Furnace Cost in Toronto: 2026 Installation Price Guide

What Does a New Furnace Actually Cost in Toronto?

In 2026, the all-in cost to purchase and install a new gas furnace in Toronto typically falls between $3,500 and $8,500 CAD, with the sweet spot for most mid-century detached and semi-detached homes sitting around $4,500 to $6,000. That range covers equipment, labour, permits, and a basic disconnect of the old unit. What pushes a project toward the high end is usually a combination of factors: switching from an 80% AFUE furnace to a 97% two-stage or variable-speed model, homes with complex ductwork, upgrading the gas line, or adding a new programmable thermostat and enhanced filtration. Toronto contractors also carry higher overhead than smaller Ontario markets, so location matters even within the province.

The furnace equipment itself accounts for roughly 40 to 60 percent of your total invoice. A standard single-stage 80% AFUE gas furnace in the 80,000 to 100,000 BTU range costs between $1,200 and $2,000 at wholesale, while a premium 96-98% AFUE modulating variable-speed unit from brands like Lennox or Carrier can retail between $2,800 and $4,500 before installation. Labour in Toronto runs $1,200 to $2,500 depending on job complexity, with permit fees adding another $150 to $400 through Toronto Building Services. Most licensed HVAC contractors bundle the permit into their quote — always confirm this before comparing bids.

• Standard 80% AFUE install: $3,500–$4,800 all-in
• Mid-efficiency 92–95% AFUE install: $4,500–$6,200 all-in
• High-efficiency 96–98% AFUE install: $5,500–$8,500 all-in
• Labour alone in Toronto: $1,200–$2,500 depending on complexity

Understanding AFUE: Why Efficiency Rating Drives the Price

AFUE — Annual Fuel Utilization Efficiency — is the standard metric used across Canada to rate how much of the natural gas your furnace burns actually becomes useful heat in your home. An 80% AFUE furnace wastes 20 cents of every dollar of gas up the flue. A 97% AFUE furnace keeps 97 cents. Natural Resources Canada (NRC) sets the minimum efficiency requirements for furnaces sold in Canada, and since 2019 those minimums have been 90% AFUE for gas furnaces installed in new Ontario homes. Older 80% units can still be installed as replacements in some circumstances, but most Toronto homeowners replacing a 1990s or early-2000s furnace are making the jump to high-efficiency equipment — and should be.

The efficiency jump from 80% to 96% is not just about fuel savings; it fundamentally changes how the furnace works. High-efficiency condensing furnaces extract so much heat from combustion gases that the exhaust cools below the dew point and condenses into water vapor, which drains away through a PVC condensate line. This is why high-efficiency furnaces vent through plastic PVC pipe out the side of the house rather than up a traditional masonry chimney. In a Toronto home with an existing B-vent chimney, switching to a condensing furnace means your old chimney becomes unused — a detail that affects installation cost and may require chimney abandonment or repurposing for a water heater. Use our [efficiency savings calculator](/tools/efficiency-savings-calculator) to model exactly how long it takes for the higher upfront cost to pay back through lower gas bills.

Toronto-Specific Cost Factors: What's Different About This Market

Toronto is one of the most expensive HVAC markets in Canada. Union labour agreements, higher business licensing costs, and the density of the city all contribute to contractor overhead that is meaningfully higher than, say, Ottawa or Hamilton. The City of Toronto requires a building permit for furnace replacements, and inspections add both time and cost to every job. Parking, traffic, and the challenge of getting equipment through narrow Toronto row-house corridors add labour time that contractors reasonably pass along. Homeowners in North York, Scarborough, Etobicoke, and the older inner-city neighbourhoods often have older homes with original ductwork that may need sealing, modifications, or partial replacement — which can add $500 to $2,000 to a furnace job.

The age of Toronto's housing stock is another cost driver many homeowners overlook. A significant portion of Toronto's residential units were built between 1945 and 1975. These homes frequently have older gas lines that may need upgrading to accommodate a modern high-fire furnace, cast-iron radiators that have since been converted to forced-air leaving questionable ductwork in the walls, or electrical systems that cannot support a modern furnace's 24-volt control board without remediation. A reputable Toronto HVAC contractor will assess all of these during an estimate visit — be cautious of any quote issued without a walk-through of the mechanical room and existing ductwork. The cheapest quote is not always the best one. Visit our [furnace installers in Toronto](/locations/ontario/toronto) directory to find vetted contractors who work in your specific neighbourhood.

