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DocuSign Envelope ID: 9826C043- 4C32- 49CD- A4CC- DC28ABAB7CE7 <br />PERFORMANCE <br />Direction: Forward Flow ( +) <br />Dynamic Insertion Loss (dB) <br />3. Generated Noise <br />ix <br />ca <br />m � <br />Generated (Noise L . (dB; 10-12 Watts) <br />r <br />FPM Static Pressure Drop 0 $ <br />1500 0.03 iA�g p a <br />750 0.01 iwg 7 v <br />SECTION 239116 — NON -METAL DUCTS <br />Octane Band Center Frequency (Hz) <br />63 <br />125 <br />250 <br />500 <br />1000 <br />2000 <br />4000 <br />8000 <br />15()o <br />750 <br />Octave Band Center Frequency (Hz) <br />D. TEXTILE SYSTEM FABRICATION REQUIREMENTS: <br />1. Textile system to be constructed in modular lengths (zippered) with proper radial securing <br />clips (inlets, endcaps, and mid - sections) and top access zippers for vertical cable safety at- <br />tachment. <br />2. Integrated air dispersion shall be specified and approved by manufacturer. (select only those <br />that apply) <br />a. Linear Vents (Note: Utilize Linear Vents unless notes otherwise on drawings) <br />1. Air dispersion accomplished by linear vent and permeable fabric. Linear <br />vents must be sized in 1 CFM per linear foot increments (based on .5" SP), <br />starting a 1 CFM through 90 CFM per linear foot. Linear vent is to consist <br />of an array of open orifices rather than a mesh style vent to reduce mainte- <br />nance requirements of mesh style vents. Linear vents should also be de- <br />signed to minimize dusting on fabric surface. <br />2. Size of vent openings and location of linear vents to be specified and ap- <br />proved by manufacturer. <br />b. Orifices — 2" & 3" SG's (Sewn -in Grommets) <br />1. Air dispersion and extended throws are accomplished by reinforced orifices <br />and permeable fabric. Reinforced orifices are to be installed to keep the in- <br />tegrity of opening and withstand laundry processes. <br />2. Diameter, quantity, and location of reinforced orifices to be specified and <br />approved by manufacturer. <br />c. Fixed Nozzles <br />1. Air dispersion accomplished by using conical aerodynamic nozzles and <br />permeable fabric. Diameter of nozzles height to be minimum' /2 ". Due to <br />exact requirements of throw and maximum level of noise alternative flow <br />models are not acceptable. <br />2. Color of nozzles must match color of fabric. Unless otherwise specifically <br />mentioned on drawings or otherwise in this specification, suppliers standard <br />table is used for selection of color. <br />3. Location and number of nozzles to be specified and approved by <br />manufacturer. <br />d. Adjustable Nozzles <br />1. Air dispersion accomplished by adjustable ball nozzles and permeable fab- <br />ric. Adjustable ball nozzles to have multiaxial rotation to redirect airflow to <br />desired area. Adjustable ball nozzles are able to completely close off air- <br />flow without adding caps or plugs. Adjustable ball nozzles should lock into <br />place once set, preventing constant adjustment. Adjustable ball nozzle <br />should have inset design to be a condensation resistant product. <br />2. Colors of adjustable nozzles available are white and black. With white ma- <br />terial receiving white adjustable nozzles and all other material colors receiv- <br />ing black adjustable nozzles unless otherwise specifically mentioned on <br />drawings or otherwise in the specification. <br />3. Quantity and location of adjustable ball nozzles to be specified and ap- <br />proved by manufacturer. <br />Reece, Noland & McElrath, Inc. 239116-3 Orange County Board of Elections <br />Orange Co., NC 05/04/18 <br />