DuraVent 3DFA-35 Duraflex 3 x 35′ Aluminum Chimney Liner

Use with Category I gas-burning appliances with draft hood. UL 1777 aluminum liner. Flex lengths. An economical venting system used for relining masonry chimney for natural gas or liquid propane category I, draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent for a wide range of applications, including: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications.