1°F, whereas the associated concrete cooling towers have a reported design condenser water split of 85°F to 95°F at 72°F WB. According to plant personnel, during times of higher ambient wet bulb temperatures, the nominal 1,500-ton electric chillers can become de-rated to approximately 1,100 tons, cutting total electric chiller capacity at the plant to roughly 75 percent.

This measure would regain chiller capacity during times of higher ambient wet bulb temperatures. This would increase current CUP CHW production capacity during hot, humid days and possibly assist in delaying necessary additions to the campus CHW production system. The proposed alterations, would likely both increase and decrease energy consumption, depending on ambient weather conditions.

NR-16: Boiler Blowdown Economizer

The CUP currently uses a steam system economizer that transfers boiler stack heat recovery to preheat boiler feedwater. The steam production system, as it stands, lends itself to an opportunity to investigate the additional effects of adding heat recovery from the continuous boiler blowdown system to preheat makeup water and further minimize heat loss from the current steam production systems.

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NR-17: Heat Exchanger Leakage

Upon discussions between NMSU and Ameresco regarding the steam distribution system, it is believed that there may be significant leakage across building steam/hot water heat exchangers campus wide.

It is recommended to perform an audit of the steam distribution system, steam traps, and condensate return system in order to attempt to quantify other associated system leakages and heat loss. The results of the suggested audits may reveal opportunities to reduce natural gas and water consumption of the NMSU main campus.

A.5 Annual Energy Use

Base year energy usage at the campus was determined by analyzing utility information recorded from April 2010 to October 2013. Due to the continuity of utility information, sub-metered data, weather and typical operations, the 12-month period from September 2011 through August 2012 was selected as the baseline energy consumption interval.

EPEC provides electricity under Rate 26 State University Rate. As indicated in Section C of this report, the annual electric utility costs are approximately $3.6 million.

The Las Cruces Utilities provides two natural gas services: industrial (low pressure) and high volume (high pressure). Industrial service is distributed from a single utility meter to individual buildings and associated university sub meters. High volume service is dedicated to the Central Utility Plant (CUP) with two meters for the cogeneration turbine and a single additional meter for the steam boilers. As indicated in Section B of this report, the annual natural gas utility costs are estimated at $3.3 million. Approximately 90 percent of these costs are associated with Central Plant Utility production of steam and electricity.

A.6 Energy Escalation Rate

A 2.97 percent energy escalation rate has been used in the cash flow for the project. This is a conservative escalation rate as compared to the forecast by the U.S. Department of Commerce – National Institute of Standards and Technology (NIST) published in the 2013 Energy Price Indices and Discount Factors. Table S-4 in the publication provides projected fuel price indices with assumed general price inflation rates. Electricity prices are estimated by the NIST to be 46 percent higher in 2027 assuming general inflation is 3 percent. This is an average inflation rate of 3.18 percent per year between 2014 and 2027. A copy of Table S-3 of the NIST publication is provided in the technical appendix.

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B.0 Facility Descriptions

The scope of this TEA includes 46 buildings at the New Mexico State University campus located in Las Cruces, NM. The facilities included in the assessment were selected by the NMSU project team based on immediate requirements, economic advantages and environmental considerations. The scope also addresses campus wide concerns with exterior pole lighting and energy management information.

This section provides a brief description of each facility.

Table B.0 below lists the structures in the scope, the square footage of the facilities, year of construction and the type of building (academic, administrative, etc.).

Table B.0. Summary of Buildings, Building Sizes, Construction Year, and Purpose Square Year Building Number - Name Feet Built Building Type/Purpose 010 - Goddard Hall 31,942 1913 Academic 032 - Young Hall 12,713 1929 Academic 033 - Kent Hall 20,473 1930 Academic 034 - Foster Hall 98,084 1930 PSL/AG/Research 035 - William B. Conroy Honors Center 9,505 1909 Academic 056 - Dove Hall 13,476 1939 Administrative 060 - Dan W. Williams Hall 36,857 1938 Academic 060A - Dan W. Williams Hall Annex 11,926 1983 Academic 083 - Milton Hall 99,311 1941 Academic 126 - Computer Center 40,288 1978 Academic 154 - Garcia Annex 28,895 1949 Administrative 164 - Neale Hall 15,868 1951 PSL/AG/Research 172 - Hadley Hall 38,199 1953 Administrative 184 - Breland Hall 95,313 1954 Academic 187 - Chemistry Building 115,878 1955 PSL/AG/Research 225 - Astronomy Building 15,486 1959 Academic 244 - Gerald Thomas Hall 139,950 1963 PSL/AG/Research 246 - Small Animal Research Lab 2,278 1962 PSL/AG/Research 248 - Regents Row 82,386 1961 Administrative 251 - Natatorium 15,421 1961 Auxiliary 261 - Student Health Center 16,456 1965 Auxiliary 263 - PSL, Clinton P. Anderson Hall 163,361 1965 PSL/AG/Research 269 - OFS Central Heating Plant 21,071 1965 Plant Operation & Maintenance 276 - Walden Hall 36,259 1966 Academic 278 - Branson Library 159,696 1951 Academic 284 - Pan American Center 215,633 1968 Auxiliary 288 - Guthrie Hall 41,531 1967 Academic 301 - Thomas & Brown Hall 49,711 1972 PSL/AG/Research 321 - James B. Delamater Activity Center 114,109 1973 Academic 330 - New Mexico Dept. Of Agriculture 28,288 1974 Independent Operations

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338 - Educational Services Center 50,366 1978 Administrative 363 - Engineering Complex I 55,585 1980 PSL/AG/Research 364 - Clara Belle Williams Hall 24,671 1978 Academic 365 - Speech Building 28,322 1978 Academic 368 - Knox Hall 75,737 1981 PSL/AG/Research 386 - Business Complex Building 54,992 1983 Academic 389 - Music Building 56,153 1913 Academic 391 - Science Hall 114,918 1987 PSL/AG/Research 397 - John Whitlock Hernandez Hall EC-2 44,107 1988 PSL/AG/Research 461 - Zuhl Library 95,952 1992 Academic 541 - Ed and Harold Foreman Engineering Complex EC-3 84,526 1997 PSL/AG/Research 551 - Skeen Hall 135,896 1999 PSL/AG/Research 585 - Jornada USDA Exp. Range HQ (Wooton Hall) 29,600 2002 Independent Operations 590 - Health and Social Services Building 64,663 2002 Academic 643 - NMDA Addition 3,120 2012 Independent Operations 644 - Chilled Water Plant 13,000 Plant Operation & Maintenance 999 - Campus Wide N/A 1888 Total 3,431,407

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Building 010 Goddard Hall

Year 1913, 1936

Square Feet 31,942

Floors 3

Building Description

Goddard Hall was constructed in 1913 and is home to the College of Engineering. In 1936, a single story annex was added to the existing structure. Alterations to the facility were performed from 1978 to 1980 and a renovation with asbestos abatement began in 2000. The original three-story building envelope consists of concrete foundation with brick exterior walls and a painted stucco exterior finish. Floors are concrete slab-on-grade predominantly covered with tile or carpet. The roof is pitched with clay terracotta tiles installed over building felt and includes attic space. The ceilings are primarily standard acoustic, lay- in panels on t-grid suspension system. The interior walls are gypsum board on metal stud with a painted finish. The windows are operable with metal frames, single-pane clear glass with shades, and no thermal breaks. The building entrances have hollow insulated steel doors fitted with fixed glass panels mounted to steel frames. Interior doors are wood. The building contains offices, laboratories, classroom/conference room space, and a student lounge.

The Goddard Annex addition has a steel reinforced concrete foundation with brick exterior walls covered with a painted, stucco finish. Floors are concrete slab-on-grade. The roof area is flat, with asphalt sheeting over a built-up roofing system and a perimeter of clay terracotta tile. The interior walls are primarily plaster on plywood paneling with painted finish. The ceilings are acoustic lay-in panels on aluminum t-grid system. The windows are operable, metal frame, single-pane glazed glass with no thermal breaks.

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HVAC Systems

The HVAC systems at Goddard Hall were completely replaced in 2000 with a combination of VAV / FCU units. The fan coil units serve the West first level and all of the second and third levels. Single-duct VAV terminals with hot water coils serve the East first floor (only). A Heat recovery unit on the roof reclaims heat from the exhaust air and pretreats the outdoor or make-up air. Two types of fan coil units serve the spaces – ceiling plenum mounted and wall units as required by the space function. The outdoor / make- up air for the ceiling-mounted FCUs is blown into the ceiling plenum where it mixes with the return air from the space and enters the ceiling-mounted FCUs thru filters mounted on the back of the ceiling- mounted FCUs. The make-up / outdoor air for the wall-mounted FCUs is introduced directly into the spaces served via diffusers or registers. Likewise, exhaust air on the wall-mounted configuration exhaust air directly from the spaces served. The exhaust for the ceiling-mounted FCUs is drawn directly from the ceiling plenum (in a location some distance from the make-up air entry point). The heat recovery air handling unit has no heating or cooling coils as such and conditions the outdoor makeup air to the extent it is able within the exhaust air temperature.

Heating for space conditioning is provided by the Nemco heating package equipped with its own pumps and controls. The BAS system is set up to vary hot water supply temperature setpoint as a function of load. At 90 percent load the setpoint is 140ºF and at 0 percent load, the HW setpoint is 100ºF A low pressure steam to water shell and tube heat exchanger provides hot water for domestic purposes. Some of the pumps for the West side conditioning are located in the T & B building basement. AHU-2 has a heating coil with a three-way control valve and the end of the line heating coils on the VAV boxes have three-way control valves. Fan coils end of the line heating coils are equipped with three-way control valves with all others being two-way. The heating pumps are not on a VSD and rely on the three-way control valves and the riding-the-pump curve technique to respond to lower heating loads.

Cooling with chilled water provided by the central plant and has the typical Tour Anderson balance valve, flow meter, and a bypass line with a check valve installed to provide tertiary chilled water pumping for the building. The chilled water pumps are on VSDs and respond to the closing of the control valves on AHU-2 and the FCUs.

Ventilation is provided, in part by the exhaust side of the heat recovery unit and is supplemented by individual exhaust fans. Outdoor air is pre-treated by the heat recovery unit and conditions the make-up / outdoor air within the constraints of the return air and outdoor air temperatures and vapor content.

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AHU-2 conditions the air distributed to the VAV terminal units. The cold deck temperature setpoint is reset as a function of outdoor air temperature. At 40ºF outdoor air temperature (OAT) the CD setpoint is 65ºF. At 95ºF OAT, the CD setpoint is 55ºF. As the space temperature load drops, the VAV terminal units throttle down the supply air CFM to a minimum CFM dictated by the exhaust CFM requirements of the spaces or zone being served by the individual VAV box. At some point in this throttling down of the supply CFM, the VAV box heating coil control valve starts to open and modulates to full open at full heating load.

AHU-2 also has 100 percent outdoor air capability for economizer sequence. Return air dampers on the mechanical room wall, equipped with DDC damper actuators throttle the amount (CFM) of return air entering the mechanical room (used as a plenum). Outdoor and exhaust, or relief dampers with modulating actuators in a similar arrangement, are modulated to provide a mixed air temperature suitable for distribution to VAV boxes for free cooling. At an outdoor air temperature of 75ºF, the system reverts to mechanical cooling (chilled water from central plant).

The VAV box sequence requires minimum CFM to address replacing the exhaust air removed from the spaces by the exhaust systems. Therefore, a certain amount of reheating is occurring, if the heating plant is operating. The heating valve may not be all the way closed when the CFM of the cooling air starts increasing from minimum.

Table B.1 provides a schedule of the available mechanical equipment installed at Goddard Hall.

Table B.1. Building HVAC Schedule

Equipment Qty. Rating Service AHU-1 1 3,300 CFM 1913 All Floors AHU-2 1 30,000 CFM 1936 First Floor FC-1 12 300 CFM 1913First, Second, and Third Floor FC-2 3 400 CFM 1913 First, Second, and Third Floor FC-3 7 600 CFM 1913 First, Second, and Third Floor FC-4 9 800 CFM 1913 First, Second, and Third Floor FC-5 8 612 CFM 1913 First and Third Floor TU 43 0-2300 CFM 1936 First Floor ESP-1 & 2 2 5 / 120 / 55 HP / GPM / Ft. hd. CHW Water Loop HTP-1 2 5 / 100 / 65 HP / GPM / Ft. hd. HW Loop EF-1 1 900 CFM 1936 Restroom Exhaust EF-2 1 115 CFM 1936 Laboratory Exhaust EF-3 & EF-4 2 500 CFM 1936 Restroom Exhaust

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EF-5 1 300 CFM 1936 Mechanical Room Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil

Lighting Systems

The predominant lighting used throughout Goddard Hall includes:

• Classrooms – 2x2 2 lamp U T8 fixtures. • Hallways – 2x2 2 lamp U T8 fixtures and CFL recessed cans along with some 2 lamp T8 cove fixtures. • Offices – 2x2 2 lamp U T8 fixtures, CFL recessed cans and 2x4 4 lamp parabolic T8 lay-in fixtures. • Restrooms – CFL recessed cans. • Exterior – High pressure sodium and metal halide wall mount fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. Laboratories are equipped with a wide variety of test and measurement instruments and fixtures. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Vending machines are located in the hallways. Detailed plug load survey results are available in the technical appendix.

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Building 032 – Young Hall

Year 1929, 1953

Square Feet 12,713

Floors 2

Building Description

Young Hall is home to the departments of military science and aerospace studies. It was built in 1928 and named for Regent R.L. Young. The building's renovation maintained its exterior shells with a new building inside. Today it is home to the school's ROTC programs. The two-story building envelope consists of a concrete foundation and exterior masonry walls. The floors are slab-on-grade with a linoleum tile finish. Interior walls are gypsum board over framing. The roof is area is flat, with asphalt sheeting over a built-up roofing system surrounded by a perimeter of clay terracotta tiles. An aluminum t-grid ceiling suspension system with acoustic lay-in panels is installed in the interior spaces. Windows are 1” solar bronze mounted in aluminum frames with interior shades. The building entrances have hollow insulated steel doors fitted with fixed glass panels mounted to steel frames. Interior doors are a combination of wood and metal.

In 1952, a stairwell atrium with an elevator system was added to the east side of the building. The foundation is reinforced concrete with masonry brick exterior walls and a CMU elevator shaft. The roof is flat with asphalt sheeting over a built-up roof. The windows are ¼” solar bronze glass mounted in aluminum frames. Entrances have hollow insulated steel doors fitted with fixed glass panels. The interior walls are gypsum board over metal studs with a painted finish. Floors are slab-on-grade with a linoleum tile finish.

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HVAC Systems The HVAC systems serving Young Hall were installed in 1981. A single rooftop-mounted variable air volume air handling unit serving single-duct terminal units equipped with hot water heating coils throughout the building. The supply and return fans of the rooftop air handler include inlet vanes and the fans were selected to track one another via flow measurement stations and static pressure sensors. The inlet vanes and associated controls remain pneumatic, as do the terminal unit / box controls. The boxes had a minimum setting, unless otherwise noted, and the idea was that the CFM of the box was a least as much as the exhaust CFM in the box zone. The big chilled water and hot water control valves have been converted to DDC and are, to some extent, controlled to a sequence different from the installed sequence.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with DDC steam valves modulated to control hot water supply temperature to the heating coils serving the roof-mounted VAV air handler, Branson Hall, and all of Young Hall VAV box hot water coils. The hot water supply temperature setpoint is reset to 180ºF when the outdoor air temperature is20ºF and at 85ºF OAT the reset is 120ºF. Space heating is accomplished partially by the rooftop VAV air handling unit’s hot water heating coil and partially by the hot water coils at each of the terminal unit boxes. The discharge temperature of the air handler is under DDC, but the terminal unit hot water control valves are under local pneumatic room thermostat control. The box hot water control valves are three-way and the AHU control valve is two-way. There is a handful of hot water convectors included for restrooms. A small electric unit heater heats the control room in the NE corner of the first floor.

Ventilation: Exhaust -Facility has in-line ceiling-mounted and ceiling exhaust fans removing air from spaces thru dedicated ductwork in the ceiling to louvers on outside walls. A relief rood is included to relieve excess outdoor air during non-economizer mode. Make-up or outdoor air is introduced to the building via the roof-mounted air handling unit. A minimum setting of supply air CFM is needed to offset the exhaust CFM being drawn from the building by the exhaust fans. Any excess outdoor air created by free cooling mode of air handler is allowed to exit the building via the relief hood mounted on the roof.

Cooling: The systems serving the building are capable of 100 percent outdoor air CFM (free cooling) during range of 55ºF to 68ºF outdoor air temperature. During these times the local

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controls modulate dampers to maintain a 58ºF discharge temperature from the air handler. DDC has been added to control roof air handling unit discharge air temperature to a setpoint reset by outdoor air temperature. At 45ºF OAT the setpoint is 66ºF and at 95ºF OAT discharge air temperature setpoint is 56ºF. No return air humidity override was observed. If the heating plant is active, a certain amount of reheating of the supply air is occurring to maintain space temperature control. If the supply or discharge air temperature is low enough to satisfy the (box) zone with the highest anticipated or worse case demand for cooling, all the other boxes in the building have to (re)heat the air in order to maintain space setpoint. Increase in sensible load in the spaces (computers, monitors, etc.) might be forcing the operator to reset the discharge temperature down below what the majority of the zones require. Air balancing issues and occupant preference might also drive the setpoint down, increasing the (re)heating. Minimum CFM setting of the box for exhaust requirements would also force reheating the supply air being introduced into the space at the supply diffusers.

Table B.2 provides a schedule of the available mechanical equipment installed at Young Hall.

Table B.2. Building HVAC Schedule

Equipment Qty. Rating Service PRTU 1 15,501 CFM All Floors TU 21 0-1350 CFM All Floors ESP-1 1 3 / 35 / 71 HP / GPM / Ft. hd. HW Water Loop ESP-1 1 5 / 58 / 82 HP / GPM / Ft. hd. CHW Water Loop HE 1 35 GPM Notes: BTUH = BTU per hour CHW = chilled water coil CFM = cubic feet per minute (air) GPM = gallons per minute HP = horsepower HW = hot water coil

Lighting Systems

The predominant lighting used throughout Young Hall includes:

• Offices – 2x4 4 lamp prismatic fixtures. • Conference Rooms – 2x4 4 lamp prismatic fixtures. • Hallways – 2 lamp prismatic fixtures. • Exterior – High pressure sodium wall mount globe fixtures and recessed soffit fixtures.

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Plug Load Equipment The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. A vending machine in located in the hallway. Detailed plug load survey results are available in the technical appendix.

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Building 033 – Kent Hall

Year 1930

Square Feet 20,473

Floors 2

Building Description Kent Hall was completed in 1930, and was designed as a men's dormitory, altered to a women’s dormitory in 1936, and later completely renovated, adding an elevator system in 1985. The structure currently houses the University Museum, which features exhibits and displays from the university's permanent collections. The hall is dedicated to former Harry L. Kent who served as University President from 1921 to 1936. The building consists of two floors above ground with a basement floor below grade. The envelope consists of a concrete foundation and masonry walls with a painted, cement stucco exterior finish. The floors are slab-on-grade with carpet finishes; the lobby area retains the original wood floor. The interior is typically finished with painted gypsum sheathing, with the lobby walls show the original plaster surface. The roof is pitched, displays a bell tower, and is finished with clay tile and wood sheathing. The ceilings are primarily standard acoustic lay-in panels installed in an aluminum t-grid suspension system. Typical windows have aluminum frames with ¼” insulated tempered glass and gray UV filtering tint. Entryway doors are insulated hollow steel mounted in metal frames with tinted glass panels; exit doors are solid core wood or hollow metal mounted in a metal frame. Interior doors types are primarily wood with hollow metal frames.

HVAC Systems

The HVAC systems serving Kent Hall were installed in 1985. The facility is served by a DDC controlled heating and cooling plant in the basement – serving wall/floor-mounted four-pipe unit ventilators with pneumatic controls. The chilled water pumps are redundant, the two hot water pumps have 100 percent redundancy and all pumps have VSDs. A schematic design drawing indicated some unit

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ventilators were to be equipped with humidification capability. A water (chilled) cooled window unit serving after hours space is tied into the chilled water piping and is equipped with a two-way pneumatic control valve. The buildings plant is set up for total DDC and variable speed pumping and the outlying FCUs / unit ventilators need only be converted to DDC two-way control valves and space temperature sensors for the building to be completely DDC operable.

Ventilation: Exhaust - Facility has ceiling exhaust fans ducted out to wall louvers. Exterior wall-mounted unit ventilators have provisions for outdoor air intake.

Cooling: The hydronic cooling is provided by typical central plant tertiary pumping configuration, with a DDC bypass control valve controlling the return chilled water temperature to a setpoint of 57ºF. The chilled water pump does have a redundant back-up pump and is equipped with a VSD. Space cooling is accomplished at the unit ventilator cooling coils, which have pneumatic actuated chilled water two-way control valves and are controlled, in sequence, with the (pneumatic) hot water two-way control valves. Some pneumatic thermostats are wall-mounted in the space served and some are mounted up inside their respective unit ventilator return air chamber. Basement storage space Room 002 is served by a modified window unit which rejects heat to the chilled water via a dedicated chilled water line and a special heat exchanger.

Table B.3 provides a schedule of the available mechanical equipment installed at Kent Hall.

Table B.3. Building HVAC Schedule

Equipment Qty. Rating Service CHWP-1 & 2 2 3 / 80 /63 HP / GPM /Ft. hd. CHW Water Loop HWP-1 & 2 2 1 ½ / 50 / 40 HP / GPM /Ft. hd. HW Loop

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FCU* 27 0-1000 CFM 1st and 2nd Floor HE 1 50 GPM HW Loop Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil *Quantities estimated from design drawings

Lighting Systems

The predominant lighting used throughout Kent Hall includes:

• Offices – 2x2 4 lamp 2’ fixtures and incandescent track fixtures. • Hallways – 2x2 4 lamp 2’ fixtures. • Restrooms – 2x2 4 lamp 2’ fixtures. • Exterior – Metal halide canopy fixtures and high pressure sodium wall packs.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Vending machines are located in the hallways. Detailed plug load survey results are available in the technical appendix.

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Building 34 - Foster Hall

Year 1930, 1935, 1969, 2005

Square Feet 98,084 Floors 4

Building Description

Foster Hall houses the Biology and Agriculture Departments, and includes a wide variety of functional spaces including classrooms, offices, and laboratories. The building was originally constructed in 1930, with major additions in 1935, 1969, and 2005. The original 1930-35 sections include rough 23,000 sq. ft. with two floors above ground with a basement floor partially below grade. The envelope consists of 16” steel reinforced concrete foundation walls, 12” reinforced concrete walls with a cement stucco finish and a plaster interior finish. The windows are double-hung operable units with fixed sashes, metal frames, single-pane and no thermal breaks. The roof is pitched, with clay tile and wood sheathing over an un- insulated attic space.

The 1969 addition includes roughly 41,000, sf. basement included, and a three-story addition to the south of the original 1930-35 structure. The envelope consists of 6”- 16” reinforced concrete foundation walls, 8” un-insulated concrete masonry unit walls with cement stucco exterior finish and painted interior finish, and precast concrete walls with smooth interior and textured exterior finishes. The windows are inoperable single-pane, metal frame units with neutral gray glass and no thermal breaks. The roof consists of gravel over 2” of rigid insulation over precast concrete tees.

The 2005 addition includes 29,000 sf, basement included, and a three-story addition to the south and west of the 1969 structure. The envelope consists of exterior stucco finish, ½” gypsum sheathing, R-19 batt insulation, and 3” airspace. The interior is finished with painted ⅝” gypsum sheathing. The windows are inoperable double-pane metal-framed units with thermal breaks. The roofing consists of a pitched perimeter construction of concrete tiles over ½” plywood sheathing, 2½” rigid insulation, and a metal deck. The interior roof construction includes built-up roofing with an adhered membrane finish over 2½” rigid insulation and a 4” concrete deck.

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HVAC Systems

The HVAC systems at Foster Hall include central air handling systems with hot water and chilled water coils, zone air terminal units, and zone fan coil units with auxiliary fresh air supply. The HVAC systems are served from the central plant chilled water and steam systems, with hot water provided via steam-to-hot water heat exchangers.

The north and west wings of the 1930-35 section are conditioned by four-pipe fan coils with three speed fan motors. Each unit has hot and chilled water coils with pneumatic two-way valves. Ventilation for these spaces is provided by a dedicated 100 percent outdoor air make-up air handling unit (MAU-1) with a constant speed fan, hot water coil, and chilled water coil. The associated zone thermostats are stand-alone electronic units with on/off, fan speed, and thermostatic control.

The east wing second and third floor corridors and stairwells of the 1930-35 section are conditioned by AHU-1. AHU-1 is a 100 percent outdoor air, constant volume unit with a VFD equipped supply fan, steam and chilled water coils and direct digital control (DDC) two-way valves.

The ground, first and second floors of the east 1930-35 section, and the ground and first floors of the 1969 section are conditioned by a large built-up AHU (AHU- 4). AHU-4 is located in the 1969 ground floor mechanical room, and is a dual-duct, constant volume unit. It has hot water and chilled water coils, each with a two-way valve, two supply fans, and two relief fans. During the 2005 addition and renovation, one relief fan was abandoned in-place, heat recovery wheels were removed, and the fan motors retrofitted with variable frequency drives (VFD) for re-balancing. The AHU-4 controls have all been converted to DDC, with the exception of pneumatic actuators for the hot water and chilled water control valves. The controls associated with the AHU-4 zone are also pneumatic.

The third and fourth floors of the 1969 section are conditioned by AHU-2. AHU-2 is located on the roof of the 1969 addition and is a single-duct variable air volume unit. It has hot water and chilled water coils, each with a two-way valve and single supply and relief fans. The supply and relief fan motors are equipped with VFD, and modulate to maintain a static pressure setpoint within the VAV duct distribution system. Each zone served by AHU-2 has a VAV air terminal unit with hot water reheat coils. All controls associated with AHU-2, including the associated zone terminal controls are

DDC.

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The all four floors of the 2005 section are conditioned by AHU-3, whose configuration and zone terminals are identical to AHU-2. See Table B.4 for a detailed schedule of the Foster Hall AHU.

Seven constant speed exhaust fans provide general, laboratory, and restroom exhaust. The general and restroom exhaust fans operate based on the building occupancy schedule. The laboratory exhaust fans operate continuously. See Table B.4 for a detailed schedule of the Foster Hall AHU.

Chilled water for the Foster Hall cooling systems is provided by the campus central chilled water loop. Chilled water is distributed to these systems by a single, constant volume, chilled water pump. The chilled water pump is enabled based on AHU chilled water valve position as a proxy for cooling demand. Foster Hall is not equipped with a chilled water pump bypass or a modulating control valve on the return loop.

Hot water for the Foster Hall AHU and FCU heating coils, and re-heat coils is provided by steam-to-hot water heat exchanger. Steam is provided by the campus steam loop, with and the heating hot water supply temperature setpoint is controlled by modulating steam control valves. The supply temperature setpoint is reset according to outside air temperature. Heating hot water is distributed throughout the building by a variable volume hot water pump with a VFD controlled motor. A hot water generator is used to transfer heat from steam to the building’s heating water and domestic hot water systems. See Table B.4 for a detailed schedule of Foster Hall hot water and chilled water distribution equipment.

This building is equipped with Schneider/TAC DDC system for operation of the chilled water system, hot water system and each air handler.

Table B.4. Building HVAC Schedule

Equipment Quantity Rating Service AHU-1 1 14,650 CFM 1930-35 Second Floor Stair, Corridor AHU-2 1 30,000 CFM 1969 Third and Fourth Floors AHU-3 1 36,000 CFM 2005 All Floors AHU-4 1 30,000 CFM 1930-35 First Floor East Wing, 1969 First and Second Floor MUA-1 1 7,000 CFM 1930-35 All Floors, North and West Wings HE-1 1 500 CFM Hood Exhaust HE-2,3 2 10,100 CFM Hood Exhaust GE-1A 1 6,700 CFM 1930-35 General Exhaust GE-1B 1 8,800 CFM 1930-35 General Exhaust

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GE-2 1 47,000 CFM 1970 General Exhaust Hood Exhaust 6 5,700 CFM 1930-35 Hood Exhaust EF-1 1 1,710 CFM Toilet Exhaust FCU-1 thru 99 99 160 – 1,000 CFM 1930-35 North and West Wings CHW Pump 1 10 HP 553 GPM, 40 ft. hd. CHW Loop HHW Pump 2 5 HP 244 GPM, 41 ft. hd. HW Loop Notes: HP = horsepower MBH = 1,000 BTU per hour GPM = gallons per minute Ft. hd. = feet of head CFM = cubic feet per minute (air)

Lighting Systems

The predominant lighting used throughout Foster Hall includes:

• Classrooms – 3 lamp T8 indirect fixtures.

• Hallways – 2 lamp 28w T8 parabolic fixtures.

• Labs – 3 lamp T8 industrial fixtures and 2 lamp box fixtures.

• Offices – 2 lamp box fixtures and 2x4 3 and 4 lamp T8 fixtures.

• Restrooms – 2 lamp T8 indirect fixtures.

• Exterior – Metal halide wall mount fixtures and CFL wall pack fixtures.

Plug Load Equipment

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Building 035 William B. Conroy Honors Center

Year 1909

Square Feet 9,505

Floors 3

Building Description The William Conroy Honors Center was built in 1909 and was originally designed as a YMCA facility. It is the second oldest building on Campus. The structure has housed a variety of university departments over the last 100 years and is presently the home of the New Mexico State University Honors College. The center includes offices, a commons area, seminar rooms, and an exhibition area. The building was completely renovated between 2000 and 2002 with an elevator system jointed to the east side of the structure. The original building has a concrete foundation and brick masonry exterior walls with a painted stucco finish. Floors finishes include concrete, tile, and carpet. The roof is pitched with clay terracotta tiles installed over rafters with 9” batt insulation. The ceilings are primarily standard acoustic, lay-in panels on a t-grid suspension system. The interior walls are a combination of gypsum board and veneer plaster with painted finishes. The windows are double hung and operable with metal frames, dual-pane tinted glass or reflective film; west facing windows are fitted with screens. The building entrances have hollow insulated metal doors fitted with fixed glass, tinted panels mounted to metal frames. Interior doors are primarily wood. The building contains offices, study areas, and a computer center.

The elevator addition has a concrete slab over structural fill and compacted earth foundation and is joined to the original building with a bridging walkway. Walls are steel reinforced CMU with grout fill; interior walls are gypsum board with a painted finish. Floors are finished concrete over steel decking. An EPCM membrane system is installed over the flat roof. The windows are double hung and operable with metal frames, dual-pane tinted glass. A stairway allows access to each floor of the main building.

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HVAC Systems

The HVAC systems serving William B. Conroy Honors Center were installed in 2000. The facility is served by a DDC controlled heating and cooling plant in the basement – serving wall-mounted four-pipe fan coil units with DDC controls. The chilled water pump is primary, the two hot water pumps have 100 percent redundancy and all pumps have VSDs. The 100 percent outdoor air make-up unit pretreats the outdoor air and is ducted around the perimeter of the third floor spaces and thru occupied space walls. It is also ducted to strategic locations and goes down thru the second floor ceiling to provide make-up air for the second floor. Lastly, it was connected to three of the four original chimneys and ducted down to the ceiling of the first floor. This make-up unit was not equipped with any outdoor air damper. The building is completely DDC controlled clear out to the fan coil unit / space temperature control.

Ventilation: Exhaust Facility has ceiling exhaust fans ducted out to wall louvers. A dedicated 100 percent outdoor air chilled water / hot water make-up or outdoor air unit is installed in an attic type space outside of the occupied area of the third floor. It is ducted to blow 75ºF air directly into the spaces on the first, second and occupied parts of the third floor.

Cooling: The hydronic cooling is provided by typical central plant tertiary pumping configuration, with a DDC bypass control valve controlling the return chilled water temperature to a setpoint of 57 ºF The chilled water pump does not have a redundant back-up pump and is equipped with a VSD. Space cooling is accomplished at the unit ventilator cooling coils, which have DDC chilled water two-way control valves and are controlled, in sequence with the (DDC) hot water two-way control valves. The makeup air handling unit cools outdoor air portion to 75 ºF dry bulb. The hot water coil precedes the cooling coil (freeze protection). Since this is a modulating chilled water control valve type arrangement, de-humidifying and then reheating to 75 ºF is

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not possible.

Table B.5 provides a schedule of the available mechanical equipment installed at the William B. Conroy Honors Center.

Table B.5. Building HVAC Schedule

Equipment Qty. Rating Service MA 1 2680 CFM All Floors FCU 18 0-1120 CFM All Floors P-1 & 2 1 2 / 60 / 55 HP / GPM /Ft. hd. HW Loop P-3 1 2 / 70 / 55 HP / GPM /Ft. hd. CHW Loop VFD 3 2 HP P1, P2, & P3 C-1 1 55 GPM MA & FCU CE-1 1 90 CFM Mechanical Room CE-2 & 3 2 200 CFM Mechanical Room Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil

Lighting Systems

The predominant lighting used throughout the William B. Conroy Honors Building includes:

• Classrooms – 3 lamp indirect/direct T8 fixtures and incandescent can fixtures. • Hallways – CFL globe fixtures and MR16 track fixtures. • Offices – 3 lamp indirect/direct T8 fixtures and CFL globe fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors, and printers. The break room has a refrigerator, a microwave oven, and other kitchen appliances. Other plug loads include copiers and fax machines and a commercial coffee maker. Detailed plug load survey results are available in the technical appendix.

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Building 056 Dove Hall

Year 1939

Square Feet 13,476

Floors 2

Building Description Dove Hall was completed in 1939 as Works Project Administration (WPA). A complete renovation of the structure was completed in 1988 and the facility now accommodates the offices of University Advancement including the Alumni Association, Foundation, and Development. The building includes approximately 13,000 sf with two floors above ground and a basement partially below grade. The envelope consists of a concrete foundation and masonry walls with a cement stucco exterior finish. Interior walls are primarily gypsum board with smooth and textured painted finishes. Floors are slab-on- grade with tile and linoleum finishes in the common areas and carpeting in the office spaces. The roof is pitched with clay tile and wood sheathing over an un-insulated space. Ceilings are a combination of exposed floor framing, suspended acoustic tile or suspended plaster. Windows are metal clad with insulated fixed glazing and no tint. Entryway doors are insulated hollow steel-mounted in metal frames. Interior doors types are either wood or hollow metal-mounted in appropriate framing.

HVAC Systems

The HVAC systems serving Dove Hall were installed in 1987. This system was installed as VAV with pneumatic controls throughout and has since been partially converted to DDC. The original inlet vanes on the fan have been removed and replaced by VSD. The lead pumps, for chilled water, hot water, and domestic have been converted to VSD. Some of the air handling unit’s sequence of operation has been partially replaced by DDC, utilizing digital to pneumatic transducers to interface the two types of control systems and retain strategic portions of the pneumatic systems, which necessitates pneumatic air remaining operational.

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The original system employed a central station heating and cooling air handling unit with 100 percent outdoor air CFM capability serving single-duct variable air volume VAV terminal units. The VAV boxes were equipped with hot water coils and three-way control valves. The air handler chilled water control valve was a two-way type. The outdoor air dampers consist of a minimum outdoor air damper and actuator and the economizer outdoor air damper and actuator, which allows make-up air for exhaust requirements controllable as a separate function. The system was set up to use outdoor air for free cooling up to a point at which it would switch to non-economizer mode. In this mode, only the required minimum outdoor air CFM was mixed with the return air and conditioned with chilled water from the central plant.

It appears the VAV boxes have fairly recently been replaced with total DDC boxes two-way valves and room thermostats (TAC). With the heating and cooling plants converted to almost entirely DDC and the boxes being total DDC, this building is in good control strategy standing.

Ventilation: Exhaust Facility has ceiling-mounted in-line exhaust fans ducted out to wall louvers. Outdoor air introduced at the air handler in the basement. The air handler economizer mode provides outdoor air into the space. Motorized outdoor air damper in wall of basement mechanical room introduces outdoor air into the mechanical room which acts as a plenum. A return air chase from floors above returns air to the plenum.

Table B.6 provides a schedule of the available mechanical equipment installed at Dove Hall.

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Table B.6. Building HVAC Schedule

Equipment Qty. Rating Service AHU-1 1 17,500 CFM All Floors VAV TU 26 0-1300 CFM All Floors ESP-6 & 7 2 5 / 110 / 60 HP / GPM /Ft. hd. CHW Water Loop ESP-8 & 9 2 3 / 65 / 90 HP / GPM /Ft. hd. HW Loop HE-2 1 1260 PPH Steam-to-HW HE-3 1 100 PPH Steam-to-DHW CE-11 thru 14 4 190 CFM First and Second Floor Restrooms Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout Dove Hall includes:

• Offices – 2x4 3 lamp T8 lay-in fixtures and incandescent can fixtures. • Hallways – LED cans and CFL cans. • Restrooms – 2x4 and 1x4 3 lamp T8 lay-in fixtures. • Exterior – High pressure sodium globe type fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, a coffee maker, and other kitchen appliances. Other plug loads include copiers and fax machines. Detailed plug load survey results are available in the technical appendix.

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Building 060 – Dan W. Williams Hall

1938, 1983, 1985, 1998 Year 2005

Square Feet 38, 521

Floors 2

Building Description Dan W. Williams Hall was built in 1938 as a gymnasium and is named after Dan Williams who was the Board of Regents president in the 1930s. In 1972, the facility was remodeled to accommodate the Department of Art with an annex constructed to the south of the hall, in 1983. Lobby space and a storage/kiln structure were added in 1985 and 1998 respectively with additional office spaces appearing in 2005. In addition to serving as the University Art Museum, the facility now provides more than 38,000 sf of teaching space and laboratories. The original 1938 building envelope consists of reinforced concrete foundation and brick masonry exterior with a painted, cement stucco exterior finish. The floors are slab- on-grade with tile, painted concrete, or natural concrete finishes. Interior walls are a combination of gypsum board on frame, painted masonry, and painted CMU surfaces. The roof surface is finished with a white reflective membrane. Work area ceilings are unfinished or painted with exposed HVAC ducting and piping. The gallery area ceiling is exposed with a painted black finish. Laboratories have a lay-in acoustic tile ceiling. The windows are operable, clear glass in metal frames with no thermal breaks. Interior doors are primarily hollow metal doors mounted in hollow frames.

The single story 1983 annex addition added 11,926 sf to the Department of Art facility. The envelope consists of 12’ steel reinforced concrete foundation footers and 4” steel reinforced concrete foundation slab. The exterior walls are comprised of 6” metal studs and synthetic stucco over 1” insulation, ⅝” water proof sheetrock, and R-19 fiberglass batt insulation. Floors are finished with smooth concrete, tile and carpet. Interior walls are finished gypsum board. The roof area is flat

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with a built-up roof over 3” urethane insulation and metal decking. The ceilings are primarily acoustic lay- in panels on an aluminum t-grid suspension system. Windows are fixed with bronze tint glass. The entrance door is hollow metal with ¼” tinted safety glass. Interior doors are primarily hollow wood doors mounted in steel frames.

The 1985 addition lobby includes roughly 1,000 sf. The foundation is reinforced concrete with a 4” slab. The exterior walls are comprised of 6” metal studs and an insulated finish system over ½” water proof gypsum board and batt insulation. Floors are finished with smooth concrete and carpet. Interior walls are ⅝”gypsum board installed over 6” metal studs with painted finish. The roof area is flat with a built-up roof over rigid insulation and metal decking. Ceilings are suspended with acoustical tiles. Windows have hollow frames with ¼” tempered, insulated, glass with bronze tint. The entrance has a hollow metal door mounted with ¼” tempered, insulated, glass, bronze tint, and hollow metal frames. Interior doors are solid core wood or hollow metal mounted in hollow frames.

In 1998, clay storage and kiln equipment structure located on the west side of the hall added over 400 sq. ft. to the facility. The building has a reinforced concrete foundation, 8” reinforced CMU walls and a painted finish. The floor is slab-on-grade with no finish. The roof area is flat with a built-up roof over rigid insulation and metal decking. The entry door is hollow metal with laminated glass and ventilation louver.

Art gallery offices were added to the west side of the facility between the main building and annex in 2005. Access to the offices is through the annex. The addition is over 500 sq. ft. and has a reinforced concrete foundation and 4” slab. The exterior walls are comprised of 6” metal studs and synthetic stucco over 1” insulation, ⅝” water proof sheetrock, and R-19 fiberglass batt insulation. Interior wall are textured paint on gypsum board. The floor is slab-on-grade with vinyl finish. The ceiling is suspended with lay-in acoustical tiles. The roof area is flat with a single-ply membrane over ½” insulation, ⅜”deck board, and R-30 rigid insulation. Windows are 1” insulated glass with an operable panel. Doors are wood on hollow metal frames.

HVAC Systems

The HVAC systems serving Dan W. Williams Hall were installed in 1972, 1983, 1985, 1998, 2001, and 2005. The 1972 remodeling of Williams Gym included rotary coolers, ventilation and hydronic heating from steam-to-hot water converter and pumps. In 1983 the new addition (Williams Annex) was added to the south side of the main building. These RTU’s employed refrigerated and economizer cooling with gas heating. In 1985 a one-story addition was made to the north side of the building. It included a rooftop heat pump unit with supplemental electric heat. In 1998 a small

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addition was made to the northeast corner of the main building for a kiln room and clay storage. It had provisions for evaporative cooler, exhaust, and ventilation. The 2001 project was primarily an HVAC renovation, but also included an alternate for another small addition to the southeast corner of the main building for storage and a mixing room. Conditioned air from the new HVAC unit included in the base bid was extended into these spaces and a dedicated exhaust fan was included. The 2001 project included removing existing evaporative cooling equipment, exhaust equipment, and distribution systems. The mechanical room was demolished for new heating and cooling plant equipment. A large heat recovery type system was installed along with a roof-mounted make-up air system (deleted), hoods, humidifiers, exhaust fans, single-duct terminal units with heating coils, and several constant volume exhaust regulators. In 2005 an addition was made to the art gallery offices and is served by a heat pump rooftop with refrigerated cooling and gas heating (electrical supplement) without economizer. The AC-1 100 percent outdoor air unit with runaround coil and heat wheel serving constant volume terminal units with hot water coils and constant volume exhaust regulators was rated at 26,800 CFM during Phase II and 9,800 CFM during Phase I. Hazardous chemicals warrant use of 100 percent outdoor air and the energy recovery strategy mitigates the cost of doing so.

Ventilation: Exhaust facility has few exhaust fans because of the large AC-1’s 100 percent outdoor air configuration and the use of dedicated hood exhaust at the proximity of the contaminant source. humidification needs for artwork drove use of 100 percent return air units in the Gallery, with the outdoor air requirements well addressed by AC-1. The rooftop equipment is mostly equipped with 100

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percent outdoor air capability/economizer to take advantage of free cooling and, in the other cases, has minimum outdoor air at least equal to the exhaust CFM.

Cooling: The hydronic cooling is provided by typical central plant tertiary pumping configuration, with a throttling control valve controlling the return chilled water temperature to a setpoint of approximately 58ºF. The chilled water pump does not have a redundant back-up pump but is equipped with a VSD. Space cooling is accomplished at the air handler units cooling coils, which have DDC chilled water two- way control valves. Since the main air handler AC-1 is 100 percent outdoor air and has runaround coils and a heat wheel, some of the cooling is accomplished thru heat recovery. The rooftop units utilize refrigeration source cooling, and, in most cases, have an economizer option installed for free cooling.

Humidification: Electric humidifiers serve the Gallery air handling equipment to protect the artwork. They activate in response to space humidity levels and have the appropriate high limits and safeties.

Table B.7 provides a schedule of the available mechanical equipment installed at the Dan W. Williams Hall and Annex.

Table B.7. Building HVAC Schedule

Equipment Qty. Rating Service A/C-1 1 26,798 CFM Williams Hall - All Floors A/C-17 & 18 3 3,500 CFM Art Gallery CV-1 through 9 9 0-3280 CFM Williams Hall - All Floors ECVV-1 through 13 13 0-1500 CFM Williams Hall - All Floors HWP-1 2 3 / 50 / 124 HP / GPM /Ft. hd. HW Loop CHWP-1 1 5 / 70 / 128 HP / GPM /Ft. hd. CW Loop HX-1 1 2529 / 124 PPH / GPH H-1 & 2 2 30 PPH Art Gallery RTU-11 1 3000 CFM Annex RTU-12 1 3600 CFM Annex RTU-13 1 2000 CFM Annex RTU-14 1 1000 CFM Annex RTU-1 1 1250 CFM Annex ACU-1 1 800 CFM Annex Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil

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PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout the Dan W. Williams Hall and Annex includes:

• Classrooms & Gallery – 2x4 3 lamp T8 lay-in fixtures, 2 lamp T8 industrial fixtures and incandescent track fixtures along with some LED cans and troffer fixtures. • Hallways – 2 lamp T8 wrap fixtures and 2x2 3 lamp 2’ T8 lay-in fixtures. • Offices – 2x4 3 and 4 lamp T8 and T12 lay-in fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. High temperature kilns and finishing ovens are located inside and outside of the facility. The offices have computers with flat screen monitors and printers. Computers with monitors, used by students, are located throughout the building. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Vending machines are located in the hallways. Detailed plug load survey results are available in the technical appendix.

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Building 083 – Milton Hall

Year 1941, 1959

Square Feet 99,311

Floors 2

Building Description Milton Hall was built in 1941 and named to honor former NMSU President, Hugh M. Milton. The facility accommodates the Office of Distance Education, the Department of Journalism and Mass Communications, the Teaching Academy, and the radio and television studios for the public broadcasting affiliates, KRWG-FM and KRWG-TV. Milton Hall also houses ICT's Scholarly Technology. A south addition was completed in 1959 and several interior renovations have been performed at various points through 2007. Approximately 520 staff and students visit classrooms and the production studio offices daily during spring and fall semesters. Radio and television broadcasting continue through the summer semester; however, there is a considerable decrease in building occupancy during the summer months. The original 1941 two-story building envelope is comprised of steel reinforced concrete foundation walls with concrete brick masonry finishes with cement stucco. Floors are a 4” slab-on-fill with linoleum tile, carpet tile, and carpet finishes. Interior walls are smooth with a painted finish. The roof over the main lobby is pitched, with clay tile and wood sheathing over an un-insulated attic space. The remainder on the roof area is flat, with asphalt sheeting over rigid insulation, lightweight concrete slab, and metal decking; a small portion of the surface to the northeast is foam sealed with a reflective coat. The ceilings are primarily acoustic lay-in panels on an aluminum t-grid suspension system. The majority of the windows have operable panels, fixed sashes, metal frames, plate glass, and no thermal breaks. The building entrances have steel door frames and steel doors fitted with fixed glass panels. Interior doors are hollow metal frames with a mixture of metal and wood construction.

The 1959 addition includes a one-story structure added to the south the original building. The envelope consists of 12” steel reinforced concrete foundation walls and 8” un-insulated concrete masonry unit walls with a painted stucco exterior finish. Floors are steel reinforced 4” concrete slab over gravel bed;

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finishes include linoleum tile, carpet tile, and carpet finishes. The roof area is flat, with asphalt sheeting over 2 layers of ½” rigid insulation, 3” lightweight concrete slab, and metal decking. Ceilings are acoustic tile over pasteboard or suspended ceiling system with acoustic tiles. The windows are operable, clear glass with metal-frames. The building entrances have steel door frames and steel doors fitted with fixed glass panels. Interior doors are hollow metal frames with a mixture of metal and wood construction.

HVAC Systems

The HVAC systems at Milton Hall were installed at various times over a long period of time ranging from 1959 to 2007. The documentation of the HVAC systems goes back as far as 1959 during the addition to Milton Hall which had its own chiller plant and a complete HVAC system comprised of steam to hot water converters, associated pumps air handling units, fan coil units and exhaust equipment. It also had a heating ventilating (only) unit for the Bake Shop and staff area. These original equipment rooms have been re- used or re-purposed and been replaced by new equipment, in some cases in a different location. The south end, originally the Student Union Recreation Area, was served by air handling systems in mechanical rooms since replaced by roof mounted equipment. Some configurations were retained and the equipment was replaced with modern equipment. Computer rooms have been outfitted with dedicated DX equipment and the high sensible loads associated with the radio and television equipment has been addressed with additional equipment. Modern multi-zone air handling equipment and double-duct VAV systems have been added to address loads formerly served by fan coil units of a single-zone air handler. DDC controls extending out to the space level have been installed, in some cases. There are some remnants of pneumatic controls, but the systems are generally under DDC, at least out to the air handler level (or extent). Exceptions do exist. One of the large air handlers and two of the smaller ones are still totally pneumatically controlled at the AHU as well as the box/space level.

Heating for space conditioning is provided by the typical steam-to-hot water converter with DDC resetting the hot water supply to 150ºF when the outside air temperature is 30ºF and at 80ºFat 80ºF OAT the reset is 100ºF. There are some cooling only fan coils, but many have small heating coils. The single-zone air handling equipment has hot water heating coils and the multi-zone air handler and double duct air handlers have hot decks and hot ducts (coils) respectively. Almost all air handler level equipment ha DDC of the hot water coil flow. The north end of the facility is total DDC and

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has control clear down to the zone actuators for heating. Some terminal boxes still use pneumatic controls, but not many.

Cooling with chilled water, provided by the central plant, has flow control at 49ºF back to the plant, keeping an unusually low return temperature in an effort to satisfy the high sensible load areas associated with KRWG, which provides tertiary chilled water control for the building. The lead chilled water pump is on a VSD and responds to the closing of the control valves on the AHUs and the FCUs.

Ventilation is provided by minimum outdoor air settings on the air handlers and by dedicated exhaust equipment installed at strategic locations in the system. The economizer capabilities of the air systems provide additional ventilation when in economizer mode.

AHU-1 Migrant is a double-duct system without a VSD and return fan. Engineering documentation indicates the hot deck is reset from 100ºF at 0 percent load and to 72ºF at 50 percent load (however, this is most likely incorrect and should read 100ºF at 50 percent load and 72ºF at 0 percent load). AHU-2 KRWG is a single-zone system with return fan and is solely on VSD. Humidity (space) override is in place to limit the humidity level in the space. Supply air temperature setpoint is reset with space temperature (with humidity override) on the outdoor air dampers.

which services the KRWG Radio and Broadcast Offices is a double-duct system with supply and return fans. Only the return fan is on VSD. An additional return (exhaust) fan has been added to serve the TV equipment areas (by drawing air out of these areas, more supply air flows thru these areas). The hot deck is reset to 110ºF at 35ºF outside air temperature and to 75ºF at 100ºF outdoor air temperature. The cold deck is reset to 60ºF when the outdoor air temperature is 35ºF and 50ºF when the outdoor air temperature is 90ºF, which addresses the high sensible load associated with the TV equipment.

The VAV box sequence requires minimum CFM to address replacing the exhaust air removed from the spaces by the exhaust systems. It is possible the sequence of operation has a little overlap of cooling air and heating air. If the heating plant is active, and the overlap exists, a relatively small amount of simultaneous cooling and heating is occurring.

Table B.8 provides a schedule of the available mechanical equipment installed at Milton Hall.

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Table B.8. Building HVAC Schedule

Equipment Qty. Rating Service AH-1 1 16,000 CFM First Floor ACU-1 1 12,320 CFM Repro ACU-2 1 17,000 CFM TV Studio ACU-3 1 11,810 CFM TV Office AHU-10 2 8800 CFM First Floor AHU-11 1 7860 CFM First Floor FCU 63 0-1260 CFM All Floors VAV Unit/Boxes 21 0-3200 CFM HX 1 4,270 MBH P-1 1 15/60/635 HP / GPM /Ft. hd. Cooling P-2 1 5 / 635 / 60 HP / GPM /Ft. hd. Heating P7 1 3 / 175 /45 HP / GPM /Ft. hd. CHW loop P7A 1 2 / 125 /40 HP / GPM /Ft. hd. CHW loop P8 1 1.5 / 75 /40 HP / GPM /Ft. hd. HW Loop P8A 1 1.5 / 100 /40 HP / GPM /Ft. hd. HW Loop Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil

Lighting Systems

The predominant lighting used throughout Milton Hall includes:

• Auditorium – Incandescent and CFL cylinders along with 3 lamp T8 surface box fixtures. • Classrooms – 3 and 4 lamp T12 prismatic and paracube fixtures along with incandescent recessed cans are the main lighting types found in the classrooms. • Offices /Conference Rooms – 3 and 4 lamp T8 and T12 prismatic, paracube, and indirect fixtures. • Hallways/Common Areas – 2, 3, and 4 lamp T8 and T12 linear fluorescent fixtures found throughout the common areas and recessed CFL PL fixtures. • Restrooms – 2 and 3 lamp T8 and T12 fixtures were identified in the restrooms. • Exterior – A mix of different lamp and fixtures types were found on the exterior. High pressure sodium and metal halide wall packs, and CFL decorative type fixtures were the main fixture types.

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Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with a flat screen monitors and printers. The break rooms have refrigerators, microwave ovens, coffee makers, toaster ovens, and other kitchen appliances. Vending machines are located in the lobby. Detailed plug load survey results are available in the technical appendix.

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Building 126– Computer Center

Year 1978

Square Feet 40,288

Floors 2

Building Description

The Computer Center is mostly comprised of server rooms with equipment and offices. The building acts as the main server hub for the entire campus. The Computer Center was originally built in 1978 with numerous renovations, the most recent addition being completed in 1998.

The building includes approximately 40,300 sf with two floors above ground and a basement located below ground. The main building envelope consists of a metal frame with an exterior insulation and finishing system (EIFS). The interior walls are made of 8” sheet rock with 2” rigid stucco finish. The ceiling is made up of 8” acoustic tile drop-in. The flooring of the main building consists of concrete slab-on- grade. The doors are insulated metal frame and the windows are fixed single-pane with reflective tint. The second floor of the building has blinds covering the windows. The majority of the roof on the main building is white composition on 2” rigid insulation, while the rest of the roof is ballasted with medium gray and tan gravel on top of a black rubber membrane. There is a small section of the building in the southeast corner that contains a black membrane roof.

The addition of the computer center was built in 1998 and contains the Telecommunication and Networking Services offices. The addition is roughly 4,000 sf and is comprised of only one floor. The walls are 12” metal frame. The floor consists of carpet on a concrete slab. The windows of the addition are comprised of metal frame and are double-pane with blinds and are fixed with a reflective tint on the exterior. The roof is single membrane black rubber with insulation underneath.

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HVAC Systems

Space conditioning for the Computer Center is provided by a combination of built-up and packaged air handling units (AHU). Most AHUs are supplied with chilled water from a campus loop, hot water sourced of steam-to-hot water heat exchangers, with steam sourced from a campus loop. Chilled water and hot water are pumped from the campus loop via constant volume pumps located in Science Hall.

The 1978 and west portion of the 1998 additions are served by a constant volume dual-duct AHU with chilled water and hot water coils and full economizer capability. The AHU includes a supply and a return-relief fan. Zone control is provided by constant volume dual-duct mixing terminal units. The south portion of the 1998 addition is served by a packaged rooftop-mounted air-cooled heat pump.

The 1987 addition is served by four built-up constant volume AHUs with chilled water, direct expansion (DX) cooling coils, and duct-mounted hot water reheat coils. Heat rejection for the air-cooled DX coils is proved by rooftop-mounted condensing units. Air is distributed to the zones via a combination of under- floor plenums and ceiling-mounted ductwork. These units do not have economizer capability.

The 1998 addition is served by chilled water for the Computer Center

cooling systems which is provided by the campus central chilled water loop. Chilled water is distributed to these systems by constant volume chilled water pumps with a dedicated pump for each AHU.

Domestic hot water is provided by a steam-to-hot water heat exchanger located in the mechanical room.

The HVAC systems have a mixture of DDC and pneumatic controls at the AHU and zone levels.

Table B.9 provides a summary of the available mechanical equipment installed at the Computer Center:

Table B.9. Building HVAC Schedule

Equipment Quantity Rating Service 1978, 1998 AHU 1 Supply Fan 1 40 HP 1978,1998 Areas 1978, 1998 AHU 1 Return/Relief Fan 1 7.5 HP 1978,1998 Areas 1978, 1998 AHU 1 Return/Relief Fan 1 7.5 HP 1978,1998 Areas 1978 AHU 2 Supply Fan 1 5 HP 1978

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1978 AHU-1 Supply Fan 1 5 HP 1978 1987 AC 1, 2 Supply Fan 2 10 HP 1987 Addition 1998 South Heat Pump 1 3 ton 1998 South Addition Rooftop Unit 1 4 Ton Third Floor. Office Notes: HP = horsepower Ton = 12,000 BTU per hour

Lighting Systems

The predominant lighting used throughout the Computer Center includes:

• Offices – 2x4 3 and 4 lamp T8 and T12 prismatic and paracube lay-in fixtures. • Mechanical Areas – 2 lamp industrial and strip fixtures. • Hallways – 2x4 3 and 4 lamp lay-in prismatic fixtures. • Exterior – Metal halide wall pack fixtures.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat screen monitor and a printer. Other plug loads including copiers, fax machines, water coolers, and vending machines are in use. Detailed plug load survey results are available in the technical appendix.

