Is It Necessary to Install a Flue Liner Before Installing a Fireplace Insert?

In most cases, yes. Installing a flue liner is strongly recommended—and often required by local regulations—when fitting a fireplace insert into an existing chimney. A properly sized flue liner offers several important benefits: Improves draft and overall appliance performance Enhances safety by reducing the risk of chimney fires Ensures better smoke evacuation Helps prevent condensation and creosote buildup Guarantees compatibility between the insert and the existing chimney Before installation, the chimney should be inspected by a qualified professional to verify its condition, dimensions, and suitability for the chosen insert. The type and diameter of the flue liner will depend on the specifications of the appliance and the characteristics of the existing chimney. For a safe, efficient, and regulation-compliant installation, we recommend consulting a certified installer who can assess your chimney and recommend the most appropriate solution for your project.