The ProFlex™ dryer transition duct is ideal for gas and electric dryer applications. This duct is UL2158A listed and marked for safe dryer venting and is constructed of heavy duty, fire resistant, 4 ply aluminum foil laminate that encapsulates a high density, corrosion resistant wire helix. This forms an air tight and easy to use air duct. This duct will not support combustion.
Per UL2158A only ducts 8 ft or less can be UL marked