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Building 154 – Garcia Annex

Year 1948, 1969

Square Feet 28,895

Floors 2

Building Description

Garcia Annex currently houses the offices for Student Support Services, Counseling and Student Development, International Programs, Placement and Career Services, and various student programs. The building was constructed in 1949 as a residence hall and remodeled in 1969 to provide office space. The building consists of two above ground floors and a below grade partial basement. The envelope is steel reinforced concrete foundation walls, precast concrete unit walls with a painted stucco exterior finish. The floors are slab-on-grade with tile and carpet flooring. The interior walls are primarily CMU block with painted finish. The center section of the building has a shallow pitched roof with clay tile and wood sheathing over un-insulated attic space. The remainder of the roof area is flat, with asphalt sheeting over a built-up roofing system and a perimeter of clay terracotta tile. Interior doors are wood mounted in wood frames. The swing windows are operable units with fixed sashes, metal frames, single- pane glass with silver tint and no thermal breaks.

HVAC Systems

The HVAC systems at Garcia Annex are served from central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water pump located in Corbett Center’s basement. There is one 5 HP chilled water in-line pump. Garcia Annex is equipped with a chilled water pump bypass and variable frequency drive (VFD) with a DDC two-way valve. A hot water generator is used

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to transfer heat from steam to the building’s hot water system. Condensate is returned to the central plant via an automatic steam trap (APT) and a condensate return unit (CRU). There is one 2-HP hot water pump with no VFD and no control valve.

The main space conditioning equipment at Garcia Annex consists of approximately 47 cabinet heating and cooling four-pipe fan coil units (FCU) located throughout each room. There is a combination of two- way and three-way valves for cooling and heating and as they fail maintenance replaces the three-way valves with two-way valves. All units have pneumatic Johnson Controls thermostats and pneumatic actuators. The Faculty Senate Chambers room has its own 3 HP McQuay Season Master FCU with pneumatic two-way valves.

Two 3-ton Trane packaged heat pumps with economizers were added on the roof for supplemental heating and cooling which feed hallways and open areas. Additionally, there were five Diakin mini split systems with wall-mounted units in offices on the second level. On the roof there were four 1.5-ton , one ¾-ton Diakin condenser, and two exhaust fans.

Table B.10 provides a schedule of the available mechanical equipment installed at the Garcia Annex.

Table B.10. Building HVAC Schedule

Equipment Qty. Rating Service Cabinet FCUs* 1-47 Not listed Whole Building HP 1-2 2 3 Tons Hallways and Open Areas CU 1-4 4 1.5 Tons Second Level Offices CU 1 3/4 Tons Second Level Office McQuay FCU 1 3 HP Faculty Senate Chambers CHW Pump 1 5/200/56 HP/GPM/FT CHW Loop HW Pump 1 2/70/56 HP/GPM/FT HW Loop Notes: HP = horsepower GPM = gallons per minute FT = static pressure (feet) Ton = 12,000 BTU

Lighting Systems

The predominant lighting used throughout Garcia Annex includes:

• Hallways - 2 and 4 lamp wrap fixtures.

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• Offices – 2 and 4 lamp T12 and T8 wrap fixtures. Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. The lobby has multiple vending machines. Detailed plug load survey results are available in the technical appendix.

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Building 164 – Neale Hall

Year 1951, 1972

Square Feet 15,868

Floors 1

Building Description

Neale Hall is home to the 4-H Youth Development Program, the Department of Animal and Range Sciences, and Future Farmers of America. The single-story structure with partial basement below grade was constructed in 1951 with an addition completed in 1972. Remodels were performed between 1974 and 1994. The hall includes classrooms, offices, storage rooms, laboratories, restrooms, freezers, and meat coolers. Building daily occupancy consists of approximately 142 students visiting classrooms and laboratories during spring and fall semesters, with a significant decrease in facility occupancy during the summer session. The original building envelope has steel reinforced concrete foundation walls, a 4” reinforced concrete slab, and insulated exterior walls with a painted stucco exterior finish. The hallway floors are finished with tile over slab. Offices and storage areas are finished with carpet and synthetic tile respectively. Interior walls have a painted textured finish. A glazed tile wainscot covers the surface of the hallway walls. The roof is flat with asphalt sheeting over a built-up roofing system and lightweight concrete slab over metal decking. The ceilings are primarily acoustic lay-in panels in an aluminum t-grid suspension system. The windows are clear glass mounted in operable metal frames or glass block mounted on stone sills. The building entrances have hollow insulated steel doors fitted with fixed glass panels mounted to steel frames. Interior doors are primarily wood in hollow metal frames.

The 1972 addition added over 4,700 sf of classroom, freezer, meat cooler and office space to the north of the existing hall. The envelope consists of 12”reinforced concrete foundation walls and 12” un-insulated concrete masonry unit walls with painted cement stucco exterior finish and painted interior finish. The windows are inoperable single-pane, metal frame units with neutral gray glass and no thermal breaks. The roof consists of a modified built-up roofing system consisting of a cap sheet, 15/16” fiberglass

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insulation adhered in hot asphalt, ½“perlire board, and a vapor barrier adhered in hot asphalt installed over a pre-stressed concrete double tree.

HVAC Systems

A number of rooftop packaged air conditioning units serve the offices and classrooms.

Cutting laboratories, cooler, and freezer areas are served by split refrigeration systems consisting of an indoor evaporator unit and rooftop condensing unit.

Domestic hot water is provided by a gas water heater located in the mechanical room.

Table B.11 provides a schedule of the available mechanical equipment installed at the Neale Hall.

Table B.11. Building HVAC Schedule

Equipment Qty. Rating Service Rooftop Packaged AC Unit w/Gas Heat 1 4 Tons Offices - South Rooftop Packaged AC Unit w/Gas Heat 1 1 Tons Offices - South Rooftop Packaged AC Unit w/Gas Heat 1 N/A Tons Office - Storage Area Rooftop Packaged AC Unit w/Gas Heat 1 N/A Tons Storage Area Rooftop Packaged AC Unit w/Gas Heat 1 3 Tons Offices - West Rooftop Packaged AC Unit w/Gas Heat 1 N/A Tons Break Room Rooftop Packaged AC Unit w/Gas Heat 1 3 Tons Classroom Rooftop Packaged AC Unit w/Gas Heat 1 4 Tons Classroom Rooftop Packaged AC Unit w/Gas Heat 1 - - Sales, Offices, Storage, and Inspection Room Refrigeration Unit 1 18,500 / 4,400 BTUH / CFM Cooler Refrigeration Unit 2 18,000 / 4,400 BTUH / CFM Freezer Refrigeration Unit 1 25,000 / 4,400 BTUH / CFM Cooler Refrigeration Unit 2 15,000 / 2,400 BTUH / CFM Laboratory Notes: Ton = 12,000 BTU CFM = cubic feet per minute (air)

Lighting Systems

The predominant lighting used throughout Neale Hall includes:

• Classrooms – 2x4 4 lamp prismatic lay-in fixtures. • Hallways – 2x4 3 and 4 lamp prismatic lay-in fixtures and 2 lamp strip fixtures.

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• Offices – 2x4 4 lamp prismatic lay-in fixtures, metal halide low bay fixtures, and 2 lamp wrap type fixtures. • Exterior – High pressure sodium wall pack fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. Laboratories are equipped with a wide variety of test and measurement instruments and fixtures. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Other plug loads include copiers, fax machines, document shedder, water coolers, vending machines, and a tabletop fan. Detailed plug load survey results are available in the technical appendix.

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Building 172 Hadley Hall

Year 1953

Square Feet 38,199

Floors 2

Building Description Hadley Hall was built in 1953 and is home to several administrative units including the President's Office, Personnel, and Financial Operations. The building includes 38,199 sf with two floors above ground and a below grade basement allowing access to the campus utility tunnel network. The envelope consists of steel reinforced concrete foundation walls and un-insulated concrete masonry unit walls with a cement stucco exterior finish. The floors are slab-on-grade with carpet finishes. The roof is pitched, with clay tile and wood sheathing over the attic space. The floors are slab-on-grade with carpet finishes. The windows are double-hung operable units with fixed sashes, metal frames, single-pane clear glass with shades, and no thermal breaks. Entrances have steel door frames and insulated steel doors fitted with fixed glass panels. Interior doors are a mixture of metal and wood construction with hollow metal frames.

HVAC Systems

The HVAC systems serving Hadley Hall were installed in 1951 and a major renovation was done in 1978. Several remodeling projects have accommodated reconfigurations of the space and upgrading the President’s Office; however, the HVAC systems have remained fan coil type system. Pneumatic controls are still used at the fan coil level and the plant has DDC controlled steam and chilled water bypass control valves. The spring ranges of the hot and chilled water control valves (two-Way) may have enough spring range shift to allow

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simultaneous cooling and heating. The main opportunity here is DDC and management of space setpoint and elimination of any simultaneous heating and cooling.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with DDC steam valves modulated to control hot water supply temperature to the heating coils serving the fan coil and make-up air units heating coils. The hot water supply temperature setpoint is reset to 170ºF when the outdoor air temperature is 20ºF and at 70ºF OAT the reset is 100ºF.. Space heating is accomplished by fan coil units with heating coils and two-way pneumatic control valves. The valves are modulated, in sequence with the pneumatic chilled water control valves. Three- Way control valves are strategically located to assure minimum flow back thru the pump.

Ventilation: Exhaust and make-up fan coil units serve to ventilate the spaces and bring required outdoor air into the ceiling space which is used as a return air plenum for the fan coil units. The basement mechanical room is ventilated to remove heat associated with steam converter and other equipment in the mechanical room.

Cooling: The systems serving the building are by and large the fan coil units cooling coils piped in zones or circuits distributed by a header system in the basement. The fan coils supply air into the space and return up into the ceiling space as a return air plenum. A dedicated make-up air unit, and in some cases fan coil units condition 100 percent outdoor air to replenish the exhaust air associated with restrooms.

Table B.12 provides a schedule of the available mechanical equipment installed at Hadley Hall.

Table B.12. Building HVAC Schedule

Equipment Qty. Rating Service FCU 69 0-600 CFM First Floor CHWP 2 7.5 / 300 / 70 HP / GPM /Ft. hd. HW Loop HWP 1 5 / 200 / 40 HP / GPM /Ft. hd. CHW Loop HE 1 240 / 240 GPM / PPH HW Loop Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil PPH = pounds per hour

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Lighting Systems

The predominant lighting used throughout Hadley Hall includes:

• Offices- 2x4 4 lamp prismatic and paracube lay-in fixtures • Exterior – Metal halide decorative wall mount fixtures and ground mount floods.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Vending machines and water fountains are located in the hallway. Detailed plug load survey results are available in the technical appendix.

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Building 184 – Breland Hall

Year 1954, 1975

Square Feet 95,313

Floors 4

Building Description Breland Hall was constructed in 1954 and originally designed to be a residence hall. In 1975 it was remodeled and north and south additions were joined to the existing structure. The College of Arts and Sciences offices, faculty offices, classrooms, and laboratories now reside in the facility. Typical building occupancy at facility is approximately 872 staff and students daily during the spring and fall semesters; low-use and a decrease in building occupancy is observed during the summer session.

The original building consists of three floors above ground with one floor below grade. The envelope has 12” steel reinforced concrete foundation walls, with a painted stucco exterior finish. The floors are slab- on-grade with finishes of carpet, tile, and linoleum. The interior walls are smooth with a painted finish. The center section of the 1954 structure has a pitched roof with clay tile and wood sheathing over un- insulated attic space. The remainder of the roof area is flat, with asphalt sheeting over a built-up roofing system and a perimeter of clay terracotta tile. The ceilings are acoustic lay-in panels on a t-grid suspension system. The windows have operable panels, fixed sashes, metal frames, single-pane, clear glazed glass, and no thermal breaks. The entrances have steel doors fitted with fixed glass panels mounted in hollow steel frames. Interior doors are a mixture of metal and wood construction mounted in hollow metal frames.

The 1975 north and south additions are single-story with an envelope of 12” steel reinforced concrete foundation walls and a 4” reinforced concrete slab. Exterior walls are steel reinforced CMU with a painted stucco finish. A below grade mechanical basement allows access to the University utility tunnel system. Interior floors are finished with carpet and linoleum tile. The roof areas are flat with asphalt sheeting over a built-up roof system, on rigid insulation and steel decking. The interior walls are ⅝” gypsum board with a painted finish over 6” metal studs. An aluminum t-grid ceiling suspension system with acoustic lay-in panels is installed in the interior spaces under an engineered ceiling system. Windows

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installed in the south addition are tinted ¼” plate glass in metal frames. The entrances to the additions have insulated hollow steel doors with ¼” tempered bronze wire glass panels mounted in metal frames. Frames have ¼”glass windows.

The energy management system was upgraded in 1981. ADA accessibility compliance was completed in 1998.

HVAC Systems

The HVAC systems serving Breland Hall were installed in 1975 with the remodel and addition project that added the north and south spaces to the original U shaped structure. A very effective design was put in place which included a large double-duct air handling system serving terminal units in the new south spaces, a multi-zone unit for the administrative spaces in the north addition complimented by four-pipe fan coils units throughout the dorm areas and all areas not served by either of the two big air handlers. With exceptions of chilled water bypass, cold deck and hot deck/duct, the building remains pneumatically controlled at the air handler and space levels. The constant volume terminal units only use one damper actuator. Remnants of Siecor, Tridium, Schneider, and TAC DDC devices remain in the system. The chilled water (re-circulating) bypass and the major cooling and heating coils are under local DDC.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with pneumatic steam valves modulated to control hot water supply temperature to the heating coils serving the air handlers. The 1975 design included four hot water pumps. The hot water supply temperature setpoint is reset close to 180ºF when the outdoor air temperature is 20ºF and at 90ºF OAT the reset is 100ºF.. Space heating is accomplished by the hot water coils in the main air handlers and fan coil units. Some vestiges of old hot water convectors remain in the basement storage areas.

Ventilation: Exhaust - Facility has several wall-, roof-, and ceiling-mounted exhaust fans and both the double-duct and the

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multi-zone unit have full economizer capabilities and are equipped with exhaust/relief fans.

Cooling: The hydronic cooling is provided by typical central plant tertiary pumping configuration, with a throttling control valve controlling the return chilled water temperature to a setpoint of approximately 58ºF. The chilled water pumps do not have a redundant back-up pump nor are they equipped with VSDs. Space cooling is accomplished at the air handler unit and fan coil unit cooling coils, which have pneumatic chilled water control valves. Free cooling is obtained with economizer mode of the air handlers. The boxes have only one pneumatic actuator and may have some overlap.

Table B.13 provides a schedule of the available mechanical equipment installed at Breland Hall.

Table B.13. Building HVAC Schedule

Equipment Qty. Rating Service AHU1 1 32800 CFM Supply AHU2 1 28000 CFM Return AHU3 1 8800 CFM Return AHU4 1 9700 CFM Supply MZ FCU 141 400 CFM 4-Pipe FCU 21 600 CFM 4-Pipe FCU 7 800 CFM 4-Pipe M-1 (Mixing Box) 16 1750 CFM M-2 (Mixing Box) 4 1100 CFM M-3 (Mixing Box) 3 800 CFM M-4 (Mixing Box) 1 450 CFM Converter (Htg.) 1 64,200 / 420 PPH / GPM P11 1 15 / 630 /59 HP / GPM /Ft. hd. CHW P12 1 7.5 / 390 /45,12 HP / GPM /Ft. hd. CHW P13 & 14 2 5 / 150 /49 HP / GPM /Ft. hd. HW P15 & 16 2 7.5 / 270 /54 HP / GPM /Ft. hd. HW HX10 420 / 4200 GPM / PPH EF 1 1640 / ⅓ CFM / HP In-Line EF 1 3000 / 0.75 CFM / HP In-Line EF 1 1640 / ⅓ CFM / HP In-Line EF 1 1070 / 0.25 CFM / HP Roof EF 1 350 / 0.5 CFM / HP Roof EF 1 5500 / ⅙ CFM / HP Roof EF 1 120 / - CFM / HP Ceiling EF 1 1000 / 0.5 CFM / HP Acid / Explosion Proof Notes: CHW = chilled water coil

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CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout Breland Hall includes:

• Classrooms / Labs – 4 lamp T8 prismatic and paracube fixtures along with incandescent can fixtures. • Offices / Conference Rooms – 2, 3, and 4 lamp T8 lay-in and surface box fixtures. • Hallways – 2 lamp T8 surface box fixtures and 4 lamp T12 lay-in fixtures. • Restrooms – 2 lamp T8 wrap and surface box fixtures • Exterior – CFL PL surface fixtures and high pressure sodium wall pack fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. Some classrooms have a projection system mounted in the ceiling. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Detailed plug load survey results are available in the technical appendix.

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Building 187 - Chemistry Building

Building Description

The Year 1955, 1967, 1995

Square Feet 115,878

Floors 3 Chemistry Building houses the Chemistry Department offices, instructional and research laboratories, and classrooms. The building includes four structures, two of which were constructed in 1995. The remaining two were constructed in 1955 and 1967.

The original building was constructed in 1955, and is a two- story structure. Its building envelope consists of concrete block exterior walls finished in stucco, both slab-on-grade and stem-wall foundations, and a steel deck and metal truss roof structure supporting a 3” concrete roof deck, rigid insulation, and light gray asphalt sheet. The south façade includes a two- story single-pane aluminum framed glass curtain walls. This section houses large lecture halls, lab classrooms, offices, classrooms, and storage facilities.

An addition was constructed in 1967, adding a basement and three stories of graduate laboratory, office, and shop space. The 1967 addition consists of a basement with 12” thick poured concrete foundation walls, concrete block exterior walls finished in stucco, a concrete tee roof structure supporting a lighting concrete cap under rigid insulation, and light gray asphalt sheet.

The most recent additions were constructed in 1995, and consist of two structures; a single-story laboratory and lecture hall building, and a three-story laboratory facility with a basement mechanical equipment area. Its envelope includes steel frame exterior walls with R-19 batt insulation and stucco finish over ⅝” drywall. The basement foundation walls are 16”

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reinforced concrete with a 6” reinforced concrete slab-on-grade. The roof consists of steel trusses supporting a steel deck covered with ⅝” plywood, 30-lb felt and ceramic tile.

HVAC Systems

Chilled water is provided to the 1995 building by the campus loop and hot water is generated from steam-to-hot water heat exchangers with steam from a campus loop. The chilled water and hot water pumps are variable voulume and are equipped with VFDs. These pumps, located in 1995 laboratoty wing basement, also distribute chilled and hot water to the 1955 building rooftop AHUs and reheat coils via underground piping.

The 1955 building is served by multiple systems including rooftop-mounted dual-duct VAV systems, and 1995 single-duct VAV reheat systems. The south classrooms, common areas, and offices are served by two rooftop dual-duct VAV systems with chilled water coils, hot water coils, and full economizer capability. All of the 1955 HVAC systems are equipped with DDC controls.

The 1967 building is served by a single-duct constant volume reheat AHU. The AHU has a single supply fan and is a 100 percent outdoor air unit, with no heat recovery. The 1967 building has dedicated variable volume chilled water and hot water pumps, each equipped with VFDs. Exhaust for the 1967 building is provided by large rooftop-mounted exhaust fans. The AHU, pumps and exhasut fans have been retrofitted with DDC controls, while the zone temperature controls are pneumatic.

Both of the 1995 buildings are served by four variable air volume AHUs located in the 1995 laboratory wing basement. These AHU systems are single-duct, hot water reheat systems with VFD equipped supply fans, zone VAV terminal units, and provide 100 percent outside air. The AHUs share a common outside air intake, with a preheat steam coil installed, but werenot in use at the time of the site visit due to a frozen coil. These AHUs are also equipped with an air wahser and face and bypass dampers. In addition, the systems share common VFD equipped exhaust fans, also located in the laboratory wing basement, and utilize heat pipe heat recovery coils. One of the AHUs, and the exhaust fans also serve the 1955 building, excluding the south classrooms, common areas, and offices. Air is distributed to both the single-story 1995 building and the 1955 north and east labs building by air ducts in underground tunnels. A bridge connecting the 1995 laboratory building with the 1967 building is served by a dedicated AHU with a constant speed fan and a hot water heating coil. All of the 1995 HVAC units are equipped with DDC controls.

The labratories are equipped with fume hoods and the 1995 AHUs utilize exhaust system deficit dampers to maintain stack velocities.

An additional air-cooled packaged heat pump unit provides supplemental cooling to the single-story 1995 section lecture hall.

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The following table provides a schedule of the primary mechanical equipment installed at the Chemistry Building.

Table B.14. Building HVAC Schedule

Equipment Quantity Rating Service AHU-1, 2, 3, 4 Supply 4 35,000/6.0/50 CFM/SP/HP 1995 Additions, 1955 Fans 4 1,517 MBH CHW Coil AHU-5 Supply Fan 1 3,400/2.8/3 CFM/SP/HP 1995 – 1967 Bridge 1 131 MBH HW Coil Lab Exhaust Fans 10, 11 2 70,000/6.0/100 CFM/SP/HP 1995 Additions, 1955 AHU 8A, 8B Supply Fans 2 8,400/3.5/10 CFM/SP/HP. 1955 South Commons, Classrooms, and Offices 2 255 MBH CHW Coil 2 259 MBH HW Coil AHU-1 (1967) Supply Fan 1 47,000/1.95/25 CFM/SP/HP 1967 Addition Lab Exhaust Fans (1967) 5 0.75 –3 HP 1967 Addition 2,480 – 9,200 CFM 0.35 – 2.1 IN. WC Chilled Water Pumps 2 480/45/7.5 GPM/FT/HP 1995 Addition, 1955 (1995) Hot Water Pumps (1995) 2 375/80/10 GPM/FT/HP 1995 Additions, 1955 Chilled Water Pump 2 555/33/7.5 GPM/FT/HP 1967 Addition (1967) Hot Water Pump (1967) 1 102/18/1 GPM/FT/HP 1967 Addition

Notes: CHW = chilled water coil

HW = hot water

FT = Feet of head

SP = inches of water column

GPM = gallons per minute

CFM = cubic feet per minute

HP = horsepower

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Lighting Systems

The predominant lighting used throughout Chemistry Building includes:

• Classrooms – A mix of fixtures were identified in the classrooms – 2 lamp T8 and T12 surface box fixtures, 2 lamp T8 prismatic and parabolic lay-in fixtures, 3 lamp T12 surface box fixtures, 3 lamp T8 lay-in fixtures, 3 lamp T8 Indirect fixtures along with 4 lamp T8 and T12 lay-in fixtures. Also identified were 4 lamp T8 wide wrap fixtures and LED can fixtures. • Offices/Conference Rooms - – 2 lamp T8, T12 wrap and surface box fixtures, 2 lamp T8 prismatic and parabolic lay-in fixtures, 3 lamp T12 surface box fixtures, 3 lamp T8 lay-in fixtures, 3 lamp T8 Indirect fixtures along with 4 lamp T8 and T12 lay -n fixtures. Also identified were 4 lamp T8 wide wrap fixtures. • Hallways – 2 lamp T12 surface boxes and lay-in fixtures, 2 lamp T8 and T12 wrap fixtures and 4 lamp T8 and T12 lay-in and wrap fixtures. CFL PL can fixtures were also identified. • Restrooms – 2 lamp T8 and T12 vanity fixtures and CFL PL can fixtures. • Exterior – Metal halide recessed canopy fixtures and incandescent recessed fixtures.

Plug Load Equipment

There is a wide variety of plug load equipment in use in the building. Offices contain typical office equipment including computers and monitors, copy machines, and coffee makers. Classrooms and lecture halls include projection and other audio/visual presentation equipment. Laboratories include a dense concentration of scientific processing and analytical devices, in addition to typical office equipment.

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Building 225 – Astonomy Building

Year 1959

Square Feet 15,486

Floors 2

Building Description Constructed in 1959, the building serves the NMSU Astronomy Department and houses office space for faculty, research associates, administration staff and graduate students. Typical building occupancy at the department consists of approximately 15 students daily during spring and fall semesters; low use with a considerable decrease in building occupancy during the summer session. The building consists of two floors above ground with a partial basement floor below grade. The envelope is steel reinforced concrete foundation walls, precast concrete unit walls with painted stucco exterior finish. The floors are slab-on- grade with lenoleum tile flooring. The interior walls are primarily CMU block with painted finish. The roof area is flat with asphalt sheeting over a built-up roofing system and shows a perimeter of clay terracotta tile. The ceilings are acoustic lay-in panels on aluminum t-grid system. The four segment windows have one operable panel, fixed sashes, metal frames, single-pane glazed glass, and no thermal breaks. The energy management system was upgraded in 1981. ADA renovations were completed in 2007 and 2009 with an elevator installation in 2008.

HVAC Systems

The HVAC systems at the Astronomy Building are combinations of mixing boxes served by a chilled water/hot water double-duct AHU located in the basement and individual fan coil units for portions of the interior space. A Mitsubishi split system conditions a computer server room. The air handler is still primarily under pneumatic control. The cold duct has been converted to DDC with a two-way DDC valve. The hot duct is under pneumatic control. The chilled and hot water plants are connected to the automation system. The mixing boxes are under pneumatic control and the fan coils run wild with

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occupant control of the fan speed. The mixing boxes have local pneumatic control and appear to be set up for constant volume operation. The air handler fan does not have inlet vanes, nor is it on variable speed drive. In some areas, a relatively large supply plenum (in ceiling) has been constructed with dampers and pneumatic damper actuators on the space duct feeds. These plenum boxes have individual duct taps for multiple runs out to supply diffusers serving the spaces. The building drawings showing the box and fan coil unit locations are not yet, available. Inquiries are pending with the Thermal Corporation on the design information of the air handling unit. The potential of this system is in the presence of two separate damper actuators on the mixing boxes; thus, conversion to true variable air volume and air handler speed control on static pressure is much more cost effective.

Heating for space conditioning is provided by the steam-to-hot water converter supplying hot water to the hot duct coil in the air handler. The fan coil units are believed to be single coil (cooling only) configuration.

Ventilation is provided, at times, by the economizer sequence and a minimum outdoor air when the economizer is not active. A roof-mounted exhaust fan above the photo lab provides exhaust for the building and additional exhaust fan(s) serve the restrooms in the southwest corner of the first and second floors.

The mixing box sequence appears to be set up as a constant volume arrangement with overlap of the cold and hot duct being inherent in the sequence.

Cooling with chilled water provided by the central plant and has the typical chilled water bypass valve line with a check valve installed to provide tertiary chilled water pumping for the building. The chilled water pumps are not on VSD. The cold duct of the air handler served by cooling coil within the air handler has been equipped with a local DDC two-way control valve on a local TAC control. An electronic sensor is on the cold duct discharge. Local pneumatic mixed air control to a 55ºF setpoint is locked out above 75ºF outdoors. Free cooling is obtained from outdoor air during times outdoor air is below 75ºF. Table B.15 provides a schedule of the available mechanical equipment installed at the Astronomy Building.

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Table B.15. Building HVAC Schedule

Equipment Qty. Rating Service AHU 1 12,800 CFM All Floors FCU 3 200 CFM All Floors MB 15 265 CFM All Floors HX 1 130 / 1300 GPM / PPH AHU P-1 2 2 / 130 / 33 HP / GPM /Ft. hd. CHW Loop P-2 1 2 / 130 / 33 HP / GPM /Ft. hd. HW Loop EF 1 1520 CFM Building EF 1 400 CFM Restrooms EF 1 150 CFM Elevator Notes:: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout the Astronomy Building includes:

• Offices – 2x4 4 lamp prismatic lay-in fixtures are most prevalent. • Hallways – 2x4 4 lamp prismatic lay-in fixtures. • Exterior – High pressure sodium canopy and wall pack fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Detailed plug load survey results are available in the technical appendix.

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Building 244– Gerald Thomas Hall

Year 1963

Square Feet 139,950

Floors 3

Building Description

Gerald Thomas Hall houses the College of Agriculture and Home Economics. It includes a wide variety of functional spaces including classrooms, offices, laboratories, teaching kitchens, and a small snack bar and restaurant. The building was originally constructed in 1963, with a west end addition completed in 1967 and numerous interior renovations completed through 2009.

The building includes roughly 140,000 sf. with three floors above ground with a basement located air handling unit adjacent to campus utility tunnels. The envelope consists of 12” steel reinforced concrete foundation walls, 8” un-insulated concrete masonry unit walls with cement stucco exterior finish and painted interior finishes. The windows are inoperable single-pane, aluminum frame units with no thermal breaks. The roof is flat, with asphalt and gravel over 2 layers of ½” rigid insulation, 4” of lightweight concrete, and 3” of precast concrete tee.

HVAC Systems

The space conditioning systems at Gerald Thomas Hall include three AHUs, each with steam heating coils and chilled water cooling coils. Auxiliary direct-expansion (DX) split system cooling, and cooling only two-pipe fan coil units provide additional cooling for selected spaces. Steam and chilled water are sourced from the central utility plant via campus distribution loops.

The original building is conditioned by a built-up basement AHU

and a rooftop-mounted AHU at the east end of the building. Both AHUs are constant volume, dual-duct units with hot deck

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steam coils and cold deck chilled water coils. The basement AHU has three supply fans each of which have variable frequency drive (VFD) controlled standard efficiency motors. One of the three fans (the center fan) remains in place but has been removed from service and it is not connected to electrical power. The rooftop AHU is equipped with a single high efficiency supply fan with inlet guide vanes and two relief fans. Both units have full economizer capability, and DDC over pneumatic actuators. The zones served by these units have constant air volume, dual-duct mixing box terminal units with stand- alone pneumatic controls.

The 1967 addition is conditioned by a rooftop AHU at the west end of the building, which is similar to the east end RTU, with constant volume supply and relief fans, hot and cold decks, and DDC AHU controls over pneumatic field devices. The supply and relief fan motors are standard efficiency. The zones also have dual-duct mixing boxes with stand-alone pneumatic controls. A 2005 remodel of the first floor included the addition of kitchen hood and two natural gas fired make-up air units (MAU) with direct evaporative cooling to serve a new commercial cooking training kitchen.

Chilled water for the Gerald Thomas Hall cooling systems is provided by the campus central chilled water loop. Chilled water is distributed to these systems by constant volume chilled water pumps with a dedicated pump for each AHU.

A number of rooftop- and wall-mounted exhaust fans serve food service kitchen, kitchen classroom, and a small number of laboratory fume hoods.

Domestic hot water is provided by a steam-to-hot water heat exchanger located in the utility tunnel, and additional hot water storage tanks with electrical resistance heating located in a third floor mechanical room.

At the time of the site visit, each of the three air handling units at Gerald Thomas Hall showed various levels of operational or control issues. For example, the relief fans on the east and west air handling units had missing fan belts and the pneumatic actuators controlling the mixed air dampers were not working correctly. Control valves for the basement AHU’s chilled water and steam valves were not working correctly and the pneumatic actuators for the mixed air dampers were not functioning. These issues represent retro-commissioning opportunities.

The following table provides a schedule of the available mechanical equipment installed at Gerald Thomas Hall. Note that the design drawings do not provide any design capacity information.

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Table B.16. Building HVAC Schedule

Equipment Quantity Rating Service Basement AHU Fans 2 50 HP 1963 Section East Rooftop AHU Fan 1 30 HP 1963 Section West Rooftop AHU Fan 1 20 HP 1967 Western Addition Basement AHU Chilled 1 445/45/7.55 GPM/FT/HP Basement AHU Chilled Water Coils Water Pump East Rooftop AHU 1 150/65/5 GPM/FT/HP East AHU Chilled Water Coil Chilled Water Pump West Rooftop AHU 1 160/70/5 GPM/Ft/HP West AHU Chilled Water Coil Chilled Water Pump Notes: HP = horsepower MBH = 1,000 BTU per hour GPM = gallons per minute FT = feet of head CFM = cubic feet per minute (air)

Lighting Systems

The predominant lighting used throughout Gerald Thomas Hall includes:

• Classrooms – 2 lamp wrap fixtures, 2x4 3 lamp T8 prismatic and parabolic fixtures and 2x4 4 lamp T12 prismatic fixtures.

• Hallways – 2 lamp wrap fixtures and 2 lamp T8 paracube fixtures.

• Offices – 2 lamp wrap fixtures, 2x4 3 lamp T8 prismatic and parabolic fixtures, 2x4 4 lamp T12 and T8 prismatic fixtures, and 4 lamp wrap fixtures.

• Restrooms – 2 and 4 lamp wrap fixtures.

• Exterior – High pressure sodium wall pack fixtures.

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Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat screen monitor and a printer. Laboratories are equipped with a wide variety of test and measurement instruments and test fixtures. Kitchen classrooms have multiple electric ranges, ovens, refrigerators, and other culinary equipment. The snack bar has commercial cooking equipment including electric broilers, fryers, hot storage, and commercial coffee brewer. Other plug loads including copiers, fax machines, water coolers, and vending machines are in use.

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Building 246 – Small Animal Research Lab

Year 1962

Square Feet 2,278

Floors 1

Building Description

The Small Animal Research Lab serves the College of Agriculture and Home Economics. The exterior walls are comprised primarily un-insulated 8” CMU with a stucco finish. The floor is concrete slab-on-grade. The roof surface is a reflective white spray-on foam material approximately 3”in thickness. There are no windows. This building includes laboratory rooms, offices, and storage rooms. It appeared to have intermittent occupancy at the time of the site visit, yet did not appear to be used on a frequent basis. There were no design drawings or specifications available for this facility.

HVAC Systems

The HVAC systems at the Small Animal Research Lab are served from the central plant steam system. The building does not utilize chilled water from the central plant and is not air conditioned. Cooling is provided by six evaporative coolers located on the roof of the building.

There is no hot water converter for this building. The air handling unit is equipped with a steam heating coil only. Domestic hot water is provided by a single 30-gallon, 4.5-kW, electric water heater.

There is one air handing unit located in the building’s south mechanical room. This unit is a three-zone, constant volume, multi-zone air handling unit with a steam coil and no chilled water coil. It is pneumatically controlled and is equipped with mixed air dampers. There is no design data available for

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this building or its mechanical equipment. Additionally, there was no nameplate available on the standard efficiency fan motor; however, our best estimate is that it is about 5-HP. The air handling unit was in fair condition; however, at the time of the site visit the outside air dampers were fully open while the unit was off, suggesting the control sequence is not working correctly for the mixed air sequence of operations.

The Small Animal Research Lab is controlled by pneumatic controls. The building is not on the campus Niagara system.

Lighting Systems

The predominant lighting used throughout Small Animal

Research Lab includes:

• Lab – CFL fixtures and 2 and 4 lamp wrap type fixtures. • Exterior – High pressure sodium wall pack fixtures.

Plug Load Equipment

There were no significant plug loads found in this building.

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Building 248 – Regents Row

Year 1961, 2006

Square Feet 82,386

Floors 2

Building Description Regents Row was constructed in 1961 as a student dormitory and currently houses academic advisory offices. The 70-plus room facility is a two-story above ground building. The envelope consists of 12” steel reinforced concrete foundation and 8” un-insulated concrete unit walls with a painted, cement stucco exterior finish. The floors are slab-on-grade with carpet finishes. The interior walls are gypsum board over metal framing studs. The roof has a slight pitch with asphalt and georock gravel over a poured gypsum roof deck and gypsum form board. A t-grid suspension system and acoustic ceiling tiles are installed in the interior spaces over full thick batt insulation and fire code 60” sheetrock. The windows have metal frames, one operable panel, single-pane glazed glass with shades, and no thermal breaks. The building entrances have insulated hollow metal doors frames mounted to hollow frames. Interior doors are wood with a hollow metal frame.

In 2006, the two-story Roberts Building added over 6,000 sf. to the complex. The facility accommodates the University Communication and Marketing Services Department. The envelope consists of 12” steel reinforced concrete foundation with 8” un-insulated concrete unit walls with a painted, cement stucco exterior finish. The floors are slab-on-grade with carpet and linoleum tile. The interior walls are gypsum board over metal framing studs. The roof has a slight pitch with asphalt and gravel over a built-up roof system. A t-grid suspension system and acoustic ceiling tiles are installed in the interior spaces. The windows are pre-finish aluminum frames, insulated glazing with shades, and no thermal breaks. The building entrances have insulated hollow metal doors frames mounted to hollow frames. Interior doors are primarily hollow metal doors and frames.

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HVAC Systems

The HVAC systems serving Regents Row were originally installed in 1961. In 1977 the system was modified to abandon the two packaged chillers/cooling tower and connect it to the central system. In 2006, in Building 6 (Coaches Building/Roberts) the fan coil units were refurbished and a few new exhaust fans were installed. The system was originally designed with its own chillers and steam from the plant. The complex is comprised of the H shaped part of Building 6 which was not architecturally connected. In addition a small building was included (Equipment Building) to house the steam-to-hot water converter and the domestic hot water tank with internal heat exchanger. The equipment room in Building 3 contained the packaged chillers, condenser water pump, heating water pump, chilled water pump, and six-zone pumps. Single coil fan coil units were installed in individual rooms within the buildings and these operated as a two-pipe system. Each zone pump was dedicated to a part of a building, but the system switched over as a whole and either chilled water or hot water was available to all fan coil units in all buildings. There were two manual return changeover valves and two manual supply changeover valves installed to manually switch the system over. The cooling tower has been removed and the packaged chillers were abandoned in-place. In 2006, a Project for Building 6 was completed which addressed architecture, plumbing, acoustic, and some refurbishment of the fan coils in Building 6. The complex is a prime candidate for a digital automatic switchover system although this could conceivably increase energy consumption. Occupant comfort would definitely be improved.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with a large top pneumatic steam valves modulated to control hot water supply temperature to the heating coils The hot water supply temperature setpoint is reset via pneumatic controls, most likely something close to 180ºF when the outdoor air temperature is 20ºF and at 85ºF OAT the reset is 120ºF. Space heating is accomplished by the two- pipe fan coil units in the individual rooms and areas. Domestic hot water is generated with a combination storage/water to water heat exchanger in the equipment building. A small circulating pump serves the domestic circuit. The main hot water pump is in the Building 3 equipment room. When the manual valves are so positioned, heating hot water is pumped, by zone, out to the fan coil unit’s coils. The thermostats have to be manually switched to heating by the occupant in order to cycle the fan motor at the proper times.

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Ventilation: Exhaust was originally designed to be done by small (200 CFM) wall exhaust fans which pulled air through the operable windows. There are return grills in the wall near the back closet to be sure return air can get to the FCU installed at the top of the closet. There is a utility space running down the center of each building, and it is vented via wall louvers however, this is not the ventilation path -the operable windows and the code allowed ventilation to be accomplished in this manner. The first and second floor of Building 6 had some ceiling exhaust fans removing air through roof vents. The 2005 project for Building 6 modified the exhaust systems and strategically added some exhaust capacity.

Cooling: The systems serving the building currently are the two-pipe fan coil units previously installed. The plant for the Regents Row complex of buildings obtains chilled water from the central plant and the typical chilled water bypass valve arrangement was installed in a 1977 project by the Physical Plant Department The original chilled water pump was replaced and a flow control valve was installed. When the system is (manually) switched over to cooling, chilled water is pumped by individual zone/building pumps to the single coil fan coil units in the buildings. These coils run uncontrolled and the thermostats are equipped with a switch for the occupant to select which mode (heat or cool) their system is in, which is required so the fan cycles on and off at the appropriate times.

Table B.17 provides a schedule of the available mechanical equipment installed at the Regents Row complex.

Table B.17. Building HVAC Schedule

Equipment Qty. Rating Service FCU 208 200-600 CFM First and Second Floors Z-1 1 1.5 / 52.4 / 33 HP / GPM /Ft. hd. Building 1 Z-2 1 1.5 / 52.7 / 33 HP / GPM /Ft. hd. Building 2 Z-3 1 1.5 / 73.2 / 23 HP / GPM /Ft. hd. Building 3 Z-4 1 1.5 / 52.1 / 33 HP / GPM /Ft. hd. Building 4 Z-5 1 1.5 / 52.5 / 33 HP / GPM /Ft. hd. Building 5 Z-6 1 2 / 72.9 / 44.6 HP / GPM /Ft. hd. Building 6 HX (C-1) 1 247 / 2470 GPM / MBH Complex DHW 1 20 / 1000 GPM / MBH Complex Main Pump 1 15 / 360 / 88 HP / GPM / Hd All Buildings Notes: CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute

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HP = horsepower MBH = 1,000 BTUH

Lighting Systems

The predominant lighting used throughout the Regents Row facilities includes:

• Offices – Offices 2 lamp 13w CFL drum fixtures along with 2 and 4 lamp T8 wrap fixtures. • Restrooms – 13w CFL vanity fixtures and 2 lamp 13w CFL box fixtures. • Exterior – The exterior was mostly 15w CFL Jelly Jar fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with lat screen monitors and printers. Some rooms have a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Detailed plug load survey results are available in the technical appendix.

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Building 251 – Natatorium

Year 1961, 1970

Square Feet 15,421

Floors 1

Building Description

The Natatorium, also known as the Aquatic Center, contains an Olympic-size outdoor pool and a 15-by 25-yard indoor pool. Both pools are heated and open for use year-round. Functional spaces at the Natatorium include locker rooms, dressing rooms, lobbies, offices, showering and toweling areas, and restrooms. Typical building occupancy at the Natatorium consists of approximately 70 students daily during spring and fall semesters. Summer season varies because the Natatorium offers many public swimming classes and lessons. The hours of operation for the Natatorium are Monday through Friday from 6am to 9pm, Saturday from 7am to 7pm, and Sunday from 12pm to 5pm.

The building was originally constructed in 1961 and only included the indoor pool. In 1970, the outdoor pool was constructed. The outdoor pool is covered during periods when the pool is heated, the indoor pool has no cover. The building envelope of the Natatorium is comprised of steel reinforced CMU walls, concrete and paper fill, and a tan painted exterior stucco finish. The majority of the interior walls are painted concrete block. The ceilings of the building area are acoustical panels. The pool area has 3” cedar laminated deck ceilings. Windows at the building vary from single-pane fixed, awning, or roll up style with either clear or opaque glass. The floors are a mixture of concrete and ceramic tile. The roof of the building area is flat, gray; asphalt sheeting over a built-up roofing system on poured gypsum roof decking. The pool area of the building is pitched with white PVC membrane over 1 and ⅝” roofmate styrofoam insulation on top of 6” steel decking.

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There are numerous pumping and cleaning equipment for the pool associated with the Natatorium along with an extensive controls system. NMSU has installed a Stantrol controls system for automatic chemical balancing of both their indoor and outdoor pools. As part of this system, there are two large US Filters high-efficiency sand filters for the indoor pool and five large US Filters high-efficiency sand filters for the outdoor pool. The outdoor pool uses a 50-HP motor for its supply circulation pump with the indoor pool using a 20-horsepower

motor unit. There are also multiple chlorine injectors and a co2 injector present in the pool equipment room. Each has a small pump and motor associated with it. There are two auxiliary 7.5- and 5- HP pumps that aide in the pool pumping process.

HVAC Systems

The space conditioning at the Natatorium is heating only. The original building had a single fan coil unit in the mechanical room which provided the offices and locker rooms with heating. The original source of heating for the indoor pool area was supplied by seven hot water supplied wall-mounted heaters surrounding the pool. At some point, the unit heaters were removed and in 1993, a mechanical improvement was done to the Natatorium to improve the space conditioning system currently in place. A new 100 percent outdoor air direct natural gas fired make-up air heater was installed on the east roof of the building. The make-up air unit is never shut off and is only switched from economizer mode to heating mode. There is one supply ductwork and one exhaust duct which is exhausted out of the building using a large 10-HP standard efficiency exhaust fan on the roof. Two large portable evaporative coolers are brought into the indoor pool area when temperatures get warm. On the roof were additional small exhaust fans, hoods and two small swamp coolers that serve the office and locker room areas.

The mechanical room is located ground level on the outside of the building. It has two steam-to-hot water heat exchangers. One for pool heating and one for space heating. There is a single fan coil unit with heating coil with a two-way control valve on a supply pipe that is not insulated. There are two-way steam valves for domestic hot water which are also missing pipe insulation.

There is no chilled water at this building. Hot water for the Natatorium is provided by steam-to-hot water heat exchangers. A hot water generator is used to transfer heat from steam to the building’s hot water system. Condensate is returned to the central plant via an automatic steam trap, and a condensate return unit.

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The Natatorium is equipped with a TAC Xenta DDC system and pneumatic controls. This system is used to control the pool heating and pump systems, as well as the large exhaust fan on the roof. The building’s DDC system is connected to the campus Niagara system over the wide area network.

Table B.18 provides a schedule of the available mechanical equipment installed at the Natatorium.

Table B.18. Building HVAC Schedule

Equipment Quantity Rating Service FCU-1 1 2950 / 0.25 / 19 CFM / SP / GPM Fan Coil Unit MAU-1 1 17200 / 1.1 / 15 CFM / SP/ HP Make-Up Air Unit EF-1 1 18000 / 0.44 / 10 CFM / SP / HP Ducted Return/Exhaust Fan Supply Pump 1 750 / 65 / 20 GPM / Ft. hd./ HP Indoor Pool Circulation Pump Supply Pump 1 2250 / 65 / 50 GPM / Ft. hd./ HP Outdoor Pool Circulation Pump Notes: HP = horsepower GPM = gallons per minute Ft. hd. = feet of head CFM = cubic feet per minute (air) SP = static pressure in inches

Lighting Systems

The predominant lighting used throughout the Natatorium includes:

• Indoor Pool – 1000w Metal halide flood fixtures. • Locker Rooms – 2 lamp T8 weatherproof wraps. • Offices – 2 lamp T8 and T12 strips and wraps. • Outdoor Pool / Deck – 1000w Metal halide Musco sports lighting along with metal halide wall packs, metal halide post top fixtures and incandescent recessed soffit lighting.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat screen monitor and a printer. As noted earlier, a variety of commercial pool cleaning equipment and products are in place. Other plug loads including scoreboards, water coolers and vending machines are in use. Detailed plug load survey results are available in the technical appendix.

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Building 261 Student (Campus) Health Center

Year 1965, 1969, 2000, 2010

Square Feet 19,964

Floors 1

Building Description

The original building was constructed in 1965 and accommodated a U.S. Post Office and the Student Health Center. Additions were added to the single-story facility in 1969 and 2000. The original 1965 single-story structure includes over 6,100 sf with one above ground floor. The envelope consists of 12’ steel reinforced concrete foundation footers, 4” steel reinforced concrete foundation slab, and un- insulated concrete masonry unit walls with a painted cement stucco exterior finish and painted interior walls. The floors are slab-on-grade with carpet and linoleum tile finishes. The roof area is flat, with asphalt sheeting over a built-up roofing system consisting of 2” pour gypsum deck, ½’ gypsum form board and reinforced mesh. The painted stucco mechanical dormer has a pitched roof with asphalt shingles. An aluminum t-grid ceiling suspension system with acoustic lay-in panels is installed over an engineered ceiling system and full batt insulation. The windows are inoperable with metal frames, single-pane clear glass with shades, and no thermal breaks. Window screens appear on the west exposures. The building entrances have steel door frames and insulated steel doors fitted; the main and rear entry doors are fitted with fixed glass panels. Interior doors are a mixture of wood and steel doors mounted in steel frames.

The 1969 addition added over 4,700 sf to the existing structure. The envelope consists of 12” reinforced concrete foundation, un-insulated concrete masonry unit walls with cement stucco exterior finish and painted interior finish, and precast concrete walls with smooth interior and textured exterior finishes. The windows are inoperable, metal frame units with neutral gray glass and no thermal breaks. The roof area is flat, with asphalt sheeting over a built-up roofing system.

The 2000 addition includes roughly 4,900 sf. The exterior walls consist of metal studs, ½” gypsum sheathing, R-11 batt insulation with an exterior stucco finish. The floors are slab-on-grade with vinyl or carpet finishes. The interior is finished with painted gypsum sheathing. The windows are inoperable

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double-pane metal-framed units with no thermal breaks. The roofing consists of a single-ply membrane roof system over metal decking.

The addition to the facility in 2010 included over 2,300 sf. The envelope consists of a steel reinforced concrete foundation. The structure is comprised primarily of metal stud exterior walls with batt insulation. The exterior finish is stucco on rigid insulation over exterior plywood. Floors are concrete slab-on-grade. The roof surface is a reflective membrane over a built-up roof system on metal decking. Acoustic lay-in panels are installed in a t-grid ceiling suspension system. Windows are insulated fixed glazing with bronze tint.

HVAC Systems

The HVAC systems serving the Student (Campus) Heath Center were replaced as a part of the 1999 addition. Significant portions of previous HVAC system were removed and some portions were salvaged at the University. An efficient hot water/chilled water system serving four-pipe fan coil units was installed with DDC controls clear out to the space control level. Some DX based spot cooling was added to accommodate the Pharmacy for special needs and hours of operation. In 2006 and 2007 a solar shade project was implemented and tied to the Student (Campus) Health Center building’s grid. Changed in the floor plan necessitated relocating mechanical rooms for pumps and connection to the campus chilled water and steam sources. The fan coil units were equipped with automatic outdoor air dampers and actuators.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with DDC actuated steam valves modulated to control hot water supply temperature to the heating coils. The hot water supply temperature setpoint is reset, via pneumatic controls, to something close to 140ºF when the outdoor air temperature is 35ºF and at 80ºF OAT the reset is 80ºF. Space heating is accomplished by the four-pipe/two-coil fan coil units in the individual rooms and areas. Domestic hot water is generated with a combination storage/steam-to-water heat exchanger in the equipment building. A steam source unit heater was installed to prevent freeze damage.

Ventilation: Exhaust is performed by eight exhaust fans totaling over 2,710 CFM with 400 CFM coming out of the mechanical room. The outdoor air supplied to the FCUs total 2,685 CFM for a net positive of 400 CFM. The outdoor air dampers open when the FCU supply fan is energized.

Cooling: The systems serving the spaces within the building currently are the four-pipe fan coil units and two Mitsubishi split systems. The DDC controls modulate the two-way chilled water control valve (three-way at

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end of line) to control space setpoint temperature. There is no economizer/free cooling strategy employed in this building. The typical chilled water bypass/return water control strategy is employed.

Table B.19 provides a schedule of the available mechanical equipment installed at the Student (Campus) Health Center.

Table B.19. Building HVAC Schedule

Equipment Qty. Rating Service FCU* 25 1000-1200 CFM First Floor HE-1 1 38 GPM Heating HE-2 1 - GPM Heating HX 1 24 GPM Heating EF-1 through 9 9 150-840 CFM Exhaust P1A & 1B 1 2 / 87 / 44 HP / GPM / Ft. hd. CWH Loop P-2A & 2B 1 1½ / 36 / 53 HP / GPM / Ft. hd. HW Loop CP 1 1½ / 3 / 45 HP / GPM / Ft. hd. CHWP P1 & 2 1 1½ / 34 / 53.4 HP / GPM / Ft. hd. CHWP P3 & 4 1 2 / 24.5 / 59.5 HP / GPM / Ft. hd. HWP UH-1 1 450 / 24 / 9 CFM / WATTS / MBH Mechanical Room. Notes: AMP = amperes CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil MBH = 1,000 BTU per hour WATTS = watts *Quantities estimated from design drawing

Lighting Systems

The predominant lighting used throughout the Student (Campus) Health Center includes:

• Offices – 2x4 4 lamp T8 and T12 prismatic lay-in fixtures, 4 lamp wrap fixtures, 2 lamp surface box fixtures and 2 lamp T5HO lay-in fixtures. • Hallways – 2x4 4 lamp T8 and T12 prismatic lay-in fixtures, CFL cans and 2 lamp T5HO lay-in fixtures. • Exterior – CFL decorative wall pack fixtures.

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Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, range/oven, and other kitchen appliances. Detailed plug load survey results are available in the technical appendix.

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Building 263 – PSL Clinton P. Anderson Hall

Year 1965 and 1991

Square Feet 135,847

Floors 2

Building Description

PSL Clinton P. Anderson Hall was originally built in 1965 with renovation and additions made in 1991. The Physical Science Laboratory is a non-profit laboratory that provides research, testing, and engineering support for federal agencies. The original structure included the full basement and first and second floor core areas. The 1991 addition and remodel included the east and west wings and the north entry. The 1991 project also included new mechanical systems, building façade windows, and other architectural enhancements.

The exterior walls are primarily 8” concrete masonry units with 1” of rigid exterior polystyrene insulation and stucco finish. The interior wall surfaces are furred with metal studs and insulated with R-11 fiberglass batts. The basement floor is slab-on-grade. Interior floors are precast concrete. The ceilings are of the suspended acoustical system type. The second floor ceiling has R-30 fiberglass batt insulation. The windows are fixed storefront type with 1” insulated bronze glass with metal frames. The roof is a reflective white single-ply membrane system over 2” rigid insulation on a lightweight concrete deck.

This building includes a lecture room, open and executive offices, storage rooms, laboratories, restrooms, mechanical and electrical rooms, and other miscellaneous rooms.

HVAC Systems

The HVAC systems at PSL Clinton P. Anderson Hall are served from the central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water pumps. There are two chilled water pumps in a lead stand-by configuration located in the original basement mechanical room. These pumps are also equipped with an automatic chilled water pump bypass valve. The nameplate flow for each pump is 720 GPM at 40 feet of

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head. Each of the two pumps is powered by a 10-HP high efficiency motor and the pump speed is controlled by VFDs. There are two additional chilled water pumps located in the east basement mechanical room. These pumps are rated at 345 GPM at 68 feet of head. These pumps are also equipped with VFDs connected to 5-HP standard efficiency motors. These pumps do not have a chilled water bypass valve.

A hot water generator is used to transfer heat from steam to the building’s heating water systems to AHU-1 East, AHU-2 West, RTU-3 East and RTU-4 West via two pumps located in the east basement mechanical room. These variable volume pumps are rated at 218 GPM at 55 feet of head and are equipped with VFDs.

Condensate is returned to the central plant via automatic steam traps (APT) and a condensate return unit (CRU).

There are five air handlers located at PSL Clinton P. Anderson Hall. These units are further described as follows:

AHU-0 is the original air handler located in the main building’s basement mechanical room. This unit is a built-up, dual-duct VAV system with a cooling coil, heating coil and a mixed air economizer. There are two supply fans. Each fan has a design rating of 52,870 CFM and is equipped with a 50-HP motor. Fan speed and static pressure are controlled by VFDs. The terminal units for this air handler are DDC controlled and have been converted to pressure independent dual-duct VAV boxes. One unique feature of this air handler is that the hot deck has been equipped with a damper on the supply duct. This enables the hot deck to be completely isolated from mixing when the air handler is operating in cooling mode. This feature helps prevent zone mixing and also results in better fan turn down when the damper is closed. There is a bank of four propeller type relief fans located in the building’s penthouse. These are each equipped with a 1-HP standard efficiency motor and are staged on or off via the AHU-0 control system.

AHU-1 East and AHU-2 West are similar units is located in the east and west basement mechanical rooms. These units are dual-duct VAV systems with single supply and return fans that are controlled by VFDs. Each unit is equipped with a mixed air economizer. The 40-HP supply fans have high efficiency motors.

RTU-3 East and RTU-4 West are similar units that are located over the north entry addition. These air handlers are single-duct VAV units with preheat coils, cooling coils and mixed air economizers. The 20-HP high efficiency supply fans are controlled by VFDs. There is one additional relief fan located on the roof that is equipped with a 7.5-HP fan with VFD speed control.

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All of the building’s mechanical equipment appears to be very well maintained and in good operating condition except the economizer on RTU-4 was not working correctly. The return damper was closed with the unit operating at minimum outside air volume while in cooling mode.

This building is equipped with Schneider/TAC DDC system for operation of the chilled water system, hot water system and each air handler. The DDC system also extends to the zone level on all of the air handlers. At the time of the site visit all but four dual-duct terminal boxes had been converted from pneumatic to DDC controls. Standard DDC functions including equipment schedules, economizer control, hot and cold deck reset, chilled water static pressure control, fan static pressure control, and other sequences are employed.

Table B.20. Building HVAC Schedule

Equipment Quantity Rating Service CHW Pump 2 720/400/10 GPM/FT/HP CHW Loop CHW Pump 2 345/68/5 GPM/FT/HP CHW Loop HW Pump 2 218/55/5 GPM/FT/HP HW Loop AHU-0 Main Basement 1 105,600/4.3/50 CFM/SP/HP 2,760 MBH CHW Coil 3,570 MBH HW Coil AHU-1 East 1 32,098/4.47/40 CFM/SP/HP 251 MBH CHW Coil 953.1 MBH HW Coil AHU-2 West 1 28,507/4.47/40 CFM/SP/HP 284 MBH CHW Coil 877 MBH HW Coil RTU-3 East 1 11,000/4.5/20 CFM/SP/HP 361 MBH CHW Coil 534 MBH HW Coil RTU-4 West 1 11,000/4.5/20 CFM/SP/HP 361 MBH CHW Coil 534 MBH HW Coil Notes: HP = horsepower GPM = gallons per minute CFM = cubic feet per minute FT = static pressure (feet) CHW = chilled water coil HW = hot Water MBH = 1,000 BTU per hour SP = static pressure in inches W.G.

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Lighting Systems

The predominant lighting used throughout PSL Clinton P. Anderson Hall includes:

• Classrooms – 3 lamp T8 dimming lay-in fixtures and incandescent can / track fixtures. • Offices / Conference Rooms – An assortment of fixtures found here include 2 lamp T8 and T12 lay-in, strip and wrap fixtures, 2 lamp T5 lay-in indirect fixtures, 3 lamp T8 and T12 lay-in and wrap fixtures and 4 lamp T12 lay-in fixtures. • Hallways – CFL PL cylinder fixtures, 2 lamp T12 lay-in fixtures, 2 lamp T5 lay-in indirect fixtures and 4 lamp T12 2’ and 4’ lay-in fixtures. • Restrooms – 2 lamp T5 lay-in indirect fixtures. • Exterior – High pressure sodium wall pack fixtures and metal halide can fixtures.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat screen monitor and a printer. Laboratories are equipped with a wide variety of test and measurement instruments and test fixtures. Air compressors, domestic water heaters and other plug loads including copiers, fax machines, water coolers and vending machines are in use.

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Building 269 Central Utility Plant

Building 269 Number Year 1965, 1985, 1995 Square Feet 21,071

Building Description

The Central Utility Plant (CUP) houses the chilled water, steam, and co-generation plants along with associated offices and control areas for facility engineering and maintenance staff. The CUP was

originally constructed in 1965, with additions constructed in 1985 and 1995.

The 1965 addition includes boiler room, chiller room, generator, storage, office and shop spaces. Its evelope consists of 12” concrere block exterior walls finished in stucco or paint, a precast concrete tee roof deck with 3” of composite insulation board and a membrane roofing system, and a 6” reinforced conrete slab-on-grade foundation. The 1985 addition provided space for additional chillers, and has a buidling envelope similar to the 1965 section.

The 1995 addition was constructed to house the cogeneration primary equipment. This addition included floor area added to the CUP for the generator, a new control area, and a separate structure constructed to house absorption chillers. The envelope of the expansion is similar to the 1965 section, with the exception of a structural steel supported metal roof deck instead of precast concrete tees. The absorption chiller structure consists of 8” metal stud supported exterior wall with exteror drywall finished in stucco, and a structural steel supported metal roof deck with 3” of composite insulation board and a membrane roofing system.

HVAC Systems

The CUP mechancial systems provide chilled water , steam, and electricity to the campus. The systems include primary cooling, heating, and power generation components along with associated distribution and control systems. During the course of audit, the CUP cooling systems were in the process of

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extensive modification, including modification of the primary chilled water loop manifolds and replacement of absorption chillers with a steam turbine driven chiller. The following systems description will address the baseline conditions of the CUP cooling plant prior to the on-going modifications.

Chiller water is provided by three electric constant speed centrifugal chillers, and two absorption chillers. The heat source fot the absoption units is the steam loop. Heat rejection for the chillers is provided by induced draft cooling towers with VFD equipped fan motors. Three single-cell towers serve the electric chillers, and a two-cell tower serves the absoprtion units. Chilled water is circulated by primary and secondary chilled water pumps, and underground thermal storage tanks with charging pumps. The chiller plant also includes two thermal storage tanks installed under the parking loat adjacent to the CUP. The two tanks hold a total of 3,000,000 gallons of chilled water. The tanks are charged during the electric utility off-peak period and discharged during the peak period. Peak production of the chiller plant is roughly 6,600 tons compared to 7,640 tons of installed nominal capacity.

Steam for the campus loop is provided by a combination of forced draft natural gas fired steam boilers and a waste heat recovery steam generator (HRSG) attached to a natural gas fired electric generator turbine. Two of the boilers are water-tube units, and one is a fire-tube unit, and each boiler is equiped with a non-condensing economizer. Steam is provided to the campus loop at 100 psi, and the total steam plant capacity is 124,000 lb/hr.

A co-generation plant was added to the CUP in 1995, whereby a significant fraction of the campus electrical load is served by a natural gas fired electric turbine. The turbine has a nominal capacity of 4 MW, and is attached to the HRSG, which provides up to 22,000 lb/hr of 100 psi steam. The turbine operates continuously at maximum load, and during the summer can provide for all of the campus steam loop loads.

Space conditioning for the office and control areas of the CUP is provided by a floor-mounted vertical air conditioning unit with chilled water coil, steam coil, and a constant speed centrifugal fan. The boiler and chiller areas a conditioned by a number of unit heaters with steam coils, and evaporative cooling units.

The CUP systems are controlled by a DDC system including DDC sensors and actuators, TAC Vista controllers, and a Niagara web-based front end. The control system includes complete networked control of status, staging, setpoint, monitoring and trending of chilled water, steam, and co-generation control points.

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The following table provides a schedule of the primary mechanical equipment installed at the CUP.

Table B.21. Chiller Plant Equipment

Equipment Quantity Rating Service CH-1,2,3 3 1,500 Ton Electric Centrifugal Chiller 3,000 GPM CH-4,5 2 1,570 Ton Steam Absorption Chiller 3,600 GPM CT-1,2 2 2,812 Ton Absorption Chiller Cooling 6,750 GPM Towers CT-3,4,5 3 2,125 Ton Electric Chiller Cooling 5,100 GPM Towers CHP-1,2,3 3 100 HP Electric Chiller Primary 3,100 GPM Pumps 95 Ft. hd. CHP-4,5 5 200 HP Absorption Chiller Primary 3,600 GPM Pumps 150 Ft. hd. CHWP-1,2,3,4 4 200 HP Circulation Loop 3,300 GPM (Secondary) Pumps 210 Ft. hd. Charg-1,2 2 125 HP Thermal Storage Charging 4,000 GPM Pumps 80 Ft. hd. CWP-1,2,3 3 100 HP Electric Chiller Condenser 5,100 GPM Water Pumps 65 Ft. hd. CWP-4,5 2 200 HP Absorption Chiller 6,750 GPM Condenser Water Pumps 95 Ft. hd. Notes: CHW = chilled water coil

Ft. hd. = feet of head pressure

IN. WC = inches of water column

GPM = gallons per minute

HP = horsepower

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Table B.22. Steam Plant Equipment

Equipment Quantity Rating Service B-1,2 2 40,000 LBSTM/HRPSIG Package Watertube 125 Boiler B-3 1 20,000 LBSTM/HRr Firetube Boiler 3,600 PSIG Feedwater Pumps – 1,2 2 20 HP Boiler 1,2 Feedwater 90 GPM Pumps 150 PSIG Feedwater Pumps -3 1 15 HP Boiler 3 Feedwater 50 GPM Pump 150 PSIG CP-1,2 2 17,500 LBSTM/HRPSIG Steam Powered 100 GAL Condensate Pumps and 85 Receiver Tanks HRSG-1 1 22,400 LBSTM/HRPSIG Heat Recovery Steam 100 Generator Notes: LBSTM/HR = pound (mass) of steam per hour

PSIG = gauge pounds per square inch

GAL = gallons

GPM = gallons per minute

HP = horsepower

Table B. 23. Electric Generator

Equipment Quantity Rating Service GTG-1 1 4,195 kW Natural Gas Turbine 48.1 MBTU/HR Electric Generator

Lighting Systems

The CUP interior lighting systems include ceiling-mounted fixtures with 40-watt and 96-watt T12 linear fluorescent lamps, and 32-watt T8 linear fluorescent lamps. Exterior lighting includes wall-mounted fixtures with metal halide, high pressure sodium, and compact fluorescent lamps. Interior fixtures are controlled by toggle style wall switches, while the exterior fixtures have photocell and time-clock controls.

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Plug Load Equipment

Offices contain typical office equipment including computers and monitors, copy machines, and coffee makers. The control room has a high-density of desktop computers with associated monitors, and power electronic controls associated with the co-generation system.

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Building 276 – Walden Hall

Year 1966

Square Feet 36,259

Floors 3

Building Description Walden Hall serves the University Mathematics Departments and was built in 1966. The facility is named after Earl Walden, a former professor, department head and dean. Approximately 743 staff and students visit the building daily during spring and fall semesters. There is a considerable decrease in building occupancy during the summer. The building envelope consists of steel reinforced concrete foundation walls, 8” un-insulated concrete masonry unit walls, and a cement stucco exterior coating with a painted finish. The floors are slab-on-grade with carpet finishes. The roof structure is made from precast concrete structural tees with a white sprayed on exterior foam roof surface. The ceilings are primarily standard acoustic, lay-in panels on a t-grid suspension system. The interior walls are gypsum board over framing with a painted finish. The windows are inoperable single-pane, metal frame units with no thermal breaks. The building entrances have hollow insulated steel doors fitted with fixed glass panels mounted to steel frames. Interior doors are primarily wood. The building contains offices, classrooms and a computer center. The energy management system was first upgraded in 1981.

HVAC Systems

The HVAC systems serving Walden Hall were installed in 1966. The alternate Colloquium and the multi-zone unit designed to serve it, were not built/installed. Over 100 ceiling-mounted four-pipe fan coil units serve the various spaces on the three floors which comprise the building. Pneumatic controls are still in place for the FCUs and the

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chilled and hot water plant have been converted to DDC. A 100 percent outdoor air make-up unit on the roof supplies untreated outdoor air to the FCUs with ductwork run down and out through the return air plenum space above the ceilings. Depending on the magnitude of large intermittently used spaces in the current floor plan, demand ventilation may be possible. DDC of the FCU’s pneumatic control valves would gain control of the space setpoints. Some of the FCU’s control valves are three-way and variable flow seems possible. Considering the age of the systems and the limitations of the outdoor air introduction method, replacement of the MUA unit with a pretreater equipped with variable volume capabilities might be considered.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with DDC steam valves modulated to control hot water supply temperature to the heating coils serving the FCUs. The hot water supply temperature setpoint is reset to 155ºF when the outdoor air temperature is 25ºF and at 70ºF OAT the reset is 100ºF. VSDs on the hot water pumps are not installed. Space heating is accomplished solely by the fan coil unit heating coils. The FCU’s hot water control valves are under local pneumatic room thermostat control. The FCU’s hot water control valves are two-way.

Ventilation: The 100 percent outdoor air make-up unit supplies 14,200 CFM to the ceiling plenums of the building. Originally, three exhaust fans totaling 1,935 CFM served the restroom areas in the northeast corner of the building. One of these original exhaust fans has been replaced by three individual exhaust fans most likely totally the same CFM. The original five seminar spaces on the third floor (now three large classrooms) have additional exhaust fans installed on the roof. This may also alleviate an excess of make-up air originally designed into the building.

Cooling: The typical bypass chilled water arrangement has been converted to DDC, but no VSDs are in place. The large CFM capacity of the 100 percent outdoor air make-up unit may, under certain conditions, assist in the cooling of the building; however, all cooling is performed through the ceiling-mounted fan coil chilled water coils. Three-Way pneumatic control valves modulated to maintain space setpoint in sequence with the hot water control valve. Pump heads could conceivably shift the spring ranges of the chilled and hot water control valves. If the heating and cooling plants are active, and the spring range shift is happening, there would be some simultaneous heating and cooling. The high discharge temperature of the fan coil units (60DB/55WB) is of some concern; however, preliminary calculations yield space humidity at only 44.5 percent R.H. when the discharge air is sensibly heated to 75ºF DB. The 100 percent outdoor air unit does not condition the outdoor air

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that is introduced to the fan coil units in the ceiling plenum. The listed EAT of the cooling coils is 82/63.5WB which would result from 77.8ºF return air. The Design (1 percent) of the outdoor air is 102/70WB in Las Cruces. The pre-conditioning of the outdoor air during high outdoor air humidity should be considered. High occupancy classrooms, seminar rooms, and other rooms. with high latent gains cannot be met with the fan coils currently installed without pre-conditioning of the outdoor air component from the make-up air unit.

Table B.24 provides a schedule of the available mechanical equipment installed at Walden Hall.

Table B.24. Building HVAC Schedule

Equipment Qty. Rating Service MUA-1 1 14,200 CFM All Floors FCU 102 200-1,100 CFM All Floors PCHW 1 7.5 / 331 / 45 HP / GPM /Ft. hd. CHW Loop CHWP-1 1 5 / 283 / 47.1 HP / GPM /Ft. hd. CHW Loop HWP-1 1 2 / 88 / 45.3 HP / GPM /Ft. hd. HW Loop C-1 1 102/ 1532 GPM / PPH Notes: HP = horsepower GPM = gallons per minute FT = Static pressure (feet) CHW = Chilled Water Coil CFM = cubic feet per minute (air) HW = hot water coil PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout Walden Hall includes:

• Classrooms – 2x4 3 lamp T8 lay-in fixtures and 2x2 3 lamp 2’ lay-in fixtures. • Hallways- 2x4 2 lamp T8 lay-in fixtures. • Offices – 2x4 3 lamp T8 lay-in fixtures. • Exterior – CFL wall packs, recessed fixtures and jelly jars along with high pressure sodium wall packs.

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Plug Load Equipment

The building has a variety of plug load equipment in operation. A large number of computers with flat screen monitors and printers are located in the learning and computer centers; these devices also appear in the offices. The break area has a microwave oven and coffee maker. Detailed plug load survey results are available in the technical appendix.

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Building 278 – Branson Hall Library

1951, 1965, 1974, Year 1973, 1980

Square Feet 159,696

Floors 4

Building Description Branson Hall Library was built in 1951 and renovated in 1995. The library houses text and resources related to engineering, business, agricultural materials, science, special collections, maps, government publications, and University archive material. Additions were completed in 1965, 1974, and 1980. Several interior renovations and remodels have been performed through 2007. The original 1951 building consists of four floors above ground with a rooftop penthouse. The envelope consists of a 12” steel reinforced concrete foundation walls, a reinforced concrete slab and precast exterior concrete unit walls with a painted exterior finish. The slab floors are finished with linoleum tile or carpet; service areas are bare concrete. Interior walls are smooth with a painted finish. The roof area is flat, with asphalt sheeting over a built-up roofing system and metal decking. An aluminum t-grid ceiling suspension system with lay- in acoustic panels is installed in the interior spaces; some areas show hard-deck ceilings. Windows are inoperable fixed with in metal frames. The original building entrances have steel door frames and steel doors fitted with fixed glass panels. Interior doors are hollow metal frames with a mixture of metal and wood construction.

In 1965, a four-story addition was constructed to the west of the 1951 structure and added over 50,000 sf. to the library facility. The envelope consists of a 12” steel reinforced concrete foundation walls, a reinforced concrete slab and 8” un-insulated concrete masonry unit walls with painted cement stucco exterior finish. The floors are finished with tile or carpet. The interior walls are smooth with a painted finish. The roof structure is flat and consists of asphalt sheeting, a built-up roofing system including rigid insulation and concrete fill over metal decking. An aluminum t-grid ceiling suspension system with acoustic lay-in panels is installed in the interior spaces.

The 1974 addition is located north of the 1965 expansion and adds over 32,000 sf. to the complex.

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The envelope has steel reinforced concrete foundation walls and slab and 8” un-insulated concrete masonry unit walls with painted cement stucco finish. The interior is finished with painted ⅝” gypsum sheathing. The windows are inoperable double-pane metal-framed units. The roof structure is flat and consists of asphalt sheeting, rigid insulation and concrete fill over metal decking. The doors and interior finishes are similar to the existing structures.

In 1980, a single-story 5,000 sf mechanical building was constructed and is located to the west and north of the 1974 addition.

HVAC Systems

The HVAC systems serving the Branson Library were installed in 1965, 1974, 1980, and 1994. The East/ original building was outfitted with single-zone air handlers ducted down to the floors below and has since been modified with I/P transducers in order to keep the zones of spaces controlled as best as possible. A NMSU project is in progress to replace the two AHUs and includes DDC. The 1965 addition also included a remodel of the original (east) building. Two existing double-duct system were modified with dampers in the hot and cold duct supply, a chilled water (main) valve was added and the supply fans were re-sheaved. These hot and cold ducts were connected to ductwork serving the floors below. The 1965 (south) addition is served by a double-duct air handler serving constant volume mixing boxes (ranging from small to large). The 1974 addition (north) continued the double-duct serving boxes strategy. The 1980 addition employed chilled water / hot water roof-mounted air handling system operating as a single-zone unit. This 1980 system had its own converter, chilled and hot water pumps. A few thru-the-wall DX units along the north edge of the original building serve offices and a few CHW / HW fan coil units serve added vestibule/lobby type areas included in the south entrance project. Three penthouses house equipment serving the original building floors, the south and north additions. The newer south and north penthouses double- duct units are near industrial quality and scale and both still employ significant pneumatic control. Some of the large control valves have been converted to DDC. VSDs have been added to large fan motors. There is a lower level for converters and pumps. Nearly all of the main air systems have the typical 100 percent outdoor air capability and VSDs have been strategically added as have DDC valves. The facility is a prime candidate for VAV conversion with the boxes being 35 to 45years old and the energy savings potential. Taking the

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DDC retrofit clear out to the box / space level is well within reach.

Table B.25 provides a schedule of the available mechanical equipment installed at the Branson Library.

Table B.25. Building HVAC Schedule

Equipment Qty. Rating Service AHU-1 & 2 1 26,667 CFM 1965 Addition MB 76 1000-3,450 CFM 1965 Addition MB 63 150-1000 CFM 1974 Addition FCU 7 590-1230 CFM 1974 Addition RTU1 1 6000 CFM 1980 Addition SF-1 1 86400 CFM 1965 Addition SF-2 1 26605 CFM 1974 Addition SF-3 1 26605 CFM 1974 Addition SF-4 (RF) 1 25000 CFM 1974 Addition SF-5 (RF) 1 25000 CFM 1974 Addition CC-1-6 1 86400 / 2204 CFM / MBH 1965 Addition HC-1 1 69200 / 1800 CFM / MBH 1974 Addition HC-2 1 69200 / 1800 CFM / MBH 1974 Addition CC6 1 53210 / 1573 CFM / MBH 1974 Addition CC7 1 40380 / 2110 CFM / MBH 1974 Addition P-1 1 15 / 552 / 70 HP / GPM /Ft. hd. 1965 Addition P-2 1 5 / 180 / 50 HP / GPM /Ft. hd. 1965 Addition P-3 1 ⅛ / 12 / 15 HP / GPM /Ft. hd. 1965 Addition P19 1 7.5 / 314 / 50 HP / GPM /Ft. hd. 1974 Addition P20 1 2 / 105 / 35 HP / GPM /Ft. hd. 1974 Addition P21 1 2 / 105 / 35 HP / GPM /Ft. hd. 1973 Addition P2 1 3 / 45 / 85 HP / GPM /Ft. hd. 1980 Addition P3 1 ¾ / 25 / 35 HP / GPM /Ft. hd. 1980 Addition C-1 1 180 / 1875 GPM / PPH 1965 Addition C-1 1 210 / 4375 GPM / PPH 1974 Addition C-1 1 60 / 625 GPM / PPH 1980 Addition Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil PPH = pounds per hour

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Lighting Systems

The predominant lighting used throughout the Branson library includes:

• Classrooms – 2x4 2 lamp paracube lay-in fixtures. • Hallways – 2 lamp indirect/direct T8 fixtures, 4 lamp wrap fixtures and Incandescent track fixtures. • Offices – 2 lamp 4’ and 8’ slimline eggcrate fixtures, 1x4 2 lamp lay-in fixtures and 2 lamp indirect/direct fixtures. • Main Library – 1x4 2 lamp lay-in paracube and prismatic fixtures, 2 and 4 lamp surface box fixtures, 2 lamp indirect/direct T8 fixtures and 2x4 4 lamp lay-in fixtures. • Restrooms -1x4 2 lamp paracube lay-in fixtures. • Exterior – High pressure sodium surface box fixtures and metal halide can fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a a toaster oven, and other kitchen appliances. Detailed plug load survey results are available in the technical appendix.

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Building 284 – Pan American Center

Year 1968

Square Feet 215,633

Floors 3

Building Description

Pan American Center is a 215,633 sf athletic center that also serves as a concert hall and special event center. Pan American Center can seat about 13,000 NMSU Aggie fans and is where the men’s and women’s basketball teams play. The event center was originally constructed in 1968, with a ticket office expansion built in 1984, and a small west addition in 1987.

The main building envelope consists of a steel reinforced concrete foundation walls over engineered compacted fill, un-insulated reinforced concrete masonry unit walls with cement stucco exterior finish; selected wall units are pre-cast concrete with a painted and stucco finishes. Structural steel columns and load bearing metal studs add support the structure. The building is insulations include R-19 batt, R-30 batt, 1”rigid and 2” rigid systems. Floors are slab-on-concrete with carpet, tile, or sealed concrete finishes. Interior walls are CMU with a painted finish and gypsum board over metal studs. The roof is Elastomeric membrane roofing (EPDM) with R-30 rigid insulation supported by steel decking and joist. The ceilings in the arena areas are exposed. Offices, training rooms, conference rooms, corridors, and other rooms have suspended acoustic or gypsum board ceiling systems. Entrance have aluminum door with wired glass panels mounted in aluminum frames. Windows are primarily aluminum storefront with insulated tinted glass. Interior doors are a combination of wood and metal mounted in hollow metal frames.

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The Pan American Center’s administration offices and practice gym are located to the south of the arena. The addition envelope consists of steel reinforced concrete foundation walls, concrete masonry unit walls and a painted, textured stucco exterior finish. Floors are slab-on-concrete with carpet and linoleum finishes and the basketball court has engineered wood flooring. Interior walls are CMU and gypsum board over metal studs. The roof areas are flat with black membrane. Ceilings are suspended acoustical system in the office area and exposed structure in the gymnasium. The entry door is aluminum mounted in an aluminum frame with glass panels. Windows are primarily aluminum storefront with insulated tinted glass. Interior doors are a combination of wood and metal mounted in hollow metal frames.

HVAC Systems

The HVAC systems serving Pan Am Center were installed using a 2007 renovation design which included the new annex at the building’s south end housing new locker room facilities, athletic areas, and special event offices. The older part of the arena was extensively modified and a new concourse was added around the circumference of the arena. The HVAC systems include chilled water and steam from the physical plant, large single-zone constant volume air handlers, VAV air handlers. Large chilled water/hot water rooftop units and some direct expansion units for the main building, annex, and the ticket office. Multiple steam-to-hot water converters serve the heating coils within the systems and a triple-pump domestic hot water booster system was installed. Four of the large air handlers include dedicated minimum outdoor air with control dampers and CFM measurement devices. The units have 100 percent outdoor air capability to obtain free cooling on mixed air (dry bulb). A combination of return fans and relief fans are installed with multiple sequenced damper/fan sets maintaining space static pressure. These (constant volume) systems have had VSDs added to the supply air fans to vary total CFM to the Arena spaces served based on multiple space temperature sensors. The units have chilled water and hot water coils with two-way DDC valves. The units have been converted to near total DDC and all three-way chilled water control valves have been converted to two-way valves with DDC actuators, which have freeze protection and all the appropriate sensors (smoke, CO2, CO, and Temp).

Air handlers 5 and 6 are cooling only VAV type serving terminal units for the east and west concourses. Supply air temperature setpoint is reset from 65ºF F to 60ºF based on box load. Static pressure sensors in discharge ductwork, via VSD on supply fan motor maintain static pressure control. High static protection sensors are in place to protect ductwork. The terminal units are of the single-duct type and include hot water heating coils and controls for space temperature control. These VAV air handlers are shown to include 100 percent outdoor air capability so as to utilize free cooling and include minimum outdoor air and box minimum total CFM to match ventilation requirements.

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RTU-1 and -2 each have pre-heat hot water coils, chilled water cooling coils and the same dual outdoor air setup. The supply and return air fans are equipped with variable speed drives and the supply and return air have CFM measurement devices. The discharge air setpoint is reset from 65 degºF to 60ºF as average load increases. RTU-1 serves the annex offices and locker rooms and RTU-2 serves the gymnasium. Four pipe fan coil units, fan powered boxes and terminal units condition the annex and arena spaces. RTU-1 and -2 are shown with the same flow configuration but RTU-2 may be serving as a variable air single-zone to the large gymnasium space.

The second floor annex is served by 23 terminal units and three fan coil units. The first floor annex west side is served by24 terminal units (from RTU-1) and seven fan coil units. The first floor annex east side is served by 12 terminal units (from RTU-1), two fan coils and RTU-2. Arena south is served by eight terminal units (from AHU-5, -6 terminal units (from AHU-6), five FPB (from AHU-5), six FPB (from AHU-6), and two FCUs. Arena (north) is served by three FCUs, five terminal units (from AHU-5), and six terminal units (from AHU-6).

A mechanical area is shown within which AHU-1 thru -6 are located.

Heating: Hydronic heating is accomplished with three typical (existing) low pressure steam shell and tube heat exchangers each equipped with single DDC actuated steam valve modulated, in sequence, to control hot water supply temperature to the heating coils. The hot water supply temperature setpoint is reset via DDC controls to 160ºF when the outdoor air temperature is 35ºF outside and at 80 ºF OAT the reset is 120ºF. No heating coil discharge air temperature setpoint reset exists because all the air side equipment is configured in a single-zone arrangement and the supply air temperature setpoint is reset based on space load.

Ventilation: Multiple relief/exhaust damper/fans in the ductwork provide exhaust for the building. Large in-line return fans included in the economizer sequence serve to ventilate the spaces. Additional exhausting equipment is in place and separate minimum air duct, damper, and CFM measuring devices installed at the air handling units serve to maintain building positive pressure. Additionally, automatic control dampers above the entrance doorways are installed to relieve space air pressure during economizer cycle.

Cooling - Cooling is accomplished by the cooling coils serving AHU-1 thru -6, RTU-1 and -2, and strategically located FCUs. Free cooling from 100 percent outdoor air capable air handlers/economizer

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equipped air handlers replaces mechanical cooling when outdoor air temperature (only) is within a certain range. Typically, economizer controls are set to switch to mechanical cooling above 80ºF Table B.26 provides a schedule of the available mechanical equipment installed at the Pan American Center.

Table B.26. Building HVAC Schedule

Equipment Quantity Rating Service AHU-1 1 * CFM / SP / HP Arena South AHU-2 1 * CFM / SP / HP Arena East AHU-3 1 * CFM / SP / HP Arena North AHU-4 1 * CFM / SP / HP Arena West AHU-5 1 * CFM / SP / HP AHU-6 1 * CFM / SP / HP RTU-1 1 * CFM / SP / HP RTU-2 1 * CFM / SP / HP FCU 1-22 22 * CFM / SP / HP Throughout TU 1-93 93 * CFM / SP / HP Throughout FPB 1-4 4 * CFM / SP / HP Arena South and North SF-1 1 * CFM / SP / HP AHU-1 RF-2 1 * CFM / SP / HP AHU-1 Rel Fan Mult 1 * CFM / SP / HP AHU-1 SF-1 1 * CFM / SP / HP AHU-2 RF-2 1 * CFM / SP / HP AHU-2 Rel Fan Mult 1 * CFM / SP / HP AHU-2 SF-1 1 * CFM / SP / HP AHU-3 RF-2 1 * CFM / SP / HP AHU-3 Rel Fan Mult 1 * CFM / SP / HP AHU-3 SF-1 1 * CFM / SP / HP AHU-4 RF-2 1 * CFM / SP / HP AHU-4 Rel Fan Mult 1 * CFM / SP / HP AHU-4 SF-5 1 * CFM / SP / HP AHU-5 SF-6 1 * CFM / SP / HP AHU-6 Supply Fan 1 * CFM / SP / HP RTU-1 Return Fan 1 * CFM / SP / HP RTU-1 Supply Fan 1 * CFM / SP / HP RTU-2 Return Fan 1 * GPM / Ft. hd. /HP RTU-2 HWP-1 1 * GPM / Ft. hd. /HP HW Loop

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HWP-2 1 * GPM / Ft. hd. /HP HW Loop CHWP-1 1 * GPM / Ft. hd. /HP CW Loop CHWP-2 1 * GPM / Ft. hd. /HP CW Loop DWP-1 1 * GPM / Ft. hd. /HP DW Loop DWP-2 1 * GPM / Ft. hd. /HP DW Loop DWP-3 1 * GPM / Ft. hd. /HP DW Loop Hx-1 1 * GPM / PPH Domestic Hot Water Hx-2 1 * GPM / PPH Domestic Hot Water Hx-3 1 * GPM / PPH Domestic Hot Water *Equipment ratings pending availability of design drawings Notes: HP = horsepower GPM = gallons per minute Ft. hd. = feet of head CFM = cubic feet per minute (air) PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout Pan American Center includes:

• Main Arena – Court lighting consisted of 1000w metal halide high bay fixtures and seating has metal halide cylinder type fixtures. • Offices / Conference Rooms – 2 lamp T8 lay-in fixtures, 3 lamp T8 Indirect fixtures, 3 lamp T8 lay-in fixtures and CFL PL cans were mostly found in the office areas. • Gym / Gym Lockers – CFL PL can fixtures, 2 lamp T8 lay-in fixtures and 3 lamp T8 lay-in fixtures. • Hallways – 3 lamp T5HO Indirect fixtures and CFL PL cans are predominant but there were also 2 lamp T8 lay-in fixtures and metal halide cylinder fixtures also throughout these areas. • Restrooms – 2 lamp T8 lay-in fixtures and CFL PL cans. • Exterior – CFL PL can fixtures and Incandescent cans along with a few metal halide wall pack fixtures.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat screen monitor and a printer. Break rooms have refrigerators, microwave ovens, toasters, and coffee makers. The snack bar has commercial cooking equipment including electric broilers, fryers, and a

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commercial coffee brewer. Other plug loads including copiers, fax machines, and vending machines are in use. Detailed plug load survey results are available in the technical appendix.

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Building 288 - Guthrie Hall

Year 1967

Square Feet 41,531

Floors 4 W & 3 E

Building Description

In addition to classrooms and faculty offices, Guthrie Hall houses the advising center for the College of Business. Building occupancy consists of approximately 948 students visiting classrooms and advisement offices daily during spring and fall semesters with the summer semester having less use and a considerable decrease in building occupancy. The facility is comprised of west and east structures joined by an enclosed bridge-way. The west building houses office space on four floors for advisors, faculty, and administration staff. The east building contains classrooms on the first and second floors with the third floor classrooms modified to office spaces. The basement is accessed through the west building and has entry to the campus utility tunnels. The building envelopes consist of steel reinforced concrete foundation walls, 8” un-insulated concrete masonry unit walls with a painted cement stucco exterior finish. The floors are slab-on-grade with carpet finishes. The roof areas are flat, with asphalt and rigid insulation over light weight concrete, and precast structural concrete tee; the east building has a top layer of gravel. The interior walls are primarily plaster on plywood paneling with a painted finish. The ceilings are acoustic lay-in panels on aluminum t-grid system. The windows are inoperable, aluminum frame, double-pane tinted glass with no thermal breaks. Entry doors are aluminum frame with aluminum framed glass doors. Interior doors are primarily wood mounted in a hollow metal frame.

HVAC Systems

The HVAC systems serving Guthrie Hall were installed in 1967 and are double-duct with constant volume mixing boxes. The supply fans are both in the basement of the west building and high pressure air is transported over to the east building. Pneumatic thermostats control the boxes and the supply fans are

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not equipped with VSDs. The system is a prime candidate for VAV retrofit. The original chilled water coils were wild but the building cooling coils have been retrofitted with DDC two-way control valves. The chilled water pump is on VSD.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with pneumatic steam valves modulated to control hot water supply temperature to the heating coils serving the air handlers. The design included one hot water pump. The hot water supply temperature setpoint is reset with hot deck demand. Space heating is accomplished by the hot water coils in the main air handlers distributed via the hot duct run out to the mixing boxes.

Ventilation: Exhaust - Facility has an exhaust riser to vent sets for both the east and west buildings. Five relief fans are scheduled totally some 55,000 CFM and the air systems are equipped with outdoor air dampers and return dampers.

Cooling: The hydronic cooling is provided by typical central plant tertiary pumping configuration, with a throttling control valve controlling the return chilled water temperature to a setpoint of approximately 58ºF. The chilled water pump does not have a redundant back-up pump but it is equipped with a VSD. Space cooling is accomplished at the air handler units via the cold duct to the boxes. Free cooling is obtained with economizer mode of the air handlers. The boxes have only one pneumatic actuator and may have some overlap.

Table B.27 provides a schedule of the available mechanical equipment installed at Guthrie Hall.

Table B.27. Building HVAC Schedule

Equipment Qty. Rating Service MB1 through MB25 37 400-4860 CFM SF-1 1 26,000 / 30 CFM / HP SF-2 1 39,000 / 40 CFM / HP EF-1 1 5,840 / 1/2 CFM / HP EF-2 1 1,560 / 1/3 CFM / HP EF-3 1 19,70 / 1/3 CFM / HP RF-1 1 18,530 / 3 CFM / HP RF-2 1 11,100 / 3 CFM / HP RF-3 1 11,100 / 3 CFM / HP RF-2A 1 7,400 / 1 CFM / HP RF-3A 1 7,400 / 1 CFM / HP HC-1 1 15,400 / 93 CFM / GPM HC-2 1 16,000 / 97 CFM / GPM

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CC-1 1 14,100 / 71 CFM / GPM CC-2 1 16,420 / 81 CFM / GPM CC-3 1 11,700 / 55 CFM / GPM CC-4 1 11,700 / 55 CFM / GPM CC-5 1 16,600 / 82 CFM / GPM P-1 1 10 / 352 / 72 HP / GPM /Ft. hd. CHW Loop P-2 1 3 / 190 / 40 HP / GPM /Ft. hd. HW Loop P-3 1 ⅛/ 11 / 15 HP / GPM /Ft. hd. DHW C-1 1 190 / 1900 GPM / PPH Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout Guthrie Hall includes:

• Classrooms -2x4 3 and 4 lamp T8 prismatic and paracube fixtures along with some 2 lamp T8 surface box style fixtures. • Hallways – 2x4 2, 3 and 4 lamp T8 prismatic lay-in fixtures. • Offices – 2x4 3 lamp T8 prismatic lay-in fixtures. • Exterior – CFL recessed fixtures and high pressure sodium wall packs.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices and computer labs have desktop computers with flat screen monitors and printers. The break areas have microwave ovens, coffee makers, a refrigerator, and other kitchen appliances. A television monitor is installed in a common area in the advisement center. Vending machines are located in the halls of the east building. Detailed plug load survey results are available in the technical appendix.

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Building 301 – Thomas & Brown Hall

Year 1972

Square Feet 49,711

Floors 3

Building Description

Thomas & Brown Hall is home to the University’s Electrical Engineering Department and is named for Melvin Thomas and Harold Brown who served as the department heads from 1934 to 1968. Thomas & Brown Hall’s external walls are comprised of 12” concrete masonry units (CMU) with stucco finish and no exterior insulation. The basement floor is 8” concrete slab-on-grade. The interior ceiling is comprised primarily of suspended acoustic panels. The roof structure is made from precast concrete structural decks with 2½” rigid insulation and an asphalt surface. Windows are primarily fixed single glass in hollow metal frames with tint. Many of the south windows have fixed exterior sun screens. The building contains engineering classrooms, offices, computer rooms, break rooms, lecture room, workrooms, restrooms, and other miscellaneous spaces.

HVAC Systems

The HVAC systems at Thomas & Brown Hall are served from central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water pump. There is one 7.5 HP chilled water pump. Thomas & Brown is equipped with a chilled water pump bypass and the chilled water pump was off at the time of the site visit. A hot water generator is used to transfer heat from steam to the building’s hot water system. Condensate is returned to the central plant via an automatic steam trap (APT) and a condensate return unit (CRU). There are two each 5 HP hot water pumps. The chilled water pump has a premium efficiency motor and VFD. The hot water pumps are equipped with a standard efficiency motors.

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Thomas & Brown Hall is equipped with a TAC Xenta DDC system and pneumatic controls. This system is used to control the chilled and hot water pumps and the mechanical air handling systems. The zone level temperature controls are pneumatic. The building’s DDC system is connected to the campus Niagara system over the wide area network.

The principle air handling equipment includes the main air handler (AHU) located in the basement.

The main AHU is a constant volume dual-duct system. This unit is a built-up AHU with no identifiable nameplate. It is equipped with two, Size 30 Trane air foil supply fans and five vane axial return relief fans. All of the return relief fans have standard efficiency motors and none of the fans are equipped with VFDs. The unit is equipped with a mixed air economizer that was not functioning properly at the time of the site visit as the damper linkages were not connected to their controlling actuator. The constant volume, dual-duct terminal mixing boxes include both the “Tuttle and Bailey” type and the traditional mixing boxes with a single pneumatic actuator controlling both the hot deck and cold deck through a reverse acting linkage.

Capacities for all fans and motors are provided in the Building HVAC Schedule shown below. Although the unit appears to be in fair condition, there were several issues identified that suggest that this unit is in need of retro-commissioning. For example, the linkage on the relief dampers was found to be disconnected from the actuator. The return and relief dampers were both found closed but the return relief fans were on.

Table B.28. Building HVAC Schedule

Equipment Quantity Rating Service CHW Pump 1 1 427/46.6/7.5 GPM/FT/HP CHW Loop HW Pump 1 & 2 2 114/45/5 GPM/FT/HP HW Loop Main AHU 2 23,850/4.6/25 CFM/SP/HP Supply Fan 5 7,600/1.0/3 CFM/SP/HP Return Fan 1 1,900 MBH Heating Coil 1 1,370 MBH Cooling Coil Notes: CHW = chilled water coil HW = hot water HP = horsepower HW = hot water GPM = gallons per minute CFM = cubic feet per minute FT = static pressure in feet

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SP = static pressure in Inches W. G.

Lighting Systems

• The predominant lighting used throughout Thomas & Brown Hall includes: • Classrooms – 2x4 3 lamp 28w T8 lay-in fixtures. • Hallways – 2x4 2 lamp 28w T8 lay-in fixtures and 3 lamp T8 egg crate fixtures. • Offices - 2x4 3 lamp 28w T8 lay-in fixtures. • Exterior – Metal halide surface box fixtures and Incandescent fixtures.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat panel monitor and a printer. Classrooms were found to have large numbers of computers. Laboratories were equipped with a variety of test and instrumentation equipment. The rest of the building consists of typical academic building plug load equipment including copiers, printers, fax machines, water coolers, and vending machines.

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Building 321 – James B Delamater Activity Center

Year 1973, 1996

Square Feet 114,109

Floors 2

Building Description

James B Delamater Activity Center (Activity Center) houses recreational sports, which includes intramural sports, outdoor recreation, the Aquatic Center, and the Wellness Programs. It includes a wide variety of spaces including gyms, fitness rooms, classrooms, offices, locker rooms, courts, and even a juice bar. Typical building occupancy at the Activity Center consists of approximately 600 students daily during spring and fall semesters. Summer semester attendance at the Activity Center is lower. The building was originally built in 1973 with a major addition constructed in 1996.

The building includes approximately 114,000 sf. with two floors above ground and basement mechanical room located below ground. The envelope consists of steel reinforced concrete foundation walls and precast concrete unit walls with a painted stucco exterior finish. The flooring is slab-on-grade with ceramic tile flooring primarily used and the gym flooring being an engineered wood system. The interior walls are primarily CMU block with painted finish. The majority of the ceilings are painted lay-in acoustical tile with the gymnasiums having painted exposed ceilings. The roof is built-up, painted white, over a lightweight concrete insulation on metal decking.

In 1996, the weight room and auxiliary gym were constructed, along with the new lobby. The auxiliary gym had a second level indoor track circling it. Many vaulted skylights were added connecting the auxiliary gym to the new lobby. Windows in the new lobby are double-pane, inoperable, with tinting.

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HVAC Systems

Space conditioning for the Activities Center is provided by a number of central station AHUs, each is equipped with constant volume fans, chilled water coils, and hot water coils. Chilled water is provided from a campus loop, hot water sourced of steam-to-hot water heat exchangers, with steam sourced from a campus loop. Chilled water and hot water are pumped from the campus loop via constant volume pumps serving the original building, and variable volume, VFD equipped pumps serving the 1996 additions.

The original building includes six constant volume multi-zone air handling units (MZ AHUs), each with constant volume supply and return/relief fans, and full economizer capability. These MZ AHUs serve the all areas excepting the main gymnasium, including locker room, storage, office, laundry, and racquetball court areas. The original building main gymnasium is served by a single-duct, constant volume AHU with a supply fan and two return/relief fans. It also has full economizer capability. The original building MZ AHUs utilize pneumatic controls.

The 1996 addition includes two ceiling-mounted constant volume AHUs with chilled and hot water coils which serve a secondary gymnasium area. A third AHU serves the north weight room, restrooms, lobby, and corridor areas. The 1996 addition AHUs are equipped with dual banks of chilled water coils, and along with a number of original building AHUs, indicate chilled water valve control problems that result in significant over cooling. The1996 AHU additions utilize DDC controls.

Domestic hot water is provided by a steam-to-hot water heat exchanger located in the mechanical room.

Table B.29 provides a summary of the available mechanical equipment installed at the James B. Delamater Activity Center:

Table B.29. Building HVAC Schedule

Equipment Quantity Rating Service 1972 AHU 1, 4 Supply Fan 2 10 HP 1972 Non-Gymnasium 1972 AHU 2,3,5 Supply Fan 3 15 HP 1972 Non-Gymnasium 1972 AHU 6 Supply Fan 1 30 HP 1972 Gymnasium 1972 AHU 1, 2, 4, 5 Return Fan 4 3 HP 1972 Non-Gymnasium 1972 AHU 3, 7 Return Fan 3 5 HP 1972 Non-Gymnasium 1972 CHW Pump 1 15 HP 1972 1972 HW Pump 2 5 HP 1972 1996 AHU-1 1 10 HP 1996 Weight Room

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1996 AHU-2, 3 2 10 HP 1996 Gymnasium 1996 CHW Pump 2 5 HP 1996 1996 HW Pump 2 5 HP 1996 Notes: CHW = chilled water coil HW = hot water coil HP = horsepower Ton = 12,000 BTU per hour

Lighting Systems

The predominant lighting used throughout the James B. Delamater Activity Center includes:

• Classrooms – 1x4 1 and 2 lamp T8 and T12 lay-in fixtures. • Gyms – 1x4 2 lamp lay-in fixtures, 2x4 3 lamp T8 lay-in fixtures, and 6 lamp T8 high bay fixtures. • Locker Rooms – 1x4 2 lamp lay-in fixtures and CFL recessed fixtures. • Common Areas – 2x2 2 lamp parabolic fixtures, 1 lamp T8 wall mount fixtures, 1x4 2 lamp lay-in fixtures, and 2 lamp T8 wall mount fixtures. • Offices – 1x4 2 lamp lay-in fixtures and 2x4 4 lamp lay-in fixtures.

Plug Load Equipment

The building has a variety of plug load equipment operating. Weight rooms typically have many forms of work out and exercise machines. Offices typically have a computer with a flat screen monitor and a printer. The Juice bar has commercial cooking equipment including blenders, mixers, other kitchen appliances. Other plug loads including copiers, water coolers, and vending machines are in use. Detailed plug load survey results are available in the technical appendix.

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Building 330 – New Mexico Department of Agriculture

Year 1974, 1981

Square Feet 28,288

Floors 1

Building Description

New Mexico Department of Agriculture (NMDA) houses offices and laboratories for the State of New Mexico. The building was originally constructed in 1974, with an addition and modification performed in 1981 and 1991. The original 1973 section includes 28,171 sf. with one floor above ground and a basement floor below grade. The 1981 addition added 117 sf. of space and connected the existing small detached lab to the main building. The envelope at NMDA consists of 16” steel reinforced concrete foundation walls and 12” concrete block walls with cement stucco finish on the exterior. The majority of the interior walls are a mix of painted concrete block and plaster and the ceilings are comprised of lay-in acoustical tile. The roof of the building is flat, white, and built-up, with 2” rigid insulation on 1½” metal deck. Windows are dual-pane, fixed, tinted and mounted in metal frames. Exterior doors are metal with glass panels mounted in a metal frame. Interior doors types are either wood or hollow metal mounted in appropriate framing. NMDA’s building occupancy schedule is Monday through Friday from 8am to 12pm and from 1pm to 5pm; closed on Saturdays and Sundays.

HVAC Systems

The space conditions system at NMDA includes one air handling unit (AHU) which is constant volume, dual-duct with hot deck steam coil and cold deck chilled water coils. Steam and chilled water are sourced from the central utility plant via campus distribution loops.

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The original building is conditioned by a built-up basement AHU. The basement AHU has two 15-HP supply fans each of which have variable frequency drive (VFD) controlled motors. Each supply fan has a capacity of 13,200 CFM at 3.6” static pressure. There are two stacked cooling coils associated with this AHU and one heating coil. The zones served by these units have constant air volume and dual-duct mixing box terminal units. The AHU down to the majority of the zone levels has full DDC capabilities, although some parts of the building remain pneumatic. The basement AHU has a return fan capacity of 16,000 CFM at 0.6” static pressure and has one 5-HP motor with VFD controlling. To maintain specific room temperature and humidity levels, a dedicated air handling unit, fitted with a humidifier, serves the metrology laboratory. Supply air is delivered to the unit by the main AHU. Additionally, there are also three air compressors located in the basement mechanical room - one- 5-HP, one 3- HP, and a small one that has been decommissioned.

The basement mechanical room has remnants of an old solar thermal cooling and heating system. There were once panels on the roof but now they have been removed. They entire system is out of commission but there are storage tanks, controls, and some piping that still remains. Two solar pumps have been disassembled and two have been entirely removed.

On the roof there are two American Standard heat pumps which service the seed and chemistry lab, without economizers present and both appear to be 3-tons. Also on the roof is an American Standard package unit with no economizer and it appears to be roughly 7.5 to10-tons. There are seven small exhaust fans and hoods present on the roof in various locations. The lower roof (addition) is equipped with small gas-packs of various sizes with no economizers. In addition, there are three small exhaust fans for building hoods, one relief vent, and one small condensing unit.

In 2011, an addition was build next to NMDA that occupies 3,120 sf. The NMDA addition uses the main NMDA’s mechanical room for its heating and cooling processes. On the addition there is a single rooftop AHU which consists of a single-duct VAV with terminal hot water reheat coils. There are nine VAV terminal units throughout the building.

Chilled water for the NMDA cooling systems provided by the campus central chilled water loop. Chilled water is distributed to these systems by two5-HP, variable volume chilled water pumps with a VFD controlled motor. The chilled water pump is enabled based on AHU chilled water valve position as a proxy for cooling demand. A two-way control valve is present on the chilled water system.

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Hot water for the NMDA AHU heating coils is provided by a steam-to-hot water heat exchanger. Steam is provided by the campus steam loop, with the heating hot water supply temperature setpoint controlled by modulating steam control valves. The supply temperature setpoint is reset according to outside air temperature. Heating hot water is distributed throughout the building by a 5-HP variable volume hot water pump with a VFD controlled motor. There is a three-way control valve present at the unit. A hot water generator is used to transfer heat from steam to the building’s heating water and domestic hot water systems. Table B.30 below for a schedule of the New Mexico Department of Agriculture hot and chilled water distribution equipment.

Table B.30. Building HVAC Schedule

Equipment Quantity Rating Service AHU-1 SF 2 13200 / 3.6 / 15 CFM / SP / HP Supply Fans AHU-1 RF 1 16000 / 0.6 / 5 CFM / SP / HP Return Fan M1-M10 20 150-3000 / 0.85-0.75 CFM / SP Mixing Boxes CHWPs 2 230 / 50 / 5 GPM / Ft. hd. / HP HWP 225 / 46 / 5 GPM / Ft. hd. / HP EF-43 1 7800 / 1.5 / 5 CFM / SP / HP Fume Hood Exhaust EF-44 1 3960 / 0.7 / 2 CFM / SP / HP General Exhaust EF-45 1 600 / 0.5 / ⅓ CFM / SP / HP Chemistry Lab Open Hood Exhaust Notes: HP = horsepower SP = static pressure in inches GPM = gallons per minute Ft. hd. = feet of head CFM = cubic feet per minute (air)

Lighting Systems

The predominant lighting used throughout the NMDA addition includes:

• Offices – 1x4 2 lamp lay-in fixtures and 2x4 4 lamp lay-in fixtures. • Exterior – High pressure sodium wall pack and surface box fixtures.

Plug Load Equipment

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instruments and fume hoods. Break rooms have refrigerators, an electric stove, a microwave, a toaster, and a coffee machine. Other plug loads including copiers, fax machines, water coolers, and vending machines are in use. Detailed plug load survey results are available in the technical appendix.

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Building 338 - Educational Services Building

Year 1978, 1991

Square Feet 50,366

Floors 1

Building Description Educational Services Center houses most student service departments. The single-story structure with a level below grade was built in 1978 with the Housing Department addition completed in 1991 and numerous interior renovations performed through 2011. The building envelope consists of 12” steel reinforced concrete foundation walls and 8” un-insulated concrete masonry unit walls with a painted cement stucco exterior finish. Floors are concrete slab-on-grade with carpet, vinyl tile, or sealed concrete finishes. Interior walls are concrete mass units with ⅜” gypsum board glued to both sides with painted surfaces. The roof is area flat consisting of a foam surface sealed with a reflective coat over a built-up roofing system. The ceilings are primarily standard acoustic, lay-in panels on an aluminum t-grid suspension system. Windows are primarily fixed 1” insulated glass in hollow metal frames with bronze tint. Entrances have insulated hollow metal doors with fixed wire glass panels mounted in metal frames. Interior doors are mixture of wood and steel doors mounted in steel frames.

The 1991 Housing Department addition added over 3,000 sf. to the south side of the existing facility. The building envelope consists of 12” steel reinforced concrete foundation walls and 8” un-insulated concrete masonry unit walls with a stucco exterior finished to match the 1978 building. The floor is slab-on-grade with a carpet finish. The ceilings are acoustic panels in an aluminum grid suspension system. The entry and lobby areas have suspended gypsum ceilings with a painted finish. Floors are concrete slab-on-grade with carpet finishes. Interior doors are primarily wood doors mounted in steel frames.

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HVAC Systems

The HVAC systems at the Educational Services Center are served from central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems and the building’s chilled water pumps. In the lower level mechanical room there are two 10- HP chilled water pumps and two 3-HP hot water pumps. None of the pumps have variable frequency control drives (VFDs). Educational Services is not equipped with a chilled water pump bypass. A hot water generator is used to transfer heat from steam to the building’s hot water system. Condensate is returned to the central plant via an automatic steam trap and a condensate return unit.

The Educational Services Center is equipped with a TAC Xenta DDC system and pneumatic controls. This system is used to control the chilled and hot water pumps and the mechanical air handling systems. The zone level temperature controls are pneumatic. The building’s DDC system is connected to the campus Niagara system over the wide area network.

The principle air handling equipment includes the main AHU and the Central Station multi-zone unit located in the upper level mechanical room.

The main AHU is a dual-duct VAV system. It is equipped with a single supply fan that serves the cold and hot decks and a single return fan. The supply fan is a vane axial unit. Originally, this fan was equipped with pneumatic variable pitched blades for volume control. They have been removed and the unit converted to fixed pitch with VFD control. The unit is equipped with a mixed air economizer and two-way heating and cooling control valves. The main AHU supplies two cooling and one heating trunk to the center of building where it branches off supplying several VAV boxes with heating and cooling.

The Central Station five-zone unit is used to serve the Regents Room and meeting areas in the center of the building. The unit’s supply fan produces 7,800 CFM at 1.34” static pressure and is equipped with a 5- HP standard efficiency supply fan motor. The return fan is equipped with a 1.5-HP motor. There are no VFDs on either of the fan motors. According to the as-built drawings the design cooling capacity is 255 MBH and the design heating capacity is 198 MBH. All of the five zones are controlled by pneumatic actuators. This unit is also equipped with a mixed air economizer and two- way heating and cooling control valves.

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Table B.31 provides a schedule of the available mechanical equipment installed at the Educational Services Center.

Table B.31. Building HVAC Schedule

Equipment Quantity Rating Service Main AHU 1 40,000 / 3.63 / 30 CFM / SP / HP Supply Fan Main AHU 1 38,800 / 0.63 / 10 CFM / SP / HP Return Fan Multi-zone 1 7,800 / 1.34 / 5 CFM / SP / HP Supply Fan Multi-zone 1 6,800 / 0.4 / 1.5 CFM / SP / HP Return Fan CHW Pumps 2 10 / 253 / 60 HP / GPM / Ft. hd. CHW Loop HW Pumps 2 3 / 112 / 46 HP / GPM / Ft. hd. HW Loop Notes: HP = horsepower GPM = gallons per minute Ft. hd. = feet of head SP = static pressure in inches CFM = cubic feet per minute (air)

Lighting Systems

The predominant lighting used throughout the Educational Services Center includes:

• Classrooms – 4 lamp T8 and T12 lay-in paracube type fixtures and incandescent can fixtures. • Offices / Conference Rooms – Predominant fixtures located in these areas are 1 lamp 2’, 3’ and 4’ T8 and T12 task fixtures, and 4 lamp T12 lay-in prismatic and paracube type fixtures. • Restrooms – 2 lamp T8 vanity fixtures. • Exterior – LED can fixtures and high pressure sodium wall pack fixtures.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat screen monitor and a printer. Break rooms have refrigerators, toasters, microwaves, ovens, and coffee makers. Other plug loads including copiers, fax machines, water coolers, and vending machines are in use. Detailed plug load survey results are available in the technical appendix.

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Building 363 – Engineering Complex I

Year 1980

Square Feet 55,585

Floors 2

Building Description

The Engineering Complex 1 (EC-I) external walls are comprised of 12” concrete masonry units (CMU) with stucco over 1½” rigid insulation. Floors are concrete slab-on-grade. The roof structure is made from precast concrete structural tees with a white sprayed on exterior foam roof surface. Windows are primarily fixed 1” insulated glass in hollow metal frames with bronze tint. The building contains engineering classrooms, offices, laboratories, machine shop, storage rooms, computer rooms, break rooms, workrooms, restrooms, and other miscellaneous rooms.

HVAC Systems

The HVAC systems at EC-I are serviced by central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water pump. There is one 7.5-HP chilled water pump equipped with a VFD. EC-I is not equipped with a chilled water pump bypass or a modulating control valve on the return loop. A hot water generator is used to transfer heat from steam to the building’s hot water system. Condensate is returned to the central plant via an automatic steam trap (APT) and a condensate return unit (CRU). There is one 3-HP hot water pump. The chilled and hot water pumps are both equipped with a standard efficiency motors.

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EC-I is equipped with a TAC DDC system. This system is used to control the chilled and hot water pumps, all mechanical air handling systems and all zone level control of terminal devices. The building’s DDC system is connected to the campus Niagara system over the wide area network.

Originally, EC-I was built with an air-to-air solar heating system that was later abandoned. The solar panels remain in place but have been capped and sealed. The solar panels cover approximately 4,600 sf. Each of the individual panels was connected to a supply and return plenum. The ducts connecting the panels to the plenum were removed and capped but some leakage from the panels into the adjacent mechanical room still exists. The mechanical room is directly below the solar panels and serves as a common return plenum for the buildings HVAC systems. The interior surface of the solar wall becomes very hot during the midday sun by air leakage and by conduction through the roof surface. This causes an increase in the return air temperature of about 10ºF. Given the large return air volume, it is recommended that the solar panels be removed and a new insulated and reflective roof surface installed. This would reduce the building’s peak cooling load and save cooling energy.

The principle air handling equipment includes the main air handler (AHU) and laboratory fans 1, 2, and 3.

The main AHU is a dual-duct VAV system. It is equipped with a cold deck supply fan, hot deck supply fan and a return fan. Each fan is a vane axial unit. Originally, these fans were equipped with pneumatic variable pitched blades for volume control. They have been converted to fixed pitch with VFD control. The air washer system has been removed from service. The unit is equipped with a mixed air economizer and a three-way cooling control valve. This unit is a built-up AHU with no identifiable nameplate however the fans were manufactured by Flakt. Capacities for all fans and motors are provided in the Building HVAC Schedule. Although the unit appears to be in fair condition there were several issues identified that suggest that this unit is in need of retro-commissioning. For example, during the site visit, the supply and return fan VFDs were found to be running in hand at 38.1 and 20.5 Hz respectively. A review of the Niagara system also found periods when the hot deck fan was commanded off yet remained running. With the heating valve commanded closed there was an 8ºF rise across the heating coil. During hot periods with the AHU in cooling mode, this was found to cause high hot deck static pressures and temperatures and mixing of the hot and cold supply air at a time when the hot deck fan should have been off.

The dual-duct mixing boxes were converted from pneumatic to DDC. Each box is pressure independent.

Laboratory fans 1, 2, and 3 serve the first floor east, west, and core laboratory areas. These units are identical constant volume units and are equipped with cooling coils only with mixed air economizers. Each laboratory fan is equipped with a 7.5-HP standard efficiency motor and a three-way cooling control valve. Three small fan coil units are used for reheat on laboratory fan 3. There was a large duct rupture

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and separation found at the terminal box located in the hallway in front of Room 139. This zone is served by laboratory fan 1 and further suggests that retro-commissioning would be beneficial.

A 4-Ton Trane packaged DX unit has been installed within the mechanical room/return air plenum. This unit rejects heat to the buildings return air plenum. This places an increased cooling load on the AHU’s cooling coils. The use of a spilt condensing unit and a new indoor unit should be considered.

