Chimney 68410 4 in. x 36 in. Type B Gas Vent

Type B Gas Vent designed to the demands of the common category I appliance installation. Engineered to heat up rapidly and remain hot during the appliance operation to allow for minimal condensation. An innovative system for a lock tight connection called DuraLock. Use with natural gas and liquified propane (LP) category I appliances with a draft hood Adds 34.5 in. L to a 4 in. Dia installation Aluminum inner wall and galvalume outer wall construction that features an industry leading twist-lock design 1 in. clearance to combustibles in a single or multi-family dwelling applications