Cost guide
How much does furnace replacement cost in the GTA?
A new gas furnace in Etobicoke and the GTA typically runs $3,000–$7,500 installed, before any rebate. Where you land depends on the size and efficiency you need, the furnace type, and what your existing ductwork and venting require. Here are the typical ranges, what moves the cost, and how to tell whether it's time to replace rather than repair.
Typical cost in the GTA
$3,000–$7,500 installed
Typical installed price for a gas furnace across Etobicoke and the GTA (2026), before any rebate.
| Option | Typical installed price | What you get |
|---|---|---|
| Mid-efficiency, single-stage | $3,000–$5,000 | Reliable heat for a standard home at the lowest up-front cost. |
| High-efficiency, two-stage | $4,500–$6,500 | Quieter, steadier heat and lower gas bills every winter. |
| High-efficiency, modulating | $5,500–$7,500 | Top comfort and efficiency — best for larger or drafty homes. |
These are typical GTA installed ranges, not a quote. Your exact price depends on your home's size, existing ductwork and venting, and install complexity — we assess it and give you a written, all-in price for free before any work.
What moves the price
What actually drives the cost
Size & output (BTU)
Sized to your home with a proper heat-loss calculation — not a rule of thumb. Oversizing short-cycles; undersizing runs constantly and wears out faster.
Efficiency (AFUE)
A higher-efficiency furnace costs more up front but uses less gas every winter. We show the trade-off for your home and usage.
Furnace type
Single-stage, two-stage, or modulating — comfort and efficiency rise with the tier, and so does the price.
Ductwork & venting
The condition of your existing ducts, and whether a high-efficiency model needs a new chimney liner to vent safely, both factor in.
Removal & install complexity
Removing the old unit, access in the mechanical room, and any gas or electrical changes all affect the labour.
Repair or replace your furnace?
Rule of thumb: if a repair runs more than about half the price of a new furnace — or the unit is past 15 years and failing often — replacing usually pays back in lower gas bills. A cracked heat exchanger is a safety replacement, not a repair. We'll give you the honest repair-vs-replace numbers in writing so you're not guessing.
Cost questions, answered
Furnace Replacement Cost FAQs
How much does a new furnace cost in the GTA?
A furnace replacement in Etobicoke and the GTA typically runs $3,000–$7,500 installed before rebates. A mid-efficiency single-stage unit is usually $3,000–$5,000; a high-efficiency two-stage or modulating furnace runs $4,500–$7,500. Your exact price depends on size, ductwork, and venting — we give you a written, all-in number for free.
When should I replace instead of repair?
If your furnace is past 15 years, breaking down often, or a single repair is close to half the cost of a new unit, replacing usually makes more sense. A cracked heat exchanger is an automatic replace for safety.
Does a high-efficiency furnace need new venting?
Often, yes — high-efficiency furnaces vent differently and may need a correctly sized chimney liner. We assess this as part of the quote so there are no surprises.
Can a furnace replacement get a rebate?
Standard gas furnaces generally aren't rebated under the current Ontario program — incentives favour heat pumps. If you're open to a heat pump, the rebate can be significant; see our rebates page.
Get your real number — in writing
Free in-home estimate, written pricing, no obligation.