Fabric Ducts and Diffusers

SECTION 23 37 00 FABRIC DUCTS AND DIFFUSERS

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1 GENERAL

1.1 SECTION INCLUDES

1.1.1 Fabric air dispersion systems including: 1.1.1.1 Fabric ducts and diffusers. 1.1.1.2 Hanger supports, suspension, and mounting hardware. 1.1.1.3 Accessories.

1.2 RELATED SECTIONS

1.2.1 Section 23 74 33 - Dedicated Outdoor-Air Units.

1.2.2 Section 23 30 00 - HVAC Air Distribution.

1.3 REFERENCES

1.3.1 International Organization for Standardization (IS0): 1.3.1.1 ISO 9001 - Quality Management Systems. 1.3.1.2 ISO 13934-1 - Textiles, Tensile Properties of Fabrics. 1.3.1.3 ISO 14644-1 - Cleanrooms and Associated Controlled Environments. 1.3.1.4 ISO 14001 - Environmentally Friendly Production Methods. 1.3.1.5 ISO 20645 - Textile Fabrics, Determination of Antibacterial Activity.

1.3.2 Underwriters Laboratories (UL): 1.3.2.1 UL723 - Standard Test for Surface Burning Characteristics of Building Materials. 1.3.2.2 UL 2518 - Outline Investigation for Air Dispersion System Materials.

1.4 SUBMITTALS 23 37 00-1 1.4.1 Submit under provisions of Section 01 30 00 - Administrative Requirements.

1.4.2 Product Data: Manufacturer's data sheets on each product to be used, including: 1.4.2.1 Manufacturer's performance data for each fabric duct and diffuser system, including airflow rate, inlet velocity, static pressure and exit velocity out of duct system represented and verified by graphical air distribution profile or CFD analysis. 1.4.2.2 Preparation instructions and recommendations. 1.4.2.3 Storage and handling requirements and recommendations. 1.4.2.4 Installation methods.

1.4.3 Test Results and Product Documentation: 1.4.3.1 ISO 9001 certificate from production facility. 1.4.3.2 ISO 14001 certificate from production facility. 1.4.3.3 UL file number under which product is Classified by Underwriter's Laboratories to UL723 (NFPA 90), ICC AC167 and UL 2518. 1.4.3.4 Antimicrobial/antibacterial standard ISO 20645. 1.4.3.5 Non-shedding material standard ISO 14644-1. 1.4.3.6 Fabric strength ISO 13934-1. 1.4.3.7 Anti Static properties.

1.4.4 Shop Drawings: Submit manufacturer's drawings indicating size and placement of distribution method, mounting and installation instructions

1.4.5 Verification Samples: Provide two full size units for each product to be installed, minimum length 36 inch (1 meter) for projects exceeding 100,000USD sales price or for unique or prototype products.

1.4.6 Closeout Submittals: 1.4.6.1 Maintenance data. 1.4.6.2 Warranty. 1.4.6.3 Sustainable air duct information such as LEED v4 contribution category eligibility, Environmental Product Declaration (EPD), Life Cycle Analysis (LCA), Health Product Declaration and/or Living Building Challenge Red List Compliance. 1.4.6.4 Performance data including pressure losses and graphical air distribution profile or Computational Fluid Dynamics (CFD).

1.5 QUALITY ASSURANCE

1.5.1 Manufacturer Qualifications: ISO 9001 registered.

23 37 00-2 1.5.2 Installer Qualifications: 1.5.2.1 Manufacturer certified installer with minimum 2 years experience installing similar products. 1.5.2.2 Close collaboration and approval of installation from the manufacturer may be permitted on a case-by-case basis. Contact the manufacturer for more information.

1.5.3 Products: 1.5.3.1 Labeled with the logo and classification marking of Underwriter's Laboratories (UL), order number and manufacture date. 1.5.3.2 Antibacterial/antimicrobial agent applied from factory meeting test standard ISO 20645. 1.5.3.3 Products must be classified in accordance with the 25/50 flame spread/smoke development requirements of UL723 based on NFPA 90A - 1993, "Installation of Air Conditioning and Ventilating Systems", and in accordance with ICC Evaluation Service AC167 and UL 2518. 1.5.3.4 Fabrics shall meet minimum criteria for use in ISO Class 4 application (Clean room, non shedding material) as defined by ISO 14644-1. 1.5.3.5 Textile Material shall meet minimum tensile strength warp1880/ weft1090N as defined by ISO 136934-1. 1.5.3.6 Textile Material must have documented ability to dissipate static electricity (anti- static properties) for use in volatile / explosion protected production facilities, sensitive electronic equipment, server rooms, and data storage. 1.5.3.7 Fabric Duct air dispersion system must be designed in software which documents, calculates and provides: pressure loss, inlet velocity, turbulent condition warnings, throw capability, entrainment, deflection, flow models, sizing, installation methods, sound generated graphical air flow profile or CFD analysis and temperature corrections. 1.5.3.8 Submit third party certification of recycled content.