Table B.32. Building HVAC Schedule

Equipment Quantity Rating Service CHW Pump 1 1 312/70/7.5 GPM/FT/HP CHW Loop HW Pump 1 1 170/45/3 GPM/FT/HP HW Loop Main AHU 1 34,000/4.0/40 CFM/SP/HP Heating Fan 1 30,000/4.5/40 CFM/SP/HP Cooling Fan 1 28,000/1.7/15 CFM/SP/HP Return Fan 1 1,700,000 BTUH Heating Coil 1 660,000 BTUH Cooling Coil Lab Fan 1 1 15,000/1.5/7.5 CFM/SP/HP West Lab Lab Fan 2 1 15,000/1.5/7.5 CFM/SP/HP Core Lab Lab Fan 3 1 15,000/1.5/7.5 CFM/SP/HP East Lab Packaged Unit 1 4 Ton N/A Notes: CHW = chilled water coil HP = horsepower FT = pump head in feet SP = static pressure in inches W. G. HW = hot water coil GPM = gallons per minute CFM = cubic feet per minute Ton = 12,000 BTU per hour

Lighting Systems

• The predominant lighting used throughout Engineering Complex I includes:

• Classrooms – 2x4 3 and 4 lamp prismatic fixtures.

• Shops – 400w high pressures sodium high bay fixtures, 4 lamp T5HO high bay fixtures, and 2 lamp T12 and T8 Industrial fixtures.

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• Offices – 2x4 3 and 4 lamp prismatic fixtures and 2 lamp Industrial fixtures.

• Hallways - 2 lamp T8 prismatic fixtures.

• Labs – 2x4 3 lamp prismatic fixtures, 2 lamp Industrial fixtures, and 1 lamp Industrial wall mount task fixtures.

• Restrooms – 1 lamp T8 strip fixtures.

Exterior – Metal halide wall packs and 1 lamp T8 weatherproof wraps.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a LCD monitor and a printer. The engineering labs include a machine shop and fabrication equipment. The rest of the building consists of typical academic building plug load equipment including copiers, printers, fax machines, water coolers, and vending machines.

Rooms EC1 210A and B have been converter from classrooms to computer labs. During the site visit it was noted that room 210A was vacant and all of the computers were off. In room 210B all of the computers were on although only two were actually in use.

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Building 364 – Clara Belle Williams Hall

Year 1978

Square Feet 24,671

Floors 3

Building Description Clara Belle Williams Hall, formerly known as the English Building, was built in 1978. It accommodates English Department classrooms, offices, and the Writing Center. The facility was renamed in February 2005 to honor Clara Belle Williams who was the first black student to graduate from the university. Typical building occupancy at the department consists of approximately 500 students daily during spring and fall semesters, with a considerable decrease in building occupancy observed during the summer session. The three-story envelope consists of 12’ steel reinforced concrete foundation footers, a 4” steel reinforced concrete foundation slab, and un-insulated concrete masonry unit walls with a painted cement stucco exterior finish. The floors are slab-on-grade with carpet, carpet tile, and linoleum finishes. The interior walls are 8” CMU block with painted finish. A masonry brick wainscot covers the lower surface of the hallway walls. The roof is flat, with asphalt and gravel over rigid insulation, lightweight concrete, and precast structural concrete tee. An aluminum t-grid ceiling suspension system with acoustic lay-in panels is installed over and engineered ceiling system and batt insulation. Windows are inoperable insulated tempered bronze glass. Entrances have insulated hollow metal doors with bronze tempered glass panels mounted in hollow frames. Interior doors are primarily wood mounted in a hollow metal frame. Interior vestibule doors are hollow metal with wire glass mounted in hollow frames.

HVAC Systems

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handlers serving (original) dual actuator constant volume mixing boxes. This system was installed as constant volume with pneumatic controls throughout. DDC has been added to the hot and chilled water plants and VSDs have been added to the pumps and large air handler fans. The fan coil units and mixing boxes remain under pneumatic control. Modification of mixing box pneumatics is evident and the (originally constant volume) boxes may be operating as variable (total) volume. The BAS graphics show on-line VSDs on both the Speech and English supply fans. DDC static pressure sensors have been added to both the cold and hot ducts and an overall static pressure setpoint value is entered as 1.00 in. water column. There may be a high signal select to control the speed of the supply fan so that the hot and cold duct pressure is a minimum of the two or an average of the two. The heating coil has less pressure drop than the cooling coil and the systems either over pressurize the hot duct or under pressurize the cold duct. The pneumatic thermostats control the cold duct damper position within the modified mixing boxes and, depending on calibration status and occupant access to setpoint control, there may be many boxes calling for full cooling and thus have their cold duct damper wide open. This would contribute to difficulty in maintaining desired static pressure in cold ducts.

The graphic also confirms DDC of the hot and cold duct supply temperature reset. CO2 control is evident and all major air handler relief/return/outdoor air dampers have been converted to DDC damper actuator control. The main chilled water bypass valve was originally installed as a butterfly valve linked arrangement and that has been partially disconnected. Steam-to-hot water converters have been converted to DDC valve control.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with DDC steam valves modulated to control hot water supply temperature to the heating coils serving the unit ventilators. Two hot water pumps, (both shown) with future VSDs, (redundant) serve the system. The hot water supply temperature setpoint is reset to 140ºF when the outdoor air temperature is25ºF and at 75ºF OAT the reset is 90ºF. The hot duct supply temperature on the double-duct units is reset from 105ºF when the outdoor air temperature is 25ºF to 70ºF when the outdoor air temperature is 75ºF. Some space heating is accomplished by the hot water coils in each of the fan coil units. Local DDC space thermostats control the hot water control valve, which is two-way pneumatic, in sequence with the pneumatic chilled water control valve. Majority of space heating is delivered by hot ducts to the mixing boxes. As the pneumatic space temperature thermostat modulates the hot deck mixing box damper actuator, warm air from the hot deck is increased in volume to heat the spaces. The Reader Lab roof-mounted air handler was designed to be a hot water/chilled water single- zone type air system. Alternate 6 was evidently not accepted and the hot and chilled water (source) piping was originally capped in the nearby mechanical room. At some later date, chilled water (only) was run out from the capping location to an added rooftop unit. This unit appears to be cooling only and serves the stage area between the English and Speech Buildings. Some heating source exists for this

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space and hot water piping could have been routed in a different way than originally designed. Further investigation is needed on this.

Ventilation: Since the large double-duct units have typical 100 percent outdoor air capabilities, relief fans were installed. A range was included in the south side of the Speech Building and restrooms throughout the two buildings, individual exhaust fans serve these areas. One of the mixing boxes discharges air into the ceiling plenum space near the (ceiling- mounted) fan coil units to supply some outdoor air to the spaces served by these fan coil units. Some of the restroom exhaust requirements are combined in a ducted system to roof-mounted vent-set type exhaust fans. Some in-line exhaust fans mounted in ceiling space provide exhaust for some areas.

Cooling: The hydronic cooling is provided by typical central plant tertiary pumping configuration, with a linked butterfly bypass control valve. The one chilled water pump is on VSD and a DDC bypass valve is shown as future. The chilled water pump is running at 100 percent speed. The fan coil units have two- way chilled water control valves and DDC two-way chilled water control valves have been added to the big double-duct units. The packaged rooftop has pneumatic two-way chilled water control valve. Control of the chilled water pump speed is being done off of a differential (water) pressure signal with a SPV of 10 psig. Cooling is being accomplished at the chilled water coils in the double-duct air handlers, the packaged rooftop unit and the fan coil units. The cold deck supply air temperature setpoints are reset from 55ºF when the outdoor air temperature is at 85ºF to 65ºF when the outdoor air temperature is at 25ºF. The fan coils modulate their chilled water coils on output of pneumatic thermostat in the space served. Free cooling via the large dampers at the double-duct units is attained up to 65ºF outdoors and then shifts to mechanical cooling.

Table B.33 provides a schedule of the available mechanical equipment installed at Clara Belle Williams Hall.

Table B.33. Building HVAC Schedule

Equipment Qty. Rating Service AHU21 1 3,000 CFM

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RTU1 1 32,500 CFM FCU16, 17 & 18 3 1,200 CFM FCU19 & 20 2 600 CFM MB 55 200 / 1600 CFM CF1 (Spl.) 1 22,000 / 25 CFM / MHP CF2 (Ret./Rel.) 1 20,000 / 10 CFM / HP CC 1 32,500 / 151 CFM / GPM HC 1 25,000 / 93 CFM / GPM CC5 1 22,000 / 90 CFM / GPM CC4 1 22,000 / 81.8 CFM / GPM CHWP7 1 15 / 275 / 110 HP / GPM /Ft. hd. CHW Loop HWP8 1 5 / 200 / 55 HP / GPM /Ft. hd. HW Loop HX11 1 200 / 2000 GPM / PPH Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout Clara Belle Williams Hall includes:

• Classrooms – 3 lamp T8 lay-in fixtures and 4 lamp T12 wrap fixtures along with a few incandescent can fixtures. • Hallways – 3 lamp T8 lay-in fixtures. • Offices – 3 lamp T8 lay-in fixtures and 4 lamp T8 wrap fixtures. • Restrooms – 3 lamp T8 lay-in fixtures. • Exterior – CFL recessed fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have desktop computers with a flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Refreshment vending machines are located in the hallways. Detailed plug load survey results are available in the technical appendix.

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Building 365 – Speech Building

Year 1978

Square Feet 28,322

Floors 2

Building Description The Speech Building houses the Department of Communication Studies and the Special Education/Communication Disorders Department, and was built in 1981 over the old south end zone of the former football field. The Speech Building shares a wall with the English Building; however, these buildings are not connected inside. Typical building occupancy consists of approximately 400 students daily during spring and fall semesters with a considerable decrease in building occupancy observed during the summer session. The two-story building envelope consists of 12’ steel reinforced concrete foundation footers, 4” steel reinforced concrete foundation slab, and un-insulated concrete masonry unit walls with a painted cement stucco exterior finish. The floors are slab-on-grade with carpet and linoleum finishes. The interior walls are 8” CMU block with painted finish. A masonry brick wainscot covers the lower surface of the hallway walls. The roof is flat, with asphalt and gravel over rigid insulation, lightweight concrete, and precast structural concrete tee. An aluminum t-grid ceiling suspension system with acoustic lay-in panels is installed over and engineered ceiling system and batt insulation. Windows are inoperable insulated tempered bronze glass. Entrances have insulated hollow metal doors with bronze tempered glass panels mounted in hollow frames. Interior doors are primarily wood mounted in a hollow metal frame. Interior vestibule doors are hollow metal with wire glass mounted in hollow frames. In 2000, a pedestrian ramp was added to the east side of the building.

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HVAC Systems

The HVAC systems serving the Clara Belle Williams (English) Building and the Speech Building were installed in 1978. There are a few (four-pipe) fan coil units serving the west side spaces in the English Building and there is a chilled water only rooftop unit serving the interconnecting spaces (Readers Lab/stage) between the buildings, but the dominant air side systems are high velocity double-duct air handlers serving (original) dual actuator constant volume mixing boxes. This system was installed as constant volume with pneumatic controls throughout. DDC has been added to the hot and chilled water plants and VSDs have been added to the pumps and large air handler fans. The fan coil units and mixing boxes remain under pneumatic control. Modification of mixing box pneumatics is evident and the (originally constant volume) boxes may be operating as variable (total) volume. DDC static pressure sensors have been added to both the cold and hot ducts and an overall static pressure setpoint value is entered as 1.00 in. water column. There may be a high signal select to control the speed of the supply fan so that the hot and cold duct pressure is a minimum of the two or an average of the two. The heating coil has less pressure drop than the cooling coil and the systems either over pressurize the hot duct or under pressurize the cold duct. The pneumatic thermostats control the cold duct damper position within the modified mixing boxes and, depending on calibration status and occupant access to setpoint control, there may be many boxes calling for full cooling and thus have their cold duct damper wide open. This would contribute to difficulty in maintaining desired static pressure in cold ducts.

. The main chilled water bypass valve was originally installed as a butterfly valve linked arrangement and that has been partially disconnected. Steam-to-hot water converters have been converted to DDC valve control.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with DDC steam valves modulated to control hot water supply temperature to the heating coils serving the unit ventilators. Two hot water pumps, both shown with future VSDs (redundant), serve the system. The hot water supply temperature setpoint is reset to 140ºF when the outdoor air temperature is25ºF and at 75ºF OAT the reset is 90ºF. The hot duct supply temperature on the double-duct units is reset from 105ºF when the outdoor air temperature is 25ºF to 70ºF when the outdoor air temperature is 75ºF. Space heating is accomplished by the hot water coils in each of the fan coil units. Local DDC space thermostats control the hot water control valve, which is two- way pneumatic, in sequence with the pneumatic chilled water control valve. Majority of space heating is delivered by hot ducts to the mixing boxes. As the pneumatic space temperature thermostat modulates the hot deck mixing box damper actuator, warm air from the hot deck is increased in volume to heat the spaces. The Reader Lab roof-mounted air handler was designed to be hot water/chilled water single-zone type air system. Alternate 6 was evidently not accepted and the hot and chilled water (source) piping was

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originally capped in the nearby mechanical room. At some later date, chilled water (only) was run out from the capping location to an added rooftop unit. This unit appears to be cooling only and serves the stage area between the English and Speech Buildings. Some heating source exists for this space and hot water piping could have been routed in a different way than originally designed. Further investigation is needed on this.

Ventilation: Since the large double-duct units have typical 100 percent outdoor air capabilities, relief fans were installed. A range was included in the south side of the Speech Building and restroom throughout the two buildings individual exhaust fans serve these areas. One of the mixing boxes discharges air into the ceiling plenum space near the (ceiling-mounted) fan coil units to supply some outdoor air to the spaces served by these fan coil units. Some of the restroom exhaust requirements are combined in a ducted system to roof-mounted vent-set type exhaust fans. Some in-line exhaust fans mounted in ceiling space provide exhaust for some areas.

Cooling: The hydronic cooling is provided by typical central plant tertiary pumping configuration, with a linked butterfly bypass control valve. The one chilled water pump is on VSD and a DDC bypass valve is shown as future. The chilled water pump is running at 100 percent speed. The fan coil units have two-way chilled water control valves and DDC two-way chilled water control valves have been added to the big double-duct units. The packaged rooftop has pneumatic two-way chilled water control valve. Control of the chilled water pump speed is being done off of a differential (water) pressure signal with a SPV of 10 psig. Cooling is being accomplished at the chilled water coils in the double-duct air handlers, the packaged rooftop unit and the fan coil units. The cold deck supply air temperature setpoints are reset from 55ºF when the outdoor air temperature is at 85ºF to 65ºF when the outdoor air temperature is at 25ºF. The fan coils modulate their chilled water coils on output of pneumatic thermostat in the space served. Free cooling via the large dampers at the double-duct units is attained up to 65ºF outdoors and then shifts to mechanical cooling.

Table B.34 provides a schedule of the available mechanical equipment installed at the Speech Building.

Table B.34. Building HVAC Schedule

Equipment Qty. Rating Service AHU21 1 3,000 CFM RTU1 1 32,500 CFM FCU16, 17 & 18 3 1,200 CFM FCU19 & 20 2 600 CFM MB 55 200 / 1600 CFM

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CF1 (Spl.) 1 22,000 / 25 CFM / MHP CF2 (Ret. / Rel.) 1 20,000 / 10 CFM / HP CC 1 32,500 / 151 CFM / GPM HC 1 25,000 / 93 CFM / GPM CC5 1 22,000 / 90 CFM / GPM CC4 1 22,000 / 81.8 CFM / GPM CHWP7 1 15 / 275 / 110 HP / GPM /Ft. hd. CHW Loop HWP8 1 5 / 200 / 55 HP / GPM /Ft. hd. HW Loop HX11 1 200 / 2000 GPM / PPH Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water voil PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout the Speech Building includes:

• Classrooms – 2 and 3 lamp T8 lay-in fixtures and incandescent can fixtures. • Offices / Conference Rooms – 3 lamp T8 lay-in fixtures. • Restrooms – 3 lamp T8 lay-in fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with a flat screen monitors and printers. Some classrooms have a projection system mounted in the ceiling. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven and other kitchen appliances. Detailed plug load survey results are available in the technical appendix.

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Building 368 – Knox Hall

Year 1981

Square Feet 75,737

Floors 3

Building Description

Knox Hall serves the College of Agriculture and Home Economics. The exterior walls are comprised primarily of metal stud exterior walls with 3.5” of R-13 fiberglass batt insulation. The exterior finish is EIFS with rigid insulation and stucco finish. The basement floor is concrete slab-on-grade. The roof surface is a reflective white built-up material over R-12 rigid insulation on lightweight concrete over metal decking. Windows are primarily store front type 1” insulated fixed glazing with bronze tint. Some of the windows are fixed while others are operable. This building includes classrooms, offices, storage rooms, laboratories, restrooms, and other miscellaneous rooms.

HVAC Systems

The HVAC systems at Knox Hall are served from the central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water pump. There is one chilled water pump used to serve the chilled water coils. The nameplate flow for the pump is 250 GPM at 54 Ft of head. The constant volume pump is powered by a 5- HP standard efficiency motor.

A hot water generator is used to transfer heat from steam to the building’s heating water systems. Condensate is returned to the central plant via an automatic steam trap (APT) and a condensate return unit (CRU). There are two hot water pumps that serve the building’s hot water coils. There pumps are also in a lead stand-by configuration. Each pump is rated at 280 GPM at 28 Ft of head and each constant- volume pump is powered by a 3-HP standard efficiency motor.

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There are six air handlers located on the building. These units are further described as follows:

AHU-1, -2 and, -3 are located in the southeast first, second, and third floor mechanical rooms respectively. These units are identical. They are single-duct variable-air-volume units with indirect-direct evaporative cooling with a chilled water coil and preheat coil. Each unit is equipped with face and bypass dampers that are no longer operable. They are also equipped with inlet guide vanes. The condition of these air handlers is considered poor. The indirect-direct evaporative coolers are no longer in service and the outside air louvers have been sealed. The cooling coils have galvanic corrosion due to the use of dissimilar piping materials at each coil’s inlet and outlet connections. The cooling coils do not have control valves.

AHU-4, -5, and -6 are located on the roof of the north wing. These package units are similar to units 1, 2 and 3. They are also single-duct variable-air-volume units with indirect-direct evaporative cooling with a chilled water coil and preheat coil. They are also equipped with inlet guide vanes. The condition of these air handlers is also considered poor. The indirect-direct evaporative coolers are no longer in service and the outside air louvers have been sealed. The cooling coils have galvanic corrosion due to the use of dissimilar piping materials at each coil’s inlet and outlet connections. There is no design data available for these units on the design drawings.

There are approximately six heating-only fan coil units serving the north perimeter spaces of the building.

The VAV terminal boxes are standard pressure independent units. These boxes range in capacity from approximately 150 to 2,000 CFM. The building also has a number of laboratory exhaust hoods and fans.

Knox Hall is primarily controlled by pneumatic controls. The building has very limited Schneider/TAC DDC system for operation of the chilled water system and hot water systems. It monitors supply fan status, pump status, and the AHU discharge temperatures. It also monitors the fish lab’s well pump, and compressor status and water temperatures and pressures.

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Table B.35. Building HVAC Schedule

Equipment Quantity Rating Service CHW Pump 1 250/54/5 GPM/FT/HP CHW Loop HW Pump 2 280/28/3 GPM/FT/HP HW Loop AHU-1 1 12,000/2.0/10 CFM/SP/HP 478,526 MBH CHW Coil - MBH HW Coil AHU-2 1 12,000/2.0/7.5 CFM/SP/HP 478,526 MBH CHW Coil - MBH HW Coil AHU-3 1 12,000/2.0/7.5 CFM/SP/HP 478,526 MBH CHW Coil - MBH HW Coil AHU-4 1 - - No Data AHU-5 1 - - No Data AHU-6 1 - - No Data Notes: HP = horsepower GPM = gallons per minute FT = Static pressure (feet) CHW = chilled water coil HW = hot water coil MBH = 1,000 BTU per hour

Lighting Systems

The predominant lighting used throughout Knox Hall includes:

• Classrooms – 2x4 3 lamp prismatic fixtures-some with existing reflectors. • Hallways - 2x4 3 lamp prismatic fixtures-some with existing reflectors and 2 lamp T8 surface box fixtures. • Offices – 2x4 3 lamp and 4 lamp prismatic fixtures. • Restrooms – 2x4 4 lamp T12 and T8 prismatic fixtures. • Exterior – Metal halide recessed cans and high pressure sodium wall pack fixtures.

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Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat screen monitor and a printer. Laboratories are equipped with a wide variety of test and measurement instruments and test fixtures. Other plug loads including copiers, a walk-in refrigerator, air compressors, fax machines, water coolers, and vending machines are in use.

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Building 386 – Business Complex

Year 1983

Square Feet 54,992

Floors 3

Building Description The Business Complex was built in 1983 and houses the College of Business. Typical building occupancy at the facility consists of approximately 900 students daily during spring and fall semesters with a considerable decrease in building occupancy observed during the summer session. The building consists of three floors above ground with a partial basement below grade. The envelope consists of steel reinforced concrete foundation walls, un-insulated concrete masonry unit walls, and a synthetic painted stucco finish on ⅝” gypsum board. The floors are slab-on-grade with vinyl or carpet finishes. The interior walls are ⅝” gypsum board over R-11 batt insulation and metal studs. The roof areas are flat with a built- up roofing system on tapered roof insulation and 2” rigid insulation over metal decking. Interior ceilings are standard acoustic lay-in panels installed in an aluminum t-grid suspension system. The windows are 1” insulated tinted glass mounted in hollow metal frames. Entrances have hollow metal, insulated doors with wire glass panels mounted in a metal frame. Interior doors are primarily wood mounted in a hollow metal frame. The building contains classrooms, offices, computer centers, storage rooms, restrooms, and other miscellaneous spaces.

HVAC Systems

The HVAC systems serving the Business Complex were installed in 1984. Other than the Terminal Room, the entire facility is served by double-duct mixing boxes. The Terminal Room has a dedicated dual cooling air handler with a chilled water coil and a DX coil (plus hot water reheat coils in the supply duct). The air handler is double-duct with separate heating and cooling fans and the Terminal Room unit is single-zone with hot water reheat. The mixing boxes are of two types –constant volume for certain spaces and variable volume for others. The double-duct supply fans were originally equipped with inlet vanes and

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pneumatic controls. The original sequences of operation for the boxes were similar, but not identical. The constant volume set-up included the hot duct side maximum heating CFM to be equal to the cooling maximum CFM. The variable boxes had a reduced heating maximum CFM. Both sequences had overlap of heating and cooling from 8-10 psig from the space thermostat. Mixed air economizer free cooling sequence controlled mixed air temperature to 55ºF up to a high limit of 75ºF. Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with 1/3 – 2/3 DDC steam valves modulated to control hot water supply temperature to the heating coils serving the air handler heating coils. The heating fan is separate from the cooling fan. One hot water pump, without VSD, serves the system. The hot water supply temperature setpoint is reset to 145ºF when the outdoor air temperature is at 35ºF and at 80ºF OAT the reset is 90ºF. The hot duct supply temperature on the double-duct units is reset from 90ºF when the outdoor temperature is at 25 F to 80ºF when the outside air temperature is at 72ºF. Space heating is accomplished by the hot duct side of the mixing boxes and by the hot water coil for the single-zone unit serving the Terminal Room. The majority of space heating is delivered by hot ducts to the mixing boxes. As the pneumatic space temperature thermostat modulates the hot deck mixing box damper actuator, warm air from the hot deck is increased in volume to heat the spaces. The maximum heating CFM volume differs between the constant volume boxes and the variable boxes. Hot water reheat coils were installed for three zones within the Terminal Room.

Ventilation: Exhaust from each floors restrooms and janitor closets are ducted-up to vent set type exhaust fan within the penthouse mechanical room. Relief hoods are present to relieve building when the system is in economizer mode. The Terminal Room unit has the economizer set-up accomplished with relief air hood and outdoor intake on the roof. The large double-duct unit has typical 100 percent outdoor air capabilities for economizer sequence and controls to 55ºF mixed air temperature up to a mixed (and outdoor air) condition of 75ºF. Cooling: The hydronic cooling is provided by typical central plant tertiary pumping configuration, with a DDC controlled bypass control valve. The two chilled water pumps shown on Niagara graphic are on VSD and a DDC bypass valve is shown. The original chilled water pump is not operational and the lead chilled water pump is running at near 100 percent speed. The single-zone unit has two-way DDC chilled water control valves. Control of the chilled water pump speed is being controlled off of a differential (water) pressure signal with a SPV of 10 psig. Cooling is being accomplished at the chilled water coils in the double-duct air handler and the

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single-zone unit. The condensing unit for the back-up DX cooling coil serving the single-zone unit is not operational. The cold deck supply air temperature setpoints on the double-duct unit are reset from 55ºF when the outdoor air temperature is at 95ºF to 65ºF when the outdoor air temperature is at 35ºF. The large three-way chilled water control valve serving the double-duct unit has had the bypass inlet blocked off with a blind flange in an attempt to operate as a two-way control valve. It also has two DDC actuators working in tandem for more torque. VSDs have been added to pumps and fans down to the air handler level. The mixing boxes have two separate pneumatic actuators controlled by space mounted pneumatic room thermostats. The boxes are pressure independent. The double-duct system was observed as running with return supply fan commanded off although VSD graphic was calling for some 33 percent speed for the return fan. The heating coil control valve was closed and the heating coil discharge was at 69ºF. There is a possibility the static pressure of the cooling supply fan is back-feeding cold duct air back down the hot duct ductwork back through the heating coil and fan and short circuiting to the return air.

VAV box retrofit may encounter limited space within the existing boxes to install Titus VAV kit.

Table B.36 provides a schedule of the available mechanical equipment installed at the Business Complex.

Table B.36. Building HVAC Schedule

Equipment Qty. Rating Service VV-1 through 7 69 200-850 CFM CV-1 3 200 CFM CV-2-4 3 350-850 CFM F1 (Cabinet Fan) 1 40610 CFM Cold F2 (Cabinet Fan) 1 33410 CFM Hot F3 (Cabinet Fan) 1 6860 CFM Computer Room. CHW1C 1 40610 / 106 CFM / GPM Unit 1 CHW2C 1 5860 / 25 CFM / GPM Unit 3 HWC2H 1 33410 / 39 CFM / GPM Unit 2 DXC4 1 5860 / 124 CFM / MBH Unit 3 Out of Svc. CU5 1 3 / 0.5 / 2 / 6.25 / 124 #CF's / CF HP / #Comp / Comp HP / MBH Unit 3 P9 1 3 / 40 / 60 HP / GPM /Ft. hd. HW P10 2 15 / 250 / 100 HP / GPM /Ft. hd. CHW(Pump Added) HX24 1 54 / 1080 GPM / PPH Hot Water HUM14 1 9 PPH Terminal Room. Notes: CHW = Chilled Water Coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower

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HW = hot water coil PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout the Business Complex Building includes:

• Classrooms - 3 lamp lay-in fixtures. • Hallways – 2 lamp lay-in fixtures and 3 lamp lay-in fixtures along with some 2 lamp wrap fixtures. • Offices – 2 lamp, 3 lamp, and 4 lamp lay-in fixtures are predominant throughout the office areas. • Restrooms – 1x4 2 lamp fixtures. • Exterior – 100w High pressure sodium can fixtures and 1 lamp cove fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break area has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Vending machines are located in a common area. Detailed plug load survey results are available in the technical appendix.

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Building 389 – Music Building

Year 1913, 1983

Square Feet 56,153

Floors 3

Building Description The Music Building, home to the Department of Music, features a recital hall, classrooms, offices, and sound-proofed rehearsal rooms. The original building was constructed in 1913. The larger addition was built in 1983. Typical building occupancy consists of approximately 250 staff and students daily during spring and fall semesters with a considerable decrease in building occupancy observed during the summer months. The original 1913 building envelope consists of concrete foundation and brick masonry walls with a stucco finish. Floors are concrete slab-on-grade covered with carpet or tile. The roof is mansard style with clay terracotta tiles installed over the pitched surface. The ceilings are exposed trusses in the recital area and standard acoustic panels in a t-grid suspension system in the office/studio spaces. The interior walls are gypsum board on wood studs with a painted finish. The windows are inoperable with ¼” reflective and 1” insulating solar bronze glass with aluminum frames. The building entrances have hollow insulated steel doors fitted with fixed glass panels mounted to steel frames. Interior doors are primarily wood.

The 1983 addition includes a two-story structure with partial basement to the south and east of the 1913 structure; a walkway connects the two structures. The building envelope consists of steel reinforced concrete foundation walls, un-insulated concrete masonry unit walls with cement stucco exterior finish. The interior is finished with painted gypsum sheathing. The windows are inoperable, ¼” reflective or 1” insulating solar bronze glass with aluminum frames. Floors are typically finished with linoleum tile or carpeting. The roof is flat with urethane foam over rigid insulation and metal decking and/or concrete. Interior doors are a combination of wood and metal mounted in hollow metal frames.

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HVAC Systems

The HVAC systems serving the Music Building were installed in 1985. The HVAC systems are a combination of fan coil units, single-zone air handlers and double-duct air handlers serving VAV boxes with pneumatic controls. Most of the system has been converted to DDC down to the air handler level. The stage area on the first floor has a dedicated air handling unit as does the seating area of the auditorium, the offices on the northwest corner, the dressing area on the west side and the practice rooms on the northwest corner of the second floor. The large double-duct systems serve the entire east side and interior spaces of the first and second floors. All the air handler systems have 100 percent outdoor air/economizer capability. The single zones do not necessarily have the heating coil before the cooling coil for freeze protection making them incapable of a de-humidification sequence. The hot and cold duct temperature setpoints are reset, as is the hot water supply temperature setpoint. The terminal units/DD VAV Boxes remain under pneumatic control but do have separate hot and cold duct damper actuators (pneumatic). The sequence for the boxes has an overlap at room setpoint and has a heating CFM at 60 percent of the cooling CFM. The mixed air controls are set at 55ºF and the switch to mechanical cooling is indicated at 78ºF OAT. The original design included three-way control valves for nearly every control valve in the system (steam valves for converter were originally two-way). Except for the fan coil units, all three-way (pneumatic) control valves have been replaced by DDC two-way control valves.

Heating: Hydronic heating is accomplished with the typical (existing) low pressure steam shell and tube heat exchangers equipped with DDC steam valves modulated to control hot water supply temperature to the heating coils serving the air handlers and fan coil units. The design includes two hot water pumps (one on VSD). The hot water supply temperature setpoint is reset at 180ºF when the outside air temperature is at30ºFand at 100ºF when the outdoor air temperature is at 80ºF. Space heating is accomplished by the hot water coils in the main air handlers distributed via the hot duct run outs to the VAV boxes. In the case of fan coils, hot water is distributed out to those units for space heating.

Ventilation: Exhaust - Facility has exhausting capability on the first floor in the dressing room, the Green Room, the restrooms within the dressing room and the public area restrooms. There is also exhaust for the department head restroom and the administrative area. On the second floor exhaust is installed for the restroom and janitors closet. In the cavity above the practice rooms a propeller type fan and dampers were installed to relieve the heat build-up above the

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practice rooms encapsulated spaces.

Cooling: The hydronic cooling is provided by typical central plant tertiary pumping configurations, with a throttling control valve controlling the return chilled water temperature to a setpoint of approximately 58ºF. The chilled water pumping systems serve the large cooling coils in the big air handling units and the fan coil units. All original pneumatic chilled water control valves have been replaced with DDC two-way control valves. The fan coil units are still under pneumatic control and have three-way control valves. The big double-duct air handlers cool the cold duct air and it is distributed to the cold side of the VAV double- duct boxes. The single-zone air handlers have cooling coils downstream from the (pre)heating coils and a constant volume of supply is distributed to the spaces. Economizer/free cooling is obtained by both types of air handlers via a return fan and 100 percent outdoor air capability. The mixed air controls have a 55ºF setpoint and mechanical cooling begins at 78ºF outdoor air temperature. The VAV boxes sequence has a small amount of overlap of heating and cooling right at setpoint but the max heating CFM is some 60 percent of maximum cooling CFM.

Table B.37 provides a schedule of the available mechanical equipment installed at the Music Building.

Table B.37. Building HVAC Schedule

Equipment Qty. Rating Service* AHU1A 1 12500 CFM Central Station AHU Supply Fan AHU2A 1 3460 CFM Central Station AHU Supply Fan AHU3A 1 12150 CFM Central Station AHU Supply Fan AHU4A 1 18600 CFM Central Station AHU Supply Fan AHU5A 1 4000 CFM Central Station AHU Supply Fan AHU6A 1 4000 CFM Central Station AHU Supply Fan RT1B 1 12500 / 5 CFM / HP Return Fan RT2B 1 3460 / 1.5 CFM / HP Return Fan RT3B 1 12150 / 5 CFM / HP Return Fan RT4B 1 18600 / 7.5 CFM / HP Return Fan RT5B 1 4000 / 2 CFM / HP Return Fan RT6B 1 9000 / 3 CFM / HP Return Fan CC1C 1 12500 / 66.1 CFM / GPM Chilled Water Coil CC2C 1 3160 / 14.2 CFM / GPM Chilled Water Coil CC3C 1 12150 / 52.7 CFM / GPM Chilled Water Coil CC4C 1 18600 / 75.2 CFM / GPM Chilled Water Coil CC5C 1 4000 / 16.9 CFM / GPM Chilled Water Coil CC6C 1 9000 / 32.3 CFM / GPM Chilled Water Coil

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HC1D 1 12500 / 26.6 CFM / GPM Hot Water Coil HC2D 1 3160 / 6.2 CFM / GPM Hot Water Coil HC3D 1 7300 / 13.4 CFM / GPM Hot Water Coil HC4D 1 11600 / 19.7 CFM / GPM Hot Water Coil HC5D 1 4000 / 7.5 CFM / GPM Hot Water Coil HC6D 1 9000 / 14.9 CFM / GPM Hot Water Coil VV-119 through 238 (VAV) 33 130-2400 CFM Variable Air Box CV-151, 153, 230 & 233 (VAV) 4 210-470 CFM Constant Volume Box HUM1E 1 90 PPH Steam Humidifier HUM2E 1 20 PPH Steam Humidifier HUM3E 1 60 PPH Steam Humidifier HUM4E 1 90 PPH Steam Humidifier HUM6E 1 50 PPH Steam Humidifier EF11 1 420 / 1/6 CFM / HP Exhaust Fan EF12 1 700 / 1/6 CFM / HP Exhaust Fan EF13 1 1720 / 1/3 CFM / HP Exhaust Fan EF13B 1 1500 / 1/6 CFM / HP Exhaust Fan EF13C 1 90 / 1/25 CFM / HP Exhaust Fan VFCU14 through 25 12 570, 650 & 775 CFM Fan Coil Unit P26 1 3 / 106 / 50 HP / GPM /Ft. hd. Hot Water Pump P27 1 7.5 / 315 / 50 HP / GPM /Ft. hd. Chilled Water Pump Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil PPH = pounds per hour

Lighting Systems

The predominant lighting used throughout the Music Building includes:

• Auditorium – Incandescent hat and track fixtures with some LED cans. • Classrooms – 2x4 4 lamp lay-in fixtures, 2 and 4 lamp T8 surface box fixtures, and 2 lamp T12 and T8 wrap fixtures. • Hallways – 2x4 2 lamp T8 lay-in fixtures and LED cans. • Offices – 2x4 4 lamp lay-in fixtures. • Restrooms – 1 lamp T8 vanity fixtures.

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• Exterior – High pressure sodium wall pack fixtures.

Plug Load Equipment The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a small refrigerator, a microwave oven, coffee makers, and other kitchen appliances. Detailed plug load survey results are available in the technical appendix.

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Building 391 – Science Hall

Building Description

Year 1987

Square Feet 114,918

Floors 3

Science Hall is comprised primarily of 6” metal stud exterior walls with R-19 fiberglass batt insulation. The exterior finish is EIFS, stucco on 1” rigid insulation over ⅝” exterior gypsum board. Floors are concrete slab-on-grade. The roof surface is a ballasted membrane over 3” rigid insulation with ⅝” gypsum board over metal decking. Windows are primarily 1” insulated fixed glazing with solar gray tint. This building serves the computer science, mathematics, psychology departments, and the Computing Research Laboratory. The building includes classrooms, offices, lecture room, storage rooms, laboratories, restrooms, and other miscellaneous rooms.

HVAC Systems

The HVAC systems at Science Hall are served from central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water tertiary pumps. There are two 25-HP chilled water pumps equipped with VFDs. These pumps are in a lead/standby arrangement and modulate to meet the chilled water static pressure setpoint. The pumps are not equipped with a chilled water pump bypass. The building is equipped with a modulating control valve on the chilled water return loop. A hot water generator is used to transfer heat from steam to the building’s hot water system. Condensate is returned to the central plant via an automatic steam trap (APT) and a condensate return unit (CRU). There is one 1.5-HP constant volume hot water pump. The chilled and hot water pumps have premium efficiency motors and the hot water pump has a standard efficiency motor.

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A single built-up dual-duct VAV air handler is located in the penthouse. This unit has two airfoil supply fans on the cold deck powered by 60-HP motors. Each fan controls to the static pressure setpoint with a VFD. Each of the cold deck supply fans has a capacity rating of 65,000 CFM at 4.6” total static pressure. Each of the two cooling coils has a rating of 3,230.1 MBH. The hot deck includes one McQuay airfoil fan powered by a 50-HP motor with VFD static pressure control. The hot deck supply fan has a rating of 35,680 CFM at 4.84” total static pressure. The heating coil has a design capacity of 1,340.8 MBH. There are two return relief fans located in the penthouse. Each fan is a vane axial unit with pneumatic variable pitched blades for volume control. Each return fan has a capacity of 65,000 CFM at 1.12” total static pressure and has a 20-HP motor. The main air handler is equipped with a mixed air economizer. All of the dual-duct terminal boxes are equipped with pneumatic “Trox” type actuators. There is currently a separate actuator on the hot and cold deck of each box.

Although the main AHU looks to be in good condition, there were several issues indicating that retro- commissioning is needed. For example, the 6” three-way pneumatic cooling coil control valve was not modulating and in the fully open position. The cold deck discharge air temperature was controlled using the modulating return valve located in the basement. Many of the outside air damper linkages and actuators are not connected so multiple damper sections fail to modulate or are stuck in the closed position, which was found to limit the outside air volume under economizer operating conditions. There is an unusual wood framed partition blocking a large portion of the outside air intake. Spot checks found that the hot deck fan operates when it should be off and the hot deck discharge air temperature was not properly resetting with outside air temperature.

Server Room 223 is cooled by a constant volume single-zone McQuay AHU located in the adjacent room. This unit has no outside air and simply recirculates air for the server room. It provides cooling only and is equipped with a chilled water coil with a two-way chilled water control valve. The supply fan motor is a 5-HP high efficiency motor. This unit also has a DX cooling coil that is used for emergency back-up if chilled water is not available. The condensing unit is a 10-ton BDP unit with significant hail damage to the condenser coil. It was noted that this condensing unit was cycling on while chilled water was available at the air handler. Although the unit is in poor condition, its use should be limited to periods without chilled water. This is also a retro-commissioning candidate.

Science Hall is equipped with a TAC Xenta DDC system. This system is used to control the chilled and hot water pumps and the main air handler. All of the dual-duct mixing boxes have pneumatic controls. The control system provides for typical sequences including equipment scheduling, chilled water static pressure control, equipment start and stop, cold deck and hot deck reset, supply fan static pressure control, economizer and other sequences. The building’s DDC system is connected to the campus Niagara system over the wide area network.

Table B.39. Building HVAC Schedule

Equipment Quantity Rating Service CHW Pump 2 585/95/25 GPM/FT/HP CHW Loop

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HW Pump 1 70/40/1.5 GPM/FT/HP HW Loop Main AHU 2 65,000/4.6/60(2) CFM/SP/HP Cooling Supply Fan 1 35,000/4.84/50 CFM/SP/HP Heating Supply Fan 1 3,230.1 MBH CHW Coil 1 1,340.8 MBH HW Coil Server AHU 1 10 Ton Server Room 223 Rooftop Unit 1 4 Ton Third Floor. Office Notes: CHW = chilled water coil HW = hot water coil MBH = 1,000 BTU per hour GPM = gallons per minute HP = horsepower CFM = cubic feet per minute SP = static pressure in inches W. G. Ton = 12,000 BTU per hour

Lighting Systems

The predominant lighting used throughout Science Hall includes:

Classrooms – 3 and 4 lamp T12 lay-in prismatic, paracube, and box style fixtures.

Offices / Conference Rooms – 2, 3, and 4 lamp T12 lay-in prismatic and paracube fixtures.

Hallways – 2 lamp T12 lay-in and box fixtures and metal halide can fixtures.

Restrooms – 2 lamp T8 vanity and wrap fixtures.

Exterior – High pressure sodium cans and wall packs along with a few metal halide canopy fixtures.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a LCD monitor and a printer. The rest of the building consists of typical classroom and office building plug load equipment including copiers, fax machines, water coolers, vending machines, and laboratory equipment. There is also a server room located on the second floor and a computer room located on the first floor.

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Building 397 - John Whitlock Hernandez Hall

Year 1988

Square Feet 44,107

Floors 2

Building Description

The John Whitlock Hernandez Hall is also known as Engineering Complex II (EC-II). Typical building occupancy at EC-II consists of approximately 400 students daily during spring and fall semesters, with a considerable decrease in building occupancy during the summer session. The building is comprised primarily of metal stud exterior walls with 6” of fiberglass batt insulation. The exterior finish is synthetic stucco on 1½” rigid insulation over ½” exterior gypsum board. Floors are concrete slab-on-grade. The roof surface is a modified bitumen membrane over 3” rigid isocyanurate insulation on metal decking. Windows are primarily 1” insulated fixed glazing with bronze tint. This building serves the civil, agricultural, and geological engineering departments and includes classrooms, offices, storage rooms, laboratories, restrooms, and other miscellaneous rooms.

HVAC Systems

The HVAC systems at EC-II are served from the central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water pump. There is one 3-HP chilled water pump equipped with a VFD. There are two-way chilled water control valves and the pump maintains a single static pressure setpoint. EC-II is not equipped with a chilled water pump bypass or a modulating control valve on the return loop. A hot water generator is used to transfer heat from steam to the building’s heating

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water and domestic hot water systems. Condensate is returned to the central plant via an automatic steam trap, (APT) and a condensate return unit (CRU). There is one .75-HP hot water pump equipped with a VFD and the heating control vales are two-way valves. The chilled and hot water pumps both have standard efficiency motors.

There are two AHUs that are used to serve the building. These include an eight-zone constant volume multi-zone system and a dual-duct VAV system. Both units are located in the EC-II penthouse.

The Pace multi-zone unit (AHU-1) is used to serve the laboratory areas throughout the building. This unit is equipped with DDC controls and field devices. The unit’s airfoil supply fan produces 15,500 CFM at 2.75” static pressure and is equipped with a 15-HP standard efficiency supply fan motor. The airfoil return fan is equipped with a 5-HP standard efficiency motor. Both motors are located within the airflow. According to the as-built drawings the design cooling capacity is 518.7 MBH and the design heating capacity is 249.6 MBH. Each of the eight zones is controlled by a single DDC actuator. This unit is also equipped with a mixed air economizer: however, during the site visit it was noted that the unit was running in the economizer mode but the relief dampers were closed. This indicates that retro-commissioning may be beneficial.

The Pace dual-duct VAV air handler (AHU-2) serves the balance of the building including the common areas, classrooms, and offices. This unit is equipped with DDC controls and field devices. AHU-2 uses the mechanical penthouse as its return air plenum. The unit consists of two separate fan units for cold and hot deck supplies. The cold deck supply fan (SF-1) is equipped with a 25-HP high efficiency motor with modulating VFD control. The hot deck supply fan (SF-2) is equipped with a 20-HP high efficiency motor with modulating VFD control. Both fans are airfoil design and the motors are located within the air flow. AHU-2 has two-way cooling and heating valves. According to the as-built drawings the design cooling capacity is 745.2 MBH and the design heating capacity is 317.6 MBH. The cooling design air flow is 25,450 CFM and the heating design airflow is 16,970 CFM at with 4.0” static pressure. This unit is equipped with a mixed air economizer.

All of the 39 dual-duct terminal mixing boxes on this air handler are pneumatically controlled. The laboratory areas are equipped with fume hoods.

This building is equipped with Schneider/TAC DDC system for operation of the chilled water system, hot water system and each air handler. The DDC system does not extend to the zone level on AHU-2 where all of the terminal boxes have pneumatic actuators. Standard DDC functions including equipment schedules, economizer control, hot and cold deck reset, chilled water static pressure control, fan static pressure control, and other sequences are employed.

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Table B.40. Building HVAC Schedule

Equipment Quantity Rating Service CHW Pump 1 202/35/3 GPM/FT/HP CHW Loop HHW Pump 1 57/25/.75 GPM/FT/HP HW Loop AHU-1 1 15,500/1.7/15 CFM/SP/HP Laboratories 518.7 MBH CHW Coil 247.6 MBH HW Coil AHU-2 1 25,450/4.0/25 CFM/SP/HP Classrooms, Offices 1 16,970/4.0/20 CFM/SP/HP Classrooms, Offices 745.2 MBH CHW Coil AHU-2 1 317.6 MBH HW Coil Notes: HP = horsepower MBH = 1,000 BTU per hour GPM = gallons per minute CFM = cubic feet per minute FT = pump head in feet SP = static pressure in inches W. G. CHW = chilled water coil HW = hot water coil

Lighting Systems

The predominant lighting used throughout John Whitlock Hernandez Hall includes:

• Classrooms – 2x4 4 lamp 40w T12 prismatic fixtures

• Hallways – 100w Metal halide recessed cans, 4’ 2 lamp 40w T12 prismatic fixtures, 4’ 2 lamp 40w T12 cove fixtures, and 2x4 4 lamp 40w T12 prismatic fixtures

• Labs – 4’ 2 lamp 40w T12 wrap fixtures

• Offices – 2x4 4 lamp 40w T12 prismatic fixtures

• Restrooms – 4’ 2 lamp 40w T12 cove fixtures

• Exterior – 100w Metal halide recessed cans and 50w Metal halide wall pack fixtures

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Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat screen monitor and a printer. Laboratories are equipped with a wide variety of test and measurement instruments and test fixtures. Other plug loads including copiers, fax machines, water coolers, and vending machines are in use. Detailed plug load survey results are available in the technical appendix.

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Building 461 - Zuhl Library

Year 1992

Square Feet 95,952

Floors 3

Building Description The Zuhl Library was built in 1992 and houses the University arts, humanities, and sciences collections. The building is three stories with a basement below grade. The envelope consists of a reinforced concrete foundation walls, reinforced concrete structural piers with an exterior wall insulation/finishing system fitted over gypsum board, metal studs, and R-19 batt insulation. The floors are a concrete slab-on-grade covered with carpet tile or carpet. The roof is flat with a built-up roof on insulating precast concrete structural tees and rigid insulation. The ceilings are primarily standard acoustic, lay-in panels on t-grid suspension system. The interior walls are gypsum board on metal stud with a painted finish. Windows are finned with 1”insulating glass in an aluminum frame. The entrances have hollow insulated steel doors fitted with fixed glass panels mounted to steel frames. Interior doors are primarily wood. The interior doors are a combination of wood, hollow metal, or steel. The energy management system was first upgraded in 1981

HVAC Systems

The HVAC systems serving Zuhl Library were installed from a 1990 design. It included two centrally located double-duct units serving almost all double-duct VAV terminal units and is DDC controlled clear down to the space temperature control. It modulates the return fan to maintain a slight building positive pressure and even ventilates the skylight cavities with the positive building pressure. The hot and cold decks of the double-duct units have separate supply fans matched to the coils they serve. A separate third fans acts as the return fan and the system is capable of using outdoor air for free cooling. The VAV terminal unit design sequence includes overlap of cooling and heating and may be an opportunity for modification with return air override. The sequence predicates attaining 55ºF mixed air temperature as the switchover point to mechanical cooling.

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Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with a DDC actuated steam valves modulated to control hot water supply temperature to the heating coils The hot water supply temperature setpoint is reset via DDC controls to 175ºFwhen the outdoor air temperature is 35ºF and to 110 when the outdoor air temperature is 85ºF. The steam-to-hot water heat exchanger/converter is served by two modulating steam valves in a 1/3 – 2/3 arrangement. The heating sections of the big double-duct units modulate three-way DDC valves to reset the hot deck temperature setpoint from 120ºF when the outdoor air is 35ºF to 80ºFwhen the outdoor air temperature is 80ºF. Ventilation: Exhaust is performed by four exhaust fans, one of which is dedicated to the elevator equipment room and controlled by a thermostat within that room. That air is blown into the main mechanical room and is made up from the same mechanical space. First floor restrooms on the south side of the floor are exhausted by dedicated in-line exhaust up in the ceiling nearby and ducted through the wall and louver. The north restrooms are exhausted by a roof-mounted power ventilator via exhaust duct riser. The second and third floor restrooms on the north side of the floors pat into that exhaust riser. The third floor has temperature sensors in the skylight cavities which open dampers and use the positive building pressure to force the hot air out of the building. The return fans on the main air handling equipment are modulated to maintain a slight positive building pressure. A relief vent on the south side of the roof allows venting of excess outdoor air during economizer operation to leave the building.

Cooling - Cooling is accomplished by the big double-duct air handlers in the main mechanical equipment room. The units are capable of utilizing outdoor air, during certain conditions, for free cooling The cooling coils are running wild and chilled water flow is controlled by the building chilled water bypass valve to control return chilled water at 56ºF (design). The switchover to mechanical cooling occurs when economizer can no longer maintain 55ºFcooling coil discharge. The VAV terminal units have an overlap of heating and cooling from about ¾ below to 1.0 above setpoint. This may have been done to assure inherent space relative humidity control. The cold deck setpoint is reset from 68ºF when the outdoor air temperature is 35ºF to 60ºFwhen the outdoor air temperature is 90ºF. Table B.41 provides a schedule of the available mechanical equipment installed at the Zuhl Library.

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Table B.41. Building HVAC Schedule

Equipment Qty. Rating Service AHU5 & 6 (htg.) 2 16500 CFM Central Station Heating Units TU 102 0-2,800 CFM Terminal Units SD/DD CF1 & 2 2 56000 / 75 CFM / HP Centrifugal Supply Fan CF3 & 4 2 50000 / 25 CFM / HP Tubular Cent. Ret. Fans CC12 & 13 2 56000 / 280 CFM / GPM Chilled Water Cooling Coils HC5 & 6 2 16500 / 66 CFM / GPM Hot Water Heating Coils P25A & 25B 1 7.5 / 560 / 30 HP / GPM / Ft. hd. Chilled Water pump P26 1 3 / 132 / 40 HP / GPM / Ft. hd. Hot Water Pump HX24 1 132 / 1320 GPM / MBH Heat Exchanger VFD17 & 18 2 75 / 88.6 HP / AMPS Supply Fans VFD19 & 20 2 25 / 32.5 HP / AMPS Return Fans VFD20 & 21 2 15 / 20.6 HP / AMPS Central Station Supply Fans Notes: AMP = amperes CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil MBH = 1,000 BTU per hour

Lighting Systems

The predominant lighting used throughout the Zuhl Library includes:

• Main Library Area/Stacks – 3 lamp 40w biax lay-in parabolic fixtures along with 1 lamp T8 direct/indirect fixtures with occupancy sensors are the main lighting throughout the library. There are also recessed cans with CFL PL lamps. • Offices – 3 lamp 40w lay-in parabolic fixtures, recessed cans with CFL PL lamps, and 4 lamp T8 tube lighting was most prevalent in these areas. • Restrooms – 2 lamp T12 cove lighting with some existing occupancy sensors. • Exterior – Recessed LED screw in lamps and a metal halide wall pack were identified.

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Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Detailed plug load survey results are available in the technical appendix.

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Building 541 – Ed and Harold Foreman Engineering Complex III

Year 1997

Square Feet 84,526

Floors 3

Building Description

The Ed and Harold Foreman Engineering Complex III is also known as Engineering Complex III (EC-III). The building houses the Engineering Technology Department. The exterior walls are comprised primarily of metal stud exterior walls with 6” of fiberglass batt insulation. The exterior finish is constructed of stucco over a ⅝” exterior gypsum board. The ground floor is concrete slab-on-grade. The roof surface is a reflective white single membrane material over R-30 rigid insulation on metal decking. Windows are primarily store front type 1” insulated fixed glazing with bronze tint. This building includes classrooms, offices, storage rooms, laboratories, restrooms, and other miscellaneous rooms.

HVAC Systems

The HVAC systems at EC-III are served from the central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water pump. There are two chilled water pumps in a lead stand-by configuration to serve the chilled water coils. The pumps are insulated; therefore, the nameplates are not accessible. The design flow for each pump is 460 GPM at 50 Ft of head. Each of the two pumps is powered by a 10-HP high efficiency motor and the pump speed is controlled by VFDs. There is a chilled water bypass valve located on one pump that enables bypass and isolation of the chilled water pumps.

A hot water generator is used to transfer heat from steam to the building’s heating water systems. Condensate is returned to the central plant via an automatic steam trap (APT) and a condensate return unit (CRU). There are two hot water pumps that serve the building’s hot water coils. There pumps are also in a lead stand-by configuration. Each pump is rated at 179 GPM at 50 Ft of head and each pump is powered by a 5-HP high efficiency motor. Pump speed is controlled by VFDs.

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There are five air handlers located on the roof of the building. These units are further described as follows:

AHU-1 is located on the northwest wing of the building. This unit is a single-duct VAV system with a cooling coil only. It is equipped with a mixed air economizer. The 25-HP supply and the 7.5-HP return fans are equipped with VFDs. This unit has a design capacity of 14,800 CFM at 2.55 in WG and the design cooling capacity is 423.6 MBH.

AHU-2 is located on the south wing of the building. This unit is a single-duct VAV system with a cooling coil and heating coil. It is equipped with a mixed air economizer. The 40-HP supply and the 7.5-HP return fans are equipped with VFDs. This unit has a design capacity of 26,500 CFM at 3.0 in WG and the design cooling capacity is 998.4 MBH. The design heating capacity is 174 MBH. The economizer does not appear to work correctly on this unit.

AHU-3 is located on the southwest wing of the building. This unit is a single-duct VAV system with a cooling coil and heating coil. It is equipped with a mixed air economizer. The 10-HP supply and the 3-HP return fans are equipped with VFDs. This unit has a design capacity of 7,300 CFM at 2.55 in WG and the design cooling capacity is 217.2 MBH. The design heating capacity is 68 MBH.

AHU-4 is located on the northeast wing of the building. This unit is a single-duct VAV system with a cooling coil only. It is equipped with a mixed air economizer. The 40-HP supply and the 15-HP return fans are equipped with VFDs. This unit has a design capacity of 28,700 CFM at 3 in WG and the design cooling capacity is 726 MBH.

AHU-5 is also located on the northwest wing of the building adjacent to AHU-1. This unit is a single-duct VAV system with a cooling and heating coil. It is equipped with a mixed air economizer. The supply and the return fans are equipped with VFDs. There is no available design data for this unit shown on the drawings.

AHU-6 is located on the central core of the building. This unit is a single-duct VAV system with a cooling coil only. It is equipped with a mixed air economizer. The supply and the return fans are equipped with VFDs. There is no available design data for this unit shown on the drawings.

There are approximately 72 VAV terminal boxes. All of the VAV terminal boxes are parallel fan powered units with reheat. These boxes range in capacity from approximately 140 to 1400 CFM. The building also has a number of laboratory exhaust fans.

This building is equipped with Schneider/TAC DDC system for operation of the chilled water system, hot water system and each air handler. The DDC system also extends to the zone level on all of the air handlers. Standard DDC functions including equipment schedules, economizer control, hot and cold deck reset, chilled water static pressure control, fan static pressure control and other sequences are employed.

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Table B.42. Building HVAC Schedule

Quantit Equipment y Rating Service CHW Pump 2 460/50/10 GPM/FT/HP CHW Loop HW Pump 2 179/50/5 GPM/FT/HP HW Loop AHU-1 1 14,800/2.55/25 CFM/SP/HP 423.6 MBH CHW Coil AHU-2 1 26,500/3/40 CFM/SP/HP 998.4 MBH CHW Coil 174.0 MBH HW Coil AHU-3 1 7,300/2.6/10 CFM/SP/HP 217.2 MBH CHW Coil 68 MBH HW Coil AHU-4 1 28,700/3/40 CFM/SP/HP 726 MBH CHW Coil AHU-5 1 - CFM/SP/HP - MBH CHW Coil - MBH HW Coil AHU-6 1 - CFM/SP/HP - MBH CHW Coil Notes: HP = horsepower GPM = gallons per minute CFM = cubic feet per minute SP = static pressure in inches of W. G. FT = static pressure (Feet) CHW = chilled water coil HW = hot water coil MBH = 1,000 BTU per hour

Lighting Systems

The predominant lighting used throughout Engineering Complex III includes:

• Classrooms – 3 lamp T8 indirect/direct fixtures and 2x4 3 lamp T12 and T8 prismatic and parabolic fixtures.

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• Hallways – Various fixture types including metal halide up lights, CFL can lights, and 3 lamp T8 (2’, 3’ and 4’) indirect/direct fixtures. • Labs – 2 lamp T12 and T8 Industrial fixtures and 3 lamp indirect/direct fixtures. • Offices – 3 lamp T8 indirect/direct fixtures and 2x4 3 lamp T12 and T8 prismatic and parabolic fixtures. • Restrooms – 2 lamp 2’, 3’ and 4’ strip fixtures recessed in coves. • Exterior – Metal halide up lights and wall packs.

Plug Load Equipment

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Building 551 – Skeen Hall

Year 1999

Square Feet 135,896

Floors 3

Building Description

Skeen Hall is the newest building in the College of Agriculture and Home Economics. There are two wings to this three-story structure separated by the rotunda. The east wing serves as the office wing and the south wing serves as the laboratory wing. The west wing includes green house facilities. The laboratory wing generally includes student and graduate student laboratories. The office wing includes typical open and executive offices. There is a partial basement that includes the utility services and the conditioned penthouse includes the mechanical rooms.

