Description
The Lambro 4 in x 25 ft. UL 181 air connector is ideal for bath fan exhaust and other general venting applications that require moist air and humidity from exiting the home. This duct is made from multiple layers of aluminum / polyester material bonded with a fire retardant adhesive with a maximum operating temperature of 257 deg. F. The duct is supported by a galvanized wire helix spiral frame to prevent collapsing. This duct cannot be installed in lengths greater than 14 ft. as per the UL 181 class 1 guidelines and can be cut to length as needed. Check local building codes prior to installation.
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