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8" X 25' Insulated Flex Duct Strong polyester film laminated and encapsulating a heavy, corrosion resistant steel wire helix, forms the inner core and supports a thick blanket of fiberglass insulation over a fiberglass scrim. The outer vapor barrier is a jacket of durable grey polyethylene. Designed for low to medium pressure systems. INSULATION: VAPOR BARRIER PERMEANCE: TEMPERATURE RANGE: EXTERIOR FACING AND VAPOR BARRIER: *we recommend that you check with the local code body having jurisdiction in your area to determine applicable codes.
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