Compare
Furnace vs Heat Pump in Ontario: Which Should You Get?
Our take
Heat pump (with optional gas backup) for most GTA homes — lower lifecycle cost when rebates are stacked, and you also get cooling.
Side by side
| Factor | High-Efficiency Gas Furnace | Cold-Climate Heat Pump |
|---|---|---|
| Upfront install (typical GTA, mid-tier) | $5,000–$7,500 | $11,000–$16,000 (before rebates) |
| Net upfront after Ontario rebate stack | $5,000–$7,500 | $3,500–$8,000 (rebates ~$5K–$10K) |
| Heating only? | Yes — needs separate AC | No — heats AND cools |
| Annual operating cost (typical 2,000 sq ft) | $1,200–$1,700 gas + $300 cooling = $1,500–$2,000 | $900–$1,400 (heating + cooling) |
| Performance below -20°C | 100% rated capacity | 70–85% (cold-climate models) |
| Lifespan | 15–20 years | 15–18 years |
| Replaces AC? | No | Yes |
| Carbon footprint | High (gas combustion) | Low (Ontario grid is ~85% nuclear/hydro/wind) |
High-Efficiency Gas Furnace wins when:
- You're replacing on emergency and need it fast (gas furnace install is faster)
- Your electrical panel can't accept the load and the upgrade isn't economical
- You're selling within 3 years (heat pump payback is 7–12 years)
- Off-grid or unreliable electricity
Cold-Climate Heat Pump wins when:
- You also need AC (one system replaces two)
- You can stack Greener Homes + Enbridge HER+ rebates ($10–13K off)
- You care about emissions / future-proofing
- You're staying long-term
The full take
The straight answer: most GTA homes today are better off with a cold-climate heat pump. Three reasons.
First, you replace TWO systems with one. A new furnace + new AC is usually $9,000–$12,000 combined; one heat pump is $11,000–$16,000 before rebates and net often less after the rebate stack.
Second, the operating cost favours heat pumps in Ontario because our grid is mostly nuclear, hydro, and wind — clean and relatively cheap. A heat pump moves 3–4 units of heat for every 1 unit of electricity, so you're effectively paying ~$0.04/kWh of heat. Gas at 2026 prices works out to about $0.05/kWh-equivalent in a 96% AFUE furnace.
Third, future-proofing. Federal and provincial policy is clearly leaning electric. Carbon pricing pushes gas costs up over time. Heat pumps have only gotten better in the last 5 years.
The case FOR a furnace: you're replacing in an emergency and need it tomorrow, you're selling within 3 years, or your electrical panel can't easily accept the load. We'll be honest about which one your situation needs.
A hybrid system (heat pump + gas backup furnace) is often the best of both — heat pump runs above -15°C, furnace takes over below. Highest comfort, lowest annual operating cost, but ~30% higher upfront because you have two systems.
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Mississauga, ON · Greater Toronto Area and up to 2 hours out — London, Kitchener, Barrie, Kingston, Niagara.