By Daniel Watkins, Noble Chimney Sweepers.
Every winter the same call comes in: the power went out, the house is getting cold, and someone wants to know whether they can run the fireplace. The short answer is that a properly maintained wood-burning fireplace or stove is one of the few heat sources that works fine without electricity — and that most of the improvised alternatives people reach for in the same situation are the ones that put people in the hospital. Sorting out which is which before a Lemont ice storm takes the grid down is worth ten minutes now.
Can you use a fireplace when the power is out?
Yes, if it is a wood-burning fireplace or wood stove with a flue that has been swept and inspected. Nothing about a masonry fireplace depends on electricity. The draft is driven by the temperature difference between the flue gases and the outside air, not by a fan.
The catch is that an outage is the worst possible time to discover your chimney has a problem. A blocked flue, a stuck damper, or a nest in the cap turns a heat source into a carbon monoxide source, and the smoke detectors and CO alarms that would warn you may be hardwired units whose batteries have not been checked in years. The fireplace you can rely on in an outage is the one that was serviced in the fall.
What works without power — and what does not
Works: wood-burning fireplaces and wood stoves
Both operate on natural draft. A wood stove will hold heat far longer and put more of it into the room than an open fireplace, which sends most of its heat up the flue. If you have both, use the stove.
Works, with a caveat: pellet stoves
A pellet stove will not run in an outage. It needs electricity for the auger and the combustion blower, and it is a positive-pressure appliance — without the exhaust fan, combustion gases have no reliable path out. Do not try to hand-feed one. Some models accept a battery backup, and if yours does, that is worth setting up before winter.
Works, sometimes: gas fireplaces
It depends entirely on the ignition. A gas fireplace with a standing pilot and a millivolt valve generates its own control voltage from the thermocouple and will light and run with the power out. A unit with electronic ignition will not, unless it has a battery backup module. If yours has a blower, the blower will be dead either way — that is fine, the appliance still produces heat, it just circulates less of it. Never run a vent-free unit as an extended outage heat source in a closed-up house.
Never: anything not designed to be indoors
This is the part that actually hurts people. Do not bring in a charcoal grill, a camp stove, a propane patio heater, or a generator — not into the garage, not into a breezeway, not “just by the open door.” Do not run the kitchen range or oven for heat. These produce carbon monoxide with no flue to carry it out, and CO is odorless. Every winter these improvisations cause deaths that the fireplace, correctly used, would have prevented.
Running a fire safely during an outage
A few things change when a fire is going to run for hours instead of an evening:
- Open the damper fully before you light, and confirm it. In the dark, with a cold flue, this is the mistake that fills a house with smoke. Look up with a flashlight.
- Prime the flue. A cold masonry chimney holds a plug of dense cold air. Hold a rolled newspaper torch up near the damper for 30 seconds before lighting the fire, or the first smoke comes into the room.
- Burn seasoned wood only. Wet wood in a long outage burn is how you glaze a liner in a single night.
- Do not damp it down to stretch the wood. Starving a fire for air lowers flue temperature and lays down creosote fast. Burn a smaller fire hot rather than a large fire choked.
- Have working CO alarms. Battery or battery-backed, on every level, tested. This is non-negotiable during an outage, when other appliances are also behaving unusually.
- Never leave it burning unattended overnight. Let it burn down before you sleep. A masonry fireplace holds usable warmth for hours after the flames are out.
- Handle ash in a metal can with a lid, outdoors, away from the house. Coals stay live for days.
Two outage-specific problems worth knowing
First, when the power fails, so do the bath fans, the range hood, and the dryer — which usually helps draft, since those appliances compete with the chimney for air. But if you have a whole-house generator running the furnace, you can end up with a furnace and a fireplace pulling on a tightly sealed house at once. Crack a window an inch on the windward side if the fire is sluggish or you smell smoke.
Second, an ice storm that takes down the power often takes down tree limbs too. If a limb hits the chimney, or if the stack takes an impact, do not light a fire until the flue has been checked — a displaced tile or a cracked crown is not visible from inside the house.
Get ahead of it in Lemont
The fall service window is short, and it fills up. If the fireplace has not been swept since last season, book it now rather than during the first cold snap. A standard chimney sweeping and inspection confirms the flue is clear, the damper operates, and the cap is intact — the three things that decide whether the fireplace is an asset or a hazard when the lights go out. Homeowner-level checks you can do yourself are listed on our DIY chimney maintenance page, and every service we offer is listed with the price up front on the pricing page.
We serve Lemont and the surrounding Des Plaines River valley communities 7 days a week, 7 AM to 7 PM. Noble Chimney Sweepers is owner-operated, certified, bonded and insured, and I have been doing this for 14 years. Call (708) 432-5747 to get on the schedule.
Frequently asked questions
Is it safe to use my fireplace during a power outage?
Yes, if it is a wood-burning fireplace or stove with a swept, inspected flue, a working damper, and an intact cap. Natural draft does not need electricity. The risk comes from using a chimney whose condition is unknown.
Will my gas fireplace work without power?
Only if it has a standing pilot and a millivolt gas valve, which generates its own control voltage. Units with electronic ignition need power or a battery backup module. The blower will not run either way, but the appliance still produces heat.
Can I run my pellet stove in an outage?
No, not without a battery backup made for it. A pellet stove needs power for the auger and the combustion blower, and it vents under positive pressure — with the fan stopped, exhaust has no reliable way out.
Can I use a charcoal grill or camp stove indoors for heat?
Never, including in a garage or near an open door. These produce carbon monoxide with no flue to vent it, and CO has no odor. This is the single most dangerous outage improvisation.
How long can I keep a fire going?
As long as you have seasoned wood and someone awake to tend it. Do not stretch the fuel by closing the air control down — that cools the flue and builds creosote quickly. Burn a smaller fire hot instead.
My chimney smokes into the room when I light it. What is wrong?
In an outage the usual causes are a damper that is not fully open or a cold flue that was never primed. Confirm the damper with a flashlight, then warm the flue with a rolled newspaper torch held near the damper before lighting.
Do I need CO alarms if I only use the fireplace during outages?
Yes, and an outage is exactly when they matter most. Use battery or battery-backed alarms on every level of the house and test them before winter, since hardwired-only units stop working when the power does.
A storm knocked a branch onto my chimney. Can I still use it?
Not until it has been inspected. Impact can displace flue tiles, crack the crown, or dislodge the cap, and none of that is visible from inside the house. Have the flue checked before the next fire.
Published September 30, 2026