How much does a new furnace cost in Oshawa?
Ben Amina
Aire One East Heating & Cooling, Whitby, Ontario
The new furnace cost in Oshawa typically falls between $4,500 and $8,500 CAD installed, with the final price set by size, efficiency, venting, and the condition of your ductwork. This guide breaks the cost down by efficiency tier, explains what actually drives the price up or down, and covers the 2026 rebates and financing that can lower what you pay. Prices are quote based, so treat these as honest Oshawa ranges rather than a fixed number. To decide whether you even need a new unit, see our guide on whether to repair or replace your furnace.
The short answer: a new furnace in Oshawa usually costs between $4,500 and $8,500 CAD installed. A straightforward mid-efficiency swap sits near the bottom, a high-efficiency 96 percent unit in the middle, and a two-stage or variable-speed furnace at the top. Older Oshawa homes that need new venting or ductwork changes can add a few hundred to over a thousand dollars, and rebates or financing can reduce what you actually pay.
Aire One East is a Carrier Factory Authorized dealer serving Oshawa and Durham Region since 1991, with TSSA certified technicians, Licence #1219734, a 4.8 star rating across 364 Google reviews, and financing available. For a written quote, call 905-576-7600 or request one online.
Cost by efficiency tier
The biggest single factor in the price is the efficiency and staging of the furnace. Here is how the tiers compare in Oshawa, verified July 2026.
| Furnace type | Installed range (CAD) | Best for |
|---|---|---|
| Mid-efficiency | $4,500 to $6,000 CAD | Straightforward like-for-like swap |
| High-efficiency (96%+ AFUE) | $5,500 to $8,500 CAD | Lower bills, most Oshawa homes |
| Two-stage or variable-speed | $6,500 to $9,500 CAD | Even comfort, quieter operation |
| Venting or ductwork changes | Extra $300 to $1,500 CAD | Older homes, layout changes |
Typical Oshawa ranges in Canadian dollars (CAD), verified July 2026, subject to change. Exact pricing requires an in-home assessment. Financing is available.
What drives the price
Two homes on the same Oshawa street can get different quotes, and the reasons are usually the same handful of factors. Being fair, a higher quote is not automatically a worse deal; it often reflects real work the cheaper quote left out.
- Efficiency and staging, the single biggest driver, as the tier table shows.
- Furnace size, set by a heat loss calculation for your home, not by the old unit.
- Venting, since a high-efficiency furnace often needs new PVC venting the old mid-efficiency unit did not.
- Ductwork condition, where older Oshawa homes downtown or in the south end may need repairs or modifications.
- Removal and disposal of the old furnace, and a permit where required.
What a proper quote includes
An honest all-in quote should leave nothing to appear on install day. Confirm it covers the equipment, the installation labour, any required venting, removal and disposal of the old furnace, the permit, and a written labour warranty on top of the manufacturer warranty. A quote that is much lower than the others often omits one of these, so ask what is included before you compare on price. This is also covered in our furnace replacement guide.
Rebates and financing in 2026
Rebates can lower the net cost, but only current programs count. As of July 2026, most Ontario incentives favour heat pumps rather than straight furnace swaps, through the Home Renovation Savings Program from Enbridge Gas and Save on Energy. The federal Canada Greener Homes Grant closed to new applicants in February 2024. Because you are already investing in equipment, it is worth asking whether a heat pump, or a dual fuel system that pairs a heat pump with a gas furnace, changes the math for your Oshawa home. Financing spreads the cost over manageable monthly payments where an upfront replacement is not practical.
[VERIFY REBATE: confirm current Home Renovation Savings measures and amounts at homerenovationsavings.ca on the day of publish. Do not publish a figure that has not been checked.]
Is high-efficiency worth it
For most Oshawa homes, yes, though it depends on your current furnace and how long you plan to stay. Moving from an old furnace below 90 percent efficiency to a 96 percent unit can cut the gas used for heating meaningfully over a Durham winter, and the savings recover part of the higher upfront cost over the furnace's life. If you are staying only a year or two, a mid-efficiency unit may make more sense. If you are staying long term, high-efficiency usually pays back. Ask for the honest numbers for your home rather than a generic promise.
We size the furnace to your Oshawa home, quote it all-in and in writing, and walk you through rebates and financing. No surprises on install day.
Frequently asked questions
How much does a new furnace cost in Oshawa?
A new furnace in Oshawa typically costs $4,500 to $8,500 CAD installed. A mid-efficiency swap is near the bottom, a high-efficiency 96 percent unit in the middle, and a two-stage or variable-speed furnace at the top. Venting or ductwork changes can add $300 to $1,500 CAD, and rebates or financing can lower what you pay.
Why are furnace quotes so different?
Quotes vary with efficiency, size, venting, ductwork condition, and what is included. A much lower quote often leaves out venting, disposal, the permit, or a proper heat loss calculation. Compare all-in written quotes on the same scope rather than on headline price alone.
Does a high-efficiency furnace cost more to install?
Usually, yes, both for the unit and because it often needs new PVC venting the old furnace did not have. The higher upfront cost is offset over time by lower gas bills, so it typically pays back for homeowners staying long term. A technician can estimate the payback for your home.
Are there rebates for a new furnace in Oshawa?
Most 2026 Ontario incentives favour heat pumps rather than straight furnace replacements, through the Home Renovation Savings Program. The federal Greener Homes Grant closed in February 2024. It is worth asking whether a heat pump or dual fuel system qualifies for a rebate in your case. Confirm current programs before starting.
Can I finance a new furnace?
Yes. Aire One East offers financing that spreads the cost over monthly payments, which helps when an upfront replacement is not practical, especially for an emergency replacement in winter. Ask about current terms when you request a quote.
The bottom line for Oshawa homeowners
A new furnace in Oshawa runs $4,500 to $8,500 CAD installed, with efficiency, size, venting, and ductwork setting the final number. Compare all-in written quotes, confirm the installer is licensed, and ask about rebates and financing. When you are ready, call Aire One East at 905-576-7600 or book a free in-home quote.
Related reading
- Should I repair or replace my furnace?
- Furnace replacement cost and process in Whitby
- Furnace repair in Oshawa
- How to choose the best HVAC company in Durham Region
Sources and references
- ENERGY STAR Canada, Natural Resources Canada
- Technical Standards and Safety Authority (TSSA), Ontario fuels safety
- City of Oshawa, permits and local services
Pricing and program details verified July 2026 and subject to change. Confirm rebate amounts before starting a project.
