C A S E S T U D Y D I e A s Z 2 DESIGN FACILITY

t the first conceptual The team needed a fully integrated BUILDING AT A GLANCE design charrette, the design process, in which the differ- design team decided to ent design disciplines and the gen- Name IDeAs Z2 Design Facility 2 target a “Z ” goal — eral contractor make key decisions Location San Jose, Calif. Azero energy and zero carbon — to together to optimize the building as Owner Integrated Design Associates advance the state of green build- an integrated system. For example, (IDeAs) ing and to showcase the low energy carefully designed sun shading and When Built mid-1960s (originally a electrical and lighting design skills state-of-the-art glazing would allow bank branch office) of the client. For the project to be the team to make many incisions Major Renovation 2007 Renovation Scope Skylights, window replicable, the team wanted a low into the roof and concrete walls to walls, upgraded insulation and energy building that uses exist- harvest more daylight. This would glazing, high-efficiency HVAC system, high-efficiency lighting and office equip- ing technology at a reasonable cost reduce the need for electric lighting ment, rooftop and canopy photovoltaic premium. By maximizing efficiency and its attendant energy consump- system, monitoring equipment of building systems before sizing tion, while also providing outside Principal Use Commercial office the photovoltaic arrays to cover the views for building occupants. Occupants 15 remaining loads, the costs were kept Team members collaborated on Gross Square Footage 7,000 to a minimum. specifications for features such Total Renovation Cost $2,521,097 as skylights, accounting for their Cost Per Square Foot $360 Opposite Building-integrated photovoltaics impacts on not just the daylight- are incorporated into the canopy and the Distinctions/Awards single-ply roofing membrane. Using an ing design, but on the architectural, 2010 ASHRAE Technology Award, integrated system rather than panels elimi- lighting, electrical and HVAC design. First Place: Commercial Existing Buildings nated the need for panel structural sup- The result is a sophisticated design ports, which would have required approxi- Virtual Tour www.z2building.com mately 200 roof penetrations. In 2009, that uses simple controls to maximize the photovoltaic system generated more energy performance while providing electricity than the office consumed. an excellent working environment Below High efficiency fluorescent fixtures © David Wakely with8 T lamps in the main studio are mostly within a reasonable budget. The inte- time, since few opportunities exist Less Than Zero usedt a night. The building serves as a living grated design process emphasizes the to make substitutions or to eliminate lab, testing three types of ballasts that are BYAVID D K ANEDA, P.E., A IA; P ETER R UMSEY, P.E., F ELLOW A SHRAE; A ND S COTT S HELL, F ELLOW A IA importance of getting it right the first parts of the design without affecting switchedr o dimmed by daylight and occu- pancy sensors. the whole system. IDeAs Z2 Design Facility was Back in 2005, when the status quo in commercial building design was protected ready for occupation in late 2007. Today, with nearly three years by the pervading belief that green design principles were too expensive to be of energy and occupant comfort practically applied, electrical design firm Integrated Design Associates (IDeAs) data collected, the project dem- onstrates the viability of net zero made it its mission to prove otherwise. It purchased a nondescript tilt-up build- energy buildings. This daylit, well- ventilated low-rise with no gas ing that was a relic of the 1960s and hired collaborators at EHDD Architecture connection is carbon neutral, with carbon offsets purchased to cover and Rumsey Engineers to help turn this 1.5-story former neighborhood bank the embodied carbon of the building materials used in the renovation. branch into a high performing 21st-century building suitable for housing and At less than one-fourth of the energy use of a typical office,1 inspiring IDeAs’ design staff. IDeAs Z2 is one of the most efficient

