Can You Convert a Wood-Burning Fireplace to Gas? Options and Real Costs

"Can I convert my wood-burning fireplace to gas?" is one of the most common calls we get at Luxury Fire, usually from someone staring at a fireplace they never use because it's messy, drafty, and eats more heat than it gives. The short answer: yes, almost always. The real question is which conversion, because there are three very different paths at three very different prices. After 20+ years and hundreds of these projects, here's how I walk customers through it.

Your Three Conversion Options

1. Gas log set. A burner and ceramic logs installed in your existing open firebox, with a gas line run to the fireplace. It's the budget path: the fireplace looks alive again, but an open fireplace is still an open fireplace, most of the heat goes up the chimney.

2. Gas fireplace insert. A sealed, high-efficiency gas unit that slides into your existing masonry firebox, vented through a liner up your chimney. This is the true heating upgrade, and it's the option I start with for most customers.

3. Full tear-out and new fireplace. Removing the old fireplace entirely and building in a new direct vent unit. It's the remodel path, chosen when the project is bigger than the fireplace itself.

In our showroom, when budget allows, I always start the conversation at the insert. If the budget isn't there, we step down to a quality vented log set. And most people end up choosing the insert, and the reason is usually the same: what happens to the combustion byproducts. A sealed insert takes the carbon monoxide question off the table completely, everything the flame produces exits through the vent, while the room heat comes from a blower pushing air around a sealed heat exchanger.

Real Conversion Costs From Our Jobs

Conversion path	Typical all-in cost	What you get
Gas log set	~$3,000 including running the gas line into the fireplace	Ambiance and convenience; limited heating
Gas insert	$7,000 – $10,000 installed	Sealed, efficient zone heater with realistic flame
Full replacement	Varies widely by project	New fireplace, new design, remodel-level scope

If you want the line-by-line breakdown of where insert money goes, unit, liner, labor, and the outlet everyone forgets, we published our real numbers in the gas fireplace insert cost guide.

What Can Actually Stop a Conversion

Here's what surprises people: it's almost never the gas line. Even when the line has to be drilled through masonry or brought in through the chimney structure, that's routine work for a proper installer.

The real dealbreaker is the chimney itself. A gas insert needs a liner running the full height of the chimney, and some chimneys, because of condition, blockage, or construction, simply can't be lined. When that happens, a vent-free unit becomes the only gas option for that fireplace. Vent-free is a legitimate product within its limits, but it comes with real trade-offs we covered honestly in our vented vs ventless comparison, and it's restricted or banned in some places. Tell us your situation before you buy anything, we'll tell you which paths your chimney actually supports.

The Sizing Misunderstanding Everyone Arrives With

The single most common misconception: that any insert fits any fireplace, or that inserts are custom-built to your opening. Neither is true. Inserts come in standard sizes, small, medium, and large, and the job is matching your firebox measurements to the right one. My rule for customers: select the largest insert that fits your fireplace. You get the biggest viewing area, the most presence, and the most heat for the space you already have. This is exactly why we ask for measurements before quoting, a beautiful insert in the wrong size disappoints every day it runs.

Do People Regret Giving Up Wood?

Honestly, almost never. The reaction we hear over and over after a conversion is some version of two things: shock at how efficient the new unit is compared to the old open fireplace that was pulling warm air out of the house, and disbelief at how real the flame looks. Modern burners with detailed log sets and ember beds are nothing like the gas fireplaces people remember from decades ago. The fireplace goes from the thing they never light to the thing they use every evening, and that's the whole point of converting.

Wood-to-Gas Conversion FAQ

How much does it cost to convert a wood fireplace to gas?

From our real projects: around $3,000 all-in for a gas log set including the gas line, and $7,000 to $10,000 installed for a sealed gas insert.

Can every wood-burning fireplace be converted?

Nearly all can take some form of gas. The limiting factor is usually the chimney: if it can't be lined, a sealed insert is off the table and vent-free becomes the only gas option, where code allows it.

Can I still burn wood after converting?

Not in that fireplace. A gas insert and its liner permanently occupy the firebox and flue. If burning wood still matters to you, say so before we design the project.

What size gas insert do I need?

Inserts come in standard small, medium, and large sizes, they are not custom-made. Measure your firebox opening (width, height, depth) and choose the largest unit that fits for the best viewing area and heat output.

Do I need a permit?

Gas and venting work is permitted, inspected work in most municipalities, and manufacturer warranties expect professional installation. Budget a few hundred dollars and don't skip it.

Ready to see what fits your fireplace? Browse our gas fireplace inserts, see our expert insert picks, or book a free consultation, send us photos and measurements of your fireplace and we'll tell you exactly which conversions your home supports. We ship nationwide.

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Christopher Tapia has spent more than 20 years in the hearth industry and operates the Luxury Fire showroom in Hamden, CT, shipping premium fireplaces and inserts nationwide. He has personally guided hundreds of wood-to-gas conversions from first phone call through final inspection.