Applications: Installed in a masonry chimney venting Wood, Pellet, Gas, Oil, and Coal burning appliances

Our Rock-Flex Deluxe Smooth Wall 316 stainless steel chimney liner is gaining in popularity for gas and oil appliances due to its superior flexibility and increased BTU capacity. Its smooth interior design allows for more airflow, adding back up to 20% drag factor that's lost in traditional corrugated liners. Our Rock-Flex Smooth Wall liner can vent up to 20% more BTU's for gas burning appliances and 15% more gallons per hour (GPH) for oil burning appliances. UL listed in the USA and Canada and since it's made of 7 ply 316 stainless steel and 2 inner linings (.013 total thickness), it's great for any application including wood, pellet, gas, oil, and coal burning appliances. You can use it with all of our round liner components. 100% stainless steel and 100% made in the USA with the highest quality stainless steel.

Sizes that cannot be coiled into one length include a quick connector to couple the flex liner sections together (9" through 12" diameter x 30 ft through 50 ft)

Looking for a Chimney Liner Kit? We've got those too! Most installations require a flue liner kit.

Note: Because of its special construction, smooth wall flexible liner cannot be ovalized or shaped in any way. If you need a shaped liner, please see our oval, square, or rectangle chimney liner kits.