Heat Pump vs Gas Furnace in Ontario: Real Costs, Real Numbers
We installed both. We service both. We are not picking a side. This page lays out the actual installed cost, monthly run cost, and 12-year total cost of ownership for a typical Mississauga home in 2026. No marketing, no spin.
12-year total cost of ownership
Based on a typical 2,000 sq ft Mississauga home, current Enbridge gas pricing ($0.42/m3), Ontario hydro pricing ($0.103/kWh average), and a 12-year ownership window. We use installed prices before rebates so the comparison is honest, then show the rebated number separately.
| Cost line | Gas furnace (96 AFUE) | Cold-climate heat pump | Hybrid (both) |
|---|---|---|---|
| Installed cost (before rebate) | $4,500 | $8,500 | $11,500 |
| Eligible rebate | Up to $1,000 | Up to $10,000 | Up to $10,000 |
| Net installed cost | $3,500 | Net $0 to $4,000 | $1,500 to $5,500 |
| Annual heating energy cost | $1,750 | $1,150 | $1,050 |
| Annual AC cost (included) | Separate AC $3,500 install | Included in heat pump | Included |
| 12-year energy total | $21,000 + AC unit cost | $13,800 | $12,600 |
| Maintenance over 12 years | $1,200 | $2,400 | $2,400 |
| 12-year all-in total | $25,700 plus AC | $16,200 to $20,200 | $16,500 to $20,500 |
Numbers assume a 2,000 sq ft Mississauga home with average insulation, R-2000 not required. Your actual numbers vary based on insulation, air-leakage, and how cold your winter runs. We provide site-specific numbers during a free in-home assessment.
Efficiency by outdoor temperature
A gas furnace burns fuel at the same efficiency regardless of outdoor temperature. A heat pump's efficiency scales with the temperature difference it works against. At mild temperatures, a heat pump moves three to four units of heat per unit of electricity. As temperatures drop, that ratio falls. Below is what a top-tier cold-climate heat pump actually delivers.
Mississauga sees roughly 15 to 20 days per year below minus 20 Celsius, and roughly 2 to 4 days below minus 25. For most of the heating season, a heat pump beats gas by a 2 to 3x margin.
When each option wins
Heat pump wins when
- Your AC is also at end of life and needs replacement anyway
- Your home has 200 amp electrical service or can be upgraded
- You qualify for full federal and provincial rebate stacking
- You plan to stay in the home 5+ years for payback
- You currently heat with oil, propane, or electric resistance
- You want one system that handles heating and cooling
Gas furnace wins when
- Your AC is fairly new (under 7 years) and works fine
- Your home has 100 amp service and panel upgrade is costly
- You plan to move within 2 years (payback window matters)
- You only need to replace heat, not cooling
- Your home has very weak insulation and high heat load
- You qualify for zero rebates (uncommon in Ontario 2026)
Why hybrid systems often win for Ontario
A hybrid system pairs a cold-climate heat pump with a backup gas furnace. The heat pump handles 85 to 92 percent of the heating season at high efficiency. The gas furnace takes over only when outdoor temperatures fall below the heat pump's economic crossover point, usually somewhere between minus 8 and minus 15 Celsius depending on local gas and hydro prices.
For a typical Mississauga home, hybrid runs about 90 to 150 hours per year on gas backup. The remaining 1,800 hours of heating come from the heat pump. You get the best of both: low average run cost plus rock-solid performance at minus 30 Celsius. The control board switches automatically based on outdoor temperature.
Hybrid systems qualify for the same federal and provincial rebates as full electric heat pump conversions. Net installed cost typically lands in the same range as a high-efficiency furnace plus a new AC, but with lower run cost and lower lifetime carbon. Read our are heat pumps worth it in Canada guide for the case-study math.
Real Mississauga case: Erin Mills bungalow, 2025 install
A 1,850 sq ft Erin Mills bungalow built in 1978. The homeowners had an 18-year-old AC and a 14-year-old 92 AFUE furnace, both nearing end of life. We installed a Lennox SL25XPV cold-climate heat pump paired with a new 96 AFUE Lennox SL297NV furnace as backup.