© David Wakely © David commercial office buildings in the

6 HIGH PERFORMING BUILDINGS Fall 2010 Fa l l 2 0 1 0 HIGH PERFORMING BUILDINGS 7 This article was published in High Performing Buildings, Fall 2010. Copyright 2010 American Society of Heating, Refrigerating and Air- Conditioning Engineers, Inc. Posted at www.hpbmagazine.org. This article may not be copied and/or distributed electronically or in paper form without permission of ASHRAE. For more information about High Performing Buildings, visit www.hpbmagazine.org. © David Wakely © David Natural ventilation features include a seriesf o sliding glass doors and windows on the south side of the building that open sloped to minimize any shading on BUILDING ENVELOPE onto IDeAs’ drought-tolerant garden and the rooftop solar panels. bocce ball court. Roof The team factored in solar heat Type Building-integrated photovoltaic gain effects when estimating cooling membrane U.S. The actual measured energy system requirements. The architect Overall R-value R-30 Reflectivity 80 (SRI) use intensity for this building in selected the size, placement and 2009 was 21.17 kBtu/ft2 · yr (with a glass type for the skylights to care- Walls 2 Type 5 in. concrete plus R-19 batts 21.72 kBtu/ft · yr contribution from fully balance the daylight needs with Overall R-value R-19 the photovoltaic array for a net of their thermal impact. The daylight Glazing Percentage Walls 12; Roof 4.3 –0.55 kBtu/ft2 · yr). designers selected a high perfor- Windows mance spectrally selective glass to U-value 0.29 winter night; Daylighting and Views block unwanted heat with a light-to- 0.27 summer day Solar Heat Gain Coefficient (SHGC) 0.31 Daylighting is one of the key strate- solar heat gain coefficient of 2.33. Light to Solar Heat Gain Ratio 2.33 gies for significantly reducing energy The glass allows useful visible Visual Transmittance 63% consumption. Seventeen skylights light wavelengths to enter the Location were installed into the roof to light building, while blocking most heat- Latitude 37.33°N the main studio and the second floor producing infrared and ultraviolet office space. One advantage of the radiation. A photovoltaic canopy original building’s 18-ft high ceiling mounted over the sliding glass doors ENERGY AT A GLANCE was excellent distribution of light and windows on the south side of Annual Total (Site) Energy 21.17 kBtu/ft2 throughout the workspace below. the building provides a classic pas- Electricity 21.17 kBtu/ft2 The skylights are sized to maxi- sive solar shade and protection from Renewable Energy (produced) mize hours of daylight for conditions rain in the winter, while also gener- 21.72 kBtu/ft2 on short winter days. The framing is ating additional electricity for the Net Energy Use –0.55 kBtu/ft2

8 HIGH PERFORMING BUILDINGS Fall 2010 HPB.hotims.com/33325-5 KEY SUSTAINABLE FEATURES

Daylighting Skylights, 18 ft ceilings, shading, electrochromic window Renewable Energy Building-integrated photovoltaics HVAC Radiant heating/cooling with ground-source heat pump Plug Load Reduction Energy-efficient office equipment, occupancy-controlled power strips Lighting T8 fluorescent lamps, daylight and occupancy sensors

COST ANALYSIS

Energy-efficient upgrades Upgraded glass $20,000 Radiant mechanical system $97,500 over traditional system Concrete for radiant floor $38,000 PVs (after rebates and tax $45,500 incentives) Total cost of energy- $201,000 efficient upgrades

Design fees related to $40,000 energy-efficient upgrades (soft cost) Total energy-efficient $241,000 upgrades cost including soft costs

Construction costs $2,264,607 © David Wakely © David Design fees (soft costs) $256,490 The south side of the building opens onto Building purchase $2,100,000 the courtyard, which replaced the former parking lot. The ground-source heat pump Total gross cost $4,621,097 building. This glass offers the pri- pipes are laid under this area. Photovoltaics Construction cost and $2,521,097 mary views out from the main studio using solar cells are incorporated into a design fees only (not includ- canopy (bottom). ing building purchase) into an entry courtyard. The canopy blocks direct sunlight Estimated premium for energy-efficient upgrades from entering the building during low-angle morning sun, which would Premium on gross cost 5.22% the hot summer. Conversely, as stream directly in, causing glare Premium on construction 9.56% the sun angles lower in the winter, problems. Interior blinds would have and design fees (including direct sunlight penetrates as deep solved the glare issue, but don’t soft costs, excluding build- as 16 ft into the building, warming block the solar heat gain and tend to ing purchase) the concrete radiant floor. remain closed after the glare prob- Notes • Total gross cost is cost before any federal and The east façade houses a window lem is gone. Exterior automatically state government incentives are deducted. wall that was the original entrance operated blinds were considered • Gross PV cost = $568,879 which included all supporting structures and equipment. to the building. This façade posed high maintenance and are expensive. • PV panels only = $233,063. a difficult challenge to the design The solution implemented is an • Not included in the cost are: interest, property taxes, etc., paid during construction. team since it exposed the office to electrochromic window. When

