Mechanical · M-W7N7D

Diffuser Grille or Register Flex Connection Detail

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Flexible ductwork connects to a ceiling diffuser, register, or grille with a maximum length of five feet, supported by hangers per Sheet Metal and Air Conditioning Contractors' National Association standards attached to the structure above. A drawband with sealant or Underwriters Laboratories approved tape, or a factory metal collar screwed and sealed to the duct, secures the flex duct. A manufacturer-installed balance damper is included where applicable. For T-bar ceiling applications where the assembly weighs less than twenty pounds, diffusers are positively attached by either support clips on two opposite sides or sheet metal pan head screws fastened to the T-bar runner on two sides.

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