The Type B designation is assigned to gas venting systems that meet the safety requirements of Underwriters Laboratories, Inc. The Amerivent all-metal, double-wall gas vent is listed as Type B by Underwriters Laboratories, Inc. and is approved for such residential and commercial applications as Category 1 water heaters, boilers, furnaces, space heaters or wall heaters. UL-approved Type B gas vent products form a continuous passageway from an approved gas appliance to the termination of the vent above the roof of the structure.
Manufacturer: AMERICAN METAL
Model Number: 4E4
UPC: 095029400856
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