What size gas insert will fit my existing fireplace?
In Flat Rock the fireboxes are the story: many homes date to the 1800s with oversized open masonry openings and aging clay flue liners. An insert fits when its sealed body clears the four interior measurements with clearances, and a generous historic opening usually seats one easily — the surround simply frames a bigger gap.
Big historic openings, tapered and worn
A nineteenth-century Flat Rock firebox tends to be tall and deep, which is good news for fit — there's room to seat a well-sized insert — but the masonry is hand-laid and tapers, so we still measure front width, rear width, height, and depth cold. The old opening is often far larger than the insert's face, and a surround panel frames that difference cleanly without touching the historic brick around it.
The clay liner comes with the job
These aging clay flue liners are frequently cracked or pulling apart, and a sealed gas insert is installed with a correctly sized stainless liner regardless, so the two go together. Flat Rock is on the natural-gas mains, so most inserts run NG straight, and extending that line is licensed work we permit through Henderson County and pressure-test. A Napoleon or Kozy Heat insert seats well in these older openings.
Fix the draft, keep the character
Those grand open hearths pull cold air straight into the room, which is why so many Flat Rock owners seal them. A sealed insert stops the draft and adds efficient, power-optional heat while preserving the mantel and surround you bought the house for. We're 30 minutes south of the Emma Road showroom — call (828) 545-0525 for a free in-home measure.
Fireplace help in Flat Rock
We install and service fireplaces throughout Flat Rock and the rest of Henderson County — just 30 minutes south from our Asheville-area showroom.
Related questions
- What are the minimum firebox dimensions for a gas insert — will one fit a small fireplace?
- Can a gas insert go into a shallow firebox?
- How do I measure my fireplace for a gas insert?
- How much smaller than my fireplace opening will an insert's viewing window be?
- What is the surround or flashing panel on an insert and how is it sized?