The exterior walls are comprised primarily of metal stud exterior walls with 6” of fiberglass batt insulation. The exterior finish is EIFS stucco over ⅝” exterior gypsum board. The ground floor is concrete slab-on-grade. The roof surface is a clay tile over 4” rigid polyisocyanurate insulation over metal decking. The west roof is flat with a white reflective roof membrane over 4” rigid insulation and metal decking. Windows are primarily store front type 1” insulated fixed glazing with bronze tint and aluminum frame. This building includes classrooms, offices, storage rooms, laboratories, restrooms, and other miscellaneous rooms.

HVAC Systems

The HVAC systems at Skeen Hall are served from the central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water pumps. There are two chilled water pumps in a lead stand-by configuration to serve the chilled water coils. The design flow for each pump is 600 GPM at 80 Ft of head. Each of the two pumps is powered by a 20-HP high efficiency motor and the pump speed is controlled by VFDs. A hot water generator is used to transfer heat from steam to the building’s heating water systems. Condensate

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is returned to the central plant via an automatic steam trap (APT) and a condensate return unit (CRU). There are two hot water pumps that serve the building’s hot water coils. The pumps are also in a lead stand-by configuration. Each pump is rated at 800 GPM at 80 Ft of head and each pump is powered by a 25-HP high efficiency motor. Pump speed is controlled by VFDs.

There are six air handlers located in the west and main penthouses of the building. These units are further described below.

AHU-1, -2, and -3 are similar in design and serve the laboratory areas of the building. These are critical pressure units. AHU-1 and -2 are of equal design capacity and AHU-3 is smaller in capacity. The design capacity information for each unit is listed in the Building HVAC Schedule shown below. There are a large number of fume hoods in the laboratories. These AHUs utilize 100 percent outside air and include heat pipe air-to-air heat recovery systems located between the building’s supply and exhaust plenums. These AHUs are single-duct VAV systems with reheat. Each air handler also has a preheat coil, cooling coil, an air washer, and face and by-pass dampers. There are two supply fans and two exhaust fans associated with each unit. VFDs are used to control supply fan and return fan speeds. A dispersion damper located between the supply and exhaust plenum is used to maintain stack velocities in the exhaust system. The laboratories are equipped with fume hoods. The exhaust for each hood is controlled with a Phoenix valve to maintain a constant exhaust volume. Supply air to each zone is provided by a VAV terminal box with reheat coils.

AHU-1, -2 and, -3 are equipped with interlocked exhaust fans to control building static pressure. The laboratory fume hoods are equipped with constant volume Phoenix air valves. The laboratories are also equipped with air valves for general exhaust. The supply air terminal units automatically change setpoints when the general exhaust fans are manually switched on or off so as to meet the airflow associated with the general exhaust volume.

AHU-4 serves the east office wing. This unit is a single-duct, VAV air handler with terminal reheat coils. The supply and return fans are controlled with VFDs. This air handler is also equipped with a mixed air economizer.

AHU-5 and -6 are small single-duct systems. AHU-5 is a constant volume system with heating and cooling coils and a dedicated exhaust fan. AHU-6 is a single-duct VAV system with one supply fan controlled by a VFD and a mixed air economizer. It also has a heating and a cooling coil.

There are five small fan coil units used to serve mechanical, electrical, and elevator rooms. These units typically range from 700 to 3,000 CFM and 1- to 2-HP.

This building is equipped with Schneider/TAC DDC system for operation of the chilled water system, hot water system, and each air handler. The DDC system also extends to the zone level on all of the air handlers. Standard DDC functions including equipment schedules, economizer control, hot and cold deck

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reset, chilled water static pressure control, fan static pressure control and other sequences are employed.

During the audit it was determined that many of the terminal VAV controllers have failed pressure transducers that are needed to measure terminal unit air flow (CFM). A small number of zone controllers have been replaced; however, a large number of units are operating without control to the airflow setpoint.

Table B.42. Building HVAC Schedule

Equipment Quantity Rating Service CHW Pump 2 600/80/20 GPM/FT/HP CHW Loop HW Pump 2 800/80/25 GPM/FT/HP HW Loop AHU-1 1 60,000/6/50(2) CFM/SP/HP(QTY) Laboratories 2,400 MBH CHW Coil 2,800 MBH HW Coil AHU-2 1 60,000/6/50(2) CFM/SP/HP(QTY) Laboratories 2,400 MBH CHW Coil 2,800 MBH HW Coil AHU-3 1 12,000/6/25(2) CFM/SP/HP(QTY) Laboratories 489 MBH CHW Coil 600 MBH HW Coil AHU-4 1 50,000/5.5/75 CFM/SP/HP Offices 1,400 MBH CHW Coil 1,331 MBH HW Coil AHU-5 1 1,500/3.5/3 CFM/SP/HP General 40 MBH CHW Coil 45 MBH HW Coil AHU-6 1 1,500/3.5/3 CFM/SP/HP General 40 MBH CHW Coil 45 MBH HW Coil Notes: HP = horsepower GPM = gallons per minute CFM = cubic feet per minute SP = static pressure in inches W. G. FT = static pressure (feet) CHW = chilled water coil HW = hot water coil MBH = 1,000 BTUH

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Lighting Systems

The predominant lighting used throughout Skeen Hall includes:

• Classrooms – 3 lamp T8 indirect fixtures and 4 lamp T8 lay-in fixtures were mostly identified. • Hallways – CFL PL can fixtures, 1 lamp T8 cove fixtures and 2 lamp T8 wrap fixtures were most prevalent in the common areas. • Offices/Conference Rooms – 3 lamp T8 indirect fixtures. • Restrooms – CFL PL can fixtures and 2 lamp T8 lay-in parabolic cove fixtures. • Storages – There were a lot of different fixture and lamp types in the storage areas such as incandescent recessed fixtures, 2 lamp T8 box fixtures, 2 lamp T8 weatherproof wraps, 3 lamp T8indirect fixtures, and 4 lamp T8 lay-in fixtures. • Exterior – High pressure sodium can fixtures along with CFL step lights.

Plug Load Equipment

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Building 585 – Wooton Hall (Jornada)

Year 2002

Square Feet 30,492

Floors 2

Building Description

Wooton Hall serves the USDA-ARS Jornada Research Program. The Wooton Hall Building’s envelope has exterior walls that are primarily 6” metal stud construction with R-19 fiberglass batt insulation. The exterior finsish is stucco over ½” gypsum sheathing. The interior walls are 6” metal stud with ⅝” gumsum board finish. The floors are slab-on-grade with vinyl or carpet finishes. The ceilings are primarily of acoustical panels. The perimiter exterior roof surface is sloped and covered with clay tiles. These areas have an unconditioned attic space over R-30 fiberglass batt and metal decking. The core roof area is flat with single membrane surface over rigid insulation. Windows are primarily aluminum storefront with insulated tinted glass. The building contains offices, study rooms, storage rooms, conference rooms, and laboratories.

HVAC Systems

The HVAC systems at Wooton Hall are served from central plant chilled water and steam systems. Chilled water is piped and pumped from the central chilled water campus loop to HVAC systems using the building’s chilled water pumps. There are two 10-HP chilled water pumps equipped with a VFD. These pumps are in a lead/stand-by arrangement and modulate to meet the chilled water static pressure setpoint. The pumps are not equipped with a chilled water pump bypass. The building is equipped with a modulating control valve on the chilled water return loop. A hot water generator is used to transfer heat from steam to the building’s hot water system. Condensate is returned to the central plant via an

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automatic steam trap (APT) and a condensate return unit (CRU). There are two 15-HP constant volume hot water pumps and two 5-HP constant volume preheat coil pumps. All chilled and hot and water pumps have standard efficiency motors. Domestic hot water is also served from a hot water generator with a storage tank and a fractional horsepower circulating pump.

There are five rooftop air handlers. All of the AHUs are single-duct VAV with terminal reheat coils. All of the AHUs are also equipped with VFDs. Two of these units, (AHU-1 and -2) are used to serve the laboratory spaces. These units provide 100 percent outside air and are equipped with heat recovery from general Exhaust Fans EF-1, -1A, -2 and,-2A. These exhaust fans are in a lead/stand-by arrangement and are equipped with VFDs. The heat recovery system is a run around loop that is used as the first stage of heating for the air handlers. All of the air handlers are equipped with hot and chilled water coils. AHU -3, -4, and -5 serve general spaces and are equipped with mixed air economizers. All of the chilled and hot water control valves are two-way valves and the heat recovery coil valves are three-way valves. Additionally, there are five hot water duct booster coils serving each air handler ahead of the terminal VAV boxes. All of the AHUs are equipped with airflow stations and the VFDs modulate to maintain both CFM and static pressure setpoints.

In addition to the primary air handlers there are eight, small four-pipe fan coil units that serve utility areas. There are also two 2.5-ton split DX units serving dedicated loads with stand-alone controls.

During the inspection, it was noted that on AHU-1 the heat recovery and preheat coil control valves were open at the same time the chilled water control valve was open. It was also noted that the relief damper on AHU-4 was stuck in the open position. The heating and cooling control valves on all AHUs were found to be searching and never maintained a fixed position. All of the fume hoods were empty but all of the exhaust fans were found on. The control sequence of operation indicates that during unoccupied periods, the air flow for AHU – 1 and -2 should be reduced by 50 percent together with the flow for EF-1 and -2. However, trend logs indicate that only AHU-1 achieves 50 percent and EF-1 and -2 maintain 100 percent fans speeds during unoccupied periods. Each of these issues suggests that retro-commissioning would be of value at Wooton Hall.

All of the mechanical equipment throughout the building including the heating and cooling pumps, air handling equipment, and zone level controls are under TAC Xenta DDC controls.

Table B.43. Building HVAC Schedule

Equipment Quantity Rating Service CHW Pump 1, 2 2 266/85/10 GPM/HD/HP Chilled Water HWP 1, 2 2 440/86/15 GPM/HD/HP Hot Water

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HRP 1, 2 2 60/65/3 GPM/HD/HP Heat Recovery AHU 1 1 8,463/4.2/15 CFM/TSP/HP Laboratories AHU 2 1 9,066/4.4/15 CFM/TSP/HP Laboratories AHU 3 1 7,190/4.3/10 CFM/TSP/HP Offices AHU 4 1 6,559/4.2/7.5 CFM/TSP/HP Offices AHU 5 1 7,370/4.2/10 CFM/TSP/HP Offices EF 1, 1A 2 9,940/2.0/10 CFM/TSP/HP General Exhaust EF 2, 2A 2 10,425/2.0/10 CFM/TSP/HP General Exhaust EF 3, 3A 2 1,800/1.3/2 CFM/TSP/HP Fume Hoods EF 4, 4A 2 1,800/1.3/2 CFM/TSP/HP Fume Hoods Notes: GPM = gallons per minute CFM = cubic feet per minute HP = horsepower HD = head (feet) TSP = total static pressure in Inches W.G. CFM = cubic feet per minute

Lighting Systems

The predominant lighting used throughout Wooton Hall includes:

• Hallways – CFL PL can fixtures, 1 lamp T8 cove fixtures and 2 lamp T8 wrap fixtures were most prevalent in the common areas. • Offices / Conference Rooms – 3 lamp T8 fixtures. • Restrooms – CFL PL can fixtures and 2 lamp T8 lay-in parabolic cove fixtures. • Storages – There were different fixture and lamp types in the storage areas such as incandescent recessed fixtures, 2 lamp T8 box fixtures, 2 lamp T8 weatherproof wraps, 3 lamp T8 indirect fixtures, and 4 lamp T8 lay-in fixtures. • Exterior – High pressure sodium can fixtures along with CFL step lights.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a LCD monitor and a printer. The rest of the building consists of typical office building plug load equipment including, copiers, fax machines, and water coolers. The laboratories are equipped with a variety of test

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and measurement instrumentation. Wooton Hall is also equipped with five constant volume fume hoods.

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Building 590 Health & Social Services

Year 2002

Square Feet 64,663

Floors 3

Building Description The Health and Social Services Building was constructed in 2002 and accommodates the College of Health and Social Services, School of Nursing, School of Social Work, Department of Health Science, and a College Canteen. Approximately 200 staff, faculty, and students visit the facility daily during spring and fall semesters with a considerable decrease in building use during the summer months. The facility incorporates Aggie Memorial Tower which was built in 1950 to honor former students who gave their lives in service for their Country. The two-story structure has an envelope consisting of steel reinforced concrete foundation walls, metal stud exterior walls with R-19 fiberglass batt insulation and 2’ thick exterior insulation, and finish system. The floors are slab-on-grade with carpet finishes. The windows are inoperable, aluminum frame, double-pane tinted glass with no thermal breaks. The center roof area is flat, with asphalt sheeting over a built-up roofing system surrounded by a raised perimeter of sloped clay terracotta tile over building felt. The ceilings are primarily standard acoustic, lay-in panels on aluminum t-grid suspension system. The interior walls are gypsum board on metal stud with a painted finish. The windows are inoperable with aluminum frames, double-pane tinted glass, and no thermal breaks. The building entrances have steel door frames and steel doors fitted with fixed glass panels. Interior door are primarily hollow wood doors mounted in steel frames.

HVAC Systems

The HVAC systems serving the Health and Social Services were primarily installed using the 2002 design. A unit for the tower developed space was added in early 2004 and at some time stand-alone systems were added for the south addition. There is a basement mechanical room for the pumps, heat generator, and other equipment , and large penthouse arrangements for the two big VAV air handler units. A

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dedicated air handler for the first floor food services space on the first floor was included and provisions for a future make-up air unit on the roof were made. Fan coil units are used to condition elevator equipment rooms and stairwells. Single-duct VAV terminal units with hot water coil are used extensively to condition the balance of the spaces. The system is DDC to the terminal unit box extent. AHU-3, which conditions the food services area acts as a single-zone constant volume. The tower system is Dx with electric heat. The south addition is conditioned by Mitsubishi “City Multi” employing multiple refrigeration circuits to special ceiling devices that contain the evaporator and supply fan controlled by local thermostat.

The single-duct VAV boxes with hot water heating coils de- centralize the heating portion of the conditioning strategy and have two-way DDC controlled hot water control valves. The sequence has a heating minimum CFM maintained as the hot water control valve modulates closed as the heating load decreases. The hot water control valve is completely shut before the CFM starts ramping up to maximum cooling CFM. This is the optimal method to sequence these terminal units. The discharge or supply temperature setpoint is reset via the Niagara system from 57ºFat 85ºF outdoor air temperature to 70ºF at 40ºF outdoor air temperature. The resetting supply air temperature on a VAV system may need re-examination as it may be adding more fan energy than the thermal energy it saves. Return air humidity or water vapor content sensing capability additions may also be considered. Resetting the supply temperature setpoint based on selected box load may be worth attempting if the reset strategy has some global attraction.

Heating: Hydronic heating is accomplished with typical (existing) low pressure steam shell and tube heat exchanger equipped with a DDC steam valve modulated to control hot water supply temperature to the heating coils serving the air handlers and fan coil units. The design included two hot water pumps on VSD. The hot water supply temperature setpoint is reset on an outdoor air reset schedule of 160ºF when the outside air temperature is 45ºF and at 100ºF when the outdoor air temperature is 80ºF. Space heating is accomplished by the hot water coils in some of the fan coil units and the hot water coils at the single-duct VAV terminal units. The added make-up unit has gas fired heating capability. The split system added for the tower has a 25 kW electric heater. AHU-3 for food services has a hot water heating coil for those first floor spaces. The south addition, served by the Mitsubishi heat pumps provides heating with the reversed cycle refrigerant circuits and may have auxiliary electric heat.

Ventilation: Exhaust - Facility has an exhaust duct riser from EF- 1 on the roof to the restrooms on the three floors beneath it. A

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ceiling exhaust fan serves a small elevator room on the southwest corner of the first floor. The two big VAV air handlers in the penthouse locations have economizer capabilities and thus exhaust and ventilation functions. A series of static pressure sensors in the ceiling spaces and on the roof provide signals to control system with varies the speed of the return fan to maintain slight positive building pressure.

Table B.44 provides a schedule of the available mechanical equipment installed at the Health and Social Services Building.

Table B.44. Building HVAC Schedule

Equipment Qty. Rating Service AHU-1 & 2 2 35,000 CFM Central Station AHU AHU-3 1 4,000 CFM Packaged Rooftop Unit MUA-1 1 3,303 CFM Make-Up Air Unit (Htg only) AHI-1T 1 2,000 CFM Central Station AHU DT FC-1 through 20 20 400 & 2,000 CFM Four (4) pipe Fan Coil Units TU 117 0-2,800 CFM Single-Duct Term. Unit w/ HWC CWC 4 35,000 / 121 CFM / GPM Chilled Water Coil HWC 2 35,000 / 54.6 CFM / GPM Hot Water Coil CWC-3 1 2,000 / 15.3 CFM / GPM Chilled Water Coil HWC-3 1 2,000 / 3.4 CFM / GPM Hot Water Coil ESP-1 & 2 2 7.5 / 300 / 60 HP / GPM / Ft. hd. Chilled Water Pump ESP-3 2 7.5 / 260 HP / GPM End Suction Pump (DHW) VFD-1 & 3 2 40 HP Supply Fans VFD-2 & 4 2 20 HP Return Fans VFD-5 through 8 4 7.5 HP Chilled and Hot Water Pumps HTP 2 7.5 / 300 / 60 HP / GPM / Ft. hd. Heat Transfer Unit HTP (HX) 1 260 / 2700 GPM / MBH Heat Exchanger Heat Pump 1 6 TON Heat Pump Heat Pump 1 4 TON Heat Pump Notes: CHW = chilled water coil CFM = cubic feet per minute (air) Ft. hd. = feet of head GPM = gallons per minute HP = horsepower HW = hot water coil MBH = 1000 BTU TON = 12,000 BTU

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Lighting Systems

The predominant lighting used throughout the Health and Social Services Building includes:

• Classrooms – 2x4 3 lamp T8 prismatic, parabolic and paracube fixtures and 3 lamp T8 indirect/direct fixtures. • Hallways – 2 lamp T8 prismatic fixtures and CFL can fixtures. • Offices – 3 lamp T8 indirect/direct fixtures. • Restrooms – CFL can and T8 cove fixtures. • Exterior – Metal halide recessed fixtures.

Plug Load Equipment

The building has a variety of plug load equipment in operation. The offices have computers with flat screen monitors and printers. The break room has a refrigerator, a microwave oven, coffee makers, a toaster oven, and other kitchen appliances. Detailed plug load survey results are available in the technical appendix.

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Building 643 – NMDA Addition

Year 2012

Square Feet 3,120

Floors 1

Building Description

The New Mexico Department of Agriculture (NMDA) addition was constructed in 2012 and contains numerous offices spaces, a men’s and women’s lavatory, and several closets spaces. The building includes 3,120 sf with only one story above ground. The NMDA addition received its LEED Gold Certification for new construction in July 2012. NMDA Addition’s building occupancy schedule is Monday through Friday from 8am to 12pm and from 1pm to 5pm; closed on Saturdays and Sundays.

The building envelope consists of 6” metal stud framing and 2” rigid insulation with an EIFS exterior composition. The interior walls are comprised of gypsum wall board over metal studs. The roof is white membrane on 6” R-30 insulation. The ceilings of the building are 4’ lay-in acoustic tile and the floors are finished with carpet in the offices and ceramic tile in the restrooms. There are aluminum storefront windows with spandrel glass including a glazing on the exterior surface. The entrance doors are composed of an aluminum frame and aluminum door whereas the interior doors are hollow metal frame with a mixture of metal and wood construction.

The NMDA addition’s existing equipment schedule includes a 3:30am-8pm Monday-Friday and 7am-5pm Saturday-Sunday fan schedule for AHU-1 and VAV zones. Occupied and unoccupied cooling and heating temperatures for VAV zones range from 69˚F to 73˚F.

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HVAC Systems

The HVAC system at the NMDA Addition is comprised of a single rooftop air handler. It consists of a single-duct VAV with terminal hot water reheat coils. There are VFDs on both supply fans. This air handler is equipped with hot and chilled water coils and has a working mixed air economizer. The chilled water valve is two-way whereas the hot water valve is three-way. The AHU is equipped with an airflow station and the VFDs modulate to maintain both CFM and static pressure setpoints. There are nine VAV terminal units throughout the building. There is also a small Modine wall-mounted unit heater in the MEP room and an exhaust relief hood mounted on the roof.

The NMDA Addition is equipped with an Alerton DDC system. This system is used to control the chilled and hot water pumps and the main air handler. The control system provides for typical sequences including equipment scheduling, chilled water static pressure control, equipment start and stop, supply fan static pressure control, economizer, and other sequences. The building’s DDC system is connected to the campus Niagara system over the wide area network.

Chilled water for the NMDA Addition’s cooling system is provided by the main NMDA building located adjacent to the addition. Chilled water is distributed to these systems by chilled water pumps with VFDs. When the Addition was built, two new CHW pumps and motors were installed in the main building’s mechanical room, both have premium efficiency motors.

Hot water for the NMDA Addition heating system is provided by steam from the main utility plant. It is then distributed by a hot water pump and associated VFD located in the adjacent NMDA main building.

Table B.45. Provides a schedule of the available mechanical equipment installed at the NMDA Addition.

Table B.45. Building HVAC Schedule

Equipment Quantity Rating Serves Rooftop AHU 2 3500 / 2.5 / 7.5 CFM / TSP / HP 9 VAV terminal units CHW Pumps 2 230 / 50 / 5 GPM / Ft. hd. / HP Rooftop AHU HW Pump 1 225 / 46 / 5 GPM / Ft. hd. / HP Rooftop AHU Notes: GPM = gallons per minute HP = horsepower Ft. hd. = feet of head TSP = total static pressure in inches CFM = cubic feet per minute

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Lighting Systems

The predominant lighting used throughout the NMDA Addition includes:

• Offices – 2 lamp 28w T5 indirect/direct fixtures. • Exterior – 1 lamp 28w T5 and 12w LED fixtures.

Plug Load Equipment

The building has a variety of plug load equipment operating. Offices typically have a computer with a flat screen monitor and a printer. Other plug loads including copiers and fax machines are in use. Detailed plug load survey results are available in the technical appendix. Detailed plug load survey results are available in the technical appendix.

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Building 644-Satellite Utility Plant

Building Number 644 Year 2013 Square Feet 9,000

Building Description

The Satellite Utility Plant (SUP) houses a chilled water plant facilities staff offices, storage and control rooms. Construction began in mid-2012, and the systems were commissioned in the summer of 2013.

The SUP’s evelope consists of 12” concrere block exterior walls finished in stucco over 2” board insulation, a metal panel roof over 3” board isulation and a truss-supported metal roof deck, and a 6” reinforced conrete slab-on-grade foundation with 12” and 8” concrete block stem walls. The windows include hollow meter double-pane, single-pane aluminum curtain walls, and single-pane insulated translucent panels..

HVAC Systems

The SUP mechancial systems provides chilled water to the campus. The systems include primary cooling and thermal storage equipment and associated chilled water and glycol distribution and control systems. Commissioning of the SUP systems was ongoing during the course of audit. The following systems description will address the expected conditions and operations of the SUP as observed during the audit.

The SUP provides an additional 4,400 tons of combined chiller and ice storage cooling capacity to the existing campus loop. Chiller water cooling is provided by a water-cooled duplex chiller with variable speed centrifugal compressors, and a single compressor glycol chiller. The glycol chiller charges an ice thermal storage bank, and glycol is circulated through a plate and frame heat exchanger (PHX) to provide cooling during thermal storage discharge. A dedicated variable volume in-line pump is equipped with a VFD and circulates glycol through the glycol chiller, ice bank, and cold side of the PHX.

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A three-cell induced draft cooling tower provides heat rejection for both the glycol and duplex chillers. The cooling tower fans are equipped with variable speed fans. The chillers also share constant volume vertical turbine condenser water pumps.

The SUP also includes variable volume, primary-only chilled water circulation pumps. The pumps are equipped with VFD and have head and flow capacity sufficient to provide chilled water for the entire campus.

Space conditioning for the office, control, and storage areas of the SUP is provided by a ceiling-mounted four-pipe FCUs. The electrical room and chiller rooms are each served by dedicated single-zone VAV AHUs with VFD equipped fan motors and full economizer capability. Each AHU has both chilled water and hot water coils.

Chilled water is provided to the FCU and AHU from the chilled water loop. Hot water is provided by a building hot water loop with water heating from a condensing hot water boiler located in the penthouse. Heating hot water is circulated by constant volume vertical in-line pumps. Domestic hot water is provided by a packaged heat exchanger/converter attached to the heating hot water loop.

The SUP systems are controlled by a DDC system including DDC sensors and actuators, TAC Vista controllers, and a Niagara web-based front end. The control system includes complete networked control of status, staging, setpoint, monitoring and trending of chilled water, steam, and co-generation control points.

The following table provides a schedule of the primary mechanical equipment installed at the SUP.

Table B.45. Chiller Plant Equipment

Equipment Quantity Rating Service CH-1 1 2,500 Ton Electric Variable Speed 4,976 GPM Duplex Centrifugal Chiller CH-2 1 877 Ton Electric Centrifugal Glycol 1,875 GPM Chiller CT-1 1 4,700 Ton Induced Draft Cooling 3 x 3,750 GPM Towers HX-1 1 1,900 Ton Chilled Water/Glycol Heat 5,800 GPM Exchanger

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CHWP-1,2,3 3 250 HP Chilled Water Pumps 4,500 GPM 160 Ft. hd. GLYP-1,2 2 100 HP Glycol Pumps 2,900 GPM 100 Ft. hd.. CWP-1,2,3 3 100 HP Condenser Water Pumps 3,750 GPM 86 Ft. hd. Notes: CHW = chilled water coil

Ft. hd. = feet of head pressure

IN. WC = inches of water column

GPM = gallons per minute

HP = horsepower

Table B.46.Heating Hot Water Equipment

Equipment Quantity Rating Service B-1 1 1,050 MBH Condensing Hot Water 0.94 Efficiency Boiler HHWP-1,2 2 3 HP Heating Hot Water Pumps 75 GPM 45 Ft. hd. Notes: MBH= millions of BTU per hour

PSIG = gauge pounds per square inch

GAL = gallons

GPM = gallons per minute

HP = horsepower

Table B. 47.Space Conditioning

Equipment Quantity Rating Service AH-1 1 15 HP Chiller Room 17,905 CFM 1” ESP AH-2 1 15 HP Electrical Room

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17,440 CFM 1” ESP FCU-1,2,3,4,5 1 175 - 545 CFM Offices, Control Room, Storage Notes: ESP = external static pressure

CFM = cubic feet per minute

HP = horsepower

Lighting Systems The SUP interior lighting systems include ceiling-mounted fixtures with T8 and T5 linear fluorescent lamps. Exterior lighting includes wall-mounted fixtures with LED lamps. Interior fixtures are controlled by toggle style wall switches, while the exterior fixtures have photocell and time-clock controls.

Plug Load Equipment

During the audit, SUP had yet to be occupied by facility staff, although the plant equipment was fully operation. It is anticipated that the offices will contain typical office equipment including computers and monitors, copy machines, and coffee makers. The control room will likely have a number of desktop computers with associated monitors.

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C. Base Year Energy Use

C.1 Electric Service

The El Paso Electric Company (EPEC) provides the electric utility service to the Las Cruces campus. To supplement the service, the campus utilizes a natural gas‐fired cogeneration facility to produce a significant portion of the electric consumption and demand. A summary the electric demand, consumption, and utility cost for the base year is presented in Table C.0 below

Table C.0. Electric Energy Demand, Consumption, and Cost Utility Electric Cogeneration Electric Total Campus Electric Month Demand Consumption Demand Cost Total Cost Demand Consumption Demand Consumption (kW) (kWh) ($) ($) (kW) (kWh) (kW) (kWh) Jan 9,316 2,882,343 70,801 177,624 4,696 3,192,279 14,012 6,083,938 Feb 9,140 3,560,586 69,464 210,067 4,640 2,771,002 13,780 6,340,728 Mar 10,584 4,028,474 80,438 235,652 4,416 2,671,752 15,000 6,710,810 Apr 11,442 4,351,650 86,959 242,116 4,400 2,839,000 15,842 7,202,092 May 9,372 4,416,555 71,227 213,219 4,416 2,836,192 13,788 7,262,119 Jun 8,690 4,291,784 68,400 325,213 4,400 2,917,192 13,090 7,217,666 Jul 10,710 4,716,787 81,396 465,222 5,152 3,031,982 15,862 7,759,479 Aug 10,131 5,059,788 76,995 471,975 4,384 2,875,202 14,515 7,945,121 Sep 10,916 5,094,560 82,961 540,900 4,504 3,089,762 15,420 8,195,238 Oct 9,123 4,385,685 69,334 307,825 4,520 3,282,410 13,643 7,677,218 Nov 7,558 3,452,821 68,400 191,119 4,584 3,100,874 12,142 6,561,253 Dec 6,668 2,785,944 68,400 200,642 4,864 3,254,356 11,532 6,046,968 Total/Max 11,442 49,026,976 $894,775 $3,581,574 5,152 35,862,003 15,862 85,002,629

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EPEC provides electricity under Rate 26 State University Rate. As indicated in Table C.0, the annual electric utility costs are approximately $3.6 million. The demand charges associated with the costs are estimated at $900,000. Reference Table C.1 for the costs associated with this rate.

Table C.1. Rate 26 State University Rate (Electric) Energy Charge/ Demand Charge/ kWh On-Peak Billing kW On-Peak Off-Peak Period Jun-Sep $7.60 $0.2412 $0.0486 12:00 PM-6:00 PM (MDT)

The tariff also includes a minimum qualifying expected demand of 9,000 kW and an effective minimum billing demand of 9,000 kW resulting in minimum monthly demand costs.

For example, during the baseline period months of June, November, and December, the facility demand was less than 9,000 kW; however, the monthly demand charge remained fixed at $68,400. This amount is equal to the minimum billing demand of 9,000 kW times the demand charge of $7.60 per billing demand kW.

The Central Utility Plant facility on campus houses the cogeneration plant. The plant includes a natural gas-fired turbine with a nominal capacity of 4.5 MW and an attached heat recovery steam generator (HRSG). The combined equipment can produce up to 45 percent of the Las Cruces campus’ peak electricity demand and provide approximately 22,000 pounds per hour of steam at 100 pounds per square inch. The cogeneration plant provides an estimated 35,000,000 kWh of the campuses annual electric energy consumption of 85,000,000 kWh (reference Table C.0).

C.2 Gas Service

The Las Cruces Utilities provides two natural gas services: industrial (low pressure) and high volume (high pressure). The costs for both services are presented in Table C.2.

Industrial service is distributed from a single utility meter to individual buildings and associated university sub meters. High volume service is dedicated to the Central Utility Plant (CUP) with two meters for the cogeneration turbine and a single additional meter for the steam boilers. As indicated in Table C.2, the annual natural gas utility costs are estimated at $3.3 million. Approximately 90 percent of these costs are associated with central plant utility production of steam and electricity.

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Table C.2. Natural Gas Energy Consumption and Cost Industrial Service High Volume Service (low pressure) (high pressure) Total Cost Cost Cost Month Dth ($) Dth ($) Dth ($) Jan 10,756 52,148 44,276 290,672 180,528 342,820 Feb 8,942 35,388 41,147 244,048 158,631 279,436 Mar 6,048 14,942 32,823 206,238 119,566 221,180 Apr 2,488 8,970 38,695 211,475 93,682 220,445 May 1,438 5,533 37,573 204,984 91,651 210,517 Jun 792 5,548 38,438 207,615 84,254 213,163 Jul 796 5,855 38,921 226,874 85,747 232,729 Aug 863 7,277 38,113 226,310 96,420 233,587 Sep 1,161 10,504 41,666 264,170 104,509 274,674 Oct 1,644 27,488 42,261 283,154 130,566 310,642 Nov 4,573 63,751 38,538 324,000 178,072 387,751 Dec 11,029 63,305 42,743 302,230 203,136 365,535 Total 50,530 300,709 475,194 $2,991,770 1,526,762 $3,292,479

Table C.3 details the charges associated with the natural gas services. The rates include qualifications ranges of 16,000- to 125,000-Dth/year consumption for industrial service and a minimum of 125,000 Dth/year for high volume service

Table C.3. Natural Gas Service Rates

Charge High Volume Service Industrial Service Access/Month $1,043 $859 Service Volume/Dth $0.29 $1.02 Cost of Gas Volume/Dth $5.16

C.3 Baseline Utility Costs

Figure C.0 summarizes the baseline annual utility cost for the Las Cruces campus. The annual utility costs are divided between natural gas and electric energy. $3.6 million (52 percent) is attributed to electric energy and $3.3 million (48 percent) is attributed to natural gas.

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Natural Gas High Volume Service (high pressure) Natural Gas Industrial Service (low pressure) Electric Energy (State University Rate)

$2,991,770, 44% $3,581,574, 52%

$300,709, 4%

Figure C.0. Baseline Period Energy Expenditures (September 2011 – August 2012)

C.4 Baseline Adjustments

There have been a number of recent facility changes and building additions to the Las Cruces campus affecting energy consumption that are not considered in the base year energy usage. The addition of the Satellite Chiller Plant, modifications to the primary and CHW pumping systems, the new turbine driven chiller, the new Center for Performing Arts, and other improvements are expected to result in a large change in campus energy load.

Projects with significant quantifiable effects on the baseline energy consumption are estimated in Table C.4 below. Note that although the effect of the Satellite Chiller Plant addition is significant, it is included as an energy savings measure and, therefore, is not to be included in any baseline adjustment calculation.

Table C.4. Baseline Adjustments Electric Total Electric Demand Energy HP+LP NATURAL GAS Baseline Adjustment Description kW kWh dekatherms Monagle Residence Hall - Vacation -182 -754,408 -1,485 Chamisa Village II - Occupation 2,476 480,529 Not Available Center for the Performing Arts - Occupation 2,243* 940,584* Not Available Additional Well 16 Pumping 4,560* 3,328,800* 0 Absorption Chiller Replacement w/Steam Chiller -913* -675,000* 0 Satellite Chilled Water Plant Addition Included in Energy Savings Calculations Total Baseline Adjustment 8,184 3,320,504 -1,485

*Projected based on partial year’s operations.

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D.0. Energy Conservation Measures

This section outlines the detailed recommendations for the ECMs that comprise this project. We have included a description of the existing conditions, the proposed changes as outlined in the energy savings analysis, provided a detailed scope of work, and documented the impact these measures will have on the facilities.

The construction costs include the engineering design costs, permit costs, construction management fees, warranty, training, commissioning, for the project as a whole, and the individual subcontractor costs for each ECM. These costs are based on the terms and conditions included in the contract.

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Table D.0. Energy Conservation Measure Matrix (Part 1 of 4) Building # 187 244 551 188 010 032 033 035 056 060 172 278 288 386 389

Campus Campus Wide ECM Description Chemistry Building Gerald Thomas Hall Skeen Hall Gardiner Hall Hall Goddard Young Hall Kent Hall William B. Conroy Center Honors Dove Hall Dan W. Williams Hall Hadley Hall Branson Library Guthrie Hall Complex Business Music Building Interior Lighting X X X X X X X X X X X X X X Exterior Lighting X X X X X X X X X X X X X Exterior Pole-Mounted Lighting X DDC Retrofit Fume Hood Controls Retro-Commissioning X X X X X X X X Variable Air Volume Retrofit X X X X X HVAC Upgrade or Replacement Heat Recovery Economizer Upgrade or Repair X X X X X X X X Premium Efficiency Motors CHW Bypass X X X X X X X X X X X Variable Flow Pumping Domestic Hot Water Mechanical Insulation Building Envelope Trash Compaction Computer Power Management Natural Gas Delivery Consolidation CHW System Economizer Peak Saving Generator CUP Condenser Water Optimization

Boiler Blowdown Economizer

Heat Exchanger Leakage

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Table RD.0. Energy Conservation Measure Matrix (Part 2 of 4) Building # 269 059 164 246 363 368 391 541 397 079 080 083 185 260 285 126

Hamiel Hamiel Hamiel - - -

Garrett Garrett Garrett

III II - -

ECM Description Heating Central OFS Plant Cogeneration Facility Neale Hall Research Small Animal Lab Engineering Complex I Knox Hall Science Hall Foreman Harold Ed and Engineering Complex EC Whitlock John Hernandez Hall EC - Rhodes Hall RES - Rhodes Hall RES Milton Hall - Rhodes Hall RES Hall Residence Monagle Corbett Center Center Computer Interior Lighting X X X X X X X X X X Exterior Lighting X X X X X X X X X X Exterior Pole-Mounted Lighting DDC Retrofit Fume Hood Controls Retro-Commissioning X X X X Variable Air Volume Retrofit X X X HVAC Upgrade or Replacement Heat Recovery Economizer Upgrade or Repair X X X X X Premium Efficiency Motors CHW Bypass X X X X X Variable Flow Pumping Domestic Hot Water Mechanical Insulation Building Envelope Trash Compaction Computer Power Management Natural Gas Delivery Consolidation CHW System Economizer Peak Saving Generator CUP Condenser Water Optimization Boiler Blowdown Economizer Heat Exchanger Leakage

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Table D.0. Energy Conservation Measure Matrix (Part 3 of 4) Building # 154 251 287 321 330 341 342 468 034 189 190 263 301 585 184 225 f

Hall

ECM Description Garcia Annex Natatorium O'Donnell Hall JAMES B. Delamater Activity Center o Dept. Mexico New Agriculture DACC, Main Memorial Stadium & Field Room Locker House Coca Cola Weight Training Facility Foster Jett Hall Jett Annex PSL, Clinton P. Hall Anderson Brown & Thomas Hall EXP. USDA JORNADA (Wooton HQ Range Hall) Breland Hall Astronomy Building Interior Lighting X X X X X X X X X Exterior Lighting X X X X X X Exterior Pole-Mounted Lighting DDC Retrofit Fume Hood Controls Retro-Commissioning X X X Variable Air Volume Retrofit X X X HVAC Upgrade or Replacement Heat Recovery Economizer Upgrade or Repair X X X X Premium Efficiency Motors CHW Bypass X X X Variable Flow Pumping Domestic Hot Water Mechanical Insulation Building Envelope Trash Compaction

Computer Power Management

Natural Gas Delivery Consolidation

CHW System Economizer

Peak Saving Generator

CUP Condenser Water Optimization

Boiler Blowdown Economizer

Heat Exchanger Leakage

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Table D.0. Energy Conservation Measure Matrix (Part 4 of 4) Building # 248 261 276 364 365 461 590 275 284 338 604 605 60A 632 643 644

ECM Description Row Regents Health Student Center Walden Hall Clara Belle Williams Hall Building Speech Library Zuhl and Social Health Services Building Garcia Residence Hall Pan American Center Educational Center Services Pinon Hall Chamisa Village Dan W. Williams Hall Annex Nobel & Barnes NMDA Addition Chilled Water Plant Interior Lighting X X X X X X X X X X X X Exterior Lighting X X X X X X Exterior Pole-Mounted Lighting DDC Retrofit Fume Hood Controls Retro-Commissioning X X X X X Variable Air Volume Retrofit X HVAC Upgrade or Replacement Heat Recovery Economizer Upgrade or Repair X X X Premium Efficiency Motors CHW Bypass X X X X Variable Flow Pumping Domestic Hot Water Mechanical Insulation Building Envelope

Trash Compaction

Computer Power Management

Natural Gas Delivery Consolidation

CHW System Economizer

Peak Saving Generator

CUP Condenser Water Optimization

Boiler Blowdown Economizer

Heat Exchanger Leakage

1 Building 364 and 365 have shared mechanical scopes of work.

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ECM 1: Interior Lighting

General Description > ECM Summary For each building identified in the ECM Matrix, Ameresco proposes to replace the existing interior lighting systems with new high efficiency lamps and ballasts and replace obsolete fixtures as needed. Retrofitting and replacing the existing fixtures with more efficient ones will reduce peak demand and electricity consumption. At the same time, it will also reduce cooling requirements caused by less heat emissions from the lamps. Conversely, there will be some increased heating required during the winter although there is interaction with the steam cooling systems associated with the central plant. The cooling and heating interactions have been accounted for in the savings calculations. Ameresco proposes to install automatic lighting controls in specific locations. Installing the occupancy sensors will reduce the operating hours of the lighting systems and consequently save energy.

> Existing Conditions The existing interior lighting systems include a wide mix of older T12 lighting systems and T8 lighting systems, along with incandescent, HID, and compact fluorescent (CFL) technologies throughout the campus along with some newly upgraded LED lamps and fixtures. There are some interior lighting controls; however, the frequency of these devices varies among the buildings. These lighting systems are detailed in the room-by-room survey results provided in the technical appendix.

Recommended Modifications

Ameresco’s approach is to standardize the proposed lighting system whenever practical. Recommended modifications are detailed below.

• Retrofit or replace the existing 34W/40W T12 magnetic ballast fixtures with Premium 28W T8 800 Series lamps and high efficiency multi-volt instant start electronic ballasts. Ballast output will be tailored to each specific location to obtain recommended light levels. • Retrofit or replace the existing 32W T8/electronic ballast fixtures with Premium 28W T8 800 Series lamps and high efficiency multi-volt instant start electronic ballasts. Ballast output will be tailored to each specific location to obtain recommended light levels. • De-lamp specific interior linear T12 or T8 fixtures and retrofit with Premium 28W T8 800 Series lamps, high efficiency multi-volt instant start electronic ballasts and Troffer/strip/industrial reflector kits, as applicable. Ballast output will be tailored to each specific location to obtain recommended light levels. • Retrofit or replace all fixtures with 8’ lamps (Slim-line, HO, and VHO) utilizing 4’ Premium 28W T8 800 Series lamps, high efficiency multi-volt instant start electronic ballasts, and

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conversion strip or industrial kits. All egg crate type fixtures will be replaced with new wrap fixtures. Ballast output will be tailored to each specific location to obtain recommended light levels. • Retrofit/convert U-lamp fixtures utilizing 2’ Premium15W T8 800 Series lamps, high efficiency multi-volt instant start electronic ballast, and Troffer reflector kits. Ballast output will be tailored to each specific location to obtain recommended light levels. • Re-Lamp existing biax fixtures with energy saving biax lamps or retrofit to fixtures utilizing 2’Premium 15W T8 800 Series lamps, high efficiency multi-volt instant start electronic ballasts, and Troffer reflector kits (there are some applications where the existing biax fixtures will not accept a 2’lamp, and therefore, a new fixture or a re-lamp only will be the appropriate upgrade). Zuhl Library and NMSU Barnes & Noble Bookstore have new Volumetric Fixtures proposed for the existing biax fixtures. These new Volumetric Fixtures will utilize 28W T8 800 Series lamps and high efficiency multi-volt instant start electronic ballasts. Ballast output will be tailored to each specific location to obtain recommended light levels. • Retrofit incandescent lamps with screw in LED lamps or CFL lamps (dimming fixtures will be retrofitted with screw in or plug-in LED lamps). Residence Halls will be retrofit with CFL lamps; all other areas will be LED. • Re-lamp existing compact fluorescent fixtures with 4-pin plug-in lamps with energy saving 4- pin plug-in lamps. • Replace interior HID (mercury vapor, metal halide or high pressure sodium) fixtures with either new LED fixtures or linear fluorescent fixtures utilizing Premium 28W T8 800 Series lamps or Premium Energy Saving T5HO lamps-depending on application, resulting in longer life products and instant on lighting. • Retrofit interior HID (metal halide) fixtures with pulse start metal halide lamp and ballast kits (particularly relating to sports lighting and sporting areas - Pan Am Center Seating and Natatorium). • Install LED technology in certain applications – all Incandescent and CFL exit signs and all recessed cans. • Existing screw in CFL lamps and CFL 2 pin plug-in lamps are EXCLUDED from the scope of work. Ameresco’s survey has documented areas with existing lighting occupancy controls; however, we have found that there is an opportunity to install more lighting occupancy controls in areas that currently do not have them. Lighting occupancy controls will be used to turn off unnecessary lighting fixtures when the space is vacant. Data Loggers were placed in areas of the facilities to understand the hours of operation and the potential of lighting waste (lights operating, but no one is in the room). Most common room types for lighting occupancy controls are listed restrooms and hallways on the room-by-

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room scope. Ceiling and wall mount sensors will be proposed based on application. Vending machine controls are also included in our proposed upgrades. Vending machine controls eliminate the unnecessary illumination of vending machine signage during unoccupied times for beverage and snack machines using infrared sensing technology. When used on chilled beverage dispensers, the controls are configured to save energy without compromising product quality and will cycle the units on occasionally to maintain beverage temperature. The controller is external to the machine and does not require vendor maintenance.

The proposed interior lighting controls are identified below:

• Install wired lighting occupancy controls in listed areas of the facilities. (See lighting audit, room-by-room, for detail.)

• Install vending machine controls on snack and soda vending machines.

Detailed Project Scope

The scope of work includes installation or retrofit of approximately 40,350 fixtures in buildings shown on the ECM Matrix. This measure will include the installation of the lamps, ballasts, reflectors, and fixtures needed for a complete project. A complete room-by-room list of the entire lighting project is provided in the appendices.

The lighting control project includes the installation of approximately 930 controls at various locations throughout the buildings. The controller installation will include the installation of the control, wiring, and sensors needed for a complete installation. A complete list of occupancy sensor type and locations is provided in the appendices.

The project scope of work includes:

• Surveying the existing lighting fixtures for pre-existing damage to the fixture housing or wiring • Reporting any damage to NMSU for correction • Replacing any damaged or broken lamp sockets that are still being used. In the event of de-lamping any fixtures, all of the unused lamp sockets will be removed from the fixtures • Cleaning all inside surfaces of the light fixtures • Painting surfaces or repairing/replacing ceiling tile due to removal of old fixtures • Cleaning up work area and disposing of any construction debris in Ameresco-supplied waste bins and removal from site • Complying with applicable local, state, and federal codes. • Exclusions to the scope of work include:

• Sampling, testing, or removing asbestos or lead

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• Repairing existing damaged or faulty electrical equipment and wiring • Upgrading electrical distribution system to meet current electrical codes • Replacing any lenses • Stamping and signing engineering plans and specifications. The work will be performed using the room-by-room audit in the appendix. Ameresco has included lamp and ballast recycling and disposal in the project scope of work. Recycling certificates will be provided to NMSU for all recycled material. PCB ballasts will be disposed of using the appropriate containers and hazardous material handling procedures.

Energy Savings Proposed

Ameresco performed detailed lighting calculations to determine the energy savings associated with the project. The energy savings will result from the operation of more efficient fixtures. Direct electricity savings are associated with the reduced lamp wattages. Indirect savings are associated with a reduced cooling load. Table D.1 summarizes the energy savings associated with this project.

Table. D.1.. Energy Savings Associated with ECM 1

Annual Savings Units 5,585,513 kWh 1,485.6 kW 658 DTh, Natural Gas $476,931 Utility Cost Savings > Energy Detailed calculations for energy and cost savings for ECM-1 are provided in the appendices. Energy savings for the retrofits are determined by comparing the baseline existing kW and kWh with the proposed kW and kWh. Total cost savings from lighting retrofit is then calculated from the energy savings and the baseline energy cost for the buildings.

kW savings = existing kW – proposed kW

kWh savings = existing kWh – proposed kWh

kW $ savings = kW savings x demand cost

kWh $ savings = kWh savings x energy cost

Existing energy usage for lighting is calculated from the number of existing light fixtures at the buildings and their rated wattages. Existing operating hours of the fixtures are extrapolated from run hour logger data obtained during the TEA. The data was obtained by installing a light logger at representative fixtures throughout the buildings. The technical appendix shows a summary list of lighting run hours by

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room type that are used in the calculations. Complete results from the logger data are provided in technical appendix.

Energy savings for the occupancy sensors are determined by reducing the run hours of the proposed lamps and ballasts. Total cost savings are then calculated from the energy savings and the baseline energy cost for the buildings.

kWh savings = proposed kW x (existing hours – proposed hours)

kWh $ savings = kWh savings x energy cost

> Maintenance Maintenance savings are based on material costs only. Ameresco is proposing using extended life lamps, which will increase the time between burnouts. De-lamping overlit areas and installing of reflectors will reduce the total number of lamps and ballasts installed on campus which will reduce maintenance cost. The interior environment will be enhanced through the upgrade of the lighting systems by providing a lighting system that reliably illuminates the common areas, thereby, providing a more inviting atmosphere. The maintenance savings for ECM 1 is $59,075 per year.

Replacing the old equipment will reduce internal labor associated with maintaining and operating the lighting equipment. These savings are not included in the calculation.

> Interactions This ECM will reduce the cooling load at the campus by lowering the heat gains in the conditioned spaces from the light fixtures. It will also increase the heating load during the heating season due to the loss of heat gain, which resulted in a net savings in natural gas due to interactions with the use of steam to provide chilled water from the central plant. Ameresco used the eQUEST modeling program to determine the heating penalty and cooling savings by using the watts per square-foot of the existing and proposed systems. (Refer to the model output data in the appendices for further information.)

References

Utility data

Field notes, survey data, logger data

Lighting manufacturer catalogs

Kaufman, John E., PE, FIES, and Christensen, Jack F. IES Ready Reference. Illuminating Engineering Society of North America, 1989

U.S. Department of Energy (DOE). Advanced Lighting Guidelines. Report Number: DOE/EE-0008, 1993

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Illuminating Engineering Society of North America (IES). IES Lighting Handbook. New York, New York, 1999

Assumptions

Assumptions made in the development of this proposal include:

The savings for the energy conservation measure are based on several run-hour schedules.

All work surfaces are free of asbestos and other hazardous materials. NMSU is responsible for any hazardous material abatement.

The cost of the project does not include any repair or upgrades of existing electrical distribution systems that are not up to current codes.

Utility Interruptions

Electricity interruption will be isolated to the area of work and its duration, minimized through carefully planned installation phasing. Installation schedules will be coordinated with site personnel to minimize the impact on building occupants.

Other > Equipment Service Life The equipment service life for the major components includes:

Lighting fixtures – 20 years Electronic fluorescent ballasts – 100,000 run hours Fluorescent lamps – 2- and 4-foot lamps have a service life of 30,000 hours HID lamps – 30,000 run hours Electronic HID ballast – 100,000 run hours LEDs – 50,000 to 100,000 run hours Lighting controls – 15 Years > Warranty Ameresco provides a 1-year warranty for materials and labor for the retrofit. The manufacturer provides a 60-month limited warranty on the electronic ballasts, and a 30-month limited warranty on the fluorescent lamps.

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> Interface with Existing Equipment The retrofit of the existing fixtures will have a minimal impact on the aesthetics of the facility. Retrofitting the lighting will reduce the electrical consumption at the facility, lower the cooling load, and raise the heating load.

ECM 2: Exterior Lighting

General Description > ECM Summary The intent of this retrofit is to replace the existing building exterior lighting as shown in the recommended modifications below. The exterior lighting scope includes wall packs, floods, cylinders, and surface mount box fixtures for buildings, as identified in the ECM Matrix. Where feasible, LED technology will be proposed. By going from HID, CFL, or incandescent technology to LED, the rated life of the lamps will increase from 20,000 (HID), 10,000 (CFL) or 1,000 (Incandescent) run hours to 25,000, 50,000 or 100,000 hours for the LED depending on manufacturer and fixture type. This will alleviate many maintenance concerns as well as provide the latest, most efficient technology. NMSU has already begun the switch to LED fixtures by replacing some of the wall pack type fixtures throughout campus. The following factors will be taken into consideration for the exterior building lighting:

Dark sky compliant Age and condition of existing fixtures Existing lighting technology type Photocell or timer controlled Color of existing fixtures > Existing Conditions Exterior building lighting consists of various types of lighting technologies and fixtures throughout the campus. Lighting technologies include HID sources (metal halide and high pressure sodium), CFL, incandescent, and linear fluorescent. Fixture types found are recessed cans, surface mount box style, wall-packs, floods, and post top.

Recommended Modifications

Ameresco proposes replacing the existing exterior lighting with the following:

• Replace all exterior HID (mercury vapor, metal halide or high pressure sodium) fixtures with new LED fixtures. Fixture types are wall packs, floods, cylinders and surface mount box

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fixtures. This upgrade will result in significant energy savings along with longer life products with instant on lighting. • Retrofit all incandescent lamps with screw in LED lamps or CFL lamps (dimming fixtures will be retrofitted with screw in or plug-in LED lamps). Retrofit or replace all 34W/40W T12 magnetic ballast fixtures with Premium 28W T8 800Series lamps and high efficiency multi- volt instant start electronic ballasts. Ballast output will be tailored to each specific location to obtain recommended light levels. • Retrofit or replace all 32W T8/electronic ballast fixtures with Premium 28W T8 800 Series lamps and high efficiency multi-volt instant start electronic ballasts. Ballast output will be tailored to each specific location to obtain recommended light levels. • Re-lamp all compact fluorescent fixtures with 4-pin plug-in lamps with energy saving 4-pin plug-in lamps. Existing screw in CFL lamps and CFL 2 pin plug-in lamps are EXCLUDED from the scope of work

Detailed Project Scope

This measure will include the installation of the fixtures, lamps, ballasts, wiring, and kits needed for a complete project. A complete list of the exterior lighting project fixtures is provided in the technical appendices.

The project scope of work includes:

• Surveying the existing lighting fixtures for pre-existing damage to the fixture housing or wiring.

• Reporting any damage to NMSU for correction.

• Replacing or retrofit the light fixtures with the appropriate kits or fixtures.

• Cleaning all inside surfaces of the light fixtures.

• Cleaning up work area and disposing of any construction debris in Ameresco-supplied waste bins and remove from site.

• Complying with applicable local, state, and/or federal codes.

Exclusions to the scope of work include:

• Sampling, testing, or removing asbestos or lead • Repairing existing damaged or faulty electrical equipment and wiring • Upgrading electrical distribution system required to meet current electrical codes • Replacing any lenses

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• Replacing broken or damaged light poles or supports • Stamping and signing engineering plans and specifications Ameresco has included lamp and ballast recycling and disposal in the project scope of work. Recycling certificates will be provided to NMSU for all recycled material. PCB ballasts will be disposed of using the appropriate containers and hazardous material handling procedures.

Energy Savings Proposed

Ameresco performed detailed lighting calculations to determine the energy savings associated with the project. The energy savings will result from the operation of more efficient fixtures. Direct electric savings are associated with the reduced lamp wattages. Table D.2 summarizes the energy savings associated with this project.

Table. D.2. Energy Savings Associated with ECM 2

Annual Savings Units 203,244 kWh 4.7 kW $10,143 Utility Cost Savings > Energy Detailed calculations for energy and cost savings for ECM-2 are provided in the appendices. Energy savings for the retrofits are determined by comparing the baseline existing kW and kWh with the proposed kW and kWh. Total cost savings from lighting retrofit is then calculated from the energy savings and the baseline energy cost.

kW savings = existing kW – proposed kW

kWh savings = existing kWh – proposed kWh

kW $ savings = kW savings x demand cost

kWh $ savings = kWh savings x energy cost

Existing energy usage for lighting is calculated from the number of existing light fixtures and their rated wattages. Existing operating hours of the fixtures are based on exterior photocell operation, which is equal to 4,368 hours per year.

Existing kW = existing quantity x existing wattage

Existing kWh = existing operating hours x existing kW

Proposed energy usage after retrofit is calculated based on the proposed number of fixtures and rated wattage. The post-retrofit run hours used in the calculation are the same as the existing run hours.

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Proposed kW = proposed quantity x proposed wattage

Proposed kWh = proposed operating hours x proposed kW

> Maintenance Maintenance savings are based on material costs only. Ameresco is proposing using long life LED lamps, which will increase the time between burnouts. The maintenance savings for ECM-2 are $4,123 per year. Replacing the old equipment will reduce internal labor associated with maintaining and operating the equipment. These savings are not included in the calculation.

> Interactions There are no savings interactions for this measure since the light fixtures are in unconditioned exterior spaces.

References

Utility data

Field notes, survey data, logger data

Lighting manufacturer catalogs

Kaufman, John E., PE, FIES, and Christensen, Jack F. IES Ready Reference. Illuminating Engineering Society of North America, 1989

DOE. Advanced Lighting Guidelines. Report Number: DOE/EE-0008, 1993

IES. IES Lighting Handbook. New York, New York, 1999

Assumptions

Assumptions made in the development of this proposal include:

The savings for the measure are based on run hours shown in the room-by-room table in the technical appendix.

All work surfaces are free of asbestos and other hazardous materials. NMSU is responsible for any hazardous material abatement.

The cost of the project does not include any repair or upgrades of existing electrical distribution systems that are not up to current codes.

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Utility Interruptions

Electricity interruption will be isolated to the area of work and its duration minimized through carefully planned installation phasing. Installation schedules will be coordinated with site personnel to minimize the impact on students, faculty, and staff.

Other > Equipment Service Life The equipment service life for the major components includes:

Lighting fixtures – 20 years LEDs – 50,000 to 100,000 run hours > Warranty Ameresco provides a 1-year warranty for materials and labor for the retrofit.

> Interface with Existing Equipment The retrofit of the existing fixtures will improve the aesthetics of the campus. The new LED fixtures will look similar those already installed by the facility staff and the retrofit kits will re-use the existing fixture housing. Retrofitting the exterior site lighting will also reduce the electrical demand and consumption at the campus.

