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Installation Supplies, Flexible Ductwork, Insulated Flex Duct
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 black polyethylene. Designed for low to medium pressure systems. CODES/STANDARDS: Listed and labeled by Underwriters' Laboratories, Inc., as a Class 1 Air Duct, Standard 181. It complies with the latest NFPA Bulletins 90A and 90B. Meets FHA and other U.S. government agency standards. Flame spread: not over 25. Smoke developed: not over 50.* INSULATION: R-4.2 VAPOR BARRIER PERMEANCE: .1 Perm per ASTM. Method E96, Procedure A. TEMPERATURE RANGE: - 20° F to 250° F. EXTERIOR FACING AND VAPOR BARRIER: Polyolefin film, flame resistant *we recommend that you check with the local code body having jurisdiction in your area to determine applicable codes.
The insulated flex hose was ideal to run through the attic of my 1897 home. The installation was simple and it did just what I expected it to do. [...]