A fireplace insert is a self-contained, sealed firebox, wood or gas, that fits into an existing masonry fireplace opening. Because it is sealed rather than open to the room, it controls combustion air and radiates heat back into the room far more effectively than an open fire ever can.
Why the liner is not an optional add-on here
An insert is smaller in diameter than the big open flue behind an original masonry fireplace, and running it without relining to match its size causes poor draft, condensation, and creosote issues the insert manufacturer explicitly warns against. This is the same core issue covered on our liner installation page, and it comes up on nearly every insert job.
What installation includes
Wood or gas insert, which fits your situation
Frequently asked questions
How much more efficient is an insert really?
Open masonry fireplaces are widely recognized as one of the least efficient heating sources, often losing the large majority of generated heat up the flue. A properly installed insert redirects far more of that heat into the room.
Does the insert cover up my existing fireplace opening?
It sits within the existing opening with a surround trim kit finishing the transition, so the overall footprint stays similar while the internal mechanism changes completely.
Is relining always required for an insert?
In the large majority of cases, yes, since inserts are sized smaller than typical open-fireplace flues. We will confirm during assessment.
How long does insert installation take?
Most installations, including the liner connection and surround trim, are completed in a single day.