1 0 HIGH PERFORMING BUILDINGS Fall 2010 HPB.hotims.com/33325-7 © David Wakely Replacing the parking lot with drought tolerant landscaping reduces the heat island direct morning sunlight hits the heat gain from entering the building effect and irrigation needs. window, a photocell tuned to con- and reducing the summer cooling trol the glass on detection of direct load. This technology was expen- Inset The 1960s-era building originally was sunlight automatically reduces the sive, but its cost has decreased, and a neighborhood bank branch. transmission of the glass from 62% it was selected as a demonstration down to 3.5%, greatly reducing element, since it could be a widely the performance and comfort of the glare and increasing visual comfort. used strategy in the near future. building, IDeAs has experimented The glass controls light at the As part of its ongoing post-occu- with various types of sunlight con- outer pane, effectively keeping solar pancy research efforts to maximize trol concepts to manage direct-beam sunlight entering through the sky- E N E R G Y U S E D I e A s OFFICE VS. STANDARD U.S. OFFICE lights during summer months. One approach has involved installing

prismatic acrylic diffusing panels on the outside of skylights in spring and removing them in autumn. The panels diffuse the intense, focused beams of light characteristic of summer sunlight to a softer, more dispersed light. The slight reduction Lighting Plug Load HVAC in daylighting from adding the panels is acceptable in the summer when the building interior is actually over-lit, Standard office data source: U.S. Energy Information Administration

1 2 HIGH PERFORMING BUILDINGS Fall 2010 HPB.hotims.com/33325-6 with the added benefit of reduc- electric, ground-source heat pump. R-19 value in the walls and an R-30 ing the cooling load with minimal Chilled or hot water supplied by the value for the roof, which helps to increase in electric lighting energy. heat pump to the dedicated outside reduce the heating and cooling loads. The daylighting design coupled air handler conditions the air deliv- The electronic control system con- with the high efficiency electric ered to the space. trols the floor cooling flow rates and lighting design was estimated to The ground-source heat pump sys- temperature to provide the maximum reduce energy consumption for tem’s exterior cross-linked polyeth- performance for the lowest pumping lighting by 60%. Actual measured ylene (PEX) pipes are laid under the power and warmest chilled water tem- data for 2009 shows lighting energy open landscape area of the 34,014 ft2 peratures. Likewise, when heating, consumption to be a miniscule 10% site. Heavy equipment was already it adjusts the heating flow rates and of the energy use of the building—a on site to remove asphalt paving temperature to optimize performance fact made more remarkable by the from this area, so the added cost to at lowered hot water temperatures. HVAC and plug load data, which excavate for the ground-source pip- Pumps are kept at their lowest also measures much lower than a ing was affordable. The system takes demand speed using power inverter conventional office building. advantage of what the earth naturally technology based on actual demand. © EHDD Architecture

provides: a constant below-ground If high humidity is detected when Section view of IDeAs building. Integrated Design HVAC temperature of about 58°F. the system is in cooling mode, the Associates (IDeAs) transformed a 1960s-era The HVAC system is key to the net The energy efficiency for the chilled water temperature delivered concrete windowless bank building by adding win- dows, skylights and energy-efficient lighting and zero energy and zero carbon emis- HVAC, envelope and lighting is to the air handler is adjusted to HVAC.y B maximizing efficiency before sizing the sion philosophy of this building and about 40% below California’s Title dehumidify the air in the space to photovoltaic system to cover the remaining loads, costs were kept to a minimum. In 2009, the build- features a high efficiency radiant 24 Energy Efficiency Standard, mitigate the formation of condensa- ing used less energy than it produced, achieving heating/cooling slab system with an 2005. Insulation was upgraded to an tion on the exposed concrete slab. the f goal o net zero energy and carbon emissions. The radiant floor topping slab con- tains 50% fly ash, thus reducing the POST-OCCUPANCY EVALUATION SURVEY amount of cement (and embodied carbon) required. The radiant system -0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 below is comprised of PEX tubing. Overall Satisfaction – Building Operable windows and doors installed throughout the building Overall Satisfaction – Workspace allow the occupants to tailor their

Thermal Comfort comfort levels by adjusting the openings. However, when outside Air Quality air temperatures are too cold or hot and the windows or doors are Lighting not used, the dedicated outside air handler provides the required Acoustic Quality ventilation on an as-needed basis.

Cleanliness and Maintenance Ventilation air is distributed by a displacement ventilation system Office Layout with vents placed lower on walls. The vents are relatively large to Office Furnishings deliver air at low velocity, compared to traditional forced-air systems. Satisfaction Score Average of 158 Building CBE Database The exhaust ducts are placed, near Satisfaction Score Average ofIDeAs IDeAs Of ficeOffice Building Building the ceiling, and there are no returns with the 100% outside air system. Note: Survey prepared by Center for the Built Environment. © EHDD Architecture

1 4 HIGH PERFORMING BUILDINGS Fall 2010 HPB.hotims.com/33325-19 high efficiency sources and fixtures, and only place light where it is needed, when it is needed and at the appropriate level and quality. To accomplish this, designers need to have specialist knowledge of active daylight-sensing lighting control systems, motion detectors, astronomic timeclocks, dark sky concepts, task ambient concepts and human visual system concepts. At the same time, they should mini- mize use of toxic materials such as mercury in lamps and PVC. Due to the daylighting design, IDeAs’ lights are mostly illuminated at night. It uses light sources with the best combination of high effi- ciency, good color rendering and long life for indoor applications — © David Wakely currently linear fluorescent lamps. An electrochromic window on the east façade dims on detection of direct sun- In the main studio, three sets of daylight became available. This light to minimize glare and keep solar identical suspended linear fluo- system incorporates onboard infra- heat gain from entering the building. The rescent fixtures are installed with red occupancy sensors set to turn electrochromic window was selected over interior blinds, which don’t block solar different ballasts. They all use off lights when unoccupied. Instead heat gain, and exterior automatically oper- high efficiency T8 lamps. One set of light switches, the system was ated blinds, which are high maintenance and expensive. of fixtures is equipped with a high efficiency ballast that is switched by a daylight sensor and occupancy ENERGY USE AND PV PRODUCTION (2009) © David Wakely ENERGY USE AND PV PRODUCTION (2009) The building team added 17 skylights to sensor; another is equipped with a 0 light the main studio and second floor office space. The skylight openings are designed into the air, germs move up into the 78°F during the summer, which is to 10 volt dimming ballast, dimmed 6,000 to maximize daylighting, while high perfor- open space away from coworkers. within ASHRAE Standard 55-2004’s by a daylight sensor and switched ENERGY MADE: + 44,543 kWh mance glass blocks unwanted heat gain. The displacement ventilation acceptable range of comfort. by an occupancy sensor; the third The s office i primarily lit by natural light dur- 5,000 ing working hours. Occupancy and daylight also complements the radiant heat- Occupants perceive temperatures set of lights in the trio is dimmed by ENERGY USED: sensors help ensure that artificial lighting is ing and cooling slab; heating and at the edges of this range as com- a digital ballast similar to a DALI- - 43,423 kWh only used when needed. 4,000 cooling provided at the occupied fortable because they sense heat or control system. NET ENERGY:

zone level is not disturbed by the cold transfer from the radiant slab These systems were installed to kWh +1,120 kWh 3,000 Entering air is slightly cooler than air, as compared to a conventional in a direct and immediate way. allow testing and measurement of ambient air, so it’s denser and stays air handler system in which the air the relative efficiencies and com- low. The air warms and rises when in the space would be completely Lighting fort provided by each lamp ballast 2,000 heated by factors such as the natu- mixed. Thus, the radiant heating In a high performing building such combination. ral heat plumes that surround occu- and cooling slab maintains accept- as this, an electric lighting system A final set of sophisticated light 1,000 pants. One benefit of displacement able thermal comfort at wider must provide high lighting quality fixtures installed along the north ventilation is that occupied air stays ranges of indoor air temperatures. while minimizing lighting power wall of the main studio incorpo- 0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC cleaner and healthier for occupants. The temperature setpoint in the density. To succeed, lighting design- rated onboard daylight sensors, For example, if someone coughs zones during the winter is 69°F and ers need to leverage the latest in set to dim electric light output as © EHDD Architecture

