UL 2158A

Standard for Clothes Dryer Transition Duct

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.


  • Edition Number: 1
  • Edition Date: 12/11/2013
  • Price Code: A
  • Type: ulstd
  • ANSI Approved: 12/11/2013
  • DOD Approved: