Gas Fireplace
Gas Fireplace Installation in Ontario
Choosing Your Fireplace
Choosing between a direct vent insert, a built in linear fireplace or a freestanding stove depends on your home's layout, the wall you're working with, and whether you want a vented unit at all. Direct vent models draw outside air for combustion and exhaust through a sealed pipe, which makes them the most common choice in Ontario renovations because they can go on nearly any exterior wall without a full masonry chimney. Linear fireplaces have become popular in newer builds and condo renovations for their wide, low flame picture.
Every installation starts with sizing the unit to the room, confirming the gas line can deliver enough volume at the right pressure, and planning the vent run to meet clearance requirements from windows, soffits and property lines. A permit and inspection typically apply to new gas fireplace installations in Ontario, and skipping that step can cause problems later with insurance or resale. Once the unit is set, connected and vented, we pressure test the gas line and run a full startup before handing it over.
Service Inclusions
- ✓ Inserts & direct vent
- ✓ Gas line installation
- ✓ Venting & permits
- ✓ Startup safety test
Typical price range
$3,500 to $8,000
Typical Ontario price range before tax. Your actual price depends on your equipment, parts and access, and is confirmed after we assess the job.
Get a tailored estimate →When Installation Makes Sense
Old fireplace is failing repeatedly
When repair costs keep climbing on an aging unit, replacing it with a new, more efficient fireplace often makes more sense than another round of parts.
Renovation opening up a wall
A renovation is the easiest time to run a new gas line and vent path before drywall and finishes go back up.
Wanting to add a fireplace where none exists
Direct vent units make it possible to add a fireplace to a room without an existing chimney, provided there's a nearby exterior wall.
Upgrading from wood to gas
Converting an existing wood burning fireplace to a gas insert is a common project that still needs its own venting plan.
Our Installation Process
- 01
We look at the room
The wall or chimney you want to use, and the BTU output needed, then recommend a unit that fits the space rather than oversizing it for looks.
- 02
We confirm the existing gas line can supply the new
Unit or run a new line, and plan the vent termination to clear windows, decks and property lines properly.
- 03
The fireplace is set
Connected to gas and vented according to the manufacturer's instructions, with all joints sealed and supported correctly.
- 04
Before handover we pressure test the gas connection
Confirm clean ignition and flame quality, and walk through operation and basic care with you.
What Installation Involves
Direct vent insert installation
Pricing depends on the unit chosen, whether an existing gas line can be reused, and how far the vent needs to run to an exterior wall.
New gas line runs
Adding a fireplace where no gas line currently exists adds cost for running and pressure testing new pipe to the location.
Permit and inspection fees
Required building approvals, electrical work and inspections vary by installation scope and location. Ask which apply and whether their fees are included, particularly when a project changes framing, vent routes or gas supply.
A properly sized and vented fireplace runs cleaner, uses less gas for the same heat output, and avoids the nuisance faults that come from a unit installed too close to clearance limits. Getting the gas line and venting right the first time also means you won't be paying to redo work later when an inspector or home sale uncovers a shortcut.
Gas Safety First
Any new gas appliance connection carries risk if it isn't tested properly, so every installation includes a pressure test on the gas line and a combustion check once the unit is running. If you ever smell gas near a newly installed fireplace, leave the house immediately and call your gas utility or emergency services from outside rather than investigating it yourself. We also confirm the vent termination has proper clearance from windows, doors and anything that could block it, since that clearance is what keeps combustion gases away from living space.
Planning Tips
If you're renovating
If you're renovating, decide where the fireplace vent will exit before finishing walls or ceilings, since retrofitting a vent path later is far more disruptive.
A gas fireplace run often for supplemental heat uses
More fuel than one lit occasionally for ambiance, which can affect which model makes sense.
Warranty coverage on a new fireplace often depends
On professional installation and registration, so keep your installation paperwork on file.
Why Choose Us
We install direct vent, linear and built in gas fireplaces across Ontario, handling the gas line, venting and permit side of the job along with the unit itself.
Full scope under one visit
Gas line, venting and the fireplace itself are handled together instead of being split across separate contractors.
Proper sizing
We size the unit to the room and gas supply rather than installing whatever fits the opening.
Startup testing included
Every installation ends with a pressure test and a real world startup check, not just a visual once over.
Common Questions
+Do I need a permit to install a gas fireplace in Ontario?
Requirements vary with the municipality and project scope. New framing, vent openings, electrical work or other alterations may need approvals. Confirm the applicable requirements with the qualified installer and local authority before work starts, including who arranges inspections.
+Can I install a gas fireplace without an existing chimney?
Yes, direct vent units are built for exactly this, venting through a sealed pipe to a nearby exterior wall instead of a traditional masonry chimney.
+How long does a typical installation take?
A straightforward insert replacement using an existing gas line and vent path can often be completed in a day. New gas lines or vent runs through finished walls add time.
+What size fireplace do I need for my room?
Room volume, ceiling height, insulation and whether you want supplemental heat or mostly ambiance all factor into sizing. We calculate this during the site visit rather than guessing from room square footage alone.
+Can you convert my wood fireplace to gas?
Often yes, using a gas insert or log set designed for the existing firebox, though the chimney or venting still needs to be assessed for the conversion.
+What happens during the startup test?
We run the fireplace through multiple ignition cycles, check flame pattern and colour, confirm pilot and thermocouple readings, and pressure test the gas connection before considering the job complete.
Where We Install
HeatNest installs gas fireplaces for homeowners throughout Ontario, from city renovations to rural properties adding a fireplace where one never existed before.
Acton · Adjala Tosorontio · Ailsa Craig · Ajax · Angus · Arva · Aurora · Aylmer · Ayr · Barrie · Bolton · Bowmanville · Bradford · Brampton · Brantford · Brooklin · Burford · Burlington · Caledon · Cambridge · Clarington · Collingwood · Courtice · Delaware · Dorchester · Dutton · East Gwillimbury · East York · Enniskillen · Erin · Etobicoke · Exeter · Fort Erie · Georgetown · Georgina · Glencoe · Grimsby · Guelph · Halton Hills · Hamilton · Hensall · Ilderton · Ingersoll · Innisfil · Keswick · Kilworth · King City · Kitchener · Komoka · Lincoln · London · Lucan · Markham · Midland · Milton · Mississauga · Mitchell · Mitchell Corners · Mono · Mount Brydges · New Tecumseth · Newcastle · Newmarket · Niagara Falls · Niagara on the Lake · Nobleton · North York · Norwich · Oakville · Orangeville · Orillia · Oro Medonte · Orono · Oshawa · Ottawa · Parkhill · Pelham · Pickering · Port Colborne · Port Stanley · Puslinch · Richmond Hill · Scarborough · Schomberg · Scugog · Shedden · Smithville · Springwater · St. Catharines · St. Marys · St. Thomas · Stratford · Strathroy · Sutton · Thamesford · Thorndale · Thornhill · Thorold · Tillsonburg · Toronto · Tottenham · Tyrone · Unionville · Uxbridge · Vaughan · Wasaga Beach · Waterloo · Welland · Whitby · Whitchurch Stouffville · Woodstock
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What customers say about our gas fireplace installation
"Called in the morning, had someone here by mid afternoon. Friendly, careful and professional from start to finish."
"Great communication, I got a heads up before arrival and a clear summary of the work afterwards."
"The technician showed up on time, explained exactly what was wrong and had everything working the same afternoon. No upselling, just honest work."
Start Your Project
Ready to add or replace a gas fireplace in your home? Call HeatNest at (289) 801-7262 to talk through sizing, venting and what the installation will involve.