Ontario Rebate Programs That Reduce Your Out-of-Pocket Cost

Ontario homeowners replacing an older furnace with a high-efficiency model have access to meaningful rebate money in 2026, and stacking multiple programs can reduce net cost by $1,000 to $3,000 or more. The Canada Greener Homes Grant program provided up to $5,600 in rebates but closed to new applications in 2024. However, the Canada Greener Homes Loan program — offering interest-free loans up to $40,000 for energy retrofits — remains an important financing tool and does not require a grant application. Enbridge Gas, which serves the vast majority of Toronto natural gas customers, runs the Home Efficiency Rebate program in partnership with the Ontario government. Enbridge's rebates for replacing an older furnace with a qualifying 96%+ AFUE model are in the range of $250 to $1,000, depending on the old equipment being replaced and the efficiency tier of the new unit.

The Enbridge rebate process requires using a registered contractor who participates in the program and completing a pre-approval step before the installation date. This is a detail that catches many Toronto homeowners off guard — you cannot retroactively apply for most utility rebates after the install is already done. Ask your contractor explicitly whether they are registered with Enbridge's rebate program and whether the model they are quoting qualifies. Some Toronto contractors package the rebate application into their service and handle the paperwork on your behalf, which is worth paying a slight premium for. Also check whether your home qualifies for the Canada Oil to Heat Pump Affordability program if you are converting from oil to gas-forced air, as the federal grant structure for fuel-switching projects differs significantly and can be much more generous — up to $10,000 in some conversion scenarios.

• Enbridge HER rebate for 96%+ AFUE furnace: up to $1,000 (confirm current program terms)
• Canada Greener Homes Loan: up to $40,000 interest-free for energy retrofits
• Oil-to-gas conversion: may qualify for OHPA federal grant up to $10,000
• Pre-approval is mandatory for most rebates — apply before installation day

Choosing the Right Furnace Size for a Toronto Home

Oversizing a furnace is one of the most common mistakes Toronto homeowners make, often driven by contractors who are either cutting corners on load calculation or simply quoting the same size as the unit being replaced. An oversized furnace short-cycles — it reaches thermostat setpoint quickly, shuts off, then fires back up minutes later. This creates temperature swings, excessive wear on the heat exchanger and blower motor, and poor humidity control, especially relevant in Toronto's winter months when the city regularly sees extended cold snaps below -15 degrees Celsius. The right furnace size is determined by a Manual J heat load calculation, which accounts for your home's square footage, insulation levels, window area, ceiling height, and infiltration rate. Natural Resources Canada publishes guidance on this methodology through its HOT2000 software platform.

For a typical Toronto detached home of 1,800 to 2,400 square feet built in the 1970s with standard insulation, the properly sized furnace usually falls between 80,000 and 100,000 BTU input. Smaller semi-detached homes and condos with forced air may be well-served by a 60,000 BTU unit. Larger Victorian-era homes above 3,000 square feet with high ceilings and single-pane windows can legitimately need 120,000 BTU or more. Use our [furnace size calculator](/tools/furnace-size-calculator) or [BTU calculator](/tools/btu-calculator) to get an independent sizing estimate before your contractor visits — it gives you a reference point to evaluate whatever they recommend and ensures you are not being sold a unit that is too large for your home.

Single-Stage vs. Two-Stage vs. Variable-Speed: Which Is Right for Toronto?

Toronto's climate makes furnace staging an important buying decision, not just a marketing upsell. The city averages around 4,000 heating degree days per year — cold enough that you need a capable furnace, but with enough mild days that a single-stage unit running at full blast is often overkill. A single-stage furnace has one speed: fully on. It fires at 100% capacity every time and shuts off when the setpoint is reached. This is effective but inefficient for the many days in November, March, and April when you only need 50 to 60% of your furnace's output. A two-stage furnace operates at roughly 65% capacity on most calls and ramps to 100% only on the coldest days. This alone improves comfort noticeably and typically results in 10 to 15% lower gas consumption compared to a single-stage unit of the same AFUE rating.

