Can a fireplace make radon levels in my house worse?

More cold hours means more hours of suction

Radon draw isn't just about how hard a fireplace pulls, it's about how long it pulls, and Waynesville's longer, colder season stacks the hours. Those older Hazelwood fireboxes were built open and draft hard by design, so every evening the fire is lit the house is sucking make-up air in through the slab, crawlspace, and foundation cracks. Multiply that over a heating season three weeks longer than the valley towns and the exposure adds up.

Cold outdoor air also makes the stack effect stronger, so the same firebox pulls harder on a 20-degree Waynesville night than it would down the mountain in Asheville.

Wood, gas, or electric changes everything here

Waynesville runs on mixed fuel — natural gas in parts of town, propane out toward the ridges — and the appliance matters more than the fuel. An open wood fire is the big mover; a sealed [direct-vent gas](/services/gas-fireplace-installation) unit pulls its air from outdoors and barely touches house pressure; electric moves none but leaves you cold in an outage. If radon is on your mind, closing an open firebox into a sealed insert is the biggest single improvement.

The permit and the honest scope

We pull the Haywood County permit and meet the inspector on every gas line, and we're about 35 minutes west of the Asheville showroom. Radon mitigation itself — the sub-slab suction system — is a different specialty we don't do; our part is the fireplace, from combustion-air kits to insert conversions. Test with an inexpensive kit before you decide anything, then fix the hearth and the radon system as one project. Call (828) 545-0525.