Can a gas insert be installed in my existing masonry fireplace?
Yes — an existing masonry fireplace is the ideal home for a gas insert. The insert slides into your firebox, we run a stainless steel liner up the chimney for sealed venting, and connect a licensed gas line. You trade an open fireplace that loses most of its heat up the flue for a sealed, efficient, power-optional heater.
Why the masonry firebox is perfect for it
A gas insert is built to do exactly this — retrofit into an existing masonry fireplace and turn it into a real heater. Your open masonry fireplace, honestly, can run a net heat loss: it pulls warmed room air up the chimney all night. A sealed gas insert flips that, commonly running 70% efficient or better, and gives you flame at the flip of a switch with no hauling wood and no cold-start smoke. With millivolt or battery-backup ignition, it keeps throwing heat when the power's out — the lesson a lot of WNC homeowners took from Helene.
What the install involves
We measure the firebox, confirm the flue is sound, and drop in the insert. A gas insert vents through a stainless steel liner run up your existing chimney — often co-linear, two liners, one feeding combustion air and one exhausting — so the sealed system works properly. The old damper gets clamped or removed so it can never close on the liner. Then we run and pressure-test the gas line, because in North Carolina connecting fuel is licensed work, and set the unit up for your fuel — natural gas along the Asheville and Hendersonville mains, propane out in Fairview, Candler, and the cabins.
Picking the insert
We carry inserts built for masonry retrofits — the Napoleon Oakville X4, the Kozy Heat Chaska 25L with a blower standard, plus Valor's L1 and L2 gas inserts. The right one depends on your firebox size, your fuel, and how much heat you actually want. Bigger isn't automatically better; we'd rather size it to your room than oversell you. We install and permit the whole thing, then meet the county inspector — one accountable company, not a showroom pointing you elsewhere to find someone licensed to make it burn. Call (828) 545-0525 or visit our Asheville showroom to see them running.
Related questions
- Does a gas fireplace insert need a chimney liner?
- How do you measure a fireplace to know if an insert will fit?
- Can a wood-burning insert be installed in my masonry fireplace?
- Do I need a chimney inspection before installing an insert?
- Does the damper get removed or clamped when installing a gas insert?
- Can I put a gas fireplace in my bedroom?
Still deciding? Talk to a real installer.
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