One of the most common questions we hear from customers is: "How complicated is it to install a gas fireplace?"
The honest answer: it's not a DIY project. Gas fireplace installation requires a licensed professional. But understanding the process — from planning to final inspection — helps you set realistic expectations, ask the right questions, and make sure the job gets done right.
Here's what the installation process typically looks like from start to finish. If what you're really trying to work out is the budget, skip ahead to how to read a gas fireplace quote, which breaks down what every line item should cost.
The Installation Process: Step by Step
Site Assessment and Planning
Before anything is ordered or installed, your contractor will assess the site. Key questions they'll answer:
- Where will the fireplace be located? Interior vs. exterior wall affects venting options.
- How will it vent? Horizontally through an exterior wall, or vertically through the roof? Our guide to direct vent vs. vent-free covers why this decision comes first.
- Is there existing gas service in the room? If not, a gas line extension will be required — usually the single largest variable in the quote.
- What clearances are available? The installation must meet minimum clearances to combustibles on all sides.
- What's the framing situation? The opening may need to be framed or modified to fit the unit. Rough opening dimensions vary by model — see our room-by-room sizing guide for verified figures.
Permits
In most jurisdictions, a gas fireplace installation requires a permit. Your licensed contractor will typically handle the application on your behalf. Permit requirements generally cover gas line work, venting, and structural framing modifications.
Don't skip the permit. Unpermitted gas work can create liability issues when you sell your home — and more importantly, it means no one officially verified the installation is safe.
Framing and Rough-In
Once permits are in hand, the physical installation begins:
- Framing — the opening is framed to the fireplace's rough opening dimensions.
- Gas line rough-in — a licensed plumber or gas fitter runs the gas line to the fireplace location and installs a shutoff valve.
- Venting rough-in — the vent pipe is run from the fireplace location to the termination point.
Working with an existing masonry opening instead? A gas fireplace insert skips most of this stage. See zero-clearance vs. insert to work out which one your home needs.
Fireplace Installation
With the rough-in complete, the fireplace unit is set into the opening. The installer will:
- Slide the firebox into the framed opening
- Connect the gas supply line
- Connect the vent pipe to the firebox collar
- Verify all clearances to combustibles
Finishing Work
After the unit is set, finish work begins:
- Facing and surround — the area around the firebox is finished with tile, stone, drywall, or a pre-built surround kit.
- Controls — the remote control receiver, thermostat, or wall switch is wired and connected.
- Trim kit — installed to frame the glass opening cleanly.
Start-Up and Inspection
With everything in place, the installer performs the initial start-up:
- Gas supply is turned on and all connections are tested for leaks
- Pilot is lit and the main burner is fired
- Flame height, remote control, and thermostat function are verified
- Vent is checked for proper draft and exhaust
A final inspection by your local building department confirms the installation meets code. Once approved, you're ready to use your fireplace.
How Long Does It Take?
A straightforward installation — single-story home, exterior wall, no gas line extension — typically takes one to two days. More complex installations with longer vent runs, gas line extensions, or custom facing work may take three to five days.
What Should It Cost?
Installation quotes vary widely by region and by how much gas line and venting work your home needs, so any single national figure is close to meaningless. What is useful is knowing which line items belong on the quote and which ones are padding.
Our guide to reading a gas fireplace quote walks through every line item — firebox, venting, gas line, framing, finish work, permits and start-up — so you can compare two bids properly instead of just comparing the total at the bottom.
Choosing the Fireplace Itself
The installer handles the install. Choosing the right unit is the part that's on you, and it's worth doing before you gather quotes — the model determines the venting, the rough opening and much of the labour.
- How to choose the right Kingsman gas fireplace — series, size, fuel and ignition, step by step
- Millivolt vs IPI vs ProFlame 2 — which ignition system suits your home
- The best direct vent gas fireplaces — an honest room-by-room comparison
- Converting a wood-burning fireplace to gas — if you already have an opening to work with
Or browse the range directly: Kingsman gas fireplaces, linear gas fireplaces, see-through models, and gas fireplace inserts.
Lumiflares Pro Installation
Lumiflares offers professional installation coordination for all Kingsman gas fireplaces. We'll connect you with a qualified installer in your area and stay involved throughout the process to make sure everything goes smoothly. The gas fitting, venting and inspection work is always performed by a licensed local professional — what we do is make sure the right unit arrives and that whoever installs it has the specifications they need.
Ready to get started? Browse Kingsman gas fireplaces or learn about our Pro Installation service.
Shop Kingsman Gas Fireplaces → Learn About Pro Installation →Questions? Our specialists are available Monday to Friday 8AM–5PM ET and Saturday 10AM–5PM ET. Call 877-879-9191 or email support@lumiflares.com.
