How to Buy Chimney Flue Liners

According to the Chimney Safety Institute of America, building safety codes in most states require that when using a chimney flue to vent heating appliances, a flue liner must be installed. Liners help create the proper draft for the appliance, help maintain the integrity of the chimney and help prevent carbon monoxide from entering living spaces through cracks in the chimney wall. Liners also reduce the chance of a chimney fire by preventing heat and sparks from entering the living space and from the liner's smooth inner lining of flue liners reducing creosote buildup. Liners come in either flexible or rigid stainless steel and may require additional components to fit.

Rigid
- Rigid chimney flue liners are made of 22- to 24-gauge stainless steel. Rigid liners are bought in sections of anywhere between 1 and 4 feet in length and 5 to 10 inches in diameter.
Flexible
- For chimneys that are not straight, flexible liners accommodate for bends in the chimney structure. Flexible chimney liners are made of stainless steel and typically have smooth interior walls to prevent creosote buildup.
Other Components
- Both rigid and flexible flue liners need additional components for safe assembly. Both need chimney caps. Rigid liners need connectors to link the sections together. If the chimney turns at an angle, the rigid liner will need an elbow-type connector.

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How to Buy Chimney Flue Liners

Rigid

Flexible

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