Product HighlightsFlex-Vent KM is a thermally insulated, fully lined, UL 181 Class 1 flexible air duct designed for low to medium pressure cooling and heating HVAC systems. It can be used in either supply or return sections and provides economical means for handling misalignment between systems components and ducting around obstacles where fabricated and fitted ducts are difficult and costly to use. It is equally suitable for new jobs or retrofit work and is especially useful whenmaking system extensions or for changing conditioned zones, now or in the future. Compliance to NFPA Standards allows you to install lengths longer than the 14' limitation applying to connectors. It is a highly efficient part of the total duct system because the smooth liner, the ample insulation and tough outer vapor barrier provide good airflow, thermal insulation and a double air seal.
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Weight 47.50 Pounds Length 24.25 Inches Width 24.25 Inches Height 24.25 Inches Country of Origin USA Brand Thermaflex R-Value R6 Jacket Material Laminated Polyester Film Vapor Transmission 0.1 Application Air Distribution Certifications GreenGuard Color Pink, Silver Comments/Notes UL Listed - USA & CAN Composition Fiberglass Core Material Laminated Polyester Film Fire Rating Meets UL 181 & NFPA 90A-90B Fire Codes Inside Diameter 20" Insulated Yes Maximum Air Flow 5000 FPM Maximum Pressure Positive = 10" (4-16" ID) 6" (18-20"ID) Negative= 1/2" (4-20" ID) Maximum Temperature 250°F (121.1°C) Operating Temperature -20°F to 250°F (-28.8°C to 121.1°C) Pressure Rating WG - Positive 10 inches (4"-16" ID), 6 inches (18"-20" ID) - Negative: 1/2 inch (4"-20" ID) Size 20" x 25' Warranty Offered Yes Compliance NFPA 90 A and 90 B UL Listed Yes UL Recognized Yes Tier KM
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