Best Furnace Repair Toronto replaces gas furnaces in Toronto and across the GTA, with TSSA G1/G2 licensed gas technicians and 20+ years of furnace service behind every repair-vs-replace recommendation. Installed prices are published: 80% AFUE mid-efficiency from $3,500 CAD and 95% AFUE high-efficiency from $5,500 CAD (2026 pricing), with removal, disposal, venting, permit, and commissioning included.
Most replacement calls start the same way: a furnace that is 18 to 25 years old, a repair quote that keeps growing, or a cracked heat exchanger found during a combustion analysis. This page sets out how the decision is made, what the installed price covers, and which Ontario rebates apply.
What Does Furnace Replacement in Toronto Involve?
Furnace replacement in Toronto is the removal of an existing gas furnace and the installation of a correctly sized new unit by a TSSA G1 or G2 licensed gas technician, to the Ontario Building Code and the CSA B149.1 natural gas code. The new furnace is connected to the Enbridge Gas supply, wired to Electrical Safety Authority (ESA) requirements, and commissioned before the crew leaves.
Pro Tip: Replacing a furnace before it fails outright gives you time to compare 80% and 95% AFUE options and confirm rebate eligibility, instead of choosing whatever unit is in stock during a cold snap.
The work covers heat-loss sizing, gas piping and connections, plenum and duct transitions, venting, removal of the old equipment, and a final commissioning combustion analysis. The same scope applies whether the furnace sits in the basement of a detached house in East York, a semi-detached home in North York, or a utility closet in a Scarborough townhouse.
| Efficiency Tier | Typical Installed Price (CAD) |
|---|---|
| Mid-efficiency 80% AFUE | $3,500 to $5,500 |
| High-efficiency 95% AFUE | $5,500 to $8,500 |
Rebate paperwork is filed for you on qualifying installs. The sections below cover how the replace decision is made and what goes into the installed price.
5 Signs Your Furnace Should Be Replaced, Not Repaired
Fixing an aging unit or starting fresh is a normal question to ask, and a few clear signs settle it. Repeated repairs on an older Lennox or Carrier furnace past its service life usually cost more over three winters than a new unit would.
The checklist below covers the indicators that make a new furnace the safer and cheaper choice.
- A confirmed cracked heat exchanger. A licensed technician confirms it with a camera inspection and elevated carbon monoxide (CO) during a combustion analysis. A cracked heat exchanger results in an immediate TSSA “Red Tag” shutoff in Ontario. On a 15-plus-year-old unit, this is always a replacement scenario.
- The unit is past 20 years old. Most gas furnaces last 15 to 25 years before critical parts fail. Past the 20-year mark, components fail in a rapid sequence, which is common in the 1990s furnaces still running in many Etobicoke and Scarborough bungalows and split-levels.
- Repair costs approaching half the price of replacement. A $1,200 CAD repair on a 19-year-old 80% AFUE unit rarely pays back. Our technicians see this often with older Goodman and Rheem units.
- Rising gas bills with no change in habits. A worn blower motor and declining combustion efficiency inflate Enbridge Gas bills long before a total breakdown, and the gap widens as gas rates rise.
- Uneven heat and constant short cycling. Older units were frequently oversized at installation. A replacement sized with a heat-loss calculation fixes the cold rooms and short cycling that a repair cannot.
Repair or Replace? How the Written Recommendation Is Calculated
Every customer receives a written repair-vs-replace recommendation. It uses four inputs.
The inputs are the furnace age against its expected service life, the condition of the heat exchanger, the CAD cost of the needed repair, and the expected annual gas savings. Upgrading an 80% AFUE furnace to a 95% AFUE model from a brand like Trane or Lennox cuts natural gas use by 15 to 20 percent.
The table below is the rule of thumb the Best Furnace Repair crew works from. A $200 CAD flame sensor fix on a 12-year-old furnace is a repair, not a reason to sell a new unit.
| Furnace age | Heat exchanger intact | Typical recommendation |
|---|---|---|
| Under 12 years | Yes | Repair, almost always |
| 12 to 18 years | Yes | Repair if the fault is a single component |
| 15+ years | No | Replace |
| 20+ years | Yes | Compare repair cost against efficiency gain |
| 25+ years | Either | Replace |
What Is Included in a New Furnace Install Price?
The quote covers everything required for a safe, code-compliant installation, itemised so there are no added charges on installation day.
The standard installed price includes:
- Removal and environmentally compliant disposal of the old unit.
- The new furnace, plus all gas piping, connections, and ESA-verified electrical hookups.
- Required venting, using ULC S636 certified PVC pipe for any condensing conversion, with side-wall terminations placed to code clearances from windows, gas meters, and neighbouring homes on narrow Toronto lots.
- A condensate drain and neutralizer, which protects your plumbing from the acidic runoff produced by 95% AFUE models.
- Custom sheet metal plenum and duct transitions.
- The municipal permit and full commissioning, including a combustion analysis, CO verification, static pressure check, and a thermostat cycle test.
A few items are quoted separately if the assessment shows your home needs them. Duct sealing costs $299 to $899 CAD. A compatible smart thermostat, such as an ecobee or Google Nest, runs $199 to $549 CAD installed depending on the model.
Which Ontario Rebates Cover a 95% AFUE Upgrade?
A 95% AFUE condensing furnace upgrade can qualify for provincial and federal incentives. As an ENERGY STAR certified installer, we confirm eligibility in writing before you commit and file the paperwork on your behalf.
The programs we file for:
- Enbridge Home Efficiency Rebate Plus: Up to $6,500 CAD on a qualifying 95% AFUE installation paired with the required home envelope upgrades.
- Canada Greener Homes Grant: Up to $5,000 CAD for eligible households upgrading to a high-efficiency system.
- Manufacturer promotions: Lennox, Carrier, and other brands run seasonal promotions that can sometimes be stacked with the rebates above.
- Filing done for you: Forms, model numbers, and installation records are submitted by us, which avoids the missing-document errors that delay or void rebate claims.
How Our Furnace Replacements Compare
| What you get on a replacement | Typical provider | Best Furnace Repair Toronto |
|---|---|---|
| Price | Quoted only after a site visit | $3,500 to $5,500 CAD (80% AFUE) and $5,500 to $8,500 CAD (95% AFUE) published on the page |
| Sizing | Matched to the old unit’s badge | Heat-loss calculation plus duct capacity and static pressure check |
| Removal, disposal, and permit | Often extra line items | Included in the installed price |
| Rebate paperwork | Left to the homeowner | Enbridge HER+ and Canada Greener Homes forms filed for you |
| Commissioning | Not always documented | Combustion analysis, CO verification, and thermostat cycle test recorded in writing |
For the efficiency side of the decision in detail, see high-efficiency furnace conversion.
If you are installing in a new build or an addition rather than swapping an existing unit, see furnace installation Toronto.
The full set of published scope bands is on the furnace repair Toronto homepage.