1 6 HIGH PERFORMING BUILDINGS Fall 2010 Fa l l 2 0 1 0 HIGH PERFORMING BUILDINGS 1 7 controlled by software installed on a more easily understood interface them. The design for the studio the user’s personal computer that and dashboard. Importantly, lights space uses primarily daylight as a allowed users to adjust light levels, switch off completely when ade- light source during daylight hours. occupancy-sensor time-out period quate daylight is available. However, during the evening indi- and daylight settings. People determine how bright they rect linear fluorescent lights provide These light fixtures, however, perceive a space to be based on a an ambient light level, directing proved to be problematic because number of criteria. In addition to light on the ceilings and walls. of frequent software conflicts with contrast levels and age, a key fac- These lights provide about 15 user’s computers, occupancy-sensor tor affecting this perception is the footcandles on the desks at night. false tripping, daylight harvesting luminance of the main surfaces in Although well below IES recom- controls that dimmed but could not the visual plane. In a typical office, mended levels, very few staff use shut off lights when adequate day- 40 footcandles on an empty desk additional LED task lighting. light was available, and dimming does nothing to affect an occupant’s ballasts that reduced light levels to impression of brightness, while Plug Loads 10% but only reduced energy con- placing the same amount of light on IDeAs phased out older comput- sumption to 30%. a white wall in the occupant’s visual ers in favor of newer dual-core and These lights have been retrofit- plane will. quad-core computers with high- ted with a more elegant wireless Therefore, a key strategy in the efficiency power supplies.CRT control system provided by a differ- design of the studio was to use high monitors were replaced with low ent manufacturer. The lights have reflectance (80%) acoustic ceiling power LCD screens with incorpo- similar functionality but more reli- tiles and high reflectance (89%) rated speakers. Data and telecom able Internet-based controls offer paint on the walls, and then light flows are transmitted throughCAT6A

HPB.hotims.com/33325-24

HPB.hotims.com/33325-10 Another key to large plug-load into occupancy-controlled power BUILDING TEAM savings is reducing or eliminating strips. The power to task lights, PC Owner David and Stephania Kaneda office equipment phantom loads— monitors, speakers and other non- Architect EHDD Architecture the energy consumed during long essential peripherals will shut down hours of standby. For example, when users leave their desks. The General Contractor Hillhouse Construction IDeAs found that even its ENERGY PC itself uses software to go into Mechanical Engineer Rumsey Engineers STAR-rated laser plotter has no sleep mode. actual off switch, and consumes 30 Electrical Engineer & Lighting Designer Integrated Design Associates (IDeAs) kWh in standby mode. Monitoring Structural Engineer Tipping Mar The solution is to tie the plotter’s The building incorporates panel circuits to the building security boards using a power harness to Landscape Architect MPA Design system, so that the machine is shut monitor the performance of the down when the security system is building circuit-by-circuit. This armed at night and turned on the allows the design team to monitor cabling, consuming half the wire next day when the security system each component of the HVAC sys- resources and less energy than is disarmed, giving it time to warm tem, each lighting circuit and each conventional separate cable sys- up and avoiding any impact on receptacle circuit, collecting data to tems. Rather than desktop phones, productivity. measure performance of the various employees use headsets that con- To further reduce office equip- systems. The design team performs nect to a voice-over-IP system, ment phantom loads, worksta- in-depth analysis on the interaction translating to further energy savings. tion devices are now plugged of various systems. The collected