Variable-speed furnaces take this concept further by modulating both the gas valve and the blower motor continuously. The blower in a variable-speed unit ramps up slowly, runs for longer periods at lower speed, and distributes heat more evenly throughout the home — a significant comfort advantage in a two-storey Toronto house where the upstairs is often overheated while the main floor never quite reaches setpoint. Variable-speed blower motors (ECM motors) also use dramatically less electricity than traditional PSC motors — roughly 80 watts versus 400 to 600 watts — which matters given Ontario's time-of-use electricity rates. The premium for a variable-speed unit is typically $800 to $1,500 over a two-stage model. For most Toronto homeowners planning to stay in their home for 10 or more years, this premium pays back through comfort and operating cost savings. Explore our [variable-speed furnaces](/categories/variable-speed-furnaces) category for current models and pricing.

Financing a Furnace Replacement in Toronto

A furnace replacement is rarely a planned expense. Most Toronto homeowners face the decision in November or January when their existing system has failed or is clearly on its last legs. The combination of urgency, a large ticket price, and the cold-weather timeline creates real financial stress. Fortunately, the financing landscape for HVAC equipment in Canada has improved considerably. Many manufacturers — including Lennox, Carrier, and Goodman — run seasonal promotional financing through their dealer networks offering 12 to 24 months with no interest. These promotions tend to appear in late fall and early spring. HVAC contractors in Toronto also frequently partner with Financeit, LendCare, or Greensky to offer installment financing at rates ranging from 5.99% to 12.99% APR depending on credit profile, repayable over 24 to 120 months.

The Canada Greener Homes Loan is a compelling option for homeowners who qualify — it provides up to $40,000 at 0% interest over 10 years for eligible retrofits, which means you could finance a $6,000 furnace installation at roughly $50 per month with no interest charges at all. To qualify, you need a pre-retrofit EnerGuide home evaluation performed by a Natural Resources Canada-registered energy advisor before the work begins. This adds time and a modest cost (typically $300 to $600 for the advisor visit), but for larger projects the 0% rate makes it the best available financing in Canada. If you need a faster path to financing without the audit process, explore the [financing options](/financing) available through Furnace.sale's lending partners, where you can see pre-qualification terms without affecting your credit score.

How to Compare Quotes and Avoid Common Pitfalls

Getting three quotes is the standard advice, and it still holds — but knowing what to look for in each quote matters more than the number of quotes you collect. A complete furnace quote should specify the exact model number of the furnace being installed, the AFUE rating, the input BTU capacity, the warranty terms (both manufacturer and labour), whether the permit is included, what happens to the old equipment (disposal should be included), and the timeline. Quotes that list only 'a 96% two-stage furnace' without a model number are incomplete and create room for substitution. Ask every contractor to provide the manufacturer model number so you can verify specifications independently. Use our [furnace comparison tool](/compare) to evaluate two or three models side by side on efficiency, features, and pricing before your contractor appointments.

Red flags in the Toronto market include contractors who push for same-day signing with a 'today only' discount, who quote without visiting the home, who cannot provide their TSSA contractor registration number, or who offer prices dramatically below every other quote you received. In Ontario, anyone installing gas appliances must be licensed through the TSSA — the Technical Standards and Safety Authority. You can verify a contractor's gas technician licence on the TSSA website at no cost. Also be aware of the rental model offered by some large companies — zero-down programs mean you never own the equipment and pay a monthly fee indefinitely, which adds up to far more than purchase cost over a 15-year equipment life. If cash flow is the concern, the Canada Greener Homes Loan or a conventional installment plan is almost always a better financial outcome than a long-term rental agreement.

• Always get the model number in writing — 'a 96% furnace' is not a spec
• Verify TSSA gas technician licence before signing any contract
• Avoid long-term rental programs; purchase plus financing almost always costs less over 15 years
• Permit and old-unit disposal should both be included in a complete quote