Dura Flex Aluminum is for use as air intake only. Aluminum Flex liner available in 25 ft., 35 ft., and 50 ft. flex lengths. Constructed of single-wall (1-ply) aluminum.
- Flexible aluminum relining for masonry chimney
- Use with natural gas or liquid propane category 1, draft hood equipped appliances, and appliances tested and listed to use type B gas vent
- Applications include natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating appliances
- 0 in. clearance to masonry
- Available in 3 in thru 8 in.
- Limited lifetime warranty
- Listed to UL 1777 and ULC S696