The Heavy Flex 304L liners are recommended when venting wood or pellet burning appliances.
The 12" Iron Flex Chimney Liner (304L) is backed by our Lifetime warranty. Follow the simple maintenance requirements and this chimney liner will be the last one you install. Using our chimney liners will increase the value of your home as the warranty will transfer to the next occupants.
The 12" Iron Flex Chimney Liner (304L) comes as a single coil ready to be unwrapped and installed. Heavy Flex Liner provides the strength of rigid liner but while maintaining flexibility. This liner is so strong you could drive a truck over it! Heavy Flex Liner is designed to not just withstand the harsh conditions in the chimney but to also handle vigorous cleaning with metal bristle chimney brushes. Other liners can be punctured if a metal brush is used.