ECM 3: Exterior Pole Mounted Lighting

General Description > ECM Summary The intent of this retrofit is to replace selected exterior pole lighting on campus. These include parking lots, roadway and street lighting. New LED fixtures for all exterior pole lighting will be provided. In addition to replacing the fixtures, the existing thin-walled poles identified in the technical appendix would be replaced with new pre-stressed, spun-cast concrete lighting poles.

> Existing Conditions NMSU has already begun the switch to LED fixtures on poles, as several parking lot areas have been identified as existing LED fixtures. In addition to replacing fixtures, NMSU has indicated that many existing poles around campus need to be replaced; these are referred to as thin-walled poles. These thin-walled poles were identified in the audit. There are approximately 25 existing thin-walled poles located in parking lots and 246 existing thin-walled poles located on streets and other locations.

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Recommended Modifications

Ameresco proposes replacing the existing exterior pole mounted lighting with the following:

• Replace specific exterior HID (metal halide and high pressure sodium) fixtures with new LED fixtures of like type. Fixture types are Cobra Heads, Shoeboxes, Post Tops and Floods. This upgrade will result in significant energy savings along with longer life products with instant on lighting.

• Replace specified thin-walled poles with new 30’ Ameron decorative poles and supporting sweep arms. Poles located in parking lots will be installed with a concrete base and non-parking areas to be direct burial. This upgrade includes new LED fixtures. Concrete base installation will include excavation, concrete form, reinforcement, backfill and compaction. Direct burial installation will include excavation, backfill and compaction. A direct burial junction box at each pole base is included to allow for existing branch circuits to be spliced and tapped.

Detailed Project Scope

Ameresco is proposing to begin the new pole installation at the northwest corner of the Las Cruces main campus and working eastbound, but staying north of Stewart St. (See the maps provided in the technical appendix for locations of poles which are lettered and numbered in RED).

Included are the following:

(28) Roadway poles (52) Site lighting poles (10) Parking lot poles

This measure will include the installation of the fixtures, lamps, ballasts, wiring, and kits needed for a complete project. A complete list of the exterior pole mounted lighting project fixtures is provided in the technical appendices.

The project scope of work includes:

• Replacing specified thin-walled poles with new 30’ Ameron decorative poles and supporting sweep arms. Replacing the existing poles and light fixtures as specified.

• Poles located in parking lots will be installed with a concrete base and non-parking areas to be direct burial.

• Concrete base installation will include excavation, concrete form, reinforcement, backfill, and compaction.

• Direct burial installation will include excavation, backfill, and compaction.

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• Cleaning up work area and disposing of any construction debris in Ameresco-supplied waste bins and remove from site.

• Complying with applicable local, state, and/or federal codes.

Exclusions to the scope of work include:

• Sampling, testing, or removing asbestos or lead

• Repairing existing damaged or faulty electrical equipment and wiring

• Upgrading electrical distribution system required to meet current electrical codes

• Stamping and signing engineering plans and specifications

Ameresco has included lamp and ballast recycling and disposal in the project scope of work. Recycling certificates will be provided to NMSU for all recycled material. PCB ballasts will be disposed of using the appropriate containers and hazardous material handling procedures.

Energy Savings Proposed

Ameresco performed detailed lighting calculations to determine the energy savings associated with the project. The energy savings will result from the operation of more efficient fixtures. Direct electric savings are associated with the reduced lamp wattages. Table D.3 summarizes the energy savings associated with this project.

Table. D.3. Energy Savings Associated with ECM 3

Annual Savings Units 96,706 kWh 2.2 kW $4,795 Utility Cost Savings > Energy Detailed calculations for energy and cost savings for ECM-2 are provided in the appendices. Energy savings for the retrofits are determined by comparing the baseline existing kW and kWh with the proposed kW and kWh. Total cost savings from lighting retrofit is then calculated from the energy savings and the baseline energy cost.

kW Savings = existing kW – proposed kW

kWh Savings = existing kWh – proposed kWh

kW $ Savings = kW savings x Demand Cost

kWh $ Savings = kWh savings x Energy Cost

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Existing kW = existing quantity x existing wattage

Existing kWh = existing operating hours x existing kW

Proposed kW = proposed quantity x proposed wattage

Proposed kWh = proposed operating hours x proposed kW

> Maintenance Maintenance savings are based on material costs only. Ameresco is proposing using long life LED lamps, which will increase the time between burnouts. The maintenance savings for ECM-3 are $888 per year. Replacing the old equipment will reduce internal labor associated with maintaining and operating the equipment. These savings are not included in the calculation.

> Interactions There are no savings interactions for this measure since the light fixtures are in unconditioned exterior spaces.

References

Utility data

Field notes, survey data, logger data

Lighting manufacturer catalogs

IES. IES Lighting Handbook. New York, New York, 1999

Assumptions

Assumptions made in the development of this proposal include:

The savings for the measure are based on run hours shown in the room-by-room table in the technical appendix.

All work surfaces are free of hazardous materials. NMSU is responsible for any hazardous material abatement.

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The cost of the project does not include any repair or upgrades of existing electrical distribution systems that are not up to current codes.

Utility Interruptions

Other > Equipment Service Life The equipment service life for the major components includes:

Lighting fixtures – 20 years LEDs –100,000 run hours > Warranty Ameresco provides a 1-year warranty for materials and labor for the retrofit.

> Interface with Existing Equipment The retrofit of the existing poles and pole mounted fixtures will improve the aesthetics of the campus. The new LED fixtures will look similar those already installed by the facility staff. Retrofitting the exterior pole mounted lighting will also reduce the electrical demand and consumption at the campus.

ECM 6: Retro-Commissioning

General Description > ECM Summary Retro-commissioning (RCx) is a systematic process to identify the effectiveness of the facilities Direct Digital Control (DDC) system. It is primarily focused on building HVAC systems and Central Utility Plant mechanical systems with an emphasis on identifying operational or energy related issues. It provides a way to inspect, test, and verify that each system is working as per its design intent to deliver proper operation and energy efficiency.

> Existing Conditions NMSU has a well-developed campus wide DDC system. Individual buildings have a variety of controls ranging from stand-alone and pneumatic controls to fully operable DDC systems extending to the zone level. Building level controls are primarily TAC Xenta controls communicating to the campus Niagara

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front end over the network via each building’s JACE controllers. Generally, the DDC system is very well maintained; however, Ameresco noted opportunities to improve the overall system performance through the retro-commissioning process. While the controllers themselves may be in good working condition, the field devices and mechanical components they control may be in need of adjustment, repair, or replacement. Specific examples would include leaking control valves, worn dampers or other issues that could prevent systems from meeting their peak operational effectiveness. Often these issues are simply related to the normal wear and tear associated with typical operation. In some cases for example, the sequences of operation may also be optimized through pressure or temperature reset strategies.

Recommended Modifications

For each building identified in the ECM Matrix, the following inspections and tests would be performed. This work applies to the mechanical systems not affected by other mechanical ECMs. For example, the VAV retrofit, economizers or chilled water pump bypass measures would be commissioned within the scope of their respective measures.

Equipment Inspections – On a per building and per system basis, detailed inspections of all control devices would be performed, which would document the physical condition of all control elements in terms of their condition and service suitability. The completed Equipment Inspection Forms would be provided by Ameresco’s RCx agent to NMSU’s representative for review. Any control elements needing repair will be listed on the Issues Log by the agent for subsequent repair authorization to the controls subcontractor.

Point-to-Point Verifications – The Ameresco commissioning agent would provide the controls subcontractor with Point-to-Point Verification Forms and procedures. The controls subcontractor would physically conduct the Point-to-Point Verifications with coordination with the agent and NMSU’s representative. The Point-to-Point Verifications validate each control point’s existence, condition, settings, and operational status. During the Point-to-Point Verification the controls subcontractor would physically verify each control element’s zero and span, state change, calibration, etc. Any control elements failing the verification test would be listed on the Issues Log by the agent for subsequent repair authorization to the controls subcontractor.

Functional Performance Tests – Upon resolution of the issues identified in the Equipment Inspections and Point-to-Point Verifications, the controls subcontractor with direction from the commissioning agent and NMSU’s Energy Manager, would perform Functional Performance Tests (FPTs). The test plan and procedure will be developed by the agent and is designed to systematically test and verify the sequence of operations for each system type identified in the Air and Water Systems to be Tested section of the Detailed Project Scope. Any sequences failing the FPTs would be listed on the Issues Log by the agent for subsequent sequence corrections and programming. Follow-up testing shall be done on any systems requiring sequence modifications.

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Inspections and tests may be witnessed by the RCx agent and NMSU’s representative.

Detailed Project Scope

The following is a list of potential HVAC systems that shall be included within the scope of work. The type and quantities of systems shall be identified by the Ameresco Commissioning Agent.

Air Side Systems:

• Constant volume – dual-duct air handler: Typical units are equipped with supply fan(s), return or relief fan(s), cooling coil(s), heating coil(s), and mixed air economizer. The units may or may not be equipped with VFDs. Units may have a combination of pneumatic and/or DDC elements.

• Constant volume – dual-duct terminal box: Typical units are equipped with a cooling damper, heating damper, heating, cooling and or total airflow, discharge air temperature, and one or two pneumatic or DDC actuator(s).

• Variable volume – dual-duct air handler: Typical units are equipped with supply fan(s), return or relief fan(s), cooling coil(s), heating coil(s), and mixed air economizer. The units are equipped with VFDs and static pressure control and building static pressure control. Units may have a combination of pneumatic and/or DDC elements.

• Variable volume – dual-duct terminal box: Typical units are equipped with a cooling damper, heating damper, heating, cooling and or total airflow, discharge air temperature, and two pneumatic or DDC actuators.

• Constant volume – single-duct air handler: Typical units are equipped with supply fan(s), return or relief fan(s), cooling coil(s), heating coil(s), and mixed air economizer. The units may or may not be equipped with VFDs. Units may have a combination of pneumatic and/or DDC elements.

• Variable volume – single-duct air handler: Typical units are equipped with supply fan(s), return or relief fan(s), cooling coil(s), heating coil(s), and mixed air economizer. The units are equipped with VFDs, duct static pressure control and building static pressure control. Units may have a combination of pneumatic and/or DDC elements.

• Variable volume – single terminal box (no reheat): Typical units are equipped with a volume damper and airflow and pneumatic or DDC actuators.

• Variable volume – single terminal box (with reheat): Typical units are equipped with a volume damper, airflow, reheat valve, discharge air temperature, and pneumatic or DDC actuator.

• Constant volume multi-zone unit – Units consist of hot deck, cold deck, neutral deck, supply fan(s), return fan(s), and mixed air economizer with up to 12 zones per unit. Units may have a combination pneumatic and DDC elements.

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• Packaged single-zone unit – Units consist of a package single-zone system with one or more DX cooling stages, in gas, electric, or heat pump configurations with or without economizer.

• Split system – A single-zone DX system with split condenser and cooling or heating coil. This may include heat pumps.

• Fan coil unit (2-pipe) – Units consist of one coil and multispeed fan motor for cooling or heating mode, and may or may not have control valve(s).

• Fan coil unit (4-pipe) – Units consist of one cooling coil, one heating coil, and a multi-speed fan motor with cooling or heating mode, and may or may not have control valve(s).

• Water source heat pump – A single-zone packaged heat pump with compressor, fan, reversing valve, and isolation valve.

Water Side Systems:

• Constant volume tertiary chilled water pump(s) - One or two chilled water pumps in a lead/standby configuration. Pumps may or may not have VFDs.

• Variable volume tertiary chilled water pump(s) - One or two chilled water pumps in a lead/standby configuration. Pumps have VFDs and static pressure sensors. Pumps may or may not have dedicated VFD, early installations included one VFD switched to lead pump.

• Hot water converter – Building heating steam-to-hot water converter. May be equipped with 1/3 and 2/3 steam control valves. Control valves may be stand-alone, pneumatic or DDC controlled.

• Constant volume hot water pump(s) - One or two heating water pumps in a lead/standby configuration. Pumps may or may not have VFDs. Pumps may or may not have dedicated VFD, some installations include one VFD switched to lead pump.

• Heat recovery loop – Hydronic coils and pumped between exhaust and outside air ducts.

• Heat recovery unit- 100% outdoor air with exhaust air going thru one half of heat wheel.

Due to the nature of retro-commissioning, the number and type of issues and their repair costs cannot be fully determined until after the inspections and tests are performed and the results obtained. Therefore, the material costs associated with this measure are budgetary not-to-exceed costs and provide a fund from which to perform the needed repairs. It is Ameresco’s intent to work with NMSU to prioritize and rank items on the Issues Log so that issues with the highest priority are corrected within the material cost budget. Issues related to component replacements are generally awarded to the controls subcontractor for correction. However, in some cases the repairs may be referred to NMSU’s facilities services for correction or repair.

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Exclusions to the scope of work include:

• Sampling, testing, or removing asbestos or lead

• RCx of fume hoods

• Repair costs that exceed the material cost budget

• Code related upgrades

• Repairs unrelated to HVAC mechanical, electrical, or control systems

• Stamping and signing engineering plans and specifications

• Testing, Adjusting and Balancing (TAB) of air or water systems

Energy Savings Proposed

Ameresco developed detailed eQUEST models to determine the energy savings associated with the project. The energy savings will result from the improved operation and efficiency of the HVAC systems. Table D.4 summarizes the energy savings associated with this project.

Table. D.4. Energy Savings Associated with ECM 6

Annual Savings Units 1,025,302 kWh 125.6 kW 11,453 DTh, Natural Gas $141,230 Utility Cost Savings > Energy Ameresco calculated the energy savings for this measure using calibrated building simulation models. Ameresco developed calibrated baseline energy simulation models for a statistically relevant number of campus buildings to represent the population of measures to be installed. The inputs for the individual building models were developed to match the existing building conditions, including as-built construction specifications and the operation of the buildings concurrent with the time period associated with the utility baseline (September 2011 – August 2012). These inputs include project and site conditions, building shells with architectural details and constructions, internal loads such as lighting density and schedules, water-side loads and schedules, and air-side loads and schedules. The baseline models’ energy consumption was calibrated using NMSU provided building sub-meter data for electricity, natural gas, chilled water, and steam utilities. Calibrations were made to the utility data according to IPMVP guidelines.

Parametric analysis was then performed on each individual building model for each measure in a manner that captured the interactive effects of each of the proposed ECMs. Results from the modeled

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building measures were then extrapolated to the remaining population of building measures. The combined modeled and extrapolated results were then applied to a calibrated whole campus model, including the Central Utility Plant. Parametric analysis of this calibrated whole campus model captured the interactive effects of proposed ECMs on central plant chilled water production, steam production, and electric and natural gas utility consumption. The resulting central plant energy consumption savings as indicated by the whole campus model were then credited to the individual building measures on a pro-rated basis to capture the plant level impacts of the measures on a per building basis.

The executable eQUEST models and results are available in the technical appendix.

> Maintenance No maintenance savings are claimed for this measure. Typically, maintenance costs are reduced as the retro-commissioning work reduces current and future work orders to repair failed components. > Interactions This ECM would reduce the cooling and heating loads at the facility by ensuring that HVAC systems are operating to meet their design intent and through optimized sequences of operation. Refer to the model output data in the appendices for further information.

References

Field notes, survey data, logger data

Niagara system graphics and trend logs

Assumptions

The NMSU Niagara system, together with field observations, were used to identify RCx opportunities in modeled buildings. It is assumed that the sample of modeled building is representative of the population of buildings for the proposed measure.

Utility Interruptions

Electricity interruption will be isolated to the area of work and its duration minimized through carefully planned testing and installation phasing. Testing and repair schedules will be coordinated with site personnel to minimize the impact on building occupants.

Other > Equipment Service Life The equipment service life for the major components includes:

DDC field devices – 15 years

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> Warranty Ameresco provides a 1-year warranty for materials and labor for the retrofit. > Interface with Existing Equipment

The interface to existing equipment is considered to be negligible, as each DDC component identified for repair would replace an existing component. Therefore, the impact to existing equipment would be considered a like-kind replacement.

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ECM 7: VAV Retrofit

General Description > ECM Summary For each of the buildings identified in the ECM Matrix, Ameresco proposes to convert specific air handling systems from constant volume to variable air volume (VAV) systems. This measure would retrofit the existing mixing boxes and the air handling systems supplying these facilities. The optimization of the air distribution systems and the control strategy will result in lower thermal and fan electric energy consumption/power demand. Minimization of mixing cold and warm airstreams and supplying only the needed quantity of air (CFM) to the spaces served achieves occupant comfort during off-peak load periods of time. Coincident modifications will be necessary at the main air systems (air handling units/AHUs) to throttle the air supply as the modified boxes respond to load changes. Strategically developed mixing box internal retrofit “kits” will be utilized to avoid taking the existing boxes down out of the ceiling and/or the necessity to modify ductwork. > Existing Conditions Several different cases exist for the current VAV systems and associated sequences of operation. These systems were designed to have heating and cooling available to all zones/boxes at all times. For example, for dual-duct systems, the box sequence would mix varying quantities of hot air with inversely varied quantities of cold air to achieve the space temperature setpoint. The air handling units serving these (existing) boxes, or terminal units, typically had fixed setpoints for the heating and cooling coils. Hot duct temperature setpoints were sometimes reset with outdoor air temperature for better controllability during mild low heating load) weather. Cold duct temperature setpoints were typically set at a fixed setpoint of 55oF. In most cases, the main supply fan was used for both the cooling duct and the heating duct, but in limited cases, the heating supply fan and the cooling supply fan are separate fans. In the case of single-duct boxes at Young Hall, the main air handler has both a cooling coil and a heating coil in series to provide supply air for the boxes.

The existing box type/configuration is as follows:

• Young Hall has single-duct boxes with a Mitco actuator on the supply air to the box. A heating coil with a three-way hot water control valve has been installed on the leaving side of the box. The pneumatic room thermostats modulate the supply air actuator in sequence with the hot water control valve to control the space temperature setpoint. Main air handler has hot water coil also for colder weather.

• The Astronomy Building and Milton Hall have true double-duct boxes with separate pneumatic actuators on the hot duct and the cold ducts serving the box. Room pneumatic thermostats modulate the cooling damper actuator and heating damper actuator, mixing the two airstreams and maintaining the space temperature setpoint.

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• Branson Hall, Guthrie Hall, and Breland Hall all have true double-duct boxes with a single pneumatic actuator. A space/room thermostat modulates the cold and hot duct airstreams via the one pneumatic actuator. The cold duct damper and hot duct damper (internal to the box) are mechanically/physically linked in an inverse arrangement. The box can go from 100percent cold/0 percent hot to 50 percent cold/50 percent hot to 0 percent cold/100 percent hot CFM, and is thus a constant volume box.

• The Business Complex and the Music Building have , in certain parts of the facilities, true double- duct boxes with separate (and sometimes multiple) Mitco dampers (throttling devices) on both the cold duct and the hot duct. The larger boxes, for larger spaces served, required the splitting of the cooling and/or the heating CFM into multiple Mitco throttling devices (dampers). Ceiling space also drove the requirement for multiple Mitco’s. space-mounted pneumatic room thermostats modulate the hot and cold duct dampers, in a constant (total) volume fashion, to maintain the space temperature setpoint.

• Clara Belle Williams Hall and the Speech Building are equipped with boxes that contain three actuators. Upstream, the boxes have separate pneumatic actuators for the hot and cold duct airstreams and a third for total box volume. Mechanical devices within the box (and factory set and shipped) and the third actuator control total volume CFM for each box.

• Science Hall’s main Penthouse AHU is a dual-duct VAV system. The air handler has been retrofitted with DDC. All of the zone damper actuators remain pneumatic. The scope of work for this air handler includes the retrofit of all existing zone terminal boxes from pneumatic to DDC. There are 179 each Trox DD VAV terminal boxes, 3 each single-duct VAV boxes and 10 each constant volume DD boxes.

• John Whitlock Hernandez Hall’s eight-zone multi-zone air handler is equipped with a hot deck, cold deck and neutral deck. There is a 25-HP supply fan and a 5-HP return fan. The scope of work for this unit requires the conversion from multi-zone to VAV with VFDs.

• Foster Hall’s AHU-4 is a constant volume dual-duct air handler. It has been retrofitted with TAC DDCs. It has been partially converted to VAV with the addition of VFDs on the supply and relief fans. There are no duct static pressure sensors and the pneumatic dual-duct mixing boxes are constant volume. The scope of this retrofit includes the installation of new duct static and building static pressure sensors and to convert the mixing boxes from pneumatic constant volume to pressure independent VAV boxes. There are 23 each, Tuttle and Bailey type constant volume dual-duct mixing boxes with a single pneumatic actuator. These boxes will require mechanical and control modifications as noted below. There are 3 each, dual-duct mixing boxes with dual actuators. These boxes require control modifications only.

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Recommended Modifications

Ameresco proposes the installation of internal retrofit kits and Belimo linear and rotary damper actuators on and in the terminal units in the selected buildings, the necessary static pressure sensing and control devices on the air systems serving the boxes. Double-duct air systems without existing variable speed drives will be equipped with VFDs on both supply and return fan(s). Discharge/supply air temperature setpoint reset is to be integrated in to the box sequences. Multi-zone (true) supply air systems are to be de-coupled and separate zone damper actuators installed on the hot and cold side of the zone. The single-duct system at Young Hall will have new Belimo linear actuators installed on the existing Mitco throttling devices and they will be converted to two position. Internal retrofit kits will be installed in existing boxes and supply air system discharge temperature setpoint control will be integrated in to the box sequence.

The recommended modification of the sequence of operation of the existing terminal units/boxes is to include adjustable dead-band around adjustable room temperature setpoint. Minimum total box CFM to be equal to or greater than box/zone ventilation/exhaust CFM at all points in the sequence. On the heating side and on the low side of the deaband, the box CFM shall increase up to maximum heating CFM for each box. On the cooling side and on the high end of the dead-band, the box CFM shall increase up to maximum cooling CFM for each box. In both cases, the existing hot and cold duct dampers will operate in two position fashion and the new box total volume damper (kit) will be modulated by new internal Belimo linear actuator. Local controller will be connected to flow ring and pressure independent control employed.

With the zone in dead-band and no call for heating or cooling in the spaces served, the default air stream shall be selectable by the operator and during cooling mode shall be the hot duct. During heating mode, the default shall be the cold duct. The box minimum CFM must be satisfied from one or the other of the cold and hot ducts. If the heating plant is shut down during cooling mode, or vice versa, this sequence meets minimum CFM requirement with the supply air temperature close to the space temperature and avoids short cycling of boxes at dead-band.

Detailed Project Scope

The VAV Retrofit ECM modifies the existing VAV boxes and their sequence of operation to result in thermal savings in conditioning the spaces and electric fan energy expended at the primary air source/supply fan. Both the double-duct and single-duct VAV box sequences will be modified. To mitigate construction costs of taking the boxes down from their existing locations and/or modifying ductwork, strategic control components will be replaced and added resulting in an optimized sequence of operation. Minimum supply CFM from any given VAV box must be of a quantity which is at least equal to the ventilation CFM of that same VAV zone. Minimum heating CFM and minimum CFM are, in most cases, equal, but if minimums are different the differences will be incorporated into the sequence.

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The future sequence of operation will drive the volume of the box up to maximum CFM as the space temperature tries to vary from space temperature setpoint. At space temperature setpoint, the total box supply CFM to the space will be equal to the box zone minimum ventilation CFM. An adjustable dead-band will exist, allowing the operator to further optimize the energy usage by widening the dead- band or, conversely, making it more narrow. This addresses the breakeven load level when the heat gain in the box space approximately equals the heat loss to the outdoor air. Dead-band also allows a band of space temperature within which the occupants are comfortable. The midpoint of the space setpoint might be 75ºF, but if the deaband is +/-1.575ºF, the temperature in that space would be allowed to vary from 73.575ºF to 76.575ºF without any further expenditure of thermal or fan energy. The cooling and heating maximum CFMs are typically such that the heating maximum CFM is about half the maximum cooling CFM. The new controls shall, on an increase in cooling load in the box space/zone, increase the cooling CFM proportionally to the increase of cooling load up to maximum box cooling CFM. Simultaneously, the hot duct CFM shall be minimum or, most likely, 0 CFM. This avoids the simultaneous heating and cooling of the air and the mixing of same. As the cooling load in the space decreases, the box supply CFM will be at minimum total supply CFM and be back in the dead-band. Upon an increase in heating load, the new controls will increase the heating CFM proportionally to the heating maximum CFM.

Single-duct VAV boxes will be retrofitted with total box CFM modulation and supply air reset at the AHU serving the boxes. The supply air temperature will be reset upward until the box with the highest demand for cooling will be at 100 percent CFM box volume. All other boxes will have to reheat the supply air as their space zones demand more heating. A dead-band around setpoint can still exist for each box above which the cooling CFM is increased to the maximum cooling CFM for that box and conversely, will throttle down to minimum box CFM and heat the least CFM possible. The AHU, if equipped with a heating coil, will preheat the supply air to a temperature which can still be used for interior zones requiring less heating/more cooling.

Table D.5 provides a summary of the air handlers covered under the proposed measure.

Table D.5. Proposed VAV Retrofit AHUs

Building Unit HP SA CFM 032 Young Hall Main AHU 15 15,500 034 Foster Hall AHU-4 25 (2) 51,800 083 Milton Hall Room 115 DD AHU 15 16,000 184 Breland Hall N DD AHU 30 32,800 184 Breland Hall S MZ AHU 7.5 9,700 225 Astronomy Building Main AHU 20 18,000 278 Branson Library West DD AHU 75 86,400 278 Branson Library North DD AHU 50 53,200 288 Guthrie Hall AHU East 30 26,000 288 Guthrie Hall AHU West 40 39,000 364 English Building Main DD AHU 40 32,500 365 Speech Building Main DD AHU 25 22,000

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Table D.5. Proposed VAV Retrofit AHUs

Building Unit HP SA CFM 386 Business Complex Main Cooling AHU 60 40,600 386 Business Complex Main Heating AHU 30 33,400 389 Music Building 1st Floor AHU 15 12,150 389 Music Building 2nd Floor AHU 20 18,600 391 Science Hall PH AHU 60 (2) 130,000 397 Hernandez Hall AHU-1 15 15,500

Note: To facilitate this ECM, NMSU shall be responsible for the upgrade or furnishing and installation of any new JACEs that may be required. Ameresco’s controls subcontractor shall furnish and install all necessary controls where the new controls shall be capable of operating locally on a stand-alone basis specific to their protocol and NMSU shall be responsible for all JACE configurations. It is the intent that the controls subcontractor is not dependent on the JACE for operation of their controls. NMSU shall provide for all programming and configurations within Niagara including the revised sequences of operation, system graphics, trends, schedules, and alarms. NMSU shall also provide support for commissioning through Niagara to the individual field devices. NMSU will be responsible for providing all programming of the Niagara system within the timeframe agreed to in the construction schedule. This schedule will be updated weekly and reviewed during the construction progress meetings. > Building Detailed Scopes of Work The scopes of work vary by building and by system, but include, at a minimum, mechanical and control system retrofits.

Mechanical system retrofits include the modification of constant volume dual-duct terminal boxes and installation of premium efficiency motors and VFDs. There are primarily three types of terminal box retrofits required. A number of buildings utilize constant volume Tuttle and Baily or Anemostat type mixing boxes. These boxes require the installation of a new Titus (or equal) modulating damper and conversion of the existing mixing damper a two-position heating or cooling mode damper. Mitco terminal units require a similar retrofit. Other dual-duct mixing boxes utilize one pneumatic actuator controlling the hot and cold deck dampers through a reverse acting hot and cold deck linkage. These boxes will require mechanical separation of hot and cold dampers. New premium efficiency, inverter rated motors are required where the existing motors are not inverter rated and the new motors would be retrofitted with new belts and sheaves. New VFDs would be installed on supply and return fans where they are not yet installed.

The controls system scope includes the removal of all pneumatic controls and replacement with new DDC devices for each of the affected air handlers. The retrofit would reuse existing DDC systems to the fullest extent practical. The controls retrofit includes the installation of all new control elements as needed to control all terminal boxes and air handlers together with the modifications to the sequence of operation for static pressure reset with direct coordination and supervision by NMSU ‘s Manager or

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Energy Management Services and Ameresco. Control sequence modifications shall be initially developed by Ameresco and NMSU for subcontractor’s implementation.

Individual Building Detailed Scopes of Work

Building 032 Young Hall – Roof-mounted PRTU: This unit shall be converted from constant volume single-duct MITCO external actuator to single-duct VAV with DDCs on the air handler and the boxes. All existing zone devices are variable volume pneumatic. The scope of work for this air handler requires removal of all existing pneumatic air handler and zone controls and replacement with new, pressure independent DDC components, so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM down to a box minimum CFM (for box zone ventilation) across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are, approximately, 21 Singer brand variable volume single-duct VAV boxes with one external MITCO and pneumatic actuators and a pneumatic three-way hot water control valve. These boxes will require mechanical and control modifications.

Building 034 Foster Hall - AUH-4 is a constant volume dual-duct air handler. It has been retrofitted with TAC DDCs. It has been partially converted to VAV with the addition of VFDs on the supply and relief fans. There are no duct static pressure sensors and the pneumatic dual-duct mixing boxes are constant volume. The scope of this retrofit requires installation of new duct static and building static pressure sensors and to convert the mixing boxes from pneumatic constant volume to pressure independent VAV boxes. There are 20 Tuttle and Bailey type constant volume dual duct mixing boxes with a single pneumatic actuator. These boxes will require mechanical and control modifications. There are 3 dual- duct mixing boxes with dual actuators. These boxes require control modifications only.

Building 075 Business Complex - Cabinet Fans 1 and 2: These units shall be converted from variable air volume double-duct multiple MITCO throttling devices and external pneumatic actuators to double-duct VAV with DDCs on the air handler and the boxes. All existing zone devices are variable volume pneumatic. The scope of work for this air handler requires removal of all existing pneumatic air handler and zone controls and replacement with new, pressure independent DDC components so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM down to a box minimum CFM (for box zone ventilation) across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are approximately 75 boxes equipped with multiple MITCO brand throttling devices and multiple pneumatic actuators. These boxes will require mechanical and control modifications as noted below.

Building 083 Milton Hall - First Floor Mechanical Room 155A: This unit shall be converted from variable volume dual-duct two external pneumatic actuators to dual-duct VAV with DDCs on the air handler and the boxes. All existing air handler and zone devices are constant volume pneumatic. The scope of work for this air handler requires removal of all existing pneumatic zone controls including valve bodies and valve actuators and replacement with new, pressure independent DDC components, so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM down to a box

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minimum CFM (for box zone ventilation), across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are approximately 21 Krueger LMHDPE-9 brand variable volume dual-duct mixing boxes with two external pneumatic actuators. These boxes will require mechanical and control modifications as noted below.

Room 015 Milton multi-zone AHU: The seven-zone multi-zone air handler is equipped with a hot deck and cold deck. There is a supply fan and no return fan. The controls are entirely DDC including zone damper actuation. The scope of work for this unit requires conversion from multi-zone to VAV with VFDs. The unit already has a supply fan VSD.

Building 184 Breland Hall - Supply Fan-1 is contained in the north rooftop Penthouse as a part of the built-up unit. These units shall be converted from variable volume dual-duct external MITCO throttling devices and pneumatic actuators to dual-duct VAV with DDCs on the air handler and the boxes. All existing zone devices are variable volume pneumatic. The scope of work for these air supply and return systems requires removal of all existing pneumatic zone controls and replacement with new, pressure independent, DDC components, so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM down to a box minimum CFM (for box zone ventilation) across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are approximately 24 Tuttle & Bailey brand constant volume dual-duct mixing boxes with a single pneumatic actuator. These boxes will require mechanical and control modifications as noted below.

The multi-zone air handling unit is contained in the south. rooftop penthouse as a part of the constant volume system serving the office area. This unit shall be converted from true multi-zone to variable volume reusing the zone distribution ductwork. VSDs will be added to supply and return fans. The chilled water control valve will be replaced under the chilled water pump bypass ECM.

Mult-zone AHU: The 10-zone true multi-zone air handler is equipped with a hot deck and a cold deck. There is a 7.5-HP supply fan and a 3-HP return fan. The controls are mostly pneumatic with hot deck and cold deck temperature controlled by local DDC. The hot water valve is three-way DDC and the cold deck is pneumatic three-way with bypass leg removed. The scope of work for this unit requiresconversion from multi-zone to VAV with VFDs.

Building 225 Astronomy Building - Basement AHU-1: This unit shall be converted from constant volume dual-duct two external actuators to-dual duct VAV with DDCs on the air handler and the boxes. All existing zone devices are constant volume pneumatic. The scope of work for this air handler requires the removal of all existing pneumatic zone controls and replacement with new, pressure independent DDC components, so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM down to a box minimum CFM (for box zone ventilation) across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are approximately 31 Price RNP type constant volume dual-duct mixing boxes with two external pneumatic actuators. These boxes will require mechanical and control modifications as noted below. The supply fan motor is already inverter rated.

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Building 278 Branson Library - North and south penthouse Supply Fans 1 and 2 and Return Fans 1, 2, and 3: These units shall be converted from constant volume dual-duct single actuator to dual duct VAV with DDCs on the air handler and the boxes. All existing zone devices are constant volume pneumatic. The scope of work for these air supply and return systems requires removal of all existing pneumatic zone controls and replacement with new, pressure independent, DDC components, so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM down to a box minimum CFM (for box zone ventilation) across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are approximately 63 Tuttle and Bailey type constant volume dual duct mixing boxes with a single pneumatic actuator. These boxes will require mechanical and control modifications as noted below. All four of the supply and return fans motors are already inverter rated.

West penthouse Supply Fan-1 and Exhaust Fans 1–4: This unit shall be converted from constant volume dual-duct single actuator to dual duct VAV with DDCs on the air handler and the boxes. All existing zone devices are constant volume pneumatic. The scope of work for these air supply and return systems requires removal of all existing pneumatic zone controls and replacement with new, pressure independent, DDC components, so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM down to a box minimum CFM (for box zone ventilation) across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are approximately 76 Tuttle and Bailey type constant volume dual-duct mixing boxes with a single pneumatic actuator. These boxes will require mechanical and control modifications as noted below. The supply fan already has a VSD.

Building 288 Guthrie Hall - Basement supply fans SF-1 and SF-2 are contained in the built-up unit: These units shall be converted from constant volume dual-duct single actuator to dual-duct VAV with DDCs on the air handler and the boxes. All existing zone devices are constant volume pneumatic. The scope of work for these air supply and return systems requires removal of all existing pneumatic zone controls and replacement with new, pressure independent, DDC components so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM down to a box minimum CFM (for box zone ventilation) across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are approximately 37 Anemostat HVE-10 MBV L-J type constant volume dual-duct mixing boxes with a single pneumatic actuator. These boxes will require mechanical and control modifications as noted below.

Buildings364 Clara Belle Williams Hall (English) and Building365 Speech Building - English Room 123 and Speech Building outh Penthouse built-up units: These units shall be converted from variable volume dual-duct three internal pneumatic actuators in box to dual duct VAV with DDCs on the air handler and the boxes. All existing air handler and zone devices are variable volume pneumatic. The scope of work for this air handler requires removal of all existing pneumatic zone controls including valve bodies and valve actuators and replacement with new, pressure independent, DDC components, so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM

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down to a box minimum CFM (for box zone ventilation) across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are approximately 55 Krueger LMHD 1-10 brand variable volume dual-duct mixing boxes with three internal pneumatic actuators. These boxes will require mechanical and control modifications as noted below.

Building 389 Music Building - AHU-3A and AHU-4A (north mechanical rooms.): These units shall be converted from variable air volume double-duct multiple MITCO throttling devices and external pneumatic actuators to double-duct VAV with DDCs on the air handler and the boxes. All existing zone devices are variable volume pneumatic. The scope of work for this air handler requires removal of all existing pneumatic air handler and zone controls and replacement with new, pressure independent, DDC components so as to provide for accomplishing total box CFM output supply to vary from the heating maximum CFM down to a box minimum CFM (for box zone ventilation) across an adjustable dead-band around space setpoint and then up to cooling maximum CFM. There are approximately 37 boxes equipped with multiple MITCO brand throttling devices and multiple pneumatic actuators. These boxes will require mechanical and control modifications as noted below.

Building 391 Science Hall – The main penthouse AHU at Science Hall is a dual-duct VAV system. The air handler has been retrofitted with DDC. All of the zone damper actuators remain pneumatic. The scope of work for this air handler requires a retrofit of all existing zone terminal boxes from pneumatic to DDC. There are 179 Trox DD VAV terminal boxes, three single-duct VAV boxes and 10 constant volume DD boxes.

Building 397 John Whitlock Hernandez Hall – The eight-zone multi-zone air handler is equipped with a hot deck, cold deck, and neutral deck. There is a 25-HP supply fan and a 5-HP return fan. The controls are entirely pneumatic. The scope of work for this unit requires conversion from multi-zone to VAV with VFDs.

Energy Savings Proposed

The savings for this measure are a result of the reduction in the amount of thermal and electrical fan energy to maintain the space temperatures at setpoint. Savings are also achieved by elimination or minimizing of the amount of mixing (simultaneous heating and cooling) of the heating and cooling airstreams. Savings are also achieved by reducing the supply air quantity to the space in off-peak periods and by the implementation of a dead-band control range to space temperatures.

Ameresco developed detailed eQUEST models to determine the energy savings associated with the project. The energy savings will result from the improved operation and efficiency of the HVAC systems. Table D.6 summarizes the energy savings associated with this project.

Table. D.6. Energy Savings Associated with ECM 7

Annual Savings Units 2,712,476 kWh

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378.7 kW -2,398 DTh, Natural Gas $172,553 Utility Cost Savings > Energy Ameresco calculated the energy savings for this measure using calibrated building simulation models. Ameresco developed calibrated baseline energy simulation models for a statistically relevant number of campus buildings to represent the population of measures to be installed. The inputs for the individual building models were developed to match the existing building conditions, including as-built construction specifications and the operation of the buildings concurrent with the time period associated with the utility baseline (September 2011 – August 2012). These inputs include project and site conditions, building shells with architectural details and constructions, internal loads such as lighting density and schedules, water-side loads and schedules, and air-side loads and schedules. The baseline models’ energy consumption was calibrated using NMSU provided building sub-meter data for electricity, natural gas, chilled water, and steam utilities. Calibrations were made to the utility data according to IPMVP guidelines.

Parametric analysis was performed on each individual building model for each measure in a manner that captured the interactive effects of each of the proposed ECMs. Results from the modeled building measures were extrapolated to the remaining population of building measures. The combined modeled and extrapolated results were applied to a calibrated whole campus model, including the Central Utility Plant. Parametric analysis of this calibrated whole campus model captured the interactive effects of proposed ECMs on central plant chilled water production, steam production, and electric and natural gas utility consumption. The resulting central plant energy consumption savings as indicated by the whole campus model were then credited to the individual building measures on a pro-rated basis to capture the plant level impacts of the measures on a per building basis.

Detailed models and results are available electronically for review or on-going M&V purposes.

> Maintenance No maintenance savings are claimed for this ECM. However, the reduced loads on the equipment may extend the useful life and are expected to reduce the maintenance and repair costs associated with equipment run hours. Reducing the load will free up cooling capacity, allowing existing equipment to meet expanded internal loads that may have been installed since design (e.g. computer loads, A/V equipment, etc.). The reduction in total airflow will reduce the load on the filtration systems serving the air handling equipment and may extend filter life. > Interactions Supply fan turndown will reduce thermal and electric fan energy at the air handler. VAV Retrofit will interact with night setback/set-up, optimum start/stop, and morning cool-down/warm-up. The morning cool-down/warm-up period load is reduced due to the reduced ventilation rates during the low-

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occupancy or unoccupied periods. The cool-down/warm-up period length is directly proportional to the load. The optimum start sequence will reduce the warm-up/cool-down period length as the time to meet setpoint is reduced. The hardware modifications make it possible to use the outdoor air dampers and exhaust fan control to purge the mass heat accumulated during the previous afternoon via the exhaust fans/outdoor air dampers instead of mechanical cooling when outdoor air conditions permit.

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References

Data obtained from facility:

NMSU Niagara Building Automation System Architectural, structural, mechanical, and electrical drawings Electricity bills Natural gas bills General Data:

Field notes HVAC manufacturer catalogs

Assumptions

The following assumptions were made in the development of this proposal:

VAV Retrofit ECM assumes return/exhaust fans are functional and are being run. Supply CFM estimates from mechanical drawings schedules. The savings for the measure are based on NMSU supplied run hour schedules. Heating and cooling capacities of the units are based on nameplate data and building’s mechanical drawings. All work surfaces are free of asbestos and other hazardous materials. NMSU is responsible for any hazardous material abatement.

Utility Interruptions

Electric interruption will be isolated and its duration minimized through carefully planned installation phasing. Installation schedules will be coordinated with site personnel to minimize the impact on building occupants.

Other > Equipment Service Life The equipment service life for the major components includes:

Variable speed drives – 15 years Control systems – 15 years Electric motors – 15 years

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> Warranty Ameresco provides a 1-year warranty for materials and labor for the retrofit. > Interface with Existing Equipment The VAV retrofit equipment and devices interface with existing CV and VAV boxes currently installed at listed facilities. Provisions for varying air quantities to boxes that were previously constant volume are included in this ECM including static pressure sensors and variable speed drives. Replacement of existing pneumatic room thermostats is included in this ECM. Existing pneumatic actuators at and inside existing terminal units, CV boxes and/or existing VAV boxes is included in this ECM.

ECM 10: Economizer Upgrade or Repair

General Description > ECM Summary For buildings identified in the ECM Matrix, Ameresco proposes to refurbish, repair, upgrade, or replace the economizer dampers and the controls that operate them. A high number of hours of occurrence at which free cooling is available make significant mechanical electric cooling energy savings possible for NMSU. Most air handling systems have 100 percent outdoor air capability and are equipped with return fans to make utilization of (untreated) outdoor air for cooling needs possible. The outdoor air, return air, and relief airstreams are typically equipped with control dampers and associated controls to throttle and mix these airstreams to provide cooling to the spaces served. Unlike manual (operated) dampers, these control dampers are designed to control the airstream quantities (CFMs) in a fairly precise manner and typically have somewhat linear characteristics which control the airflow accurately. These dampers include shafts riding in bushings or bearings and modulate open and close numerous times over their useful life as the cooling load and outdoor air condition change. This ECM includes restoring these dampers (and the controls associated with them) to industry standards. Most of the damper actuators were originally the pneumatic type. Many have already been converted to electronic/ DDC.

> Existing Conditions During the energy audit, Ameresco found several economizer configurations. Most air systems are dual- duct with 100 percent outdoor air capability and are equipped with a return fan. Young Hall, Health and Social Services Building, Milton Hall (KRWC Studio), and the Music Building’s single zone units are configured like the dual-duct units except each has only one supply duct with a heating and cooling coil in series. Branson Hall (west) has four exhaust fans that act as a relief fan, and the Business Complex and Zuhl Library have separate heating and cooling supply fans. Some of the smaller single-zone units serving Milton Hall have outdoor intake, but no integral relief or return damper.

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A large number of economizer air systems have pneumatic damper actuators, while others have been retrofitted with high torque electronic (DDC) actuators.

The economizer dampers are typically opposed blade control dampers and are span a wide range of age and condition. Some are installed in exterior walls and others are integral to the air handling equipment. Some of the dampers are in need of repairs, including linkages.

Detailed Project Scope

Table D.7 provides a list of the air handlers identified in the scope of work for this measure.

Table D.7. Economizer AHUs

Building Unit Type CFM 032 Young Hall PRTU SD VAV 15,501 034 Foster Hall AHU-2 SD VAV 30,000 034 Foster Hall AHU-3 SD VAV 36,000 034 Foster Hall AHU-4 DD 51,800 083 Milton Hall AHU-1 DD 16,000 083 Milton Hall AHU-2 SZ 11,810 184 Breland Hall AHU-1 DD 32,800 184 Breland Hall AHU-2 MZ 9,700 187 Chemistry Building AHU-8A DD VAV - 187 Chemistry Building AHU-8B DD VAV - 225 Astronomy Building AHU-1 DD 18,000 244 Gerald Thomas Hall AHU BASEMENT DD - 244 Gerald Thomas Hall AHU EAST DD 19,500 244 Gerald Thomas Hall AHU WEST DD - 278 Branson Library DD WEST DD 86,400 278 Branson Library DD SF NORTH DD 26,605 278 Branson Library DD SF NORTH DD 26,605 288 Guthrie Hall SF-1 DD 26,000 288 Guthrie Hall SF-2 DD 39,000 363 Engineering Complex 1 F-2 DD VAV 30,000 363 Engineering Complex 1 LF-1 SD 15,000 363 Engineering Complex 1 LF-2 SD 15,000 363 Engineering Complex 1 LF-3 SD 15,000 364 English Building RTDD DD 32,500 365 Speech Building PHDD DD 22,000 386 Business Complex CF-1 DD CLG 40,610 389 Music Building 1A SZ 12,500 389 Music Building 2A SZ 3,460 389 Music Building 3A DD 12,150 389 Music Building 4A DD 18,600 389 Music Building 5A SZ 4,000 389 Music Building 6A SZ 9,000 391 Science Hall PH AHU DD VAV 130,000 397 Hernandez Hall AHU-2 DD VAV 25,450 397 Hernandez Hall AHU-1 MZ 15,500 461 Zuhl Library AHU-1 DD 56,000 461 Zuhl Library AHU-2 DD 56,000

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Table D.7. Economizer AHUs

Building Unit Type CFM 541 Foreman Engineering Complex AHU-1 SD VAV 14,800 541 Foreman Engineering Complex AHU-2 SD VAV 26,500 541 Foreman Engineering Complex AHU-3 SD VAV 7,300 541 Foreman Engineering Complex AHU-4 SD VAV 28,700 541 Foreman Engineering Complex AHU-5 SD VAV - 541 Foreman Engineering Complex AHU-6 SD VAV 13,150 590 Health and Social Services AHU-1 DD 35,000 590 Health and Social Services AHU-2 DD 35,000

The scope of work includes refurbishment, repair, and replacement of all economizer control dampers serving the listed air systems. The work is divided into mechanical and control scopes to accommodate the appropriate trades.

The intent of this retrofit is to reduce the electric energy consumption of the mechanical cooling equipment serving the buildings. This is achieved through by the upgrade or refurbishment of the mixed air economizers. This work includes replacement of pneumatic devices with DDC devices and installation of new DDC points. The mechanical scope includes the repair or refurbishment of the mixed air economizer dampers as needed to facilitate proper mechanical economizer operation. This scope includes on an as needed basis the following work.

• Refurbish all existing outdoor air, return air, relief air, and/or exhaust air dampers whether located in wall, ceiling, floor, partition or integral to the air handling equipment.

• Replace blade edge seals, blade shaft bushings or bearings, couplings, linkage brackets, and mounting plates.

• Realign any components to allow smooth operation of damper section without undue force or torque.

• Reattach any disconnected component and repair damage from manual blocking off or other manipulation of the dampers.

• Replace, in kind, any dampers that are deemed by Ameresco to no longer be serviceable to Ruskin CD-35 or better.

The controls scope includes testing and repair or furnishing and replacement of the mixed air economizer damper actuators, sensors, and controls as needed to facilitate proper dry-bulb temperature comparative economizer control and operation. This scope includes, on an as needed basis, the following work as determined by Ameresco.

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• Replace pneumatic damper actuators with DDC actuators Belimo or approved equal. Provide high torque models and submit selections to Ameresco and NMSU before installing.

• Remove copper tubing associated with pneumatic damper actuators at the point of connection and permanently cap and seal all related pneumatic tubing.

• Remove poly pneumatic tubing back to wall or source and permanently cap and seal. Remove pneumatic actuator mounting plate, bracket, linkage, couplings, and kits.

• Integrate the new DDC damper actuators into the DDC system utilizing the existing controller outputs.

• Furnish and install any new DDC sensors and controls as needed for mixed air damper and economizer control.

• Perform a point-to-point test of all points associated with the operation and control of each outside air, return air, exhaust air, or relief air damper together with their related sensors and controls.

• Perform functional performance testing of the mixed air economizer in each mode of operation including, occupied and unoccupied mode, morning start-up/cool down, economizer mode, night cycle, mixed air temperature reset and control, cooling mode and heating mode.

• Any systems employing CO2 control shall override use of return air to maintain return air CO2 setpoint.

• Set-up all trends, build all graphics, and create any user inputs for fine tuning each individual system.

• The controls subcontractor shall be responsible for modifying the sequence of operation as needed for each air handler’s economizer operation with direct coordination and supervision by NMSU ‘s Manager or Energy Management Services and Ameresco. Control sequence modifications shall be initially developed by Ameresco and NMSU for subcontractor’s implementation.

Note: To facilitate this ECM, NMSU shall be responsible for the upgrade or furnishing and installation of any new JACEs that may be required. Ameresco’s controls subcontractor shall furnish and install all necessary controls where the new controls shall be capable of operating locally on a stand-alone basis, specific to their protocol, and NMSU shall be responsible for all JACE configurations. It is the intent that the controls subcontractor is not dependent on the JACE for operation of their controls. NMSU shall provide for all programming and configurations within Niagara including the revised sequences of operation, system graphics, trends, schedules, and alarms. NMSU shall also provide support for commissioning through Niagara to the individual field devices. NMSU will be responsible for providing

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all programming of the Niagara system within the timeframe agreed to in the construction schedule. This schedule will be updated weekly and reviewed during the construction progress meetings.

Energy Savings Proposed

Ameresco developed detailed eQUEST models to determine the energy savings associated with the project. The energy savings will result from the improved operation and efficiency of the HVAC systems. Table D.8 summarizes the energy savings associated with this project.

Table. D.8. Energy Savings Associated with ECM 10

Annual Savings Units 1,470,702 kWh 89.8 kW -46 DTh, Natural Gas $96,358 Utility Cost Savings > Energy Ameresco calculated the energy savings for this measure using calibrated building simulation models. Ameresco developed calibrated baseline energy simulation models for a statistically relevant number of campus buildings to represent the population of measures to be installed. The inputs for the individual building models were developed to match the existing building conditions, including as-built construction specifications and the operation of the buildings concurrent with the time period associated with the utility baseline (September 2011 – August 2012). These inputs include project and site conditions, building shells with architectural details and constructions, internal loads such as lighting density and schedules, water-side loads and schedules, and air-side loads and schedules. The baseline models’ energy consumption was calibrated using NMSU provided building sub-meter data for electricity, natural gas, chilled water, and steam utilities. Calibrations were made to the utility data according to IPMVP guidelines.

Detailed models and results are available electronically for review or on-going M&V purposes.

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> Maintenance No maintenance savings are claimed for this ECM. Refurbishment of economizer dampers may reduce maintenance and repair resources expended by NMSU by reducing unscheduled repair work associated with age and condition of existing dampers and the actuators, and linkage.

> Interactions This ECM will reduce the mechanical electrical cooling load on the central plant. For air systems currently equipped with CO2 sensors and controls a definite and important interaction exists. The governing factor is the space CO2 level. The CO2 level will override the economizer free cooling mode and increase outdoor air quantity to lower the CO2 regardless of free cooling availability. Any cold deck (setpoint) reset strategies will remain intact and reset the mixed air temperature setpoint in like manner. Minimum outdoor air CFM will be maintained for ventilation requirements and if that drives supply air above required setpoint, the system will switch to mechanical cooling. Warm-up and/or cool- down before occupancy strategies will take advantage of outdoor air condition in real time and introduce outdoor air to the advantage of NMSU.

References

Electric bills and NMSU usage logs and records

Field notes, survey data, logger data, and trend logs.

Mechanical drawings and mechanical equipment schedules.

Nametag data and manufacturer’s published data.

Assumptions

Assumptions made in the development of this proposal include:

The savings for the measure are based on NMSU’s supplied run-hour schedules.

All work surfaces are free of asbestos and other hazardous materials. NMSU is responsible for any hazardous material abatement.

Utility Interruptions

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Other > Equipment Service Life The equipment service life for the major components includes:

Control dampers – 20 years DDC damper actuators – 15 years Control devices – 15 years > Warranty Ameresco provides a 1-year warranty for materials and labor for the retrofit.

> Interface with Existing Equipment The retrofit of the existing economizer dampers will have a minimal impact on the air side systems serving the facility. Retrofitting the dampers will reduce the mechanical electrical energy consumption at the Central Utility Plant facility and lower the cooling load demand.

ECM 12: Chilled Water Pump Bypass

General Description > ECM Summary For each building identified in the ECM Matrix, Ameresco proposes to install chilled water bypass valves on all tertiary (building) chilled water pumps served by the central plant. These systems will include all requisite isolation valves, strainers, and other hydronic specialty equipment and devices. Any existing chilled water coils currently equipped with three-way control valves (or wild coils) will be converted to two-way DDC actuated control valves (wherever possible). The existing chilled water pumps shall remain in place and operational (remotely) in the event a failure of central plant flow occurs, the existing chilled water pumps will automatically energize and provide chilled water flow to the building. Recent changes to the primary chilled water pumping systems now make primary variable flow possible when combined with this measure. (Static) water pressure sensors located at major chilled water coils and fan coil circuits will make reset strategies possible for the central plant. Electrical pump energy is reduced both at the building level and at the plant level.

Several building chilled water distribution configurations exist at the various buildings included in this ECM, and in some of the buildings multiple and remote chilled water pumps serve various phases of the individual buildings through evolution since the original construction. For example,Branson Library has undergone recent construction for the east systems that, although updated on the airside equipment, is still served by a chilled water pump at the bottom of the east chase. Most buildings have typical dual chilled water pumps piped in parallel that distribute chilled water to their particular array of AHU and

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FCU chilled water coils. Some (static) water pressure sensors have already been installed for local CHWP VSD control and extensive replacement of three-way chilled water control valves with DDC two-way chilled water control valves.

> Existing Conditions Existing chilled water “circulating” systems have, as the buildings evolved from original construction, been used during the “shoulder months” (fall & spring) to throttle the central plant return water back maintaining a target plant chilled water return temperature. These systems raise the chilled water supply temperature to the chilled water coils. To prevent runaway flow conditions which drive the central plant delta T (differential temperature) down and force the central plant to run more chillers than thermally necessary. These recirculating configurations are to be discontinued in this ECM as they will no longer be needed. The valves will be closed and locked.

Some of the “tunnel valves” and flow meters pose unnecessary drops in water pressure due to being sized for previous system configurations and flow rates. New, properly sized, flow meters are not included in this ECM (these may be a future request by NMSU), but replacement of the “tunnel valves” that are currently undersized is included in this ECM.

Recommended Modifications

Ameresco recommends modifications of existing tertiary (building) chilled water distribution systems. With recent central plant configuration and pumping capabilities, it has become possible to reduce electrical pumping energy being expended to distribute the chilled water to the chilled water cooling coils served by the plant. The provision of keeping the existing pumps operational is also recommended in the event of plant complications during which they may be needed. Strainers and shut-off valves are included in Ameresco’s recommendation as is converting all existing three-way chilled water control valves to two-way in order to take full advantage of the bypass system. Strategically placed (static) water pressure sensors are included so that the plant can reset pressures and vary pumping resources to optimize the central plant. Any “wild” coils will be equipped with new two-way control valves and appropriate DDCs.

Detailed Project Scope

Note: To facilitate this ECM, NMSU shall be responsible for the upgrade or furnishing and installation of any new JACEs that may be required. Ameresco’s controls subcontractor shall furnish and install all necessary controls where the new controls shall be capable of operating locally, on a stand-alone basis, specific to their protocol and NMSU shall be responsible for all JACE configurations. It is the intent that the controls subcontractor is not dependent on the JACE for operation of their controls. NMSU shall provide for all programming and configurations within Niagara including the revised sequences of operation, system graphics, trends, schedules, and alarms. NMSU shall also provide support for commissioning and testing through Niagara to the individual field devices. NMSU will be responsible for providing all programming of the Niagara system within the timeframe agreed to in the construction

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schedule. This schedule will be updated weekly and reviewed during the construction progress meetings.

The intent of this retrofit is to reduce the electric energy consumption of the selected chilled water pumps at NMSU facilities. This is achieved through installation of the chilled water bypass piping and controls, shutting down the tertiary pumps, and implementing a primary pump chilled water static pressure reset control sequence. The mechanical scope is summarized below:

• Demolish and remove pipe insulation and piping as needed to facilitate installation of the new bypass piping assemblies.

• Relocate any existing drains, test ports, valves, strainers or other appurtenances as needed to facilitate the installation.

• Fabricate and install the chilled water bypass pipe assembly including all necessary valves, strainers and fittings.

• Pipe materials shall match the existing material in each location.

• Pipe diameters shall match the existing diameters at each point of connection.

• Pipe fitting methods shall match existing in each location (flanged, welded, or soldered)

• Valve and fitting pressure ratings shall match existing in each location.

• Insulation material, thickness, and jacketing shall be furnished and installed to match the existing material, thickness, and jacketing materials.

• Each bypass assembly over 2.5” shall include two-wafer type full-port butterfly isolation valves with bare stem and lever lock (200 PSI and 180ºF) and one, two position butterfly control valve.

• The installation of new strainers or the relocation of existing strainers will be identified on a case by case basis as per the scope of work documents. All newly furnished strainers shall be equipped with a drain valve and hose fitting.