1.6 PRE-INSTALLATION MEETINGS

1.6.1 Convene at the project site minimum two weeks prior to starting work of this section. 1.6.1.1 Prior to or during the pre-installation meeting, contact the manufacturer via phone, email, or web conference to answer project specific questions and concerns.

1.7 DELIVERY, STORAGE, AND HANDLING

1.7.1 Protect duct systems from damage during shipping, storage, and handling in accordance with manufacturer's recommendation.

1.7.2 Deliver and store products in manufacturer's unopened packaging bearing the brand name and manufacturer's identification until ready for installation.

1.7.3 Store products inside and protect from weather. 23 37 00-3 1.8 PROJECT CONDITIONS

1.8.1 Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's recommended limits. 1.8.1.1 Do not use fabric duct air diffusers in concealed locations unless pressurized plenum space intended for air distribution. 1.8.1.2 Fabric diffusers shall be designed from minimum 0.25 inch (6.35 mm) water gage to 3 inch (76.2 mm) as the maximum 0.5 inch (12 mm) standard. 1.8.1.3 Design temperatures between -75 deg to +230 deg F (-59 deg to 110 deg C). 1.8.1.4 Manufacturer shall approve all technical design parameters.

1.8.2 Air Handler Requirements: 1.8.2.1 Provide adequate pre-filtering (MINIMUM EU3/MERV 5) prior to the fabric duct system, all according to manufacturer's specifications. 1.8.2.2 Provide fans supplying constant static pressure. If Variable Air Volume (VAV), minimum and maximum airflow volume and static pressure must be disclosed for design purposes. 1.8.2.3 If hold open option is not specified, the manufacturer recommends using a soft starter, Variable Speed Drive (VSD), Variable Frequency Drive (VFD), motorized damper, stage multiple supply fans, or providing a way of introducing the total air volume slowly to the duct. VFD, VSD's and motorized dampers should be programed for a 30 second ramp up time.

1.9 SEQUENCING

1.9.1 Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.

1.10 WARRANTY

1.10.1 Provide manufacturers standard non-prorated warranty including: 1.10.1.1 Fabric Duct System: 10 year warranty. 1.10.1.2 Full Length Perimeter Fabric Tensioning System: 20 year warranty.

2 PRODUCTS

2.1 MANUFACTURERS

2.1.1 Acceptable Manufacturer: Prihoda North America, which is located at: 6925 Cottage Hill; Mobile, AL 36695; Toll Free Tel: 855-PRIHODA (774-4632) ; Tel: 855-774-4632; Fax: 855-774- 4632; Email: request info ([email protected] ); Web: www.prihoda.com

2.1.2 23 37 00-4 Substitutions: Not permitted.

2.1.3 Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.

2.2 FABRIC DUCTS

2.2.1 Fabric Ducting and Diffusers: Provide Prihoda products to serve as general ducting and air distribution devices or return devices at the same time. Prihoda Fabric Air Dispersion System shall be constructed of PMI fabric, a woven fire retardant and permeable fabric complying with the following characteristics: 2.2.1.1 Fabric: 100% Flame Retardant Polyester treated with an antimicrobial agent applied from factory meeting test standard ISO 20645. 2.2.1.1.1 Material must include recycled content. 2.2.1.1.2 Material must be comprised of 100% Post-consumer recycled content polyester with Environmental Product Declaration based on a Life Cycle Analysis verified by a third party such as SCS Global Services. 2.2.1.2 Application: 2.2.1.2.1 Positive pressure fabric ducting and diffusers. 2.2.1.2.2 Negative pressure ducting for exhaust or returning air to units from spaces being served. 2.2.1.2.2.1 Both positive and negative pressure applications as shown on the Drawings. 2.2.1.3 Shape: 2.2.1.3.1.1 Circular. 2.2.1.3.1.2 Half-Round. 2.2.1.3.1.3 Quarter-Round. 2.2.1.3.1.4 Segment. 2.2.1.3.1.5 Sector. 2.2.1.3.2 Square. 2.2.1.3.3 Triangular. 2.2.1.4 Weight: Minimum 6.5 ounces per square yard (220 grams per square meter) per ASTM D3776. 2.2.1.5 Strength: Warp 1880 / Weft 1090N per ISO13934. 2.2.1.6 Shrinkage: Maximum 0.5 percent per ISO 6330-2000. 2.2.1.7 Temperature Range: -75 deg to +230 deg F (-59 deg to 110 deg C). 2.2.1.8 Permeability: 2 cfm or less (to prevent condensation only). 2.2.1.9 Permeability: Non-permeable. 23 37 00-5 2.2.1.10 Fire Retardant: Must meet the requirements in NFPA 90-A, ICC AC-167 and UL2518. 2.2.1.11 Colors: 2.2.1.11.1 White (RAL 9016). 2.2.1.11.2 Light Grey (Pantone 420/RAL 7035). 2.2.1.11.3 Dark Grey (Pantone 424/RAL 7037). 2.2.1.11.4 Blue (Pantone 7462/RAL 5005). 2.2.1.11.5 Yellow (Pantone 135/RAL 1017). 2.2.1.11.6 Light Blue (pantone 2915/RAL 5012). 2.2.1.11.7 Green (pantone 340/ RAL7037). 2.2.1.11.8 Black (Pantone 419/RAL9017). 2.2.1.11.9 Red (Pantone187/RAL 3001). 2.2.1.11.10 Custom color to match ______PANTONE or RAL _____ number. 2.2.1.11.11 Custom Printing: Provide logo requirements or exact text, font, size, location and quantity.

