Using The Fireplace In Super Cold Weather: Good Idea Or Bad Idea?

The current Northern Illinois weather has people looking for ways to keep themselves warm when the temps are dropping to sub-zero levels and wind-chills, and one of those ways is spending time in front of the fireplace.

But, by doing that, you have to ask yourself this question: Is my fireplace helping, or stealing heat from the rest of my house during periods of extreme cold?

If you’ve ever stood in your living room during a brutal Midwest cold snap (like right now) and heard someone say, “Don’t light the fireplace, it’ll suck all the heat right out of the house,” congratulations. You’re not alone. That argument has probably played out in millions of homes, usually while someone is already reaching for a match.

So who’s right?

And while we’re at it, this is usually the same house where the thermostat is quietly being adjusted up or down a degree when no one’s looking. The great Midwest Thermostat War has no winners, only people wearing sweaters inside and pretending they’re fine.

The Answer Is: It Depends On The Type Of Fireplace You Have, And How Well Your Home Handles Extreme Cold Conditions

Traditional wood‑burning fireplaces look warm, smell great, and feel like they should heat a room especially when the wind chill is so nasty that it makes you angry.

But an open fireplace can act like a giant vacuum. When it’s single digits outside, the strong draft up the chimney can pull heated air out of your house and send it straight outdoors. Meanwhile, your furnace kicks into overdrive trying to replace the lost warmth.

That doesn’t mean you can’t enjoy a wood fire, it just means moderation and preparation matter, particularly when your furnace is already working overtime to keep pipes from freezing. Always open the damper fully before lighting, close it completely once the fire is out, and burn seasoned hardwood. Glass doors or a fireplace insert can make a big difference, keeping more heat inside where it belongs.

Having A Gas Fireplace May Put An End To Your Household Debate Over Whether To Use It Or Not

If you’ve got a gas fireplace, especially a sealed, direct‑vent model, you may actually win the debate, or at least shorten it enough to get back under a blanket. These units pull air from outside and vent exhaust outdoors, so they don’t rob your home of heated indoor air. Many are designed to provide real, usable warmth to the room they’re in, even during sub‑zero weather.

Still, extreme cold has a way of revealing problems, as we once found out in our house. If your gas fireplace hasn’t been serviced in a while (ours wasn't), it’s smart to have it checked before relying on it during a deep freeze.

One More Note Of Caution When It Comes To Your Fireplace

Cold weather can worsen chimney blockages from ice, creosote buildup, or even curious animals looking for shelter (because apparently raccoons also dislike polar vortexes). No matter what type of fireplace you use, working carbon monoxide detectors are an absolute must in the house (and, it's the law in Illinois).

The bottom line to all of this is that in single‑digit weather, your fireplace shouldn’t be an emotional decision, or the cause of a household shouting match. Gas fireplaces are usually efficient helpers. Wood‑burning fireplaces can still be enjoyed, but they’re best used if you have an insert or glass doors to keep the heat where you need it.