Additional InformationUL 181 Class 1, NFPA 90A, NFPA 90B, IMC Certified, IRC Certified, UMC 10-1 (ICC ES Report No. ESR-1268), HUD Certified, ADS Certified, Greenguard® Certified
Marketing InformationAtco 040, 046 and 048 are UL 181, class 1 air ducts and are manufactured with a black, heavy-duty polyethylene jacket which complies with the HUD requirements for outdoor mobile home or modular home installation. The UPC 040, 046 and 048's inner core is airtight and is designed for low to medium operating pressures in HVAC systems.