UL181, NFPA 90A and 90B, IMC, IRC, UMC 10-1 (ICC ES Report No. ESR-1268), HUD 515-2.1, Cities of Chicago, New York, San Francisco, County of Dade (Florida), California State Fire Marshall
Insulated Flexible Duct Insulation Value R 4.2 UPC Number 30 Flexible Duct Inside Dia 8 in Flexible Duct Wall Thickness 1 1/4 in Vapor Transmission 0.05 Material Polyester Flexible Duct Length 25 ft Max Air Flow 5 000 fpm Max Pressure 6 in WC Max Temp 180 Degrees F Low Temp Deg -20 Degrees F For Use With Heating and Cooling Systems