• Furnish and install any necessary piping supports or hangers as needed.

• For in-line pumps, the bypass piping shall be located in a manner that allows access to the pump for maintenance purposes. For locations with end suction pumps, the bypass piping shall be located overhead at or near the same level of the existing supply and return piping.

• Recharge and air bleed the chilled water piping as needed.

• Leak testing shall be done by “in-service” testing at the system operating pressure.

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• Cooling coil control valves shall be furnished by the controls subcontractor and installed by the mechanical subcontractor. The mechanical subcontractor shall permanently cap and seal three- way valve recirculation pipes where replacing valves with two-way valves.

• Chilled water static pressure and differential pressure sensors shall be furnished by the controls subcontractor and installed by the mechanical subcontractor.

The majority of buildings listed are currently equipped with Schneider TAC Xenta DDC systems and/or a combination of pneumatic and DDC. All new controllers shall be Schneider Xenta or approved equal. Each building is equipped with a JACE communicating to a Niagara front end over the campus network.

The following buildings are currently equipped with Xenta controllers. Spare DDC points are available for each bypass valve and can be utilized for this work. New controllers or controller expansion devices shall be furnished at any location as needed to accommodate the new points.

Building 034 Foster Hall Building 187 Chemistry Building Building 244 Gerald Thomas Hall Building 363 Engineering Complex I, (EC I) Building 368 Knox Hall Building 391 Science Hall Building 397 John Whitlock Hernandez Hall, (EC-II) Building 551 Skeen Hall Building 032 Young Hall Building 033 Kent Hall Building 035 William B. Conroy Honors Building 060 Dan W. Williams Hall Building 172 Hadley Hall Building 389 Music Building Building 083 Milton Hall Building 225 Astronomy Building Building 365 Speech Building Building 461 Zuhl Library Building 590 Health and Social Services Building

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The following buildings either do not currently have DDC or have BACnet controls. These buildings shall be retrofitted with new BACnet controls with provisions as noted above for additional points.

Building 184 Breland Hall Building 248 Regents Row Building 278 Branson Hall

Division 25 of the NMSU specifications requires BACnet; however, retrofit work on existing chilled water pump systems is Lonworks or BACnet as indicated above

The control scope of work includes all electrical power wiring, conduit, circuit breakers, and control transformers. Where necessary, Ameresco shall demolish and remove existing pneumatic field devices to facilitate the installation of the new control elements. All pneumatic terminations shall be permanently closed and properly sealed. The related pneumatic tubing shall be removed to the point of wall or ceiling penetrations.

Ameresco shall furnish and install all control elements necessary for a complete functioning system. This includes all sensors, controllers, control transformers, wiring, conduit, enclosures, and other devices as needed..

Bypass valves – Ameresco shall furnish bypass valves. All bypass valves shall be two position butterfly valves with fail-safe, spring return, closed position. All valves shall utilize full lug butterfly-type control valves rated for the same operating pressure as the piping system in which such valves are installed. Valves shall have bubble tight shut-off against either side of the valve. Valves shall have positive positioners or oversized operators if required for proper sequence control

Globe valves – Ameresco shall provide straight through pattern-type, two-way, union globe valves. Valves ½" to 2" in size shall have bronze, brass, stainless steel or approved corrosion resistant bodies and screwed ends. Valves 2½" and larger shall have high-tensile cast iron or cast steel bodies, bronze stainless steel or approved corrosion resistant seats and trim and flanged ends. All valve stems shall be 316 or 416 stainless steel. Valves shall be designed to provide equal percentage flow characteristics at constant pressures with a range of 300 to one. Low-pressure valves shall be provided with a renewable composition disc compound that will ensure tight seating.

Water differential pressure sensors shall have a minimum range of 0 to 50 PSID with overpressure protection as required by the application. Ameresco shall install a sensor with a three-valve manifold and provide siphons and pressure snubbers, as required.

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Energy Savings Proposed

Ameresco developed detailed eQUEST models to determine the energy savings associated with the project. The energy savings will result from the improved operation and efficiency of the HVAC systems. Table D.9 summarizes the energy savings associated with this project.

Table. D.9. Energy Savings Associated with ECM 12

Annual Savings Units 1,066,203 kWh 72.8 kW -155 DTh, Natural Gas $79,035 Utility Cost Savings

> Energy Ameresco calculated the energy savings for this measure using calibrated building simulation models. Ameresco developed calibrated baseline energy simulation models for a statistically relevant number of campus buildings to represent the population of measures to be installed. The inputs for the individual building models were developed to match the existing building conditions, including as-built construction specifications and the operation of the buildings concurrent with the time period associated with the utility baseline (September 2011 – August 2012).These inputs include project and site conditions, building shells with architectural details and constructions, internal loads such as lighting density and schedules, water-side loads and schedules, and air-side loads and schedules. The baseline models’ energy consumption was calibrated using NMSU provided building sub-meter data for electricity, natural gas, chilled water, and steam utilities. Calibrations were made to the utility data according to IPMVP guidelines.

Parametric analysis was then performed on each individual building model for each measure in a manner that captured the interactive effects of each of the proposed ECMs. Results from the modeled building measures were then extrapolated to the remaining population of building measures. The combined modeled and extrapolated results were then applied to a calibrated whole campus model, including the Central Utility Plant. Parametric analysis of this calibrated whole campus model captured the interactive effects of proposed ECMs on central plant chilled water production, steam production, and electric and natural gas utility consumption. The resulting central plant energy consumption savings as indicated by the whole campus model were then credited to the individual building measures on a pro-rated basis to capture the plant level impacts of the measures on a per building basis.

Detailed models and results are available electronically for review or on-going M&V purposes.

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> Maintenance Maintenance savings are not claimed for this ECM. At the same time, nearly all maintenance and repair of tertiary (building) pumps will become unnecessary as these pumps will typically not be in use. Annual inspections, testing, and “exercising” these pumps is recommended.

> Interactions This ECM will interact with any other system or action that involves chilled water flow in the buildings. Interactions with the central plant will occur as the cooling load on each building changes. The reset strategies employed by the plant will be augmented by selected (static) water pressure at various strategically located in each buildings chilled water distribution systems (pipes). Utilizing integrated control system, the plant can automatically identify the worst case point in the system and reset pump speeds accordingly. This optimizes the plant and allows the plant to pump according to actual thermal load. Avoiding over pumping and low delta T across the plants, unnecessary chillers will not have to be brought on line.

References

Utility data

Field notes, survey data, logger data and trend logs.

Record drawings and submittal records.

Niagara trend and graphic data

Assumptions

Assumptions made in the development of this proposal include:

The savings for the measure are based on observed schedules.

All work surfaces are free of asbestos and other hazardous materials. NMSU is responsible for any hazardous material abatement.

Utility Interruptions

Chilled water availability for individual buildings during pipe modification work will be isolated to the area of work and its duration minimized through carefully planned installation phasing. Installation schedules will be coordinated with site personnel to minimize the impact on building occupants.

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Other > Equipment Service Life The equipment service life for the major components includes:

Bypass control valves – 20 years Controls and sensors – 15 years Hydronic equipment and devices – 15 years > Warranty Ameresco provides a 1-year warranty for materials and labor for the retrofit. Interface with Existing Equipment

ECM 26: Satellite Plant Energy Savings

General Description > ECM Summary NMSU recently added the new Satellite Utility Plant (SUP) to meet existing and future chilled water capacity for the Las Cruces campus. The plant includes a new 2,500-ton duplex chiller and a new glycol ice production chiller rated at 877 tons. The new plant also has a new 250-HP variable primary chilled water distribution pumps together with 100-HP condenser water and glycol pumps. The ice storage system includes 72 Calmac 1500 ice storage tanks coupled with a plate and frame heat exchanger. The condenser water loop has a three cell counter flow cooling tower with three 50-HP variable speed fans.

The new satellite plant displaces existing CUP chillers with the new duplex chiller during off-peak periods and increases the chilled water thermal storage capacity for use during summer on-peak periods. Modifications to the primary chilled water piping allow for the bypass of the existing tertiary pumps (ECM-12).

> Existing Conditions Basic operation and commissioning of the SUP began during the Ameresco energy audit. During the course of the audit, Ameresco determined that the SUP would provide significant energy savings due to the following operating conditions:

• Displacement of Central Utility Plant secondary pumping by reduced demand SUP variable speed primary pumps

• Displacement of Central Utility Plant electric chiller operation by high efficiency SUP variable speed duplex chiller

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• Reduced electric chiller energy consumption during on-peak periods due to the addition of SUP ice storage capacity

Ameresco also observed an increase in monthly peak demand associated with the additional charging requirements of the ice storage system. The charging of this system, using the glycol chiller, increases overall campus peak demand, which typical occurs during the off-peak period. During the audit, the initiation and duration of ice and thermal storage charging was performed manually by facility staff. The staging is not yet optimized for overall campus peak electric load reduction.

Finally, Ameresco noted chilled water supply temperatures as low as 41ºF entering the campus’ secondary loop from both the SUP and CUP. Chilled water supply temperatures as low as 43ºF were observed entering air handling unit chilled water coils. These temperatures are well below the typical design entering water temperatures for cooling coils, and incur a significant efficiency penalty on primary cooling equipment. In addition, condenser water temperatures were observed to be 15ºF to 20ºF above the ambient wet-bulb temperature, which also decreases chiller efficiency. Recommended Modifications

Ameresco proposes the following modifications to current SUP and CUP operations. The proposed changes will maximize the energy savings associated with the commissioning of the SUP addition project:

Automatic staging of thermal and ice storage charging and discharging: Manual staging of thermal and ice storage charging and discharge should be avoided. In particular, manual staging of charging generally causes increased demand coincident with increasing building electrical loads (lights, fans, and other electrical components). Charging should be automatically timed, with limited override capability, such that all storage is fully charged by no later than 7am.

In addition, discharge of thermal and ice storage should be strictly limited to the period associated with the higher on-peak kWh charge. Conserving discharge reduces the time required to charge overnight and reduces to extension of the increased charging demand coincidence with increasing building loads.

Optimize secondary chilled water loop pumping via differential pressure reset: The SUP variable speed primary pumps were specified with sufficient pressure capacity to serve the entire campus’ secondary loop. The CUP chilled water piping manifold modifications also reduced the head required to provide loop flow from the CUP. Significant energy savings are available via dynamic reset of the loop head pressure setpoint based on flow demand as indicated by chilled water coil valves. It is recommended that loop pressure setpoints are reset in such a way that the chilled water coil valves in buildings with the high cooling loads are fully open. Building loop pressure setpoints would also be similarly reset. The SUP primary pumps and the CUP secondary pumps would modulate to maintain the loop pressure setpoints.

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Chilled water and condenser water temperature reset: As discussed above, chilled water supply temperatures are generally lower than design and condenser water temperatures are well above the design approach for the cooling towers. Significant energy savings are available from resetting both the chilled water and condenser water supply temperatures based on load and ambient conditions.

Chilled water reset would increase the chilled water supply temperature base either on outdoor air temperature, to maintain a chilled water return temperature setpoint, or a secondary loop temperature difference. Condenser water reset would decrease the condenser water supply temperature to maintain either a fixed approach to the ambient wet-bulb temperature or a fixed temperature across the condenser of the operational chiller(s). In both cases, limits on the reset ranges would be applied according to the chiller manufacturer’s recommendations, and in both cases the results would be increases in chiller efficiency at both full and part-loads.

Detailed Project Scope

The scope for this measure requires optimizing the plant sequences of operation as noted above. These sequence modifications would be developed with coordination with NMSU, GLHN, and Ameresco’s engineers.

Implementation of the revised sequences would be done by the controls subcontractor(s) and NMSU’s facilities personnel, in coordination with Ameresco’s engineers.

Functional performance tests of the optimized sequences would be designed by Ameresco for implementation by the controls subcontractor(s) with direction from Ameresco and NMSU facilities engineers.

Trend logs would be developed to monitor system performance on an on-going basis.

Energy Savings Proposed

Table D.10 summarizes the energy savings associated with this project.

Table. D.10. Energy Savings Associated with ECM 26

Annual Savings Units 2,126,102 kWh -449.6 kW 160 DTh, Natural Gas $368,553 Utility Cost Savings > Energy Ameresco calculated the energy savings for this measure using calibrated building models, a calibrated whole campus model, and a modified whole campus model incorporating the Satellite Utility Plant (SUP) addition. The inputs for the building and whole campus models were developed to match the existing building conditions, specifications, and operating parameters of the buildings and Central Utility Plant,

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concurrent with the time period associated with the utility baseline (September 2011 – August 2012). The baseline models’ energy consumption was calibrated using NMSU-provided building sub-meter and whole campus utility meter data for electricity, natural gas, chilled water, and steam utilities. Calibrations were made to the utility data according to IPMVP guidelines.

Parametric analysis was then performed on the models to capture the interactive effects of the proposed ECMs. The whole campus model was additionally modified to reflect the addition of the SUP and its incorporation into the chilled water system staging. Parametric analysis of this modified campus model captured the interactive effects of proposed ECMs on Satellite and Central Utility Plant chilled water production, steam production, and electric and natural gas utility consumption. The relative energy consumption of the modified campus model and the calibrated campus model, both with the proposed ECMs applied, represents the energy savings associated with this measure.

Detailed models and results are available electronically for review or on-going M&V purposes.

> Maintenance Maintenance procedures for the satellite plant would be those procedures included in the plant O&M manuals or the manufacturers’ recommend procedures for all major equipment. NMSU’s facilities staff would maintain a set of plant operation and maintenance logs for the purpose of monitoring and reporting of equipment utilization.

> Interactions There are multiple interactions between the SUP, CUP, chilled water distribution pumping systems, and campus buildings. These interactions are captured in the plant model and include their interactive effects.

References

GLHN chilled water system improvements – satellite plant building package

GLHN chilled water system improvements – site utility distribution package

Niagara system trend logs and system graphics

Plant and campus utility data

Assumptions

Assumptions made in the development of this proposal include:

The commissioning and turnover of the Satellite Utility Plant will be completed per the terms of the contract between the engineering firm of record, the general contractor, and NMSU. Responsibility of the completion and acceptance of any punch-list issues remain with the general contractor and NMSU.

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The energy savings associated with this measure assumes that the plant is maintained in working order, per the terms of any operations and maintenance documentation provided by the general contractor or warranty provided by the equipment manufacturers. Ameresco does not accept any responsibility for any warranty issues.

An additional project, which includes the replacement of the absorption chillers in operation during the baseline period, is not included in this measure. See Schedule B for a proposed correction to the baseline for this project

Utility Interruptions

There are no utility interruptions associated with this measure.

Other > Equipment Service Life The equipment service life for the major components includes:

Chillers – 20 years Controls and sensors – 15 years Hydronic equipment and devices – 15 years > Warranty This measure does not affect the warranty of any plant equipment.

> Interface with Existing Equipment The addition of the Satellite Utility Plant provides additional chilled water cooling capacity to the campus loop via a campus loop extension. This loop extension is part of a separate capital project, completed outside of this measure. The primary chilled water pumps included in the SUP are sized to provide the head and flow required to serve the existing campus chilled water loop. This will significantly reduce the run-hours of the Central Utility Plant primary and secondary pumps.

The staging of the existing central utility plant chillers is modified because of the SUP addition. The SUP duplex chiller now represents the first stage of electric chiller capacity, displacing the CUP electric chillers during periods when the total campus load is less than 4,000 tons during off peak periods. This will significantly reduce the run-hours of the CUP electric chillers and associated auxiliaries.

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ECMs 28, 29, & 30: MyEnergyPro™ Information System

General Description > ECM Summary In response to NMSU’s desire for a real-time energy information system, Ameresco proposes using the existing Tridium Building Automation System (BAS) and installing MyEnergyPro™ (MEP) to develop and customize a web application that will meet the unique requirements of the University. The three different websites that will be customized as part of this project are OpsPRO, UtilityPRO, and Optimization Model (OM).

> OpsPRO (ECM 28) MyEnergyPro™ OpsPRO is a secure, login essential, website that provides real-time energy usage for campus buildings, building equipment and central utility plant equipment. This application is used mainly by energy managers, facility managers, billing and accounting groups and administration. The main components and features of this site include:

• Campus map – with buildings’ current usage values, color coded to indicate difference from forecast; each user can custom define color range

• Current/historical graph – chart and tabular view of all building and equipment data points

• Multi-building/multi-year graph – up to five different data points for up to five different time periods graphed in one comparison chart; compare to baseline year data

• Building administration – add/modify buildings and meters

• User/role administration – add/modify users and roles

• Export to Excel - for all charts and reports

• Alarm module – email or text based on the difference between current and historical value. User can define the threshold, as well as, type of media (email or text)

• Reports– customized set of reports and charts

• Building Invoice – customized building monthly utility invoice calculation

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Role based access – program access defined by user role and responsibilities Monthly invoice input sheet – monthly recharge related values for building invoice module that require manual input > UtilityPRO (ECM 29) MyEnergyPro™ UtilityPRO is a monthly utility bill management tool accessed through a secure login required website. Clients can view their monthly utility bills including, but not limited to, electric, gas, water, and renewables, all in one simple chart. The monthly usage is compared with baseline usage, which can have weather normalization, facility changes, and set point adjustments. The key utility data can be displayed in a table report format and exported to Excel or an image file. With proper permissions, a client can also view the Measurement and Verification (M&V) Report, which shows the monthly savings, as well as, the guaranteed amount. The savings are displayed in both usage and dollars, and converted to pounds of CO2 for greenhouse gas impact. The Variance Report compares monthly usage, rate, and demand from year to year, and is color coded based on the difference. This gives the client the ability to easily identify potential errors in their bills.

A second (optional) component of UtilityPRO is the Controls Module, where close to real-time room-by- room setpoints, rooms, and exterior temperatures can be viewed. This provides a diagnostic tool to assist the client in the persistency of energy efficiency related to HVAC projects. Included in this module is a what-if analysis function where the client can use a slider on the screen to change the room set point and see the potential impact on the monthly bill instantaneously.

Additionally, UtilityPRO has built-in export modules customized for individual clients. Clients can download their billing data to financial software packages, in a format that can be automatically imported into those programs. UtilityPRO also has an Energy Star engine that is integrated with the Automated Benchmarking System to send utility data and receive Energy Star ratings. Energy Star ratings are then imported and displayed in the monthly charts.

UtilityPRO also links to a client’s other energy information sites, such as OpsPRO and DashPRO, if such sites exist. Clients can use UtilityPRO as a portal and one-stop shop for all their energy information needs. The following components are included in the UtilityPRO package:Monthly utility bill graph – graph monthly electricity bills compared to a pre-determine baseline and historical usage.

Monthly utility bill report – create report for monthly electricity bills compared to historical usage

Bill export – export bills to pre-defined formats that can be imported to PeopleSoft or other accounting systems

Benchmarking – upload to Energy Star through Automated Benchmarking System

Customer support – online customer support including support ticket management and document archive

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Controls Module – room-by-room setpoint monitoring and what-if scenario analysis > Optimization Model (ECM 30) The Optimization Model (OM) is an economic dispatch model where facility managers can find the most cost effective operation of a central plant or multi-interconnected central plants. This analytical tool takes in detailed, minute-by-minute consumption and production values for all major plant equipment and calculates the four most cost effective operating scenarios taking into account actual utility rates and identifies the production and cost of each piece of equipment on an hour-by-hour basis. Additionally, built into the OM is a modeling tool where users can change up to 30 variables and do what-if scenarios on the fly and save those scenarios for future reference.

• The main features of the optimization model are as follows:

• Economic dispatch of central plant equipment

• Real-time decision making

• Real-time consumption, production and rate info

• Large or multiple interconnected central plants

• Real-time efficiency equipment calculation

• Real-time costs of consumption and production calculation

• Development of four most economical operating scenarios

• What-if scenario analysis

• Comparison with previously saved historical ‘typical usage day’ energy consumption

• Data Acquisition – OpsPRO and O&M

Ameresco will use existing Tridium system to monitor thermal, gas, water, and electric energy usage in the facilities and parking lots. No additional meters are proposed for this measure. Where applicable, Tridium data will include:

• Electrical by kilowatt, kWh, power quality, and British thermal unit (Btu)

• Chilled water by temperatures, flows, tons, ton per hour, and Btu

• Hot water by temperature, flow, and Btu

• Steam by flow, pressure, temperature, and Btu

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• Natural gas meters to monitor the gas flow rate and volume by standard cubic feet per hour and total Btu

• Domestic water by flow and gallons

The central database will be a Microsoft SQL Server. The data from the SQL server will be made available to front-end (web application) using web service functions developed with ASP.NET. Ameresco will develop the main websites with Flex 4 architecture and deliver over the Internet via the Flash Player 10+ browser plug-in technology. Flash provides a rich user experience, similar to a desktop application profile. To simplify site maintenance, xml configuration files will be incorporated in the design wherever possible. For example, language for the informational page can be replaced without recompiling the site.

> Backend 1. Data Integration A critical part of the project is to create a reliable data import job. We will design an automated job to import real time energy data to the designated SQL Server database.

Data to be imported will include:

Buildings

- kW demand - Power quality - Chilled water - Hot water - Steam - MMBtu (where available) - Natural gas (where available) - Domestic water (where available) - Others to be defined 2. SQL Server Database Ameresco will design a SQL Server database to house real-time and historical data. The objects in the database will include:

Tables Stored procedures Functions

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We intend to store minute data only for a short period of time (e.g., 2 hours). Historical data will be stored in 15-minute intervals for an amount of time determined by NMSU. 3. Web Service Module Web service is used to pass data between the SQL server database and the front end Flex program. It includes functions that the Flex program calls to query the database. It is a separate module from the main website in terms of development and release and we will create web service:

Site to host web service functions in ASP.NET Functions to expose SQL stored procedures

Assumptions and Server Requirements

Data for the websites will reside in a SQL Server database, and collected through Tridium framework SQL Server database will be located at NMSU

- NMSU is to provide a stand-alone or shared server for MEP data

- The server should have Microsoft SQL Server 2008 full version installed Website will be hosted by NMSU

- NMSU is to provide a stand-alone designated webserver for MEP websites

- The server should have IIS 7 installed NMSU will provide unfettered access for the Ameresco team to both the SQL and web servers

Note: the above is based on preliminary discussions, subject to change after further evaluation of the system.

> Sample Server Specification The following provides a sample specification sheet for the stand-alone web server, using Dell server hardware. This system can be designated for NMSU MEP websites:

PowerEdge R210II SYSTEM COMPONENTS PowerEdge R210II PowerEdge R210II Chassis with Cabled 2x3.5 HDs and Quad-Pack LED Diagnostics, No Operating System Catalog Number: 8 RCRC1004559-3072699 ------Module Description

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PowerEdge R210 II PowerEdge R210II Chassis with Cabled 2x3.5 HDs and Quad-Pack LED Diagnostics Operating System No Operating System Ship Group Shipping Material, PowerEdge R210II Memory 8GB Memory (4x2GB), 1333MHz Single Ranked UDIMM Processor Intel® Xeon® E3-1270 3.40 GHz, 8M Cache, Turbo, Quad Core/8T (80W) Primary Hard Drive HD Multi-Select Internal Controller PERC H200 Adapter Internal RAID Controller for 3.5 HDDs Network Adapter On-Board Dual Gigabit Network Adapter Embedded Management iDRAC6 Enterprise Internal Optical Drive DVD-RW Drive, SATA Bezel Bezel System Doc Electronic System Documentation and Open Manage DVD Kit Hard Drive Add-in H200 (SAS/ SATA Controller), 2 Hard Drives - Configuration RAID 1 Rails 2-Post/4-Post 1U Static Rails, Short Hardware Support Services 3 Year ProSupport and NBD On-site Service Installation Services No Installation Proactive Maintenance Maintenance Declined Power Cords NEMA 5-15P to C13 Wall Plug, 125 Volt, 15 AMP, 10 Feet (3m), Power Cord Hard Drives (Multi-Select) (2) 1TB 7.2K RPM SATA 3.5in Cabled Hard Drive

References

Data obtained from facility:

Tridium data definition Utility bills General Data:

Field notes, controls points

Training, Warranty, License, and Support

After the initial installation of OpsPRO, the product will be under warranty for one year. During the warranty period, Ameresco will provide full support of the MEP program. Ameresco will also train NMSU employees/students on data validation functions and basic support items. After the initial first year, an annual license fee will apply.

The license fee is shown in the cash flow and covers:

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• Upgrades

• Email and phone support

• Remote support and maintenance of website

• Remote support and maintenance of SQL server

• Daily data quality report

Ameresco will include 48 hours of software development per year. This can be used toward adding new features or refining existing features, to make the OpsPRO ultimately more customized to the needs of NMSU.

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E.0 Project Costing

Ameresco provides open book pricing for the project developed in the final TEA. We will provide a breakdown of the material Ameresco purchases – the turnkey contractor costs, labor costs, and other miscellaneous costs for each measure.

The direct costs consist of our material purchases (e.g. lamps, ballasts, and other materials) and the labor costs for the installation. Ameresco has obtained bids for the material and labor portions of the work and used this information with our recommendation for the material and labor that represents the best value. If the recommendations do not represent the low bidder, Ameresco will provide a cost justification for the selections. Often times, in the energy conservation projects, the low bid does not translate into the best value, overall savings, or acceptable quality work. Ameresco will protect NMSU’s interest and make recommendations for vendors that offer the best overall value to NMSU.

NMSU directed Ameresco to include 11 ECMs in the project. Retrofits are required for seven of the ECMs. The remaining ECMs include the Satellite Plant Energy savings and MyEnergyPro™ measures. Cost breakdowns for the project are shown in Table ES.0, found in the Executive Summary and included again on the following page. The costs include Performance and Payment Bonds for 100 percent of the contract value. Please note that the Performance and Payment Bonds apply only to the installation portion of the contract and do not apply in any way to energy savings guarantees, payment, or maintenance provisions, except that the Performance and Payment Bond shall guarantee that the installation will be free of defective materials and workmanship for a period of 12 months following completion and acceptance of the work. These costs are also based on the assumption that mutually agreeable term and conditions are included in the contract. Pro Forma for the project selected is provided in the Executive Summary and Section A.0.

The Preliminary Construction Schedule for the project is provided on the following pages. Total construction time until project acceptance is estimated to be 18 months. The schedule also includes commissioning, final inspection, training, and documentations. The schedule tentatively assumed construction begins in April 2014.

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Table ES.0. Energy Conservation Measures Selected for Implementation – Firm Pricing

Savings ($) Total Implementation Natural Total Cost Simple Energy Conservation Measure Electric Gas O&M Project ($) Payback ECM 1: Interior Lighting $472,812 $4,119 $59,075 $536,006 $4,703,529 7.5

ECM 2: Exterior Lighting $10,143 $0 $4,123 $14,266 $294,934 19.0

ECM 3: Exterior Pole Mounted Lighting $4,795 $0 $888 $5,683 $1,336,816 233.2

ECM 6: Retro-commissioning $69,532 $71,698 $0 $141,230 $2,201,811 14.7

ECM 7: Variable Air Volume Retrofit $187,561 -$15,008 $0 $172,553 $3,469,299 18.2

ECM 10: Economizer Upgrade or Repair $96,642 -$284 $0 $96,358 $488,609 3.2

ECM 12: Chilled Water Pump Bypass $80,006 -$971 $0 $79,035 $1,429,554 16.5

ECM 26: Satellite Plant Energy Savings $367,551 $1,002 $0 $368,553 $0 0.0

ECM 28: MyEnergyPro™-OpsPRO $0 $0 $0 $0 $55,194

ECM 29: MyEnergyPro™-DashPRO $0 $0 $0 $0 $29,318

ECM 30: MyEnergyPro™-Optimization $0 $0 $0 $0 $122,834 Model Total $1,289,042 $60,556 $64,086 $1,413,684 $14,131,898 9.0

Note: The simple payback shown in the above table includes an estimated utility rebate of $1,459,216.

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Technical Energy Audit

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F. Draft Measurement and Verification Plan

The long-term success of any comprehensive energy efficiency program depends on the development of an accurate, successful Measurement and Verification (M&V) plan. The main objective is to develop a cost effective plan that quantifies and verifies the performance results of the ECMs. Ameresco applies industry standard M&V protocols that have been developed in response to the need for reliable and consistent measurement practices.

The following reference is used for the development of M&V procedures for this project:

• Efficiency Valuation Organization. International Performance Measurement & Verification Protocol (IPMVP). September 2010. • The protocols also help to allocate various risks associated with achieving energy cost savings and allowing risk reduction and better risk management. The M&V options description, provided herein, was developed by summarizing the IPMVP and contains excerpts taken from that document. The benefits of the protocols include:

− Defining the role of verification in energy contracts and implementation

− Discussing procedures, with varying levels of accuracy and cost, for verifying: . Baseline and project installation conditions and . Long-term energy savings performance.

− Providing techniques for calculating “whole-facility” savings, individual technology savings and stipulated savings

− Providing procedures that are consistent, industry accepted, impartial and reliable

− Providing procedures for the investigation and resolution of disagreements related to performance issues The general approach to determining energy savings in these plans involves comparing the energy use of the retrofitted system before installation of the ECM (baseline) and after installation of the ECM (post- retrofit). In general:

Energy Savings = Baseline Energy Use – Post-Retrofit Energy Use

The IPMVP protocols have defined four M&V options (Options A through D) that meet the needs of a wide range of performance contracts and provide suggested procedures for baseline development and

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post-retrofit verification. These M&V options are flexible and reflect the considerations previously mentioned. The options are summarized in Table F.0.

Table F.0. Measurement and Verification Options

M&V How Savings Are Typical Option Calculated Applications

Option A: Partially Measured Retrofit Isolation Savings are determined by partial field Engineering calculations using short- Lighting retrofit where power draw measurement of the energy use of the term or continuous post-retrofit is measured periodically. Operating system(s) to which an ECM was applied; measurements and stipulations. hours of the lights are stipulated. separate from the energy use of the rest of the facility. Measurements may be either short-term or continuous of the error they may introduce.

Partial measurement means that some but not all parameter(s) may be stipulated, if the total impact of possible stipulation error(s) is not significant to the resultant savings. Careful review of ECM design and installation will ensure that stipulated values fairly represent the probable actual value. Stipulations should be shown in the M&V Plan along with analysis of the significance of the error they may introduce. Option B: Retrofit Isolation Savings are determined by field Engineering calculations using short- Application of controls to vary the measurement of the energy use of the term or continuous measurements load on a constant speed pump systems to which the ECM was applied; using a variable speed drive. separate from the energy use of the rest Electricity use is measured by a kWh of the facility. Short-term or continuous meter installed on the electrical measurements are taken throughout the supply to the pump motor. In the post-retrofit period. base year, this meter is in place for a week to verify constant loading. The meter is in place throughout the post-retrofit period to track variations in energy use. Option C: Whole Facility (Bill Comparison) Savings are determined by measuring Analysis of whole facility utility meter or Multifaceted energy management energy use at the whole facility level. sub-meter data using techniques from program affecting many systems in a Short-term or continuous measurements simple comparison to regression building. Energy use is measured by are taken throughout the post-retrofit analysis. the gas and electric utility meters for period. a 12-month base year period and throughout the post-retrofit period.

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M&V How Savings Are Typical Option Calculated Applications

Option D: Calibrated Simulation (Calibrated Building Modeling) Savings are determined through Energy use simulation, calibrated with Multifaceted energy management simulation of the energy use of hourly or monthly utility billing data program affecting many systems in a components or the whole facility. and/or end-use metering. building, but where no base year Simulation routines must be data are available. Post-retrofit demonstrated to adequately model actual period energy use is measured by energy performance measured in the the gas and electric utility meters. facility. This option usually requires Base year energy use is determined considerable skill in calibrated simulation. by simulation using a model calibrated by the post-retrofit period utility data.

Table F.1 shows a summary of the proposed M&V plans for the project. Detailed description of the plan for each ECM subsequently follows. The results of the M&V services will be reported to NMSU on an annual basis. All specific protocols in the plans must be explained to and accepted by NMSU before construction on the project can begin. If NMSU does not agree with the protocols used to verify the savings, there is potential for significant disagreement once verification efforts begin.

Generally, the M&V approach utilized is Option A. For the ECMs that include modifications to the HVAC systems, the M&V approach utilizes calibrated baseline building and plant models compose in the course of the TEA to provide the baseline operating data. The buildings modeled in the course of the TEA will also be the buildings sampled via EMS trends during post-retrofit M&V. This will allow a valid performance comparison to be made with the baseline operating data available from the baseline models.

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Table F.1. Measurement and Verification Summary Matrix

ECM Description IPMVP Option Baseline M&V Requirements Post-Retrofit M&V Requirements Measurement and Metering Stipulated Variables Performance Period M&V Requiremen

ECM 1: Interior Lighting A Measurement of input power of select existing Measurement of input power of select new light Short-term metering of power consumption on Baseline and post-retrofit fixture power draw. Annual inspection on a percentage of retrof light fixtures. fixtures. select light fixtures. light fixtures. Baseline and post-retrofit fixture run hours. Measurement of run hours of select existing light Short-term metering of select fixtures run hours. fixtures. Number of selected fixtures must be statistically significant.

Included in ECM 1: Interior Lighting A Measurement of run hours of select light fixtures Measurement of run hours of select light fixtures Short-term metering of fixtures run hours with Baseline fixture power draws from ECM 1. Annual inspection on a percentage of retrof Controls without controls. with controls. and without controls. light controls. Baseline and post-retrofit fixture run hours. Number of selected fixtures must be statistically significant.

Included in ECM 1: Vending Machine A Measurement of baseline power measurement Measurement of vending machine run hours with Short-term metering of select vending machines Baseline and post-retrofit power consumption Annual inspection on vending miser operatio Controls of select vending machines. controls installed. power consumption. and run hours. Short-term metering of select vending machines run hours.

ECM 2: Exterior Lighting A Measurement of input power of select existing Measurement of input power of select new light Short-term metering of power consumption on Baseline and post-retrofit fixture power draw. Annual inspection on a percentage of retrof light fixtures. fixtures. select light fixtures. light fixtures. Baseline and post-retrofit fixture run hours. Measurement of run hours of select existing light Short-term metering of select fixtures run hours. fixtures. Number of selected fixtures must be statistically significant.

ECM 3: Exterior Pole Mounted Lighting A Measurement of input power of select existing Measurement of input power of select new light Short-term metering of power consumption on Baseline and post-retrofit fixture power draw. Annual inspection on a percentage of retrof light fixtures. fixtures. select light fixtures. light fixtures. Baseline and post-retrofit fixture run hours. Measurement of run hours of select existing light Short-term metering of select fixtures run hours. fixtures. Number of selected fixtures must be statistically significant.

ECM 6: Retro-commissioning A Document baseline operating parameters from EMS trending of economizer operating Configure EMS for 15-minute trending and Modeled baseline parameter values, and Annual sample inspection of modified calibrated baseline model based on rCx issues parameters. See detailed description for monthly archiving of selected equipment measure isolation parameters. See detailed components. Bin-analysis calculation of ene log. See detailed description for parameter list. parameter list. parameters. description for parameter list. savings. See detailed description for calcula procedure.

ECM 7: Variable Air Volume Retrofit A Document baseline AHU operating parameters EMS trending of AHU operating parameters. See Configure EMS for 15-minute trending and Modeled baseline parameter values, and Annual sample inspection of modified from calibrated baseline model. See detailed detailed description for parameter list. monthly archiving of selected equipment measure isolation parameters. See detailed components. Bin-analysis calculation of ene description for parameter list. parameters. description for parameter list. savings. See detailed description for calcula

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ECM Description IPMVP Option Baseline M&V Requirements Post-Retrofit M&V Requirements Measurement and Metering Stipulated Variables Performance Period M&V Requiremen procedure.

ECM 10: Economizer Upgrade or Repair A Document baseline economizer operating EMS trending of economizer operating Configure EMS for 15-minute trending and Modeled baseline parameter values, and Annual sample inspection of modified parameters from calibrated baseline model. See parameters. See detailed description for monthly archiving of selected equipment measure isolation parameters. See detailed components. Bin-analysis calculation of ene detailed description for parameter list. parameter list. parameters. description for parameter list. savings. See detailed description for calcula procedure.

ECM 12: Chilled Water Pump Bypass A Document baseline AHU chilled water coil and EMS trending of AHU chilled water coil and Configure EMS for 15-minute trending and Modeled baseline parameter values, and Annual sample inspection of modified chilled water pump operating parameters from chilled water pump operating parameters. See monthly archiving of selected equipment measure isolation parameters. See detailed components. Bin-analysis calculation of ene calibrated baseline model. See detailed detailed description for parameter list. parameters. description for parameter list. savings. See detailed description for calcula description for parameter list. procedure.

ECM 26: Satellite Plant Energy Savings A Document baseline central utility plant operating EMS trending of central and satellite utility plant Configure EMS for 15-minute trending and Modeled baseline parameter values, and Annual sample inspection of modified parameters from calibrated baseline model. See operating parameters. See detailed description monthly archiving of selected equipment measure isolation parameters. See detailed components. Compile and calculate total detailed description for parameter list. for parameter list. parameters. description for parameter list. monthly energy consumption for central and satellite utility plants. See detailed descripti for calculation procedure.

ECM 28: My Energy Pro – Ops PRO N/A None. There are no savings associated with this None. None. None. None. measure.

ECM 29: Mt Energy PRO – Optimization N/A None. There are no savings associated with this None. None. None. None. Model measure.

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ECM 1: Interior Lighting

The M&V protocol for this measure is based on IPMVP Option A. Option A includes engineering calculations with one-time representative measured values, resulting in measured verification of performance. With the chosen method, hours of operation are agreed to. Post installation fixture wattages will be determined from one-time after spot measurements of representative fixture types.

Under this measurement plan, Ameresco assumes performance risk for the operation of the new fixtures. We will perform equipment measurements to verify that the performance of the installed equipment will operate at the levels defined in the TEA (power output at stated conditions). This will be established by measuring a percentage of fixtures (either individual fixtures or on a given lighting circuit) of the same lamp/ballast combination as defined in the project specific M&V Plan as shown in the technical appendix. If the lighting systems do not perform as proposed, Ameresco will either change the systems or compensate the customer. For the site operating hours, Ameresco has no control over the hours of operation of the facility and cannot be reasonably requested to assume the risk for this variable. Therefore, the customer and Ameresco will agree to the run hours for the life of the contract as shown for the existing and proposed hour codes identified in the Lighting Usage Assumptions for NMSU provided in the technical appendix.

Cooling savings and heating penalty from lighting retrofit will be verified through the lamp/ballast electricity reduction. Ventilation rate, cooling/heating period, and cooling/heating equipment efficiencies will be stipulated based upon the plant eQUEST model’s results.

Energy Savings Calculation Methodology > Savings Algorithm Savings = LightingSavings − Heat + Cool

LightingSavings = DemandSavings + EnergySavings

DemandSavings = BaselineDemand − PostDemand

EnergySavings = BaselineEnergy − PostEnergy

BaselineDemand = kW × Months × $ ∑ ∑ ( Base kW ) buildings fixtures

PostDemand = kW × Months × $ ∑ ∑ ( retro kW ) buildings fixtures

BaselineEnergy = kW × Hrs × $ ∑ ∑ ( Base Base kWh) buildings fixtures

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PostEnergy = kW × Hrs + $ ∑ ∑ ( Re tro Base kWh) buildings fixtures

Where:

kWBase = Baseline fixture kW

kWRetro = Post-retrofit fixture kW

Hrs = Baseline fixture operating hours $/kW = Unit cost of electric demand, per baseline $/kWh = Unit cost of electric energy, per baseline > Metering Plan

As part of the monitoring services under this agreement, Ameresco will measure the post-installation fixture input power for 10 percent of the representative fixtures at the time of commissioning and if the total sample values result in savings within 10 percent of the TEA savings, no change will be made. If the total sample values are not within 10 percent, Ameresco will either take corrective action for them to be within this limit or will use the measured values.

As part of the monitoring services, Ameresco will perform a yearly site inspection of ECM 1. The observations during this inspection will be made part of the Annual Reconciliation Report. No long-term monitoring or inspections are included as part of ECM 1.

Interior Lighting Controls

Interior lighting controls are included within the ECM1 scope. The M&V protocol for interior lighting controls is based on the recommendations of IPMVP Option A. Option A includes engineering calculations with one-time representative measured values, resulting in measured verification of performance. Under this M&V plan, fixture wattages will be determined from one-time spot measurements from ECM 1. Baseline run hours of the fixtures will be stipulated, but post-retrofit run hours will be verified with short-term logging. There will be no demand savings for interior lighting controls.

Cooling savings and heating penalty from lighting retrofit will be verified through the kWh electricity reduction also. As in ECM 1, ventilation rate, cooling/heating period, and cooling/heating equipment efficiencies will be stipulated.

Energy Savings Calculation Methodology > Savings Algorithm = − + Savings EnergySavings Heat Cool EnergySavings = BaselineEnergy − PostEnergy

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BaselineEnergy = kW × Hrs × $ ∑ ∑ ( Re tro Base kWh) buildings fixtures

PostEnergy = kW × Hrs + $ ∑ ∑ ( Re tro Re tro kWh) buildings fixtures

Where:

kWBase = Baseline fixture kW kWRetro = Post-retrofit fixture kW HrsBase = Baseline fixture operating hours HrsRetro = Post-retrofit fixture operating hours $/kW = Unit cost of electric demand, per baseline $/kWh = Unit cost of electric energy, per baseline > Metering Plan Power consumption measurements of the fixtures are covered under ECM 1. The fixtures wattage used will be the wattage after lamp/ballast retrofit to avoid double counting. Fixtures run hours after lighting controls installation will be trended with short-term loggers.

Vending Machine Controls

Vending machine controls are included within the ECM 1 scope. The M&V protocol for this measure is based on IPMVP Option A. For Option A, electric power draw of the vending machines will be measured for the select types of machines, and this kW draw is stipulated to be the same before and after controller installation. Run hours of the machines will be measured with short-term metering for both before and after retrofit. These measured run hours are then used in the calculation to verify the energy savings. There are no peak demand savings for ECM 1.

Energy Savings Calculation Methodology > Savings Algorithm EnergySavings = BaselineEnergy − PostEnergy

BaselineEnergy = (kW × Hrs )× $ ∑ Base kWh Machines

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PostEnergy = (kW × Hrs )× $ ∑ Post kWh Machines

Where: kW = Vending machine kW HrsBase = Base operating hours HrsPost = Post-retrofit operating hours $/kWh = Unit cost of electrical energy per baseline > Metering Plan Ameresco will log the average power consumption of a sample of units. The baseline and post- installation run hours will be determine by short-term metering. As part of the monitoring services under this agreement, Ameresco will perform a yearly site inspection of the vending machine controls. The observations during this inspection will be made part of the Annual Reconciliation Report.

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ECMs 2 and 3: Exterior Lighting and Exterior Pole Mounted Lighting

The M&V protocol for these measures is based on IPMVP Option A. Option A includes engineering calculations with one-time representative measured values, resulting in measured verification of performance. With the chosen method, hours of operation are agreed to. Post installation fixture wattages will be determined from one-time after spot measurements of representative fixture types.

Energy Savings Calculation Methodology > Savings Algorithm Savings = LightingSavings − Heat + Cool

LightingSavings = DemandSavings + EnergySavings

DemandSavings = BaselineDemand − PostDemand

EnergySavings = BaselineEnergy − PostEnergy

BaselineDemand = kW × Months × $ ∑ ∑ ( Base kW ) buildings fixtures

PostDemand = kW × Months × $ ∑ ∑ ( retro kW ) buildings fixtures

BaselineEnergy = kW ×Hrs × $ ∑ ∑( Base Base kWh) buildings fixtures

PostEnergy = kW × Hrs + $ ∑ ∑ ( Re tro Base kWh) buildings fixtures

Where:

kWBase = Baseline fixture kW

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kWRetro = Post-retrofit fixture kW

Hrs = Baseline fixture operating hours $/kW = Unit cost of electric demand, per baseline $/kWh = Unit cost of electric energy, per baseline > Metering Plan

As part of the monitoring services, Ameresco will perform yearly site inspections of ECMs 2 and 3. The observations during this inspection will be made part of the Annual Reconciliation Report. No long-term monitoring or inspections are included as part of ECMs 2 and 3.

Exterior Lighting Controls

Exterior Lighting Controls are included within specified fixtures in the ECM 2 and ECM 3 scope. The M&V protocol for exterior lighting controls is based on the recommendations of IPMVP Option A. Option A includes engineering calculations with one-time representative measured values, resulting in measured verification of performance. Under this M&V plan; fixture wattages will be determined from one-time spot measurements from ECMs 2 and 3. Baseline run hours of the fixtures will be stipulated, but post-retrofit run hours will be verified with short-term logging. There will be no demand savings for interior lighting controls.

Energy Savings Calculation Methodology > Savings Algorithm = − + Savings EnergySavings Heat Cool EnergySavings = BaselineEnergy −PostEnergy

BaselineEnergy = kW × Hrs × $ ∑ ∑ ( Re tro Base kWh) buildings fixtures

PostEnergy = kW × Hrs + $ ∑ ∑ ( Re tro Re tro kWh) buildings fixtures

Where:

kWBase = Baseline fixture kW kWRetro = Post-retrofit fixture kW

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HrsBase = Baseline fixture operating hours HrsRetro = Post-retrofit fixture operating hours $/kW = Unit cost of electric demand, per baseline $/kWh = Unit cost of electric energy, per baseline > Metering Plan Power consumption measurements of the fixtures are covered under ECMs 2 and 3. The fixtures wattage used will be the wattage after lamp/ballast retrofit to avoid double counting. Fixtures run hours after lighting controls installation will be trended with short-term loggers.

As part of the monitoring services, Ameresco will perform a yearly site inspection of ECM 2 and 3. The observations during this inspection will be made part of the Annual Reconciliation Report. No long-term monitoring or inspections are included as part of ECMs 2 and 3.

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ECM 6: Retro-Commissioning

The M&V protocol for this measure is based on IPMVP Option A. Option A includes engineering calculations of energy consumption of modified systems based on both measurement and stipulation of system input variables. Stipulated input variables are chosen to account and correct for interaction with concurrent implemented measures.

Under this measurement plan, Ameresco assumes performance risk for modified system components and their associated sequences of operation. Ameresco will perform equipment measurements and implement energy management system trends to verify that the performance of the installed equipment will operate according to the Schedule R measure descriptions.

For water and air temperature related rCx issues, heat transfer savings at the heating and cooling coils will be calculated based on the measured and stipulated values. Chilled water and steam input will be converted into central plant electric and natural gas energy consumption using stipulated conversion indices. The calculated energy savings will be normalized to account for weather variations between the weather file used for the stipulated baseline consumption and weather concurrent to the evaluation period.

For fan and pump related rCx issues, electric energy consumption and demand savings will be based on pre and post measured or trended power consumption, and measured and/or stipulated operating hours.

Energy Savings Calculation Methodology The exact scope of the retro-commissioning measure will be determined by the rCx process undertaken during measure implementation. The specific calculation methodology will be determined once the scope of the rCx issues have been determined. Below is a sample calculation for how the energy savings for potential rCx measures will be measured and verified

> Pre-Retrofit Parameters RCx Issue: Leaking Steam Coil Valve

All pre-retrofit baseline performance parameters are defined by a calibrated building energy simulation model composed during the course of the TEA. Output parameters from the model used to define the baseline performance for this measure include the following:

A. Hourly cold deck airflow fraction of total airflow (CFM)

B. Hourly hot deck airflow fraction of total airflow (CFM)

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C. Hourly mixed air Temperature

D. Hourly outdoor air temperature

E. Hourly hot deck discharge air temperature

F. Hourly cold deck discharge air temperature

G. Hourly chilled water pump electric energy demand

Parameters A, B, and C will be further defined as functions of parameter D (i.e. f(OAT) = hot deck airflow fraction) for use in bin analysis of pre-retrofit heating and cooling coil performance.

Parameter G will be further defined as a function of parameter F for use in bin analysis of pre- retrofit chilled water pump energy consumption.

The following parameter will be spot measured pre-retrofit:

H. Total system airflow

> Post-Retrofit Parameters

Post-retrofit coil performance parameters are defined by EMS trend data (15-minute interval):

D. Outdoor air temperature

E. Hot deck discharge air temperature

F. Cold deck discharge air temperature

Parameters E and F will be also be defined as a function of parameter D for use in bin analysis of post- retrofit heating and cooling coil performance.

In order to account for interactions with other implemented measures, post-retrofit values for parameters A, B, C, D, and G are stipulated to be equal to pre-retrofit values.

> Utility Consumption Indices

Utility consumption indices will be used to convert heating and cooling energy consumption at the cooling coil to electric and natural gas energy consumption at the central plant. The utility savings indices are based on the results of the calibrated whole campus energy simulation model. For this measure, these values are stipulated in Table F.2.

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Table F.2. Utility Consumption Indices

Off-Peak On-Peak Electric HP+LP NATURAL Electric Electric Demand kW GAS dekatherms Energy kWh Energy kWh

Parameter Mark I J K L

M Cooling Energy (Ton- hours) 0.000411 0.10294 0.001383

N Heating Energy (klbstm) 0.604331

> Savings Analysis

The energy savings will be calculated using a modified bin analysis method. Weather bins based on the base model weather file, with a maximum of three degree weather bins will be compiled. The weather bins will be segregated into on-and off -peak hours. For both the pre and post conditions, the base model weather bins will be used in order to normalize the energy savings calculations relative to weather.

For each weather bin, sensible energy consumption, and chilled water pump energy consumption will be calculated on a pre and post basis using the following equations

Heating (kblstm) N = (0.98 x (H x (B)) x (C – (E))) / (881,000)

Cooling (tons) M = (0.98 x (H x (A)) x (C – (F))) / (12,000)

Chilled water pump (kW) = G

The inputs for parameter C will be the result of the f(D) function for mixed air temperature unique to the pre and post cases.

The input for parameter G will be the result of the f(F) function for chilled water pump demand for the pre-retrofit case, where F is the cold deck supply temperature for the post-retrofit case.

The total energy consumption for the pre and post case will be the following:

O. Electric energy demand (kW): (M x I) + max(G)

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P. Off-peak electric energy (kWh): (M x J) + (G x off-peak bin hours)

Q. On-peak electric energy (kWh): (M x K) + (G x on-peak bin hours)

R. Natural gas (dekatherms): N x L

The energy savings will be the difference between parameters O thru R for the pre and post cases.

> Metering Plan As part of the monitoring services under this agreement, Ameresco will require continuing access to NMSU’s energy management system for the purpose of initiating and intermittent download of data trends for the post-retrofit parameters defined above. NMSU will be required to maintain the trends established by Ameresco for the purposes of measurement and verification. Additional associated parameters, not used in the measured savings calculation, may also be trended for diagnostic purposes. Ameresco will periodically download and archive the data off-site throughout the evaluation period, defined for this measure as four months from August 1 through November 30 of each evaluation year.

NMSU will be required to maintain the trends established by Ameresco for the purposes of measurement and verification. In addition, NMSU will be required to notify Ameresco of any prolonged EMS outages that may result in trend data loss.

As part of the monitoring services, Ameresco will perform a yearly site inspection of this ECM. The observations during this inspection will be made part of the Annual Reconciliation Report.

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ECM 7: Variable Air Volume Retrofit

For chilled water and steam savings, heat transfer savings at the heating and cooling coils will be calculated based on the measured and stipulated values. Chilled water and steam input will be converted into central plant electric and natural gas energy consumption using stipulated conversion indices. The calculated energy savings will be normalized to account for weather variations between the weather file used for the stipulated baseline consumption and weather concurrent to the evaluation period.

For fan and pump related energy savings, electric energy consumption and demand savings will be based on pre and post measured or trended power consumption, and measured and/or stipulated operating hours.

Energy Savings Calculation Methodology > Pre-Retrofit Parameters

A. Hourly cold deck airflow fraction of total airflow (CFM)

B. Hourly hot deck airflow fraction of total airflow (CFM)

C. Hourly mixed air temperature

D. Hourly outdoor air temperature

E. Hourly hot deck discharge air temperature

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F. Hourly cold deck discharge air temperature

G. Hourly total system airflow

H. Hourly fan power

I. Hourly chilled water pump electric energy demand

Parameter H will be further defined as the sum of air handling unit supply, and return/relief fans.

Parameters A, B, G, H and I will be further defined as functions of parameter D (i.e. f(OAT) = hot deck airflow fraction) for use in bin analysis.

Parameter I will be further defined as a function of parameter F for use in bin analysis of the chilled water pump energy consumption.

> Post-Retrofit Parameters

Post-retrofit performance parameters are defined by EMS trend data (15-minute interval):

A. Cold deck airflow fraction of total airflow (CFM)

B. Hot deck airflow fraction of total airflow (CFM)

D. Outdoor air temperature

E. Hourly hot deck discharge air temperature

F. Hourly cold deck discharge air temperature

G. Hourly total system airflow

H. Hourly fan power

I. Hourly chilled water pump electric energy demand

Parameters A and B will be further defined as the average of a sample of terminal units

Parameters A, B, E, F, and G will be also be defined as a function of parameter D for use in bin analysis.

Parameter H will be further defined as the sum of air handling unit supply, and return/relief fans.

Parameter H will also be defined as a function of parameter G for use in bin analysis

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Parameter I will be further defined as a function of parameter F for use in bin analysis chilled water pump energy consumption.

In order to account for interactions with other implemented measures, post-retrofit values for parameters C are stipulated to be equal to pre-retrofit values.

> Utility Consumption Indices

Table F.3. Utility Consumption Indices Off-Peak On-Peak Electric HP+LP NATURAL Electric Electric Demand kW GAS dekatherms Energy kWh Energy kWh

Parameter Mark J K L M

N Cooling Energy (Ton- hours) 0.001055 0.538715 0.093226

O Heating Energy (klbstm) -0.21548

> Savings Analysis

The energy savings will be calculated using a modified bin analysis method. Weather bins based on the base model weather file, with a maximum of three degree weather bins will be compiled. The weather bins will be segregated into on-and off-peak hours. For both the pre and post conditions, the base model weather bins will be used in order to normalize the energy savings calculations relative to weather.

For each weather bin, sensible energy consumption, chilled water pump energy consumption, and fan energy consumption will be calculated on a pre and post basis using the following equations:

Heating (kblstm) O: = (0.98 x (G x (B)) x (C – (E))) / (881,000)

Cooling (tons) N: = (0.98 x (G x (A)) x (C – (F))) / (12,000)

Fan power (kW) = H

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Chilled water pump (kW) = I

The inputs for parameter C will be the result of the f(D) function for mixed air temperature for the pre- retrofit case.

The inputs for parameters A, B, E, and F will be the result of f(D) functions unique to the pre and post- retrofit cases.

The input for parameter I will be the result of the f(F) functions for chilled water pump demand unique to the pre and post-retrofit cases.

The inputs for parameter H will be the result of the f(G) function for mixed air temperature for the pre- retrofit case.

The total energy consumption for the pre and post cases will be the following:

S. Electric energy demand (kW): (N x J) + max(H+I)

T. Off-peak electric energy (kWh): (N x K) + ((H+I) x off-peak bin hours)

U. On-peak electric energy (kWh): (N x L) + ((H+I) x on-peak bin hours)

V. Natural gas (dekatherms): (O x M)

The energy savings will be the difference between parameters S thru V for the pre and post cases.

> Metering Plan

As part of the monitoring services under this agreement, Ameresco will require continuing access to NMSU’s energy management system for the purpose of initiating and intermittent download of data trends for the post-retrofit parameters defined above. NMSU will be required to maintain the trends established by Ameresco for the purposes of measurement and verification. Additional associated parameters, not used in the measured savings calculation, may also be trended for diagnostic purposes. Ameresco will periodically download and archive the data off-site throughout the evaluation period, defined for this measure as four months from August 1 through November 30 of each evaluation year.

As part of the monitoring services, Ameresco will perform a yearly site inspection of this ECM. The observations during this inspection will be made part of the Annual Reconciliation Report.

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ECM 10: Economizer Upgrade and Repair

Under this measurement plan, Ameresco assumes performance risk for modified economizer components and the associate sequence of operation. Ameresco will perform equipment measurements and implement energy management system trends to verify that the performance of the installed equipment will operate according to the Schedule R measure descriptions. Heat transfer saving at the heating and cooling coils will be calculated based on the measured and stipulate values. Chilled water and steam input will be converted into central plant electric and natural gas energy consumption using stipulated conversion indices. The calculated energy savings will be normalized to account for weather variations between the weather file used for the stipulated baseline consumption and weather concurrent to the evaluation period.

Energy Savings Calculation Methodology > Pre-Retrofit Parameters

All pre-retrofit baseline economizer performance parameters are defined by a calibrated building energy simulation model composed during the course of the TEA. Output parameters from the model used to define the baseline performance for this measure include the following:

A. Hourly cold deck airflow fraction of total airflow (CFM)

B. Hot deck airflow fraction of total airflow (CFM)

C. Hourly mixed air temperature

D. Hourly outdoor air temperature

E. Average hot deck discharge air temperature (average of hourly data)

F. Average cold deck discharge air temperature (average of hourly data)

Parameters A, B, and C will be further defined as functions of parameter D (i.e. f(OAT) = hot deck airflow fraction) for use in bin analysis of pre-retrofit economizer performance.

The following parameter will be spot measured pre-retrofit:

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G. Total system airflow

> Post-Retrofit Parameters

Post-retrofit economizer performance parameters are defined by EMS trend data (15-minute interval):

C. Mixed air temperature

D. Outdoor air temperature

Parameter C will be further defined as a function of parameter D for use in bin analysis of post-retrofit economizer performance.

