Red Line
October 11, 2021
UL Red Line
Published Date: October 11, 2021
Last Revision: April 06, 2023
ANSI Approved: October 11, 2021
Scope
02158a-000000-0000001 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.