A gas furnace costs $4,000–$6,500 installed but only heats — you still need a separate AC. A heat pump costs $7,000–$18,000 but handles both heating and cooling in one system. Over 15–20 years, total cost is often similar or lower with a heat pump, especially after rebates. Here's the complete comparison.
Short answer: Choose a heat pump if you're replacing both heating and cooling, want lower operating costs, or heat with oil/propane/electric baseboard. Keep your gas furnace if natural gas is cheap in your area and you're not due for an AC replacement. A dual-fuel hybrid (heat pump + gas furnace) gives you the best of both worlds in cold climates.
| Factor | Gas Furnace + Central AC | Heat Pump (Ducted, Cold-Climate) |
|---|---|---|
| Equipment + install | $7,000–$13,000 (furnace + AC) | $9,000–$21,000 |
| Net cost after rebates | $7,000–$13,000 (minimal rebates) | $5,000–$15,000 (rebates of $1,500–$19,000) |
| Annual operating cost (1,800 sq ft) | $1,200–$2,000 | $800–$1,500 |
| Efficiency | 92–98% AFUE (furnace only) | 250–400% equivalent (COP 2.5–4.0) |
| Provides cooling | No — requires separate AC unit | Yes — built in |
| Lifespan | 15–20 years (each unit) | 15–20 years |
| Units to maintain | 2 (furnace + AC) | 1 |
| Performance at -25°C | Full output | 60–80% of rated capacity (backup may be needed) |
| Carbon emissions | 2–3 tonnes CO₂/year | Zero direct emissions (grid-dependent) |
| Energy source | Natural gas + electricity | Electricity only |
| Monthly gas bill | $80–$200/month in winter | $0 — no gas connection needed |
A gas furnace is cheaper to buy and install than a heat pump. A mid-efficiency furnace (96% AFUE) runs $4,000–$6,500 installed. But a furnace only heats — if you also need air conditioning, add another $3,000–$6,500 for a central AC unit, bringing the total to $7,000–$13,000.
A ducted cold-climate heat pump runs $9,000–$21,000 installed. That's more than a furnace alone, but it replaces both the furnace and the AC in a single system. When you compare the heat pump against the combined cost of furnace + AC, the gap narrows considerably.
Rebates narrow it further. In BC, income-qualified households can receive up to $19,000 toward a heat pump installation. Ontario's HRS program offers up to $7,500 for electric-heated homes. Gas furnaces receive minimal rebate support in most provinces. After rebates, a heat pump can actually cost less than a furnace + AC combo.
Use our Heat Pump Cost Guide for detailed pricing by system type and home size, and our Rebates Guide to see what's available in your province.
This is where heat pumps pull ahead. A heat pump delivers 2.5–4 units of heat for every 1 unit of electricity it consumes (COP of 2.5–4.0). A gas furnace, even at 96% efficiency, gets less than 1 unit of heat per unit of gas burned.
In practical terms for a typical 1,800 sq ft Canadian home:
| Heating System | Total |
|---|---|
| Gas furnace (96% AFUE) + central AC | $1,200–$2,000 |
| Heat pump (cold-climate, ducted) | $800–$1,500 |
| Electric baseboard + window AC | $2,300–$4,100 |
| Oil furnace + central AC | $2,200–$3,900 |
The savings depend heavily on local energy prices. In BC and Quebec, where electricity is cheap and hydro-powered, heat pumps save the most. In Alberta, where natural gas is cheap and electricity is relatively expensive, the gap is smaller — though heat pumps still win for homes currently on electric baseboard or oil.
Over a 15-year equipment lifespan, the operating cost difference between a heat pump and a gas furnace typically adds up to $3,000–$8,000 in savings for the heat pump.
Furnaces and heat pumps measure efficiency differently, which makes direct comparison confusing.
Furnaces use AFUE (Annual Fuel Utilization Efficiency). A 96% AFUE furnace converts 96% of the gas it burns into heat. The maximum possible is just under 100% — you can never get more heat out than fuel in.
Heat pumps use COP (Coefficient of Performance) or HSPF (Heating Seasonal Performance Factor). A COP of 3.0 means the heat pump produces 3 units of heat for every 1 unit of electricity consumed. This is possible because the heat pump moves existing heat rather than creating it from fuel.
In mild conditions (above 0°C), a cold-climate heat pump operates at COP 3.5–4.5 — effectively 350–450% efficient. As temperatures drop, efficiency decreases. At -15°C, expect COP 2.0–2.5. At -25°C, COP drops to 1.5–2.0. Even at reduced efficiency, the heat pump is still more efficient than electric resistance heating and often competitive with gas.
This is why dual-fuel hybrid systems make sense in the coldest parts of Canada. The heat pump handles 80–90% of the heating season efficiently, and the gas furnace kicks in only during the coldest days when the heat pump's COP drops below the breakeven point with gas.
This is the biggest concern for Canadian homeowners and the reason many contractors still default to recommending gas furnaces.
The reality in 2026: Cold-climate air-source heat pumps (ccASHP) are rated to operate at -25°C to -30°C. They don't stop working in cold weather — they just become less efficient as temperatures drop. At -15°C, a modern ccASHP maintains 70–80% of its rated heating capacity. At -25°C, it drops to 60–70%.
For most of southern Canada (where ~75% of the population lives), a properly sized cold-climate heat pump can handle the entire heating season. In colder regions (Prairies, Northern Ontario, Northern BC), a dual-fuel setup — heat pump + gas furnace — is the practical choice. The heat pump runs as the primary system 90–95% of the time, and the furnace automatically takes over during the coldest stretches.
The Canadian Climate Institute found that heat pumps beat gas furnaces on total lifetime cost in most Canadian cities, including Edmonton and Winnipeg, when properly sized for the climate.
Furnaces and heat pumps heat differently, and the comfort difference is noticeable.
Gas furnaces heat in cycles — the burner fires, blasts hot air (50–60°C) through the ducts, then shuts off until the temperature drops again. This creates noticeable temperature swings between cycles.
Heat pumps with inverter-driven compressors run continuously at variable speed, delivering a steady flow of moderately warm air (30–40°C). This produces more even temperatures with fewer hot and cold swings. Most homeowners who switch report that the heat pump feels more comfortable, though the air coming from the vents is noticeably less hot than from a furnace.
Heat pumps also dehumidify in summer more effectively than most central AC units, since they run at variable speed rather than cycling on and off.
A gas furnace burns fossil fuel directly in your home. A typical Canadian home with a gas furnace produces 2–3 tonnes of CO₂ per year from heating alone, plus methane leakage from the gas distribution system (estimated at 1–3% of total gas volume).
A heat pump runs on electricity and produces zero direct emissions. The actual carbon footprint depends on how your province generates electricity. In BC, Quebec, Manitoba, and Ontario (mostly hydro/nuclear), a heat pump is dramatically cleaner. In Alberta and Saskatchewan (more gas and coal in the grid), the benefit is smaller but still positive — and improves every year as the grid gets cleaner.
If reducing your carbon footprint matters to you, switching from a gas furnace to a heat pump is one of the single largest reductions a homeowner can make.
| Factor | Gas Furnace | Heat Pump |
|---|---|---|
| Typical lifespan | 15–20 years | 15–20 years |
| Annual maintenance | Furnace tune-up ($100–$200) + AC tune-up ($100–$200) | Single system tune-up ($150–$250) |
| Common repairs | Heat exchanger, ignitor, blower motor | Compressor, reversing valve, refrigerant charge |
| Safety concerns | Carbon monoxide risk from cracked heat exchanger | None — no combustion |
| End-of-life replacement | Replace furnace and AC separately (2 purchases) | Replace one system |
Both systems last about the same length of time. The maintenance advantage for heat pumps is that you're servicing one system instead of two.
For most Canadian homes, yes. A heat pump replaces both your furnace and AC in one unit, has lower operating costs in most provinces, and qualifies for significant rebates ($1,500–$19,000 depending on province and income). The math is strongest for homes currently on oil, propane, or electric baseboard heating. For homes with cheap natural gas, the savings are smaller but the heat pump still usually wins on total lifetime cost when you account for replacing both furnace and AC.
In most of southern Canada, yes. Modern cold-climate heat pumps are rated to -25°C to -30°C and maintain the majority of their heating capacity at those temperatures. For the coldest regions (Prairies, Northern Ontario), a dual-fuel hybrid — heat pump as primary, gas furnace as backup — is the practical choice and still reduces gas usage by 50–70%.
A heat pump costs $9,000–$21,000 installed vs $4,000–$6,500 for a gas furnace alone. However, a furnace doesn't cool your home — adding central AC brings the total to $7,000–$13,000. After rebates (which are available for heat pumps but rarely for furnaces), the net cost difference is often small, and in some cases the heat pump is cheaper.
It depends on local energy prices. In BC and Quebec (cheap hydro electricity), a heat pump costs 20–40% less to operate than a gas furnace. In Ontario, costs are roughly comparable. In Alberta (cheap gas, expensive electricity), a gas furnace can be slightly cheaper to operate — though a dual-fuel hybrid often beats both.
A dual-fuel system pairs a heat pump with a gas furnace. The heat pump runs as the primary heater most of the time, and the gas furnace automatically kicks in when outdoor temperatures drop below a setpoint (typically -10°C to -15°C, depending on local energy prices). This gives you the efficiency of a heat pump for 80–90% of the heating season with the reliability of gas backup for the coldest days.
Compared to a gas furnace + AC combo, payback is typically 5–10 years when you factor in operating cost savings and rebates. Compared to oil or electric baseboard heating, payback can be as fast as 2–5 years. The exact timeline depends on your current system, local energy prices, and the rebates you qualify for. Use our Heat Pump Size Calculator to estimate costs for your specific home.