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DocuSign Envelope ID: E9612703-F25B-492D-9C8C-EC3F9728ECE6 <br /> accordance with AMCA Standard 500 and shall illustrate pressure drops for all sizes of dampers <br /> required at all anticipated air flow rates. Fire dampers shall be equipped for vertical or horizontal <br /> installation as required by the location shown. Fire dampers located in supply ducts to be Type "B" <br /> (100%free area). Fire dampers located in return and exhaust ducts to be Type "A". Fire dampers <br /> shall be installed in wall and floor openings utilizing steel sleeves, angles, other materials, and <br /> practices required to provide an installation according to NFPA 90A and equivalent to that utilized <br /> by the manufacturer when dampers were tested at UL. Installation shall be in accordance with the <br /> damper manufacturer's U.L approved instructions. During installation,personnel installing dampers <br /> shall have manufacturer's installation instructions in their possession. Fire dampers shall be as <br /> manufactured by Ruskin,Prefco, Safe Air,National Controlled Air,United Air,or Nailor,and must <br /> be U.L. labeled. <br /> Provide access doors for inspection and resetting as applicable when duct dampers are installed <br /> and/or concealed. Access doors to be by Milcor, with fire rating appropriate to the wall/floor <br /> assembly rating. Size to be as required to provide adequate access and doors to be compatible with <br /> architectural finish adjacent. <br /> 15770 GRILLES AND DIFFUSERS: <br /> Furnish and install ceiling diffusers, supply and return air and exhaust grilles and registers as noted <br /> on plans and in schedules. Provide all volume control and adjusting devices as called for in <br /> schedules,all supply diffusers shall be equipped with volume controls. Grills,registers and diffusers <br /> shall be as manufactured by Metal Aire Industries, Carnes, Titus, or EH Price, or approved equal. <br /> Round neck adapters are to be provided where required. <br /> Unit offered as substitutes to those used in the layout of the system shall show suitable air <br /> distribution and performance. Final approval will be reserved,pending satisfactory performance on <br /> job. <br /> Ceiling diffusers to be lay-in or surface mounted as ceiling type dictates. Finish to be off white <br /> baked enamel. <br /> 15810 DUCT INSULATION <br /> All supply, outside air, and return ducts to be insulated unless noted otherwise on drawings. All <br /> ductwork routed in unconditioned spaces within the building envelope shall have 2" blanket <br /> insulation; or if outside the building envelope—3"blanket insulation, as outlined below. <br /> Insulation required for conditioned air ducts shall be as listed below: <br /> A. DUCTWORK: <br /> All rectangular supply,return, and outside air ducts outside the building envelope (i.e. in the attic) <br /> shall be wrapped with 3" ductwrap,per the requirements of NC Energy Code. <br /> 15H-29 <br />