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.
This revision of ANSI/UL 2158A dated April 6, 2023 includes changes in requirements to the Puncture Test; 13.1, 13.5 and Figure 13.1
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