2.3 DUCT FABRlCATlON

2.3.1 Air Dispersion Method: 2.3.1.1 Micro-Perforation (low velocity, laminar, low/no throw): Woven, high porosity fabrics not accepted due to additional maintenance (washing) required. EU3/Merv 5 or better filtration required. 2.3.1.1.1.1 Uniform microperforation (cooling, isothermal/makeup air only). 2.3.1.1.1.2 Directional (short throw heating, cooling, ventilating). 2.3.1.2 Laser Cut Perforations/holes (comfort, medium, and long throw): 2.3.1.2.1.1 Diameter: ______. 2.3.1.2.1.2 Location, number and size determined by engineer's design requirements. 2.3.1.3 Small conical/Venturi shaped nozzles (Medium to long throw): 2.3.1.3.1.1 0.80 inch (20mm) diameter. 2.3.1.3.1.2 1.1 inch (30mm) diameter. 2.3.1.3.1.3 1.6 inch (40mm) diameter. 2.3.1.3.1.4 Location, number and size determined by engineer's design requirements. 2.3.1.4 Conical Textile Nozzles (long to very long throw, high velocity): 23 37 00-6 2.3.1.4.1.1 3 inch (76 mm) minimum diameter, spacing as determined by design. 2.3.1.4.2 Smaller or plastic nozzles not accepted as equal due to fire/smoke, throw and sound requirements. 2.3.1.4.3 Each nozzle must include internal adjustable damper. 2.3.1.4.4 Location, number and size determined by engineer's design requirements.

2.3.2 Provide system in sections optimized for maintenance, typically 16 foot (5 meter) maximum for diameters over 32 inch (812 mm), connected by zippers. Zippers must provide closure completely around the circumference to prevent air leakage.

2.3.3 Each section shall have a unique tag including information about: manufacturers order number, position, diameter of section, length of section, maintenance instruction, code compliance and contact details for spare parts.

2.3.4 Endcaps shall be zippered or sewn to the last duct section as recommended by the manufacturer.

2.3.5 Equalizers (flow correctors) or dampers shall be included as shown on plans or schedules.

2.3.6 Standard cable installations shall include hooks every 20 inches (500 mm) which clip to horizontal cable and can be utilized with track/profile suspension.

2.3.7 Track/profile installations shall have continuous fabric strip which slides into track giving continuous support.

2.3.8 Include SS inlet clamp for securing to metal outlet connection point.

2.4 HANGER SUPPORTS

2.4.1 Single Cable/Wire Suspension: One row cable system located 1.25 inch (31.75 mm) above 12 o'clock of textile duct system. Fabric Duct system to be attached to hardware using one single row of plastic hooks located 12 o'clock spaced 20 inches (500 mm). Hardware to include cable, cable clamps, turnbuckles, and tie down straps as required. Support hangers spaced at 16 feet (5 meters).

2.4.2 Double Cable/Wire Suspension: Two row cable system with hooks located at 3 and 9 o'clock on Fabric duct system. Fabric diffuser system to be attached to wire / cable using double row of plastic hooks located 3 and 9 o'clock spaced 20 inches (500mm). Hardware to include cable, cable clamps, turnbuckles, and tie down straps as required. Support hangers spaced at 16 feet (5 meters).

