Specification History

SWS Version Created Specification ID Title Specification Objective Supporting Materials Rationale Status
Version 2025 25/09/2023 - 11:24 6.0202.1a Duct selection

The transition ducts (flexible or rigid) used to connect the dryer to the primary exhaust duct system shall be UL 2158A approved and less than 8 feet in total length with no joints. 

Select primary dryer ducting material that is 28 gauge metal with a smooth interior

Smooth airflow that does not collect lint

 The committee determined the reference to 28 gauge shall remain because the IRC requires 28 gauge or thicker for all dryer vents (M1502.4.1). The committee determined a need to clarify that transition ducts connect the dryer to the primary exhaust duct. Red Line
Version 2020 14/08/2020 - 14:27 6.0202.1a Duct selection

Select dryer transition ducting materials that are UL 2158A approved and less than 8 feet in total length with no joints

Select primary dryer ducting material that is 28 gauge metal with a smooth interior

Smooth airflow that does not collect lint

 Black Line
Version 2020 14/08/2020 - 14:27 6.0202.1a Duct selection

Select dryer transition ducting materials that are UL 2158A approved and less than 8 feet in total length with no joints

Select primary dryer ducting material that is 28 gauge metal with a smooth interior

Smooth airflow that does not collect lint

 Black Line