Is Western North Carolina a high-radon area, and does adding a fireplace affect radon levels?
Yes — Asheville sits squarely in Buncombe County's EPA Zone 1 for radon, so most homes here carry real potential. A fireplace won't generate the gas, but an open masonry firebox drawing room air can briefly increase how much seeps up from your crawlspace or basement. A sealed direct-vent unit avoids that entirely.
Two Ashevilles, two radon stories
Montford, North Asheville and the older streets around Grove Park are full of tall, original masonry fireplaces sitting over crawlspaces and stone-walled basements — exactly the setup where a big open fire pulls hardest on the ground beneath the house. South Asheville's newer construction runs the other direction: sealed envelopes and slab foundations where clean-face gas already dominates. Both areas test high often enough that we tell every homeowner the same thing — we install hearths, not radon systems, so if you've never measured your number, buy an inexpensive test kit before you change anything about how air moves through the house.
Why the firebox matters
Radon rides up through the soil under negative pressure. Run an open fire or a room-air wood stove and warm air races up the chimney; the house pulls replacement air from its lowest, leakiest point — often your crawlspace — and some of that carries soil gas with it. It's usually a modest bump, but in a home already reading high, it counts. A sealed direct-vent fireplace breathes through a coaxial pipe to the outdoors, so it never robs indoor air and never adds suction on the ground below.
Our default for tight homes
That sealed design is why direct-vent is what we reach for first in Asheville's newer and renovated homes, and it's about ten minutes from our Emma Road showroom if you want to see one lit. We'll help you match the appliance to your foundation type and, when there's gas work, pull the Buncombe County permit and meet the inspector. Radon mitigation itself belongs to a specialist — but picking the right hearth keeps the problem from getting worse. Call (828) 545-0525.
Fireplace help in Asheville
We install and service fireplaces throughout Asheville and the rest of Buncombe County — we're headquartered right here.
Related questions
- Can a wood-burning fireplace or stove actually pull more radon into the house?
- Are sealed direct-vent fireplaces the better choice for a home with radon concerns?
- Can a radon mitigation system interfere with my fireplace's draft, or vice versa?
- My home has an encapsulated crawlspace or a tight envelope — does my fireplace or wood stove need outside combustion air?
- Can a heavy fireplace or stone surround be installed in a home built over a crawlspace?