Applications
DuraFlex AL (DFAL) aluminum flexible relining for masonry chimney. Use with natural gas or liquid propane category I, 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 applications.

Materials and Construction
Single-wall .010" aluminum (2-ply of .005").

Clearances
0" clearance to masonry.

Diameters
3", 4", 5", 5 ½", 6", 7", and 8".

Listings
Listed to UL 1777 and ULC S635.