Cold-Climate Heat Pump vs Gas Furnace in Ontario: 2026 Guide

For most Ontario homeowners, a cold-climate heat pump will cost less to run than a gas furnace — but the right answer depends on your current fuel source, your home's insulation, and how cold your winters actually get. Read on for a clear breakdown.

Why This Decision Is More Complicated in Ontario Than Anywhere Else

Ontario sits in a unique position. Our winters are genuinely cold — Ottawa regularly dips below −20 °C, Hamilton and London see sustained freezes, and even Toronto has multi-week stretches well below −10 °C. For years, that made a high-efficiency gas furnace the default choice. A heat pump? That was for milder climates.

That calculus has shifted. Cold-climate air-source heat pumps (ccASHPs) from major manufacturers now maintain rated heating capacity down to −25 °C or colder. At the same time, natural gas prices have risen, electricity rates have restructured, and Ontario's rebate landscape has changed significantly. The decision deserves a fresh look.

How Each System Actually Works in an Ontario Winter

Gas furnace: Burns natural gas (or propane) to generate heat directly. A new unit installed in Canada today must meet a minimum 95% AFUE rating — a federal requirement under NRCan's Energy Efficiency Regulations that took effect recently, meaning only high-efficiency condensing units are now available for new installations. That's actually good news: 95% AFUE means 95 cents of every dollar of gas burned becomes usable heat.

Cold-climate heat pump: Moves heat from outdoor air into your home rather than generating it by combustion. Because it's moving heat rather than making it, a quality ccASHP can deliver two to three units of heat energy for every unit of electricity it consumes — a coefficient of performance (COP) well above 1.0 even in cold weather. At −15 °C, a well-specified unit might still operate at a COP of 1.8 to 2.2, meaning it's still significantly more efficient than straight electric resistance heat.

The hybrid option: You don't have to choose. A ccASHP can be paired with your existing gas furnace as a backup — the heat pump handles the bulk of the heating load, and the furnace takes over only on the coldest nights. This dual-fuel setup is popular in Ontario because it hedges against both extreme cold and electricity price spikes.

Running Costs: What Ontario Homeowners Are Actually Paying

This is where things get personal, because your bill depends on three variables: your current fuel (natural gas, propane, oil, or electricity), your local utility rates, and your home's heat loss.

If you're currently on natural gas: Natural gas remains one of the cheaper heating fuels per unit of energy in Ontario. A well-insulated home with an Enbridge Gas connection and a new 95% AFUE furnace will have a relatively low heating bill. Switching to a heat pump only makes financial sense if your electricity rate (including time-of-use or tiered pricing from your local utility) produces a lower effective cost per unit of heat delivered — and that math is tighter for gas customers than for those on oil or propane.

If you're on oil, propane, or electric baseboard: The case for a heat pump is much stronger. Heating oil and propane are expensive per unit of energy, and electric baseboard is essentially 100% efficient at converting electricity to heat — meaning a heat pump at 200–250% efficiency cuts your heating electricity consumption roughly in half. Many homeowners switching from oil or propane to a ccASHP report meaningful annual savings even before rebates.

A note on Ontario electricity rates: Time-of-use (TOU) pricing means running your heat pump heavily during off-peak hours (evenings, weekends, overnight) reduces your effective rate. Smart thermostats — Enbridge Gas offers a $75 instant rebate to residential customers on qualifying models — can help automate this. Ultra-low overnight rates on some Ontario utilities make overnight pre-heating strategies viable.

Carbon pricing: The federal carbon price applies to natural gas in Ontario. As carbon pricing evolves, gas heating costs will continue to reflect that policy signal. Electricity in Ontario is largely low-carbon (nuclear and hydro dominant), so heat pumps benefit from a cleaner grid.

Rebates Available in Ontario Right Now (2026)

This is the most important financial lever for most homeowners, and it changed significantly in 2026.

The Canada Greener Homes Grant and Loan are both closed to new applicants. The grant ended mid-2024; the loan closed to new applications in 2025. If you submitted an application before those cutoffs, it continues to be processed — but new applicants cannot access those programs. Source: Natural Resources Canada.

