How much heat output (BTU) does a gas fireplace lose at mountain elevation?
In Arden, an old open masonry fireplace loses far more heat than the mountains ever will. At about 2,150 feet the altitude derate is around half a percent — invisible. But the tired open fireboxes in 1980s and 90s Royal Pines and Skyland homes pull warm air straight up the flue, which a sealed insert corrects.
Turning a drafty box into a real heater
The open masonry fireplaces in Royal Pines and Skyland were built to look good, not to heat, and many actually run a net heat loss — sending your warm room air up the chimney. Drop in a sealed gas insert with a properly sized liner and you get 70 percent efficiency or better, plus genuine room warmth. That's a far bigger swing than any elevation derate.
Right-sizing, not over-sizing
Bigger isn't better up here. We size the appliance to the room rather than to a fear of altitude, so you're not roasting or running short. For a larger Biltmore Park-area great room, a Heat & Glo anchors the space, and Arden's natural-gas mains keep the whole job simple.
We pull the Buncombe County permit and meet the inspector — 15 minutes south of the showroom. Call (828) 545-0525 for a free in-home assessment.
Fireplace help in Arden
We install and service fireplaces throughout Arden and the rest of Buncombe County — just 15 minutes south from our Asheville-area showroom.
Related questions
- Does WNC's mountain elevation affect how a gas fireplace performs?
- Do I need a high-altitude conversion kit for my gas fireplace, and above what elevation?
- Do ventless gas logs work at high elevations, or are they restricted above a certain altitude?
- Do wood fireplaces and stoves draft differently at higher elevations?
- Does a gas fireplace cost more to run on propane than on natural gas?