What's the mechanical difference between a natural gas and a propane fireplace?
Out on Mills River's large rural lots, propane from a tank is the common fuel rather than a natural-gas main — so most fireplaces here are jetted for LP. That means smaller burner and pilot orifices and a regulator set for propane's higher pressure, versus the larger orifices a natural-gas unit would use. Same firebox, different fuel train.
Propane behaves differently than gas — by design
Propane packs about two and a half times the energy per cubic foot of natural gas and arrives at higher pressure, which is why the LP setup runs tighter orifices and a purpose-built regulator. There's a safety difference too: propane is heavier than air and settles low if it ever leaks, while natural gas is lighter and rises — one reason LP appliances and their piping get installed, regulated, and leak-tested with that behavior in mind.
A propane system also involves the tank itself, which we coordinate with your supplier, plus the regulator and appliance hookup that we run and pressure-test as licensed gas work.
The open valley is made for outdoor fire
Mills River's wide, open valley is prime territory for a gas fire pit or an outdoor fireplace, and out here those almost always run on propane — an outdoor-rated LP line off your tank rather than a utility main. If you're planning one for entertaining season, late spring is the time to run the buried line and set the appliance regulator before the ground's frozen and guests are arriving.
Call (828) 545-0525 and we'll size the fuel line and confirm your tank can carry the load.
Fireplace help in Mills River
We install and service fireplaces throughout Mills River and the rest of Henderson County — just 25 minutes south from our Asheville-area showroom.
Related questions
- What is an orifice, and why are natural gas and propane orifices different?
- What does a natural gas to propane conversion kit actually change?
- Why do natural gas and propane flames look different?
- What gas pressure does a fireplace need — what is manifold pressure?
- Does high elevation affect how a gas fireplace burns or how much heat it makes?