- Installed cost: $14,200 (heat pump + furnace + permit + thermostat)
- Rebates received: $7,000 Canada Greener Homes + $1,000 Enbridge = $8,000
- Net cost to homeowner: $6,200
- Year-1 energy savings vs old system: $1,180 (gas down 62 percent, hydro up 28 percent)
- Estimated 12-year savings: $14,000+ in energy plus avoiding a separate AC purchase
Numbers are real from a 2025 install. Names withheld for privacy. Available on request for verification during your free assessment.
Get the numbers for your home
We run the heat-pump vs gas comparison on your actual home: square footage, insulation, current utility bills, and rebate eligibility. Free in-home assessment, no obligation, no pressure.
Frequently Asked Questions
Got questions about HVAC services in the GTA? We've got answers.
Yes, in most months. A modern cold-climate heat pump runs at 250 to 350 percent efficiency through Ontario's heating season, while a 96 AFUE gas furnace runs at 96 percent. At current Enbridge gas pricing of $0.42 per cubic metre and Ontario hydro pricing of $0.103 per kWh off-peak, the average Mississauga home saves $400 to $900 per year on heating with a heat pump compared to a high-efficiency gas furnace.
Modern cold-climate heat pumps like the Mitsubishi Hyper-Heat, Lennox Signature SL25XPV, and Bosch IDS Ultra maintain rated capacity down to minus 25 to minus 30 Celsius. Below that, efficiency drops but the unit still produces heat. For homes that see frequent minus 30 nights, a hybrid system pairs the heat pump with a backup gas furnace or electric strip heat that takes over only at the coldest hours.
A cold-climate ducted heat pump runs $5,500 to $11,000 installed in Ontario before rebates. Ductless mini-split heat pumps run $4,500 to $8,000 for a single zone. After Canada Greener Homes Plus and Enbridge rebates of up to $10,000, the net cost typically lands between zero and $4,000 for a qualifying installation. We handle all rebate paperwork during installation.
It can, or it can pair with your existing furnace as a hybrid system. A full electric heat pump replaces both your AC and furnace if your home has adequate electrical service (200 amp typically required) and sufficient insulation. A hybrid system keeps your gas furnace as backup, runs the heat pump down to roughly minus 10 Celsius, and switches to gas during extreme cold. Hybrid systems work well for older homes with weaker insulation.
Canada Greener Homes Plus offers up to $7,000 for cold-climate heat pump installation. The federal Oil-to-Heat-Pump Affordability program adds up to $15,000 for households replacing oil heating. Enbridge runs a Home Efficiency Rebate Plus program that stacks up to $5,000 with the federal rebate. Total stack-up can reach $10,000 to $15,000 depending on your starting point and income level.
A quality cold-climate heat pump lasts 15 to 20 years in Ontario with proper maintenance. That is roughly the same lifespan as a high-efficiency gas furnace. The compressor is the most expensive component and the most failure-prone after year 12. Annual maintenance and a clean condenser coil extend life significantly. EcoFrost provides annual heat pump maintenance plans starting at $189.
Yes, but your gas bill drops more. For a typical 2,000 sq ft Mississauga home, switching from a 96 AFUE gas furnace to a cold-climate heat pump increases annual electricity use by roughly 4,500 to 6,500 kWh, costing $465 to $670 at current Ontario rates. The same home's gas use drops by roughly 1,800 cubic metres, saving $750 to $900. Net annual savings land between $400 and $900.
Not efficiently. A heat pump is essentially an AC that runs in reverse, so installing both is duplicate equipment. The right approach when your AC is at end of life is to replace it with a heat pump, which gives you AC in summer and primary heating in winter from the same unit. If your gas furnace is still good, the heat pump pairs with it as a hybrid system.
Modern cold-climate heat pumps run at 55 to 65 decibels at the outdoor unit, similar to a quiet conversation. Variable-speed inverter models run quieter than single-stage AC units. Indoor air handlers run between 40 and 50 decibels at low speed, quieter than a refrigerator. Older single-stage heat pumps can be louder, especially when defrost cycles run in winter.
Still have questions? We are here to help.