How many BTUs do I need if the fireplace is my backup heat source during power outages?
For a Mars Hill home, size backup heat to one gathering room — roughly 20,000 to 40,000 BTU, upper end for colder or drafty rooms. Out in the propane-and-wood valleys, choose millivolt ignition like the Valor H5, or EPA wood, so your heat doesn't depend on the grid.
Two markets, one sizing rule
Mars Hill mixes university-area rentals that want an easy-use gas fireplace with rural Spring Creek and Gabriels Creek homes that lean on propane or wood. Backup heat sizes the same for both — one gathering room, roughly 20,000 to 40,000 BTU — but it's one of the colder spots we serve, so larger or drafty rooms should push toward the upper end so they don't fall behind on a long outage night.
Rural means propane and grid-independence
Out in the valleys, homes run propane or wood, and outages can last. That's where the Valor H5 shines — millivolt, no circuit board, no blower, radiant heat that holds through a full grid-down week — or a Kozy Heat Springfield 36 at 30,000 BTU LP for a cabin gathering room. For total independence, EPA-certified wood needs no fuel delivery at all. Electric puts out nothing in an outage; we'll say so plainly instead of selling you one as backup.
Confirm fuel, pull the permit
Because Mars Hill is mixed fuel, we confirm gas versus propane and set the right orifices and pressure before anything gets sized — a wrong-fuel setup soots and runs cold. We pull the Madison County permit and meet the inspector on every gas line. Thirty minutes north of the Asheville showroom. Call (828) 545-0525.
Fireplace help in Mars Hill
We install and service fireplaces throughout Mars Hill and the rest of Madison County — just 30 minutes north from our Asheville-area showroom.
Related questions
- Does a gas fireplace need electricity, and will it still work in a power outage?
- What size gas fireplace do I need to keep a second home or cabin above freezing in winter?
- Can one gas fireplace or wood stove heat an entire house?
- Do I need an electrical outlet inside or near the fireplace for the blower and ignition?
- What is zone heating and how does it change what size fireplace I need?