The Home Renovation Savings Program is the main rebate available now. Delivered jointly by Save on Energy and Enbridge Gas and backed by the Ontario government, this program is confirmed through November 2026. It offers:

The rebate rate depends on your current fuel source, which is a critical detail:

So if you're an Enbridge Gas customer, your maximum air-source heat pump rebate is roughly $2,000 — meaningful, but not transformative. If you're heating with oil, propane, electric baseboard, or wood, you can access up to $7,500, which significantly changes the payback calculation.

Source: Home Renovation Savings Program.

No pre-retrofit energy audit is required if you're only doing the heat pump upgrade (the single-upgrade path). That removes a barrier that tripped up many homeowners under the old federal program.

Hybrid systems qualify. If you add a ccASHP alongside your existing gas furnace without removing the furnace, you still qualify for the rebate. This is the lowest-risk entry point for gas customers who want to reduce their gas consumption without fully committing to an all-electric heating system.

Eligibility basics: The program covers single-detached, semi-detached, row houses, townhomes, and mobile homes on permanent foundations occupied more than six months per year. Condos, stacked townhomes, and homes served by Cornwall Electric are excluded. The heat pump must appear on NRCan's qualified products list and be installed by a registered contractor.

When a Gas Furnace Still Makes Sense

A heat pump isn't automatically the right answer. Here are situations where a gas furnace replacement is the more practical choice in 2026:

One regulatory note for gas furnace owners: As of January 1, 2026, Ontario Regulation 87/25 under the Ontario Fire Code requires a working carbon monoxide alarm on every storey of any home with a gas-burning appliance, including the basement — expanded from the previous requirement of only outside sleeping areas. Source: Ontario Fire Code update. If you're keeping or installing a gas furnace, confirm your CO alarm coverage meets the new standard.

When a Cold-Climate Heat Pump Makes Sense

Finding the Right Contractor for Either System

Whether you choose a heat pump or a gas furnace, installation quality is everything. A heat pump undersized for your heat loss will struggle in January. A gas furnace improperly vented is a safety hazard. Either system poorly commissioned will cost you money for years.

In Ontario, HVAC work involving gas appliances must be performed by a licensed gas technician registered with the Technical Standards and Safety Authority (TSSA). Heat pump electrical connections must comply with the Electrical Safety Authority (ESA). Always confirm your contractor holds the appropriate credentials before work begins.

ProScore has scored 16,400+ Ontario contractors across 10+ data sources and 20+ trust signals, including HVAC specialists across the province. You can browse HVAC contractors across Ontario or search by city — for example, HVAC contractors in Ottawa, HVAC contractors in Hamilton, or HVAC contractors in London — and see each contractor's ProScore Trust Index tier before you call.

The Trust Index blends a contractor's verified credentials, reputation, customer sentiment, and business transparency into a single score. Elite and Trusted tier contractors have demonstrated consistency across all four inputs — that's the kind of installer you want making a decision that affects your home's comfort and your energy bills for the next 15 to 20 years.

FAQ

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

Yes. Modern cold-climate air-source heat pumps are rated to maintain full or near-full heating capacity down to −25 °C or colder, covering the vast majority of Ontario winter conditions. Performance does decrease at extreme temperatures, which is why many Ontario homeowners pair a heat pump with a gas furnace backup (a hybrid system) for added resilience on the coldest nights.

What rebates are available for heat pumps in Ontario in 2026?

The main program is the Home Renovation Savings Program, confirmed through November 2026, offering up to $7,500 for a cold-climate air-source heat pump (for non-gas homes) or up to roughly $2,000 for Enbridge Gas customers, and up to $12,000 for ground-source heat pumps. The Canada Greener Homes Grant and Loan are both closed to new applicants as of 2026.

Can I keep my gas furnace and add a heat pump?

Yes — this is called a hybrid or dual-fuel system. The heat pump handles most of the heating load, and the gas furnace acts as backup on the coldest days. Hybrid systems qualify for the Home Renovation Savings Program rebate without requiring you to remove the furnace, making it a lower-risk way to access rebates and reduce gas consumption.