Heat Pump vs Gas Furnace in Ontario: Costs, Rebates & When to Switch

For most Ontario homeowners, a cold-climate heat pump will cost less to run than a gas furnace over the long term — and 2026 rebates can significantly offset the higher upfront price. But gas furnaces still make sense in certain situations. Here's how to think through the decision for your home.

Why This Decision Is More Nuanced Than It Looks

The "heat pump vs. gas furnace" debate has become a fixture of home renovation conversations across Ontario, and for good reason. Energy prices shift. Rebate programs open and close. And the technology itself has changed dramatically — modern cold-climate air-source heat pumps (CCASHPs) are rated to operate effectively down to -25°C to -30°C, putting to rest the old concern that they couldn't handle a real Ontario winter.

At the same time, natural gas furnaces aren't going anywhere. There is no gas furnace ban in Ontario in 2026. New units must now meet a minimum 95% AFUE (annual fuel utilization efficiency) rating under Canada's federal Energy Efficiency Regulations (Amendment 15) — a step up from the previous 90% AFUE floor — but gas heat remains a fully legal and widely available option.

The real question isn't which technology is objectively better. It's which one makes more sense for your home, your fuel source, and your financial situation.

Running Costs: Heat Pump vs. Gas Furnace

This is where the comparison gets genuinely interesting — and where your current fuel type matters enormously.

Heat pumps don't generate heat by burning fuel; they move heat from outside air into your home. At moderate temperatures, a quality CCASHP can deliver three to four units of heat energy for every one unit of electricity it consumes. That ratio is called the coefficient of performance (COP), and it's why heat pumps can be dramatically cheaper to run than resistance electric heat.

The comparison with natural gas is more context-dependent:

A 95% AFUE gas furnace is genuinely efficient at converting gas to heat. But it still relies on combustion, still produces carbon monoxide, and — as of January 1, 2026 — Ontario Regulation 87/25 under the Ontario Fire Code now requires every home with a gas-burning appliance to have a working carbon monoxide alarm on every storey, including the basement. That's a stricter requirement than the previous rule, and worth factoring into your maintenance checklist if you keep or install a gas furnace.

2026 Rebates: What's Actually Available

The rebate landscape has shifted in the past year. Here's an honest summary of what Ontario homeowners can access in 2026.

Home Renovation Savings Program

This is Ontario's primary rebate vehicle for heat pumps right now, delivered by Enbridge Gas and Save on Energy and backed by the Ontario government. It's confirmed running through November 2026. Rebate amounts for cold-climate air-source heat pumps are tiered by your current fuel source:

No pre-retrofit energy audit is required for the single-upgrade path. Units must appear on NRCan's qualified products list and meet minimum efficiency standards (HSPF2 ≥ 8.1, SEER2 ≥ 15.2 for federal programs). Full details are at homerenovationsavings.ca.

Oil to Heat Pump Affordability (OHPA) Program

If your home currently heats with oil, the federal OHPA program can stack with the Home Renovation Savings Program, potentially bringing combined support to $15,000 or more. NRCan notes July 31, 2026 as a key deadline for some provinces — verify your Ontario eligibility directly before applying.

Canada Greener Homes Grant and Loan

Both are closed to new applicants as of 2025–2026. Don't plan around them.

Enbridge Home Efficiency Rebate

The standalone HER program ended new intake in January 2025 and has been replaced by the Home Renovation Savings Program. Enbridge still offers a $75 instant rebate on smart thermostats for eligible residential gas customers under the new program.

What about gas furnace rebates?

There are currently no comparable provincial or federal rebate programs for installing a new gas furnace. If you're replacing an aging gas furnace with a new high-efficiency model, you're paying full cost.

Side-by-Side Comparison

When a Gas Furnace Still Makes Sense

Despite the rebate advantages of heat pumps, there are real scenarios where a gas furnace is the more practical choice in 2026:

When a Heat Pump Is the Stronger Choice

Getting the Installation Right

Whichever system you choose, the quality of the installation matters as much as the equipment. An undersized heat pump will struggle in a cold snap. An improperly commissioned gas furnace can be dangerous.

For heat pumps, look for an HVAC contractor who performs a proper Manual J load calculation — not just a rule-of-thumb sizing estimate — and who can confirm the unit is on NRCan's qualified products list if you're claiming rebates. For gas furnaces, the contractor must be licensed and the work must be inspected to meet TSSA requirements.

You can find HVAC contractors across Ontario on ProScore, or search by city — including HVAC contractors in Toronto, Ottawa, Hamilton, and London. ProScore's Trust Index scores contractors on reputation, verified credentials, customer sentiment, and business transparency — so you can see at a glance which contractors have a track record worth relying on.

If your heat pump installation requires an electrical panel upgrade (common in older homes switching from gas), you'll also want a licensed electrician. Find electricians across Ontario on ProScore.

FAQ

Do cold-climate heat pumps actually work in Ontario winters?

Yes. Modern CCASHPs are rated for effective operation down to -25°C to -30°C, which covers the vast majority of Ontario winter conditions. Most manufacturers also include an auxiliary electric heating element for extreme cold snaps, ensuring comfort even on the coldest nights.

Can I claim rebates if I already have a gas furnace and just want to add a heat pump?

Yes, in many cases. The Home Renovation Savings Program covers heat pump installations in gas-heated homes, though the rebate amount is lower (up to roughly $2,000 for a typical ASHP) compared to non-gas homes. Some homeowners install a heat pump as the primary system and keep the gas furnace as a backup — this is sometimes called a dual-fuel or hybrid system.

What should I ask an HVAC contractor before getting a heat pump quote?

Ask whether they'll perform a Manual J load calculation, which specific models they're recommending and whether those models are on NRCan's qualified products list, whether your electrical panel needs upgrading, and what the total installed cost is after any rebates they'll help you claim. A contractor who can't answer these questions clearly is worth reconsidering.