© David Wakely At less than one-fourth the energy use of LESSONS LEARNED a typical office (CBECS 2003), IDeAs Z2 si data is being used to measure the Photovoltaics onef o the most efficient commercial office accuracy of the daylighting and This all-electric building is powered buildingsn i the U.S. Daylighting with high Seek out and eliminate unnecessary investigated. The increase was caused design flaw that required the replace- energy modeling software, leading by a roof-integrated, grid-tied, net performance windows, a radiant slab with drains on electricity. Do circuit-by-circuit by a power outage that reset the ment of the entire system, compromis- an electric ground-source heat pump, natu- monitoring to determine what circuits are energy management system tempera- ing the power output that the system to improvement of these tools for metering photovoltaic system. It ral ventilation, efficient lighting, plug load being used and when. Continue monitor- ture settings to default levels. should have supplied and reducing the integrated designs. was sized to deliver 28 kW ac for reductions and an energy monitoring sys- ing to determine equipment and systems rebate paid by the utility company. More Be aware of new-technology risk. The tem all contribute to the low energy use. that are not performing as expected or that recently, the supplier entered bank- The system also will allow energy an estimated 56,000 kWh per year. failure of a technology trial on a small have failed or malfunctioned. ruptcy, placing 20-year warranty agree- subsystem component isn’t a big threat, monitoring data to be automatically Building-integrated photovoltaics • IDeAs found that the emergency lighting ments into jeopardy. but a definite advantage exists for field- system battery ballasts are using 30 VA • A new technology in an induction lamp posted online. Eventually, IDeAs (BIPV) using solar cells incorporated the building. The modules allow proven technologies from reliable vendors per 32 W fluorescent lamp continuously. was unavailable at the published would like to make this data avail- directly into a single-ply PVC roofing filtered light to pass through, and for major subsystems. It is researching alternative emergency introduction date and needed to be • IDeAs tried a sophisticated linear fluo- able to interested researchers. membrane are used due to their light occupants can view the photovoltaic lighting technology to eliminate this substituted. Once supplied, all of the rescent lighting system that featured surprisingly large vampire load. lamps, which were designed to provide The backbone of the building’s weight and low cost of installation. cells in the modules from below onboard occupancy sensors, daylight • The original HVAC design ran the venti- 15,000 hours of operation and 50,000 sensors and PC-installed control electrical energy system is the The design team estimates that a when entering or exiting the lation fans whenever the radiant system switching operations, failed after less software to give individual control to was on. As a result, fans were running than 500 hours and 900 operations. inverter that converts the dc power traditional photovoltaic system of building. software. Although promising, the unnecessarily 24 hours a day, since Eventually, a different version of the coming down from the rooftop equal size would require approxi- An important lesson in technology system proved to be problematic. A the slow reacting radiant slab needs to lamp was supplied that is performing key issue was the control software, solar source into ac power to run mately 200 roof penetrations for risk is that the BIPV manufacturer run continuously in the winter to ensure to specifications. which frequently conflicted with other comfort in the morning. Currently, the the office equipment and infra- structural supports. With this sys- recently entered bankruptcy, rais- applications on the users’ PCs and Integrated design makes value engineer- controls are modified to turn the fans that needed to be reinstalled whenever ing more difficult. Use of integrated design structure. The photovoltaic system tem, a support structure is unneces- ing concerns about the warranty on at 6 a.m. and off at 8 p.m. during operating systems were upgraded. principles on this project meant that sub- the workweek. IDeAs is investigating a is monitored including real-time sary, and each panel serves as both and longevity of a system that was This software control system was stituting lower cost components affected design using a CO sensor, occupancy ac voltage, current, and watts; a photovoltaic power source and a expected to last more than 20 years. 2 replaced with a wireless system that the performance of other systems. For sensors and a temperature sensor to relies on an Internet-accessible control example, using a lower cost glass did not real-time dc voltage, current, and roof membrane. This is an important consideration tailor the controls to operate the fans dashboard, effectively solving the soft- affect light levels but did increase solar only when they are needed. watts; and cumulative ac and dc A second BIPV system is incor- when designing systems using high- ware conflicts. heat gain, subsequently increasing the size • A large increase in the monitored • IDeAs’ cutting edge building-integrated of the HVAC system and PV arrays. energy generated. porated into the sunshade over the cost components that are expected energy use of the HVAC system was photovoltaic arrays proved to have a main entrance at the south side of to last for decades.

