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Clothes Dryer Transition Duct
UL 2158A
1 Scope
1.1 These requirements apply to clothes dryer transition ducts intended for venting household and commercial clothes dryers.

1.2 The ducts covered by these requirements are intended to connect a clothes dryer to an existing permanent duct provided as a part of the building structure. The duct is intended to vent lint and humid air from drying clothes.