Specification History

SWS Version Created Specification ID Title Specification Objective Supporting Materials Rationale Status
Version 2020 08/14/2020 - 14:26 6.0101.1a Material selection

Select duct materials that have a flame spread no greater than 25

Select flexible ducts that are UL 181 listed or Air Diffusion Council approved

Select rigid ducts of 28 gauge or thicker

Select duct insulation with a flame spread/smoke development index of 25/50 or less when tested according to ASTM E84 or UL 723

Select durable, safe, and effective duct materials

 Black Line
Version 2020 08/14/2020 - 14:26 6.0101.1a Material selection

Select duct materials that have a flame spread no greater than 25

Select flexible ducts that are UL 181 listed or Air Diffusion Council approved

Select rigid ducts of 28 gauge or thicker

Select duct insulation with a flame spread/smoke development index of 25/50 or less when tested according to ASTM E84 or UL 723

Select durable, safe, and effective duct materials

 Black Line