Mechanical · M-GPAHK

Ducted Grille Connection with Flexible Ductwork

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A ceiling grille connects to a main duct using a flexible duct run limited to a maximum length of 5 feet, supported by hangers installed per SMACNA standards tied to the structure above. The flexible duct attaches using a drawband with sealant, UL approved tape, or a factory metal collar screwed and sealed with duct sealant. A manufacturer-installed balance damper with a flag damper and ribbon is included where applicable. For T-bar ceiling applications, diffusers are positively attached using lay-in support clips or by mechanical fastening to the T-bar runner.

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