Atco #070 R4.2 Flex Duct, 25′, Grey Jacket

ATCO #036 is an economical Class 1 Air Duct designed for indoor use as a supply and return air duct in residential and commercial low-to-medium pressure heating and air conditioning systems. It features R4.2 insulation and can be used as a complete air duct system and/or a branch duct connecting to mixing boxes, diffusers, light troffers, room inlets, or other terminal devices.