In order to account for interactions with other implemented measures, post-retrofit values for parameters A, B, D, E, and F are stipulated to be equal to pre-retrofit values.

> Utility Consumption Indices

Utility consumption indices will be used to convert heating and cooling energy consumption at the cooling coil to electric and natural gas energy consumption at the central plant. The utility savings indices are based on the results of the calibrated plant energy simulation model. For this measure, these values are stipulated in Table F-3.

Table F.4. Utility Consumption Indices Off-Peak On-Peak Electric HP+LP NATURAL Electric Electric Demand kW GAS dekatherms Energy kWh Energy kWh

Parameter Mark I J K L

M Cooling Energy (Ton- hours) 0.001082 1.385394 .005568

N Heating Energy (klbstm) 0.005143

> Savings Analysis

The energy savings will be calculated using a modified bin analysis method. Weather bins based on the base model weather file, with a maximum of three degree weather bins will be compiled. The weather bins will be segregated into on- and off-peak hours. For both the pre and post conditions, the base model weather bins will be used in order to normalize the energy savings calculations relative to weather.

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For each weather bin, heating and cooling coil sensible energy consumption will be calculated on a pre and post basis using the following equation:

Cooling (tons) M: = (0.98 x (G x (A or B)) x (C – (E or F))) / (12,000)

Heating (kblstm) N: = (0.98 x (G x (A or B)) x (C – (E or F))) / (881,000)

The inputs for parameter C will be the result of the f(D) function for mixed air temperature unique to the pre and post cases.

The total energy consumption for the pre and post case will be the following:

O. Electric energy demand (kW): (M x bin hours) x I

P. Off-peak electric energy (kWh): (M x bin hours x J)

Q. On-peak electric energy (kWh): (M x bin hours x K)

R. Natural gas (dekatherms): N x bin hours x L

The energy savings will be the difference between parameters O thru R for the pre and post cases.

> Metering Plan

As part of the monitoring services, Ameresco will perform a yearly site inspection of this ECM. The observations during this inspection will be made part of the Annual Reconciliation Report.

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ECM 12: Chilled Water Bypass

Energy Savings Calculation Methodology > Pre-Retrofit Parameters

A. Hourly cold deck airflow fraction of total airflow (CFM)

B. Hourly mixed air temperature

C. Hourly outdoor air temperature

D. Hourly cold deck discharge air temperature

E. Hourly total system airflow

F. Hourly chilled water pump electric energy demand

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Parameters A, B, D, and E will be further defined as functions of parameter C (i.e. f(OAT) = cold deck airflow fraction) for use in bin analysis.

Parameter F will be further defined as a function of parameter D for use in bin analysis of the chilled water pump energy consumption.

> Post-Retrofit Parameters

Post-retrofit performance parameters are defined by EMS trend data (15-minute interval):

A. Cold deck airflow fraction of total airflow (CFM)

C. Outdoor air temperature

D. Cold deck discharge air temperature

E. Total system airflow

F. Chilled water pump electric energy demand

Parameter A will be further defined as the average of a sample of terminal units

Parameters A, D, E, and F will be also be defined as a function of parameter C for use in bin analysis.

In order to account for interactions with other implemented measures, post-retrofit values for parameter B are stipulated to be equal to pre-retrofit values.

> Utility Consumption Indices

Utility Consumption indices will be used to convert heating and cooling energy consumption at the cooling coil to electric and natural gas energy consumption at the central plant. The utility savings indices are based on the results of the calibrated whole campus energy simulation model. For this measure, these values are stipulated in Table F.5.

Table F.5. Utility Consumption Indices Electric Off-Peak On-Peak HP+LP NATURAL Demand Electric Electric GAS dekatherms kW Energy kWh Energy kWh

Parameter Mark J K L M

N Cooling Energy (Ton- - hours) 0.00097 2.01641 0.168018 -0.0089

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> Savings Analysis

The energy savings will be calculated using a modified bin analysis method. Weather bins based on the base model weather file, with a maximum of three degree weather bins will be compiled. The weather bins will be segregated into on- and off-peak hours. For both the pre and post conditions, the base model weather bins will be used in order to normalize the energy savings calculations relative to weather.

For each weather bin, sensible energy consumption, chilled water pump energy consumption, and fan energy consumption will be calculated on a pre and post basis using the following equations:

Cooling (tons) N: = (0.98 x (E x (A)) x (B – (D))) / (12,000)

Chilled water pump (kW) = F

The inputs for parameter B will be the result of the f(C) function for mixed air temperature for the pre- retrofit case.

The inputs for parameters A, D, E, and F will be the result of f(C) functions unique to the pre and post- retrofit cases.

The total energy consumption for the pre and post cases will be the following:

S. Electric Energy Demand (kW): (N x J) + max(F)

T. Off Peak Electric Energy (kWh): (N x K) + ( F x off peak bin hours)

U. On Peak Electric Energy (kWh): (N x L) + ( F x on peak bin hours)

V. Natural Gas (dekatherms): (N x M)

The energy savings will be the difference between parameters S thru V for the pre and post cases.

Metering Plan As part of the monitoring services under this agreement, Ameresco will require continuing access to NMSU’s energy management system for the purpose of initiating and intermittent download of data trends for the post-retrofit parameters defined above. NMSU will be required to maintain the trends established by Ameresco for the purposes of measurement and verification. Additional associated parameters, not used in the measured savings calculation, may also be trended for diagnostic purposes. Ameresco will periodically download and archive the data off-site throughout the evaluation period, defined for this measure as four months from August 1 through November 30 of each evaluation year.

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As part of the monitoring services, Ameresco will perform a yearly site inspection of this ECM. The observations during this inspection will be made part of the Annual Reconciliation Report.

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ECM 26: Satellite Plant Energy Savings

Under this measurement plan, Ameresco assumes performance risk of the energy performance aspects of the satellite plant operation. Ameresco will perform equipment measurements and implement energy management system trends to verify that the performance of the installed equipment will operate according to the Schedule R measure descriptions. Electric and natural gas energy consumption savings will be calculated as the difference between stipulated pre-retrofit values, and the post-retrofit measured and monitored values. The calculated energy savings will be normalized to account for weather variations between the weather file used for the stipulated baseline consumption and weather concurrent to the evaluation period.

Energy Savings Calculation Methodology

Pre-Retrofit Parameters The pre-retrofit baseline is defined by the calibrated campus energy simulation mode composed during the course of the TEA. This model includes the central utility plant as configured during the baseline period (September 2011 – August 2012). Hourly data output parameters from the model used to define the baseline performance for this measure include those shown in Table F.6.

Table F.6. ECM 26 Pre-Retrofit Model Hourly Data Parameters– Central Utility Plant Central Utility Plant

Plant Component Electric Energy Demand (kW)

Primary Chilled Water Pumps

CHWP1 A

CHWP2 B

CHWP3 C

Chlr2a (2(2StageAbs) Pump D

Secondary Chilled Water Pumps

CHW Loop Pump E

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Central Utility Plant

Plant Component Electric Energy Demand (kW)

Condenser Water Pumps

CWP1 F

CWP2 G

CWP3 H

ACWP3 I

ACWP4 J

Electric Chillers

CUP CH1 K

CUP CH2 L

CUP CH3 M

Absorption Chillers

Chiller2a (2 StageAbs) N

Chiller2b (2StageAbs) O

Cooling Towers

CT1 P

CT2 Q

CT3 R

Plant Component Secondary Loop Cooling Load (Ton-hours)

Secondary CHW Loop S

The hourly data output for these parameters will be compiled into monthly electric off-peak/on-peak energy consumption and peak demand. The secondary chilled water loop data will be reserved for correcting the post-retrofit data to account for interactive affects with other implemented energy conservation measures.

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> Post-Retrofit Parameters

Post-retrofit central and satellite plant consumption are defined by EMS trend data (15-minute interval) parameters shown in Tables F.7 and F.8.

Table F.7. ECM 26 Post-Retrofit EMS Trend Parameters – Central Utility Plant Central Utility Plant

Plant Component Electric Energy Demand (kW)Parameter

Primary Pumps

CHWP1 A

CHWP2 B

CHWP3 C

Steam CHWP4 T

Thermal Storage Charging Pumps

Chrg-1 U

Chrg-2 V

Secondary Chilled water Pumps

CHW Loop Pump E

Condenser Water Pumps

CWP1 F

CWP2 G

CWP3 H

Steam CWP4 W

Electric Chillers

CUP CH1 K

CUP CH2 L

CUP CH3 M

Steam Turbine Chiller

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Central Utility Plant

Plant Component Electric Energy Demand (kW)Parameter

Steam Chiller-4 X

Cooling Tower Fans

CT1 P

CT2 Q

CT3 R

Steam CT4 Y

Plant Component Secondary Loop Cooling Load

Secondary CHW Loop Load

CUP_Campus_Flow_Total (GPM) Z

CUP_CHWS_Temeprature (deg F) AA

CUP_CHWR_Temperature (deg F) BB

Steam Chiller Load (Ton-Hrs) CC

Table F.8 ECM 26 Post-Retrofit EMS Trend Parameters – Satellite Utility Plant Satellite Utility Plant

Plant Component Electric Energy Demand (kW)Parameter

Primary Pumps

CHWP 11 DD

CHWP 12 EE

CHWP 13 FF

Ice Storage Glycol Pump

GLYP-1 GG

GLYP-2 HH

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Satellite Utility Plant

Plant Component Electric Energy Demand (kW)Parameter

Condenser Water Pumps

SPCWP1 II

SPCWP2 JJ

SPCWP3 KK

Electric Chillers

Duplex Chiller 6 LL

Glycol Chiller MM

Cooling Tower Fans

SPCT1 NN

SPCT2 OO

SPCT3 PP

Plant Component Satellite Plant Secondary Loop Load

Satellite Plant Secondary CHW Loop Flow (GPM) QQ

Satellite Plant Loop CHWS (deg F) RR

Satellite Plant CHWR (deg F) SS

The interval data points for electric demand in Tables F.7 and F.8 will be compiled into monthly total coincident electric energy peak demand and off-peak/on-peak consumption for the evaluation period defined for this measure as four months from August 1 through November 30 of each evaluation year.

The total electric energy consumption and demand will be further defined as a function of total secondary loop loads as calculated from parameters Z, AA, BB, CC, QQ, RR, SS. The load calculations are as follows:

Post -retrofit Central Utility Plant chilled water load ZZ: = sum ((500 x Z x (BB - AA)), CC)

Post-retrofit Satellite Utility Plant chilled water load AAA: = 500 x QQ x (SS – RR)

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Total post-retrofit chilled water load BBB: = ZZ + AAA

In order to account for interaction with other implemented measures, the post-retrofit chilled water loads will be stipulated to be equal to the pre-retrofit values. .

> Savings Analysis

The energy savings will be calculated as a simple difference in energy consumption.

The pre-retrofit energy consumption will be calculated for each month as follows:

Pre-retrofit peak demand (kW) TT: = max (sum(Table F.4 parameter values))

Pre-retrofit (on- and off-peak) electric energy consumption (kWh) UU: = sum (Table F.6 parameter values)

The post- retrofit energy consumption will be calculated as follows:

Post-retrofit peak demand (kW) VV: = XX x S

Post-retrofit peak demand per ton hour XX: = (max (sum(Table F-5, Table F.8 parameter values)))/BBB

(On- and off-peak) Post-retrofit energy consumption (kWh) WW: = YY x S

Post-retrofit energy consumption per ton hour YY: = (max(sum(Table F.7, Table F.8 parameter values)))/BBB

The energy savings will be calculated as the following:

Electric peak demand savings = TT – VV

(On- and off-peak) Electric energy consumption savings = UU – WW

> Metering Plan

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Ameresco will periodically download and archive the data off-site throughout the evaluation period, defined for this measure as four months from August 1 through November 30 of each evaluation year.

As part of the monitoring services, Ameresco will perform a yearly site inspection of this ECM. The observations during this inspection will be made part of the Annual Reconciliation Report.

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G.0 Commissioning

G.1 Systems Start-Up and Commissioning

The performance testing and commissioning matrix for the project is provided in Table G.0. Pre- functional and functional inspection and testing forms and procedures will be developed during the design and construction phases, based on actual system design and installation. Results of pre- functional and functional testing will be included in the O&M manuals.

The commissioning process consists of two main steps: pre-functional check and functional testing. Pre- functional check is the verification process before, during, and after construction to ensure the system is installed according to design. This process includes verification of installed equipment according to engineering specifications and submittals, verification of installation work according to manufacturer’s specifications, inspections for equipment or installation flaws or inconsistency, and other related inspection works. Pre-functional checks must be performed before a full functional testing can be performed. Each subcontractor will be responsible for their own individual checks prior to start-up and functional testing of the equipment. Ameresco will be responsible for the project-wide pre-functional checks during and after constructions to ensure the system installed is as designed.

The second step in the commissioning process, the functional test, is the process of testing the installed systems to ensure they operate as designed, and that they can achieve the performance as intended. In the functional test, operation of each piece of equipment and its operation as part of a system are verified, including motor speed, water flow and pressure, as well as other necessary parameters. The functional test also includes testing the system performance under various simulated conditions (e.g., to simulate peak heating load if the test is conducted in the summer). Results of the tests will be recorded and any discrepancies with design values will be noted. Necessary modifications will be performed to rectify a performance level that does not conform to design. Generally, Ameresco will be responsible for conducting and supervising the functional test along with approved representatives from vendors and subcontractors. NMSU’s facilities personnel are also encouraged to be involved in the process as it will help in transitioning the operation and maintenance responsibilities.

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Table G.0. Performance Testing and Commissioning Matrix

ECM Equipment/ Observations, Tests, and Pre-functional Observations, Tests, and Functional Testing Systems to be Inspections during Responsibility Inspections prior to Acceptance Responsibility Documentation Performance Construction (Functional) Tested (Pre-functional) ECM 1: Lighting Lighting fixtures Visually verify proper Lighting Measure power input at the switch Subcontractor, Lighting commissioning Retrofits and installation of all fixtures contractor or fixture for a statistically Ameresco, and data sheets will be Controls as completed. significant number of fixtures in NMSU completed for all new locations mutually agreed by NMSU fixtures. and Ameresco. ECM 2: Exterior Lighting fixtures Visually verify proper Lighting Measure power input at the circuit Subcontractor, Lighting commissioning Site Lighting installation of all fixtures contractor or fixture for a statistically Ameresco, and data sheets will be as completed. significant number of fixtures in NMSU completed for all new locations mutually agreed by NMSU fixtures. and Ameresco. ECM 3: Exterior Lighting fixtures Visually verify proper Lighting Measure power input at the circuit Subcontractor, Lighting commissioning Pole Mounted installation of all fixtures contractor or fixture for a statistically Ameresco, and data sheets will be Lighting as completed. significant number of fixtures in NMSU completed for all new locations mutually agreed by NMSU fixtures. and Ameresco. ECM 6: Retro- HVAC Systems Visual inspection and Controls Test functionality in each system Subcontractor, One line drawings, commissioning including air verification with in situ- subcontractor through the central EMCS using Ameresco, and commissioning handlers, terminal inspections and point-to- functional performance test NMSU document provided with devices, pumps, point verifications. procedures. O&M manual. fans, and controls Verify proper operation on a point- by-point basis. ECM 7: Variable HVAC Systems Visual inspection and Controls Test VAV functionality in each AHU Subcontractor, Documented results will Air Volume including air verification with pre- subcontractor through the central EMCS using Ameresco, and be provided that include Retrofit handlers, terminal functional inspections and functional performance test NMSU start-up and functional devices, fans, and point-to-point verifications. procedures. performance test reports. controls Verify proper operation on a point- by-point basis.

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Table G.0. Performance Testing and Commissioning Matrix

ECM Equipment/ Observations, Tests, and Pre-functional Observations, Tests, and Functional Testing Systems to be Inspections during Responsibility Inspections prior to Acceptance Responsibility Documentation Performance Construction (Functional) Tested (Pre-functional) ECM 10: Air handling units Visual inspection and Controls Test economizer functionality in each Subcontractor, Documented results will Economizer verification with in situ- subcontractor AHU through the central EMCS using Ameresco, and be provided that include Upgrade or inspections and point-to- functional performance test NMSU start-up and functional Repair point verifications. procedures. performance test Verify proper operation on a point- reports. by-point basis. ECM 12: Chilled Chilled water Visual inspection and Controls Test the bypass functionality in each Subcontractor, Documented results will Water Pump tertiary pumps verification with pre- subcontractor system through the central EMCS Ameresco, and be provided that include Bypass functional inspections and and Mechanical using functional performance test NMSU start-up and functional point-to-point verifications. sub-contractor procedures. performance test Verify proper operation on a point- reports. by-point basis. ECM 26: Satellite Chillers, CHW Visual inspection and Controls Test the plant functionality in each Subcontractor, Documented results will Plant Energy pumps, CW pumps, verification with in situ- subcontractor system through the central EMCS Ameresco, and be provided that include Savings glycol pumps, inspections and point-to- and Ameresco using functional performance test NMSU the functional cooling towers, ice point verifications. procedures. performance test storage systems, Verify proper operation on a system reports. and controls level basis.

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G.2 Preliminary Commissioning Plan

Purpose of the Commissioning Plan The purpose of the commissioning plan is to provide direction for the commissioning process during construction, providing resolution for issues such as scheduling, roles and responsibilities, lines of communication and reporting, approvals, and coordination.

Commissioning Goals and Objectives Commissioning is a systematic process of ensuring that the building systems perform according to the design intent and the owner’s operational requirements. All equipment and systems should be installed according to manufacturer’s recommendations and the best practices and standards of the industry. Commissioning will include documenting the design intent, followed by activities in the construction, acceptance, and warranty phases of the project. The participation of the contractors in commissioning activities will follow the requirements defined in the specifications. The three main goals of the commissioning process are:

1. Facilitate the final acceptance of the project at the earliest possible date. 2. Facilitate the transfer of the project to the owner’s maintenance staff. 3. Ensure that the comfort systems meet the requirements of the occupants. Commissioning is also intended to achieve the following specific objectives: • Document that equipment is installed and started per manufacturer’s recommendations. • Document that equipment and systems receive complete operational checkout by installing contractors. • Document system performance with thorough functional performance testing and monitoring. • Verify the completeness of operations and maintenance materials. • Ensure that the owner’s operating personnel are adequately trained on the operation and maintenance of building equipment.

Commissioning Team Information The commissioning team will consist of representatives from Ameresco, the mechanical and control subcontractors, and NMSU’s facilities staff. Individual team members will be identified together with their qualifications at a future date.

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Abbreviations and Definitions The following are common abbreviations used in this document.

A/E Architect and design engineers FPT Functional performance test

CP Commissioning provider GC General contractor CC Controls contractor MC Mechanical contractor CX Commissioning PF Pre-functional checklist EM Energy Manager PM Project Manager CX Plan Commissioning Plan document Subs Subcontractors

EC Electrical contractor TAB Test and balance contractor MM Maintenance Manager Staff Maintenance Staff

General Management Plan In general, the CP coordinates the commissioning activities and reports to the Ameresco project manager. The CP’s responsibilities, along with all other contractors’ commissioning responsibilities are detailed in the specifications. The Specifications will take precedence over this Commissioning Plan. All members work together to fulfill contracted responsibilities and meet the objectives of the Contract Documents.

General Descriptions of Roles General descriptions of the commissioning roles are as follows:

CP: Coordinates the CX process, writes and/or reviews testing plans, directs and documents performance testing. PM: Facilitates and supports the CX process and gives final approval of the CX work. MM: Coordinates maintenance staff participation in commissioning activities. GC: Facilitates the CX process, ensures that Subs perform their responsibilities and integrates CX into the construction process and schedule. Subs: Demonstrate correct system performance. Staff: Participate in commissioning tasks and performance testing, review O&M documentation, and attend training. A/E: Perform construction observation, approve O&M manuals, and assist in resolving problems. Mfr.: Equipment manufacturers and vendors provide documentation to facilitate the commissioning work and perform contracted start-up.

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Specifications and Commissioning Commissioning language in the specifications details the scope of commissioning for this project. The following table lists the sections of the specifications that include commissioning related language with a brief description.

Commissioning specifications will be developed at a future date

General Management Plan and Protocols The following protocols will be used on this project.

Issue Protocol For requests for information (RFI) The CP goes first through the PM. or formal documentation requests:

For minor or verbal information and The CP goes directly to the informed party. clarifications: For notifying contractors of The CP documents deficiencies through the PM, but may discuss deficiencies: deficiency issues with contractors prior to notifying the PM.

For scheduling functional tests or The CP provides input and coordination of testing and training. training: Scheduling is done through the PM. For scheduling commissioning The CP selects the date and schedules through the PM. meetings: For making a request for significant The CP has no authority to issue change orders. changes: For making minor changes in specified Any required changes in sequences of operations required to sequences of operations: correct operational deficiencies must be approved and documented by the PM and A/E team. The CP may recommend to the PM changes in sequences of operation to improve efficiency or control. Subcontractors disagreeing with Resolve issues at the lowest level possible. First with the CP, requests or interpretations by the CP then with the GC and PM. Some issues may require input from shall: the A/E team.

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Commissioning Process This section sequentially details the commissioning process by commissioning task or activity.

Commissioning Scoping Meeting The scoping meeting brings together all members of the design, construction, and operations team that will be involved in the commissioning process. Each building system to be commissioned is addressed, including commissioning requirements and completion and start-up schedules. During the scoping meeting, all parties agree on the scope of work, tasks, schedules, deliverables, and responsibilities for implementation of the Commissioning Plan.

Final Commissioning Plan The commissioning agent finalizes the draft Commissioning Plan using the information gathered from the scoping meeting. The initial commissioning schedule is also developed along with a detailed timeline. The timeline is fine-tuned as construction progresses.

Design Intent Documentation The design requirements, relative to the building systems selected for commissioning, must be explicitly documented in order to establish a baseline of performance expectations to which the actual installed performance is compared. The commissioning provider, with the assistance of the building owner and design team, prepares a Design Intent Summary that documents the design intent for those building systems selected for commissioning. The Design Intent Summary reflects the underlying assumptions and requirements that become represented in the construction documents.

Submittals The general contractor will provide the commissioning agent with a set of equipment and system submittals. This equipment data includes installation and start-up procedures, O&M data, performance data, and temperature control drawings. The subcontractors, general contractor, or A/E notify the commissioning agent of any new design intent or operating parameter changes, added control strategies and sequences of operation, or other change orders that may affect commissioned systems.

Site Observation The commissioning agent makes periodic site visits to witness equipment and system installations. Each site visit will have a specific agenda and will be coordinated with the general contractor site supervisor. The commissioning agent attends selected planning and job-site meetings in order to remain informed on construction progress and to update parties involved in commissioning. The general contractor provides the commissioning agent with information regarding substitutions or change orders that may affect commissioned equipment or the commissioning schedule.

Pre-functional Checklists and Startup Procedures A Pre-Functional Inspection Checklist is developed and completed for all mechanical equipment being commissioned. The checklist captures equipment nameplate and characteristics data, and confirms the as-built status of the equipment or system. The checklists ensure that the systems are complete and operational and document the installation of components and completion of systems.

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The checklists are prepared by the commissioning agent from manufacturer’s data, drawings, and specifications to include the required installation, checkout, and start-up procedures. The installing subcontractors date and initial the checklists as the construction and start-up is completed. The commissioning agent reviews and verifies the completed checklists before scheduling the functional performance testing.

Development of Functional Test and Verification Procedures Functional performance testing verifies the intended operation of individual components and system interactions under various conditions and modes of operation. The systems are run through all of the sequences of operation and the response of components is verified. Testing proceeds from components to subsystems to systems, and finally to interlocks and connections between systems.

The commissioning agent prepares functional performance test plans so that the complete sequence of operations is included. The commissioning agent obtains all documentation, including an updated points list, control sequences, and setpoints. If necessary, the commissioning agent may request clarifications from contractors and the design team regarding sequences and operation. Prior to execution, the commissioning agent provides a copy of the primary equipment tests to the installing subcontractor and general contractor who can review the tests for feasibility, safety, warranty, and equipment protection.

Execution of Functional Testing Procedures The commissioning agent schedules functional tests through the general contractor and subcontractors. Under the supervision of the commissioning agent, the installing subcontractor performs the hardware and/or software manipulations required for the testing. Owner maintenance staff may also be present in order to assist in system observations. The commissioning agent witnesses and records the results of functional performance testing. Any deficiencies found from functional performance testing will be documented in a Deficiency Report. The report will include all details of the components or systems found to be non-compliant with the parameters of the functional performance test plans and design documents. The deficiency report will become part of the punch list. The report will detail the adjustments or alterations required to correct the system operation, and identify the responsible party. The deficiency report will be continuously updated. The commissioning agent schedules any required retesting through the general contractor. Decisions regarding deficiencies and corrections are made at as low a level as possible, preferably between commissioning agent, subcontractor, and general contractor.

Short-Term Diagnostic Monitoring Short-term diagnostic testing, using data acquisition equipment or Building Automation System trends to record system operation over a suitable period, may be used to investigate the dynamic interactions between components in the building system. The monitoring occurs after occupancy to evaluate the building systems’ performance under natural occupancy and ambient load conditions. The objectives of the monitoring are to: evaluate scheduling, the interaction between heating and cooling, and the effectiveness of the systems in meeting the comfort requirements of the occupants.

Operations and Maintenance Manuals The Operation and Maintenance Manual is prepared by the contractors for the owner’s maintenance personnel are reviewed for completeness. The contractors are encouraged to submit O&M manuals at the

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earliest possible date. Materials may be added, or requested from the contractors, to stress and enhance the importance of system interactions, troubleshooting, and long-term preventative maintenance and operation. A database of preventative maintenance information may also be created from the materials in the O&M manuals.

Training and Orientation of Owner Personnel and Occupants Effective maintenance personnel training is critical to the long term performance of the new building. The commissioning agent will assist the owner and general contractor in organizing the training sessions by identifying the appropriate staff for each session and creating an overall training plan.

For each training session, the contractors provide a detailed agenda for each piece of equipment or system for which training is required. The agenda describes the training scope, duration, and methods, along with the name and qualifications of the trainers. The commissioning agent develops a plan for including in the training session contractors / trainers from different disciplines, when appropriate. The trainer documents each training session (duration, general subjects covered, and attendees). The commissioning agent may witness any of the training sessions.

Warranty Period Seasonal variation in operations or control strategies may require additional testing during peak cooling and heating seasons to verify system performance. During the warranty period, seasonal testing and other deferred testing is completed as required to fully test all sequences of operation. The commissioning agent coordinates this activity. Tests are executed and deficiencies corrected by the appropriate subcontractors, witnessed by facilities staff and the commissioning agent. Any final adjustments to the O&M manuals and as-builts due to the testing are made. The commissioning agent will request input from the owner’s operations staff and occupants about the performance of the building systems. The commissioning agent also supports the general contractor’s troubleshooting process during the warranty period. The general contractor’s warranty team will first try and resolve the issues before requesting assistance from the commissioning agent.

Commissioning Report A final Commissioning Report will be compiled which summarizes all of the tasks, findings, and documentation of the commissioning process. The report will address the actual performance of the building systems in reference to the design documents. All test reports by various sub-contractors, manufacturers and controlling authorities will be incorporated into the final report. The commissioning report includes: • An evaluation of the operating condition of the systems at the time of functional test completion, • Deficiencies that were discovered and the measures taken to correct them, • Functional test procedures and results, • Reports that document all commissioning field activities as they progressed, and • A description and estimated schedule of required deferred testing.

General Issues The following sequential priorities are followed:

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1. Equipment is not “temporarily” started (for heating or cooling), until pre-start checklist items and all manufacturers’ pre-start procedures are completed and moisture, dust, and other environmental and building integrity issues have been addressed. 2. Functional performance testing does not begin until pre-functional, start-up and testing and balance (TAB) is completed for a given system. 3. The controls system and equipment it controls are not functionally tested until all points have been calibrated and pre-functional checklists are completed.

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Sample Project Schedule

Pending

Preliminary Commissioning Schedule - Sample

Commissioning Activity Duration Estimated Estimated Start Date Completion Date Document Design Intent and Basis of Design Commissioning Plan Preliminary Commissioning Plan Scoping Meeting Final Commissioning Plan Submittals and test writing Review mechanical submittals Write start-up and PF checklists DDC program review meeting Write FPT Tests Construction observation Site observations HVAC PF checklist completion Equipment start-up Start-up documentation Controls system checkout Test and balance (TAB) TAB air side TAB water side HVAC functional performance testing Substantial completion Post acceptance phase Owner move-in Short-term diagnostic monitoring O&M, training, reporting, and warranty O&M manuals submitted Review O&M manuals Review as-built documentation Seasonal testing Final Commissioning Report

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G.3 Sample Pre-functional Checklist

Prefunctional Checklist

Project

PC- VARIABLE FREQUENCY DRIVE on

1. Submittal / Approvals Submittal. The above equipment and systems integral to them are complete and ready for functional testing. The checklist items are complete and have been checked off only by parties having direct knowledge of the event, as marked below, respective to each responsible contractor. This pre- functional checklist is submitted for approval, subject to an attached list of outstanding items yet to be completed. A Statement of Correction will be submitted upon completion of any outstanding areas. None of the outstanding items preclude safe and reliable functional tests being performed. List attached.

Mechanical Contractor Date Controls Contractor Date

Electrical Contractor Date Sheet Metal Contractor Date

TAB Contractor Date General Contractor Date

Prefunctional checklist items are to be completed as part of start-up and initial checkout, preparatory to functional testing. • This checklist does not take the place of the manufacturer’s recommended check-out and start- up procedures or report. • Items that do not apply shall be noted with the reasons on this form (N/A = not applicable, BO = by others). • If this form is not used for documenting, one of similar rigor shall be used. • Contractor’s assigned responsibility for sections of the checklist shall be responsible to see that checklist items by their subcontractors are completed and checked off. • “Contr.” column or abbreviations in brackets to the right of an item refer to the contractor responsible to verify completion of this item. A/E = architect/engineer, All = all contractors, CA = commissioning agent, CC = controls contractor, EC = electrical contractor, GC = general contractor, MC = mechanical contractor, SC = sheet metal contractor, and TAB = test and balance contractor, = ______.

Approvals. This filled-out checklist has been reviewed. Its completion is approved with the exceptions noted below.

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Commissioning Agent Date Owner’s Representative Date

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2. Requested documentation submitted Check if Okay. Enter comment or note number if deficient. Check Equip Tag-> Contr. Manufacturer’s cut sheets Performance data (fan curves, coil data, etc.) Installation and start-up manual and plan Sequences and control strategies O&M manuals

• Documentation complete as per contract documents for given trade ...... ___ YES ___ NO

3. Model verification [Contr = ______] 1 = as specified, 2 = as submitted, 3 = as installed. Check if Okay. Enter note number if deficient. Equip Tag---> 1 Manuf. 2 3 1 Model 2 3 Serial # 3 1 Capacity 2 3

• The equipment installed matches the specifications for given trade ...... ___ YES ___ NO

4. Installation Checks Check if Okay. Enter comment or note number if deficient. Check Equip Tag-> Contr.

General Installation Permanent label affixed Securely mounted Drive location not subject to excessive temperatures Drive location not subject to excessive moisture or dirt Drive size matches motor size Pilot lights functioning VFD wired to controlled equipment

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Check if Okay. Enter comment or note number if deficient. Check Equip Tag-> Contr.

Programming and Controls Internal setting designating the model is correct Input of motor FLA represents 100% to 105% of motor FLA rating Appropriate Volts vs Hz curve is being used Accel and decel times are around 10-50 seconds, except for special applications. Record actual for each unit.

Lower frequency limit at 0 for VAV fans and around 10-30% for chilled water pumps. Record actual for each unit.

Upper frequency limit set at 100%, unless explained otherwise VFD interlocked to control system Static or differential pressure sensor or other controlling sensor properly located and per drawings Controlling sensor calibrated Unit is programmed with full written programming record submitted RPM readout in BAS verified with VFD readout All control devices, pneumatic tubing, and wiring complete Specified sequences of operation and operating schedules have been implemented with all variations documented Specified point-to-point checks have been completed and documentation record submitted for this system

Final Start-up report completed with this checklist attached Safeties installed and safe operating ranges for this equipment provided to the commissioning agent

• The checklist items of Part 4 are all successfully completed for given trade...... ___ YES ___ NO

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G.4 Sample Functional Performance Test Procedure

Functional Performance Test

Variable Frequency Drive (VFD) VAV Fan Application

Constant Static Pressure Application

Project: ______Date: ______Address: ______

Commissioning Participants: Commissioning agent: ______of ______EMS operator: ______of ______VFD technician: ______of ______HVAC technician: ______of ______Owner's rep.: ______of ______

Air handler ID:______. ___ Supply fan (SF) Hp: ___ CFM: ______RPM ______SP______Return fan (RF) Hp: ___ CFM: ______RPM ______SP_____ VFD brand and model: ______

The following functional performance test is for a VFD controlling a VAV air handler to a constant duct static pressure (SP). A check-mark denotes acceptance or compliance.

I. Design Intent and Documentation Verification ___ Review the design documents and the specifications. ___ Verify that the VFD ___description, ___specifications, ___technical and troubleshooting guide and the installation, ___programming record and ___balance report are on-site. From the design documents determine: Location of static pressure sensor: ______Nearest duct fitting upstream (fitting and distance):______Nearest duct fitting downstream:______Control strategy for the return fan:______

II. VFD Installation Static Pressure Sensor Linear Position Location of sensor in % of the distance from fan to terminal box: ______Normally, the sensor should be located 2/3 to 3/4 the distance from the fan to the terminal box of the most restrictive branch. ____Complies?

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Pressure Reading Reliability Nearest duct fitting upstream (fitting and distance):______Nearest duct fitting downstream:______The SP sensor controlling the VFD must be located so as to properly sense the static pressure in the duct without being adversely affected by changes in flow from duct fittings. This ideally requires the sensor to be at least 10-duct diameters downstream and 5-duct diameters upstream from any duct take-off or elbow fittings. ___Complies?

Pressure Offset (Po) Duct static pressure fan is being controlled to: ______in. H20 [A]. Pressure rise across supply fan at design conditions (from balance report summary): ______in. H20 [B]. Pressure offset, Po, [A] / [B]: ______. Optimally, Po should be 0.3 or less in order for the VFD and fan to be able to respond to small pressure changes and realize adequate energy savings. If Po is greater than 0.4, the duct SP sensor is probably located too close to the fan. ___Complies?

Balancing to Lowest Pressure

Review the HVAC balance report and verify that according to the report, the system was balanced so the VFD controls to the lowest possible duct static pressure (that is, a capacity test was performed). The controlling duct static pressure from balance reports is ______in. H20. The corresponding VFD frequency or fan RPM from the balance report is: supply fan (SF):______, return fan (RF):______. Refer to the end of this test for details of the capacity test. ___Balanced to lowest static? (this is further verified by #2 under Section IV)

Turn-Down Ratio

What is the minimum Hz the VFD will take the fan to? ______What is the reason for any limitations?______

General Issues

___ Verify that any power quality mitigation measures required from the specifications have been completed. ___ Verify that any inlet vanes or outlet dampers on the fan have been removed or permanently held full open. ___ Verify verbally that the acceleration and deceleration ramp time of the VFD is between one and four minutes. Actual ramp time: up _____min. down _____min. (Too short of ramp times will result in "hunting" and excess modulation by the VFD, typical ramp times are 1 to 4 minutes)

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___ Verify that the lower frequency limit is 0, unless explained. ___ Verify that the VFD has been integrated into the EMS as per specification. ___ Verify that the EMS monitors the duct static pressure or that an in-line "T" in the static pressure hose is extended to near the VFD, from which a magnehelic static pressure reading can be made during testing.

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III. Functional Performance Test This test is not intended to verify that the VAV system is functioning properly, but rather that the VFD is functioning properly.

1. Boxes Partially Open (intermediate CFM). If current conditions are such that the system is not expected to be in full cooling, nor be at the minimum flow condition: a. Read the frequency output of the VFDs and record in Table 1 in the "Boxes Partially Open" column for both the supply fan (SF) and return fan (RF) if applicable. b. Read the duct static pressure and record in the same column.

If the conditions are not in an "intermediate" position, change all space temperature setpoints to 4ºF below the actual temperature in the space, to simulate an approaching of thermostat satisfaction and take readings.

2. Boxes to Maximum Open (Full Cooling). Using the (EMS) or other means, change all the space temperature setpoints to at least 10ºF below the current space temperature so that the entire HVAC system supplied from this fan is in full cooling in all zones and all terminal boxes are open to their maximum "stops."

a. Measure or read the duct static pressure controlling the VFD and record in the "Open to Max. Stop" column in Table 1. b. Read the frequency output of the VFDs and record in Table 1.

3. Boxes to Minimum Positions. Change all space temperature setpoints to be equal to the actual space temperatures to simulate a satisfied condition, driving the boxes to their minimum. a. Take the frequency and static pressure readings and record in Column D.

IV. Analysis

Table 1. A B C D Design static pressure_____ Terminal Boxes Boxes Partially Boxes Closed Design freq. (Hz): SF _____ RF _____ Open to Max. Open to Min. Stop Design RPM: SF_____ RF _____ Stop SP being controlled to now ______SF | RF SF | RF SF | RF VFD frequency. or RPM | | | Static pressure during VFD test Static pressure during capacity test (from TAB report data form)

1. Fractional variance of SF design frequency or RPM to full open, 1-(B / A): _____. If the full open SF frequency or RPM is more than 5% less than the design value (assuming the design and actual static are equal), all boxes may not be driven full open. Investigate as appropriate.

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___Less than 5% variance?

2. The SP with full open boxes (B) should be significantly less than the SP during the partially loaded conditions and should be within 0.15 inches SP of the SP from the capacity test. If the VFD SP is greater than the capacity test SP, all boxes may not be fully open. If the SP’s are not close to each other, the TAB data may be inaccurate. Compliance basically verifies that a capacity test was completed. ___Complies?

3.___Is the SP in (C) and (D) within 10% of controlled variable in (A)?

4.___The min. turn down ratio (from Section II) should be close to (freq. D/B) Y/N?

5.___Return fan RPMs or frequencies track well with changes in SF RPM, accounting for changes in OSA quantities and relief strategy?

6. Static pressure (SP) readings at the last two conditions should remain within 5% of each other. If the there is more than a 5% variance, the sensor may be unstable, possibly from being too close to duct fittings. ___Less than 5% variance?

___Collaborative Trending: If the variance is greater than 5% and if the Pressure Reading Reliability location doesn’t comply, from Section III, trending (monitoring) the SP against terminal unit damper position or SF flow is recommended to confidently verify stability. The SP should remain constant (+/- 5%) regardless of damper position or flow.. SP trended? ______Complies? (sensor is stable)

7.___For the frequency or RPM readings in Table 1, are the values in Col. B > C > D?

V. Training ___The training specified in the design incentive agreement has been completed.

Required Capacity Test To insure that energy use is minimized, the HVAC system must be balanced at design conditions at the lowest possible static pressure possible. This requires that the lowest possible static pressure (SP) be found at the sensor that will allow full design flow at the terminal units (TU) most difficult to satisfy. This system minimum SP found is what the VFD should control to. This is accomplished by changing the temperature setpoint for all zones to 55ºF, causing all TU to be calling for full cooling. Each TU’s airflow is then measured against the design flow. The TU that is receiving the lowest fraction of design is identified. The current SP at the controlling sensor is noted. A calculation is made, giving the SP required at the sensor to allow the identified most critical TU box to meet its design flow. The equation 2 2 is SP2 = SP1 x Q2 / Q1 . Where Q1 = actual or fraction of design flow during capacity test. Q2 = design flow or 1.0 if using fractions. SP1 = SP at sensor. SP2 = SP to control to. It is noted that if all boxes were

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calling for full cooling simultaneously, the fan could not maintain the new SP2 value, due to diversity fan size reduction having been made by the design engineer.

Parties required for VFD site commissioning work Commissioning agent To witness and record the tests. EMS operator To drive boxes open and shut by changing the setpoints, etc. VFD technician To use the keypad to verify the ramp time. (unless verified at start-up, which is recommended). Sequencing the keypad to display ramp time could be done by the commissioning agent, alone after reviewing the VFD technical manual. HVAC technician To apply magnehelic gages to the pressure tap to measure duct static, if not monitored by EMS.

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T.4 Sample Manufacturer’s Installation Checklist and Start-Up

Each piece of equipment will be started and tested following the manufacturer’s written start-up procedures. These procedures will be included as part of the O&M manuals provided at the conclusion of the project.

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H.0 Acceptance Procedures

Upon completion of the pre-functional testing and prior to completion of the functional performance testing, Ameresco will submit Certificates of Substantial Completion for ECMs that provide a performance and financial benefit to NMSU. The Certificates Substantial Completion will have accompanying punch lists; all punch list items that could directly affect the potential to generate energy cost savings must be completed prior to functional performance testing. Note that the warranty periods for equipment/systems that are in operation will begin upon execution of the Certificates of Substantial Completion for each ECM.

Upon completion of all punch list items that could potentially affect an ECM’s ability to generate energy cost savings, the functional performance tests will be completed. Upon successful completion of these tests, the ECMs are deemed to have the potential to achieve the estimated energy cost and maintenance savings. Ameresco will then formally request from NMSU an inspection of the work completed. A Certificate of Acceptance of Construction Completion and Inspection will accompany the formal inspection request. The Certificate of Acceptance of Construction Completion and Inspection formally acknowledges that the work has been completed, or a portion thereof, and is being accepted. Some ECMs may not be able to be completed at that time due to circumstances beyond Ameresco’s control. In these instances, a percentage complete will be assigned to the ECM, and a punch list of outstanding items will be included. Typically, these items will not have an impact on the savings or the potential to achieve savings because the functional performance test will have been completed prior to requesting the final inspection. All outstanding punch list items will be completed as soon as possible.

O&M manuals will be provided upon completion of all functional performance tests and upon completion of the as-built documentation. All necessary training will be provided as outlined herein.

Documentation to be provided include O&M manuals, which (in printed form) will be contained in a sturdy binder with 8.5-inch by 11-inch sheets of paper and consist of the following sections and information:

• Section I – System Description

- A detailed description of each system, including its major components and function.

- Control strategies and sequences describing start-up, modes of operation, and shut-down.

- Procedures for the operation of every system, including all required emergency instructions and safety precautions.

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- Reduced scale schematic or piping and instrument diagram drawings depicting system overviews.

• Section II – Equipment Data Sheets

- Corrected shop drawings, including performance curves, efficiency ratings, features, and options.

- Copies of approved certifications and factory test reports, where applicable.

- Wiring and control schematics detailing the operation and control of each component for troubleshooting.

- Manufacturer’s O&M manuals.

- Manufacturer’s spare part lists.

- Manufacturer recommended spare parts inventory list.

- Manufacturer’s recommended lubricating schedule, including type, grade, temperature, and frequency.

- Name, address, and telephone number of the manufacturer’s local representative for each type of equipment for replacement parts and service.

• Section III – Maintenance

- This section will be modified for each project based on the maintenance requirements of the contract.

• Section IV – Test Reports

- Pre-functional reports—equipment start-up reports and commissioning data sheets

- Functional reports—system start-up reports and functional performance tests

- Copies of welder certifications, where applicable.

- Non-destructive testing reports, where applicable.

- Hydrostatic/pneumatic pipe testing reports, where applicable.

- Water treatment analysis and report, where applicable.

- Testing and balancing reports, where applicable.

- Other reports as applicable.

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• Section V – Warranties/Guarantees

- A typewritten warranty, on company letterhead, for each system installed. The warranty will state the system and components covered, the duration of the warranty period, and emergency contact phone numbers for service and repair.

- Warranties/guarantees from subcontractors or equipment suppliers.

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I.0 Training Plan

Training and orientation on the systems installed will vary depending on the complexity of the specific equipment installed for each ECM. Training will be provided in the following levels:

Level 1: For systems and/or equipment that are essentially direct replacements of existing equipment, and where no additional specific skills will be required to perform operations and maintenance functions, training will be limited to a general overview of the equipment installed and a review of the O&M manuals. Training will be directed to NMSU facilities operation and maintenance personnel. The review of the O&M manuals will provide staff with familiarity with the equipment that is installed, manufacturer’s recommended maintenance procedures, and warranty information. Training should be provided at the completion of construction of each of the ECMs.

Level 2: For systems/equipment that are new to the site and require some general understanding as to their function and operation, training will include a minimal amount of classroom time that will provide an overview of the technology and any specific maintenance or operation requirements. Following the classroom training, a site tour will be conducted to view the installation and operation of the equipment. Training should occur at both the onset and completion of construction. Equipment cut sheets will be provided at the beginning of construction and that will provide a general description of the equipment, function, and operation. At the conclusion of construction, the O&M manuals will provide parts lists and warranty information.

Level 3: For systems and/or equipment that are new to the site and more complex in nature, training will be directed to both the facilities engineering and the O&M personnel. In general, training will consist of classroom training followed by hands-on instruction in the field. Training will be provided through a complement of Ameresco personnel, design engineers, installation contractors, and manufacturer’s representatives, as necessary, and will be dictated by the complexity of the installation, participant’s prior experience with the equipment that is installed, and contractual obligations.

Specifics on the training program, including schedule and training materials, will be further refined during the design process, but the training, in general, will consist of the following:

- Explanation of the design concept

− Design intent

− Energy efficiency considerations

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− Seasonal modes of operation

− Emergency conditions and operation

− Comfort conditions and indoor air quality

- Systems operation

− Operation of individual components, instruction from authorized factory technicians, if required

− Physical location of critical shut-off valves, fire, smoke, and balancing dampers, relief valves, safeties, and control panels

− System operational procedures for all modes in manual and automatic modes

- Operation of the control systems

− Sequences of operation

− Use of graphical user interfaces

− Alarms and problem indicators

− Diagnostics and corrective actions

- Service and maintenance

− Use of the O&M manuals

− Instruction and logging procedures for lubrication

− Instruction from authorized factory technicians, where applicable

− Troubleshooting and investigation of malfunctions

− Recommended procedures for collecting, interpreting, and storing specific performance data

The types of training planned for this project is listed in Table I.0. Training will be provided during construction, commissioning, and acceptance phases as dictated by the complexity of the ECM.

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Table I.0. Training Plan

Training (Hours) Training Energy Conservation Measure Level Classroom Field ECM 1: Interior Lighting 1 N/A 1 ECM 2: Exterior Lighting 1 N/A 1 ECM 3: Exterior Pole Mounted Lighting 1 N/A 1 ECM 6: Retro-commissioning 2 2 4 ECM 7: VAV Retrofit 2 2 4 ECM 10: Economizer Upgrade or Repair 1 N/A 2 ECM 12: Chilled Water Pump Bypass 2 2 3 ECM 26: Satellite Plant Savings 3 4 4 ECM 27-29: MyEnergyPro™ 3 8 N/A

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J.0 Operations and Maintenance Plan

A well-designed and properly executed maintenance program is a crucial element to long-term ECM performance and savings. In order to maximize the energy savings and equipment performance, the ECMs should be maintained under an on-going, structured service program for the life of the contract, and ideally beyond. Ameresco has a vested interest in the equipment performance and maintenance required to realize all possible energy savings, which form the basis of our guarantee. Typically, the equipment and systems Ameresco proposes can generally be maintained and serviced by a variety of service entities including maintenance personnel currently employed by NMSU and/or a combination of service providers.

J.1 Scheduled Preventative Maintenance

Table J.0 shows a summary of the O&M plans for this project. Detailed descriptions of the included scope for each ECM are presented following Table J.0.

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J.0 Operations and Maintenance Plan New Mexico State University Page 344 January 31, 2014 Technical Energy Audit

Table J.0. Operations and Maintenance Matrix

Operations Responsibilities Maintenance Responsibilities ECM Ameresco NMSU Ameresco NMSU Warranty

ECM 1: Interior None None None Fixture cleaning The lamps and ballasts are Lighting covered by manufacturer's Corrective maintenance at warranties. All warranties will be lamps and ballasts after administered by each individual warranty period. manufacturer. Ameresco will furnish, upon completion of work, contact information for all manufacturers. For warranty purposes, manufacturers may request the defective product be returned for analysis. NMSU must retain all lamps and ballasts which fail prematurely and provide to the manufacturer upon request.

ECM 2: Exterior None None None Fixture cleaning The lamps and ballasts are Lighting covered by manufacturer's Corrective maintenance at warranties. All warranties will be lamps and ballasts after administered by each individual warranty period. manufacturer. Ameresco will furnish, upon completion of work, contact information for all manufacturers. For warranty purposes, manufacturers may request the defective product be returned for analysis. NMSU must retain all lamps and ballasts which fail prematurely and provide to the manufacturer upon request.

Page content is subject to Confidentiality Restrictions. New Mexico State University J.0 Operations and Maintenance Plan January 31, 2014 Page 345 Technical Energy Audit

Table J.0. Operations and Maintenance Matrix

Operations Responsibilities Maintenance Responsibilities ECM Ameresco NMSU Ameresco NMSU Warranty

ECM 3: Exterior None None None Corrective maintenance at The lamps and ballasts are Pole Mounted lamps and ballasts after covered by manufacturer's Lighting warranty period. warranties. All warranties will be administered by each individual manufacturer. Ameresco will furnish, upon completion of work, contact information for all manufacturers. For warranty purposes, manufacturers may request the defective product be returned for analysis. NMSU must retain all lamps and ballasts which fail prematurely and provide to the manufacturer upon request.

ECM 6: Retro- None Periodic inspections to None Preventive maintenance per Ameresco provides a 1-year Commissioning verify proper operation. manufacturer’s warranty and transfers recommendations including manufacturer’s warranty on sensor calibration at equipment and material. recommended intervals. Corrective maintenance at sensors, equipment, and sequences, as necessary.

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J.0 Operations and Maintenance Plan New Mexico State University Page 346 January 31, 2014 Technical Energy Audit

Table J.0. Operations and Maintenance Matrix

Operations Responsibilities Maintenance Responsibilities ECM Ameresco NMSU Ameresco NMSU Warranty

ECM 7: VAV None Periodic inspections to None Preventive maintenance per Ameresco provides a 1-year Retrofit verify proper operation. manufacturer’s warranty and transfers recommendations including manufacturer’s warranty on sensor calibration at equipment and material. recommended intervals. Corrective maintenance at sensors, equipment, and sequences, as necessary.

ECM 10: None None Preventive maintenance per Ameresco provides a 1-year Economizer manufacturer’s warranty and transfers Upgrade or recommendations including manufacturer’s warranty on Repair sensor calibration at equipment and material. recommended intervals. Corrective maintenance at sensors, equipment, and sequences, as necessary.

ECM 12: CHW None None Preventive maintenance per Ameresco provides a 1-year Pump Bypass manufacturer’s warranty and transfers recommendations including manufacturer’s warranty on sensor calibration at equipment and material. recommended intervals. Corrective maintenance at sensors, equipment, and sequences, as necessary.

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Table J.0. Operations and Maintenance Matrix

Operations Responsibilities Maintenance Responsibilities ECM Ameresco NMSU Ameresco NMSU Warranty

ECM 26: None Operate plant systems None Preventive maintenance per Not applicable Satellite Plant based upon the manufacturer’s Savings manufacturer’s recommendations including recommendations and sensor calibration at sequences of operation. recommended intervals. Corrective maintenance at sensors, equipment, and sequences, as necessary.

ECM 28-30: None Periodic inspection to None Preventive maintenance per Ameresco provides a 1-year MyEnergyPro™ ensure meter calibration. manufacturer’s warranty on programming and recommendations including transfers manufacturer’s meter calibration at warranty on equipment and recommended intervals. material.

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J.0 Operations and Maintenance Plan New Mexico State University Page 348 January 31, 2014 Technical Energy Audit

J.2 Service Descriptions

System operation: On-going, normal equipment adjustments necessary to satisfy the building occupants and assure the continued effective and efficient operation of equipment or systems.

Preventative maintenance: Periodic inspections, tests, calibrations, and adjustments needed for sustaining or restoring energy systems to required performance.

Corrective maintenance: Services needed to replace, rebuild, or restore to specified performance, the systems and equipment that are in danger of failing or are inadequate.

Local maintenance and support: The primary point of contact for service support.

J.3 Service Coordination

Ameresco’s service contact will be determined at a future date prior to turn-over to NMSU.

The scope of services for any and all of the ECMs included with this performance contract, or the programs as a whole, can be modified or fine-tuned at any time during the contract term. For example, where full coverage is not included, additional services can be provided on a time and materials basis, based on pre-negotiated rates. Services can also be provided for equipment not replaced or modified as part of this performance contract.

J.4 Operation and Maintenance Scope

The following work is a description of Ameresco’s maintenance and operation obligations under this contract. Any additional work requested beyond the scope identified below can be performed on a time and materials basis as directed by NMSU, subject to mark-ups identified in the contract.

ECM 1: Interior Lighting System Operation NMSU is responsible for the operations of the system. Preventative Maintenance Not applicable for this measure.

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New Mexico State University J.0 Operations and Maintenance Plan January 31, 2014 Page 349 Technical Energy Audit

Corrective Maintenance Ameresco will provide NMSU with additional bench stock at the end of construction to allow NMSU staff to replace any lamp or ballast that fails prematurely. NMSU will be responsible for providing replacement lamps and ballasts after the warranty period expires. Local Maintenance and Repair Support To be determined.

ECM 2: Exterior Lighting System Operation NMSU is responsible for the operations of the system. Preventative Maintenance Not applicable for this measure. Corrective Maintenance Ameresco will provide NMSU with additional bench stock at the end of construction to allow NMSU staff to replace any lamp or ballast that fails prematurely. NMSU will be responsible for providing replacement lamps and ballasts after the warranty period expires. Local Maintenance and Repair Support To be determined.

ECM 3: Exterior Pole Mounted Lighting System Operation NMSU is responsible for the operations of the system. Preventative Maintenance Not applicable for this measure. Corrective Maintenance Ameresco will provide NMSU with additional bench stock at the end of construction to allow NMSU staff to replace any lamp or ballast that fails prematurely. NMSU will be responsible for providing replacement lamps and ballasts after the warranty period expires. Local Maintenance and Repair Support To be determined.

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J.0 Operations and Maintenance Plan New Mexico State University Page 350 January 31, 2014 Technical Energy Audit

ECM 6: Retro-Commissioning System Operation NMSU is responsible for the operations of the system and shall utilize approved control sequences of operation on an on-going basis. Preventative Maintenance NMSU will periodically inspect field devices, verify system of operations, inspect and check AHU components including dampers, coils, valves, motors, belts and sheaves and other active devices, as needed. Corrective Maintenance NMSU will perform corrective maintenance as needed. Local Maintenance and Repair Support To be determined.

ECM 7: Variable Air Volume Retrofit System Operation NMSU is responsible for the operations of the system and shall utilize approved control sequences of operation on an on-going basis. Preventative Maintenance NMSU will periodically inspect field devices, verify system of operations, inspect and check AHU components including dampers, coils, valves, motors, belts and sheaves and other active devices, as needed. Corrective Maintenance NMSU will perform corrective maintenance as needed. Local Maintenance and Repair Support To be determined.

ECM 10: Economizer Upgrade or Repair System Operation NMSU is responsible for the operations of the system and shallutilize approved control sequences of operation on an on-going basis.

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New Mexico State University J.0 Operations and Maintenance Plan January 31, 2014 Page 351 Technical Energy Audit

Preventative Maintenance NMSU will periodically inspect field devices, verify system of operations, inspect and check AHU components including dampers, coils, valves, motors, belts and sheaves and other active devices, as needed. Corrective Maintenance NMSU will perform corrective maintenance as needed. Local Maintenance and Repair Support To be determined.

ECM 12: Chilled Water Pump Bypass System Operation NMSU is responsible for the operations of the system. Utilize approved control sequences of operation on an on-going basis. Preventative Maintenance NMSU will periodically operate and cycle pumps to ensure reliable operation. Corrective Maintenance NMSU will perform corrective maintenance as needed. Local Maintenance and Repair Support To be determined.

ECM 26: Satellite Plant Savings System Operation NMSU is responsible for the operations of the system. Utilize approved control sequences of operation on an ongoing basis. Preventative Maintenance NMSU shall follow manufacturer’s operations and maintenance procedures for all mechanical and controls systems and perform daily inspections and maintain operations and maintenance logs for all major equipment. Corrective Maintenance NMSU will perform corrective maintenance as needed.

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J.0 Operations and Maintenance Plan New Mexico State University Page 352 January 31, 2014 Technical Energy Audit

Local Maintenance and Repair Support To be determined.

ECM 28-30: MyEnergyPro™ System Operation NMSU is responsible for the operations of the system. Preventative Maintenance NMSU will be responsible for providing all project management on meters, communication devices, and servers. Corrective Maintenance For any Web-based programming problems or issues Ameresco’s MyEnergyPro™ warranty will take effect and problems will be resolved by Ameresco. Local Maintenance and Repair Support The primary point of contact for service support for this measure is Dr. Judy Fisher.

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J.0 Operations and Maintenance Plan New Mexico State University Page 354 January 31, 2014

Ameresco, Inc.

60 East Rio Salado Parkway, Suite 1001 Tempe, Arizona 85281

P: 801.425.3421

E: [email protected]

Contact person in the firm:

Michael Boyer Account Executive

ameresco.com