2.4.3 Triple Cable/Wire Suspension: Fabric Duct system to be attached to cable/wire using three rows of plastic hooks located 3, 12 and 9 o'clock spaced 20 inches (500 mm). Hardware to include cable, cable clamps, turnbuckles, and tie down straps as required. Support hangers spaced at 16 feet (5 meters).

2.4.4 Single Aluminum Track Profile: Fabric Duct system to be attached to track profile using 23 37 00-7 continuous reinforced fabric strip or alternatively plastic gliders located at 12 o'clock spaced 20 inches (500 mm) can be utilized if Engineer and Architect approves of the appearance and potential increased sound criteria. 2.4.4.1 Wire/cable hangers spaced at 6.6 feet (2 meters). 2.4.4.2 Wire/cable hangers spaced at 13 feet (4 meters) with reinforced track.

2.4.5 Double Aluminum Track Profile: Fabric Duct system to be attached to track profile using continuous reinforced fabric strips or alternatively plastic gliders located at 3 and 9 o'clock spaced 20 inches (500 mm) can be utilized if Engineer and Architect approves of the appearance and potential increased sound criteria. 2.4.5.1 Wire/cable hangers spaced at 6.6 feet (2 meters). 2.4.5.2 Wire/cable hangers spaced at 13 feet (4 meters) with reinforced track.

2.4.6 Triple Aluminum Track Profile: Fabric Duct system to be attached to track profile using continuous reinforced fabric strip or alternatively plastic gliders located at 3,12, and 9 o'clock spaced 20 inches (500 mm) can be utilized if Engineer and Architect approves of the appearance and potential increased sound criteria. 2.4.6.1 Wire/cable hangers spaced at 6.6 feet (2 meters). 2.4.6.2 Wire/cable hangers spaced at 13 feet (4 meters) with reinforced track.

2.5 ACCESSORlES

2.5.1 Duct Insulation: Unwoven 2 inch (52 mm) polyester layer sewn between inner wall (light weight material) and external wall of the duct (typically medium weight). Sewing decreases insulation thickness by approximately 50 percent

2.5.2 Defrost Damper for Walk-In Coolers and Freezers.

2.5.3 Anti-Static Design including: 2.5.3.1 Conductive carbon fibers woven into the material. 2.5.3.2 Conductive strip sewn on the length of the diffuse. 2.5.3.3 Zippers with metal joints. 2.5.3.4 Grounding points at the ends of the diffusers.

2.5.4 Hanging Hardware: 2.5.4.1 Plastic coated stainless steel sable, all other components Stainless Steel. 2.5.4.2 Galvanized cable with gripple (Loop, Stud, or Toggle). 2.5.4.3 Plastic coated galvanized cable, all other components Galvanized Steel.

2.5.5 Reinforcing Options (Hold open): 2.5.5.1 Internal Rings: Aluminum or stainless steel. 23 37 00-8 2.5.5.2 Internal Rings: Heat resistant plastic. 2.5.5.3 Internal, removable Aluminum Arcs: Placed in roof of duct at factory from 3 to 9 to hold duct open with no or low airflow/pressure. 2.5.5.4 Tensioning device to remove wrinkles/creases.

2.5.6 Adjustable lengths.

2.5.7 Adjustable arches and elbows.

2.5.8 Adjustable perforations.

2.5.9 Moveable inlet adapters.

2.5.10 Lantern air diffusers.

2.5.11 Equalizers.

2.5.12 Pocket deflectors.

2.5.13 Diffusers for high load cooling.

2.5.14 Anti-deflectors.

3 EXECUTION

3.1 EXAMINATION

3.1.1 Do not begin installation until substrates have been properly prepared.

3.1.2 If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.

3.1.3 Do not continue any installation until unsatisfactory conditions have been corrected.

3.2 PREPARATION

3.2.1 Clean surfaces thoroughly prior to installation. 3.2.1.1 Clean air handling unit and other ductwork prior to fabric duct system as it is installed. 3.2.1.2 Make sure that all dust and debris from installation is removed from the air handling unit and other ductwork before connecting the fabric duct system. 3.2.1.3 If the fabric duct system becomes soiled during the installation, it shall be removed 23 37 00-9 and cleaned following the manufacturers cleaning instructions.

3.3 INSTALLATION

3.3.1 Install in accordance with manufacturer's instructions. 3.3.1.1 Examine area and conditions under which fabric duct system is to be installed. 3.3.1.2 Install chosen suspension system in accordance with the requirements of the manufacturer. Installation instructions to be provided by the manufacturer with product. 3.3.1.3 Coordinate layout with suspended ceiling, lighting layouts, and similar finished work.

3.4 PROTECTION

3.4.1 Protect installed products until completion of project.

3.4.2 Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION

23 37 00-10