Flexible insulated duct is available for 4" to 12" duct and up to 25' in length. UL listed 181 class 1 air duct, wrapped with R4.2 insulation and black polyethylene cover. Ideal for long duct run applications for HVAC, bathroom, and general venting applications. Features: Type: Insulated Duct. For long duct run applications - HVAC. Provide all the accessories needed to install a residential fan. Specifications: Length: 25'.
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