UL 2158A:2021 PDF Download

The UL 2158A:2021 standard is applicable to transition ducts used for venting both household and commercial clothes dryers. These requirements specifically pertain to the ducts that connect the dryer to an existing permanent duct within the building structure. The purpose of these ducts is to facilitate the efficient removal of lint and humid air generated during the drying process.

This standard ensures that clothes dryer transition ducts comply with specified safety and performance requirements. By adhering to the UL 2158A:2021 standard, manufacturers can ensure their products meet the necessary criteria for effective venting and prevent potential safety hazards associated with dryer venting. This includes the prevention of lint buildup and the reduction of fire risks caused by inadequate ventilation.