2 0 HIGH PERFORMING BUILDINGS Fall 2010 Fa l l 2 0 1 0 HIGH PERFORMING BUILDINGS 2 1 D55906asjl_811704.qxp 10/9/08 12:48 PM Page 1

Fresh [ a i r ] ideas for green buildings. ABOUT THE AUTHORS

David Kaneda, P.E., AIA, LEED AP, is the founder of IDeAs, an electrical design firm in San Jose, Calif. His expertise is in designing high efficiency lighting, day- lighting and electrical systems. Peter Rumsey, P.E., Fellow ASHRAE, is a Senior Fellow of the Rocky Mountain Institute and is owner and manag- Heck, we were green ing principal of Rumsey Engineers in Oakland, Calif. before green was cool. Scott Shell, FAIA and LEED AP, is a prin- For decades, Greenheck has focused on cipal and director of sustainability at EHDD Architecture in San Francisco. the environmental side of the building industry—developing reliable, energy- efficient products and IDeAs was able to align its design systems to promote with energy-saving equipment and occupants’ health and comfort. As one of the operations. first manufacturers of air It was also understood that the movement and control building would be a learning lab for equipment to join the students of sustainable design, so U.S. Green Building Council, the building monitoring system was Greenheck is ready to provide products emphasized and thought was even that support sustainable-design projects given to leaving certain areas of con- based on LEED certification guidelines. struction unfinished to give exposure We help engineers, architects, to infrastructure. In most other ways, contractors and owners succeed in however, IDeAs’ sustainable solu- their green initiatives, or any project. tions are applicable to small office buildings in any part of the world. Prepared to Support Going green? Go Greenheck—visit our Green Building Efforts This building demonstrates that Web site or contact our representative nearest you. a net zero goal can be achieved. Minimizing building loads first, then evolving the design with effi- Greenheck products improve energy efficiency and air quality (many contribute to LEED credits). cient systems and renewable energy Energy Recovery Indoor Air Quality Dampers Airflow Monitoring Kitchen Ventilation

© David Wakely sources is the path to take for zero A PV-equipped canopy mounted on the south façade generates electricity for the energy. The modest scope of this Summary building while providing a classic passive project demonstrates that zero solar shade as well as protection from rain The sunny, temperate microclimate in the winter. energy buildings are feasible on of the inland San Francisco Bay many scales, and they can be done Highly energy-efficient Controlling airflow in The Sure-Aire™ Airflow Reducing operating costs by Greenheck ERV products pro- commercial HVAC systems, Monitoring Station provides operating at peak efficiency, region was one inherent advantage loads, a slice of the total energy-use affordably and practically. vide fresh outdoor air our dampers meet ASHRAE flow verification to ensure our variable-volume kitchen of this project. Another was that the profile that is typically outside the to meet the ASHRAE 62 62 or ASHRAE 90 energy proper system balancing, system increases or ventilation rate standard, codes and International while improving air quality decreases exhaust and target occupants were experts in realm of architects and engineers. References while recovering energy from Energy Conservation Code and controlling industrial supply air volume to match achieving energy efficiency and fully In typical commercial projects, 1. U.S. Energy Information Administration. the exhaust air stream. low-leakage requirements. processes. the cooking load. EIA Commercial Buildings Energy committed to doing what it would designers have little control over Consumption Survey. Table C3A. take to achieve a net zero building. future tenants’ equipment choices Consumption and Gross Energy Intensity For example, IDeAs and Rumsey or eventual energy use. However, as for Sum of Major Fuels for All Buildings, Engineers carved away at plug the owner and building occupant, 2003. Office Building Energy Intensity: 92.9 kBtu/ft2. http://tinyurl.com/eia-doe.

HPB.hotims.com/33325-9 2 2 HIGH PERFORMING BUILDINGS Fall 2010 715.359.6171 • greenheck.com

Centrifugal & Vane Axial Fans Fans & Ventilators Energy Recovery Ventilators Make-up Air Units Kitchen Ventilation Systems Dampers Louvers Lab Exhaust Systems