How many BTUs do I need if the fireplace is my backup heat source during power outages?
For a Flat Rock home, don't size to that big 1800s open firebox — size to the room, about 20,000 to 40,000 BTU for one gathering area. An open masonry hearth loses heat and won't help in an outage; a sealed insert with millivolt or battery-backup ignition gives you real backup heat off the Henderson County gas mains.
1800s homes, oversized open hearths
Flat Rock's historic homes date to the 1800s, and many still have oversized open masonry fireplaces with aging clay flue liners. Beautiful — but an open hearth like that pulls cold-air drafts into the room and can run a net heat loss, which makes it a poor bet for backup heat. Size to the room, not the giant firebox: one gathering area needs roughly 20,000 to 40,000 BTU, and the right way to get it is usually a sealed insert rather than a fire roaring up an oversized chimney.
A sealed insert keeps the character, adds the heat
Dropping a sealed gas or wood insert into that historic opening — on a correctly sized liner — stops the draft and gives you real, power-optional warmth without changing the mantel and surround you love. A gas insert with battery-backup or millivolt ignition lights with the grid down; a wood insert gives you total independence for the longest outages. Flat Rock is on the natural-gas mains, so most homes tie straight in, and running that line is licensed work only a gas contractor can legally do.
Aging flue checked, permit pulled
Those old clay liners need a look before anything gets connected, and we handle that as part of the assessment. We pull the Henderson County permit and meet the inspector — permitted hearth work protects your home sale and homeowner's insurance. Thirty minutes south of the Asheville showroom. 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.
Related questions
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- What is zone heating and how does it change what size fireplace I need?