How much gas does a fireplace use per hour at full input?
Flat Rock's answer starts with its housing: those oversized 1800s open masonry fireplaces burn no gas at all, and mostly send heat straight up an aging clay flue. Convert one to a sealed gas insert and the insert's rated BTU becomes your true hourly use — a 25,000 BTU Kozy Heat Chaska 25L draws about 25,000 BTU, roughly 25 cubic feet of natural gas, an hour on high.
Why the rated number finally means something after conversion
An open historic firebox has no fuel figure to quote — there's no gas in it, and what heat a wood fire throws largely escapes up the chimney. Once we set a sealed insert, you get a real, predictable rate: turn the Chaska to full and it's about 25 cubic feet an hour on Flat Rock's natural-gas mains, less as you modulate. Now the heat stays in the room and the drafty cold-air pull those old hearths are known for is gone.
Preserving character, fixing the draft
The point in Historic Flat Rock, Kanuga, and around Highland Lake is keeping the mantel and the look while ending the draftiness. A sealed insert threaded through the existing chimney does exactly that, and because it's sealed it holds to its rated fuel burn instead of leaking conditioned air the way the old firebox did all winter.
Done to code, on your century-old home
Older flues need a correctly sized liner and a licensed hand — we permit the work with Henderson County, meet the inspector, and protect your home's insurance and resale. We're 30 minutes south, and you can see these inserts running at our Asheville showroom first. Call (828) 545-0525.
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.