Suitability by Fuel Type
Key Considerations
Full Comparison Table
| Fuel Type | Suitability Score | Typical AFUE | Est. Annual Cost |
|---|
How to Use the Furnace Selection Calculator
Toggle off any fuel type that isn't available at your property. Rural homes without gas service, for example, should turn off natural gas.
Check a recent utility bill for accurate natural gas, propane, and electricity rates. These drive the annual operating cost comparison.
Choose the Canadian city closest to your home. Colder climates with more heating degree days burn through more fuel each winter, which widens the cost gap between fuel types.
Choose whether upfront cost or annual operating cost matters more, then click Compare Furnace Options to see a suitability score and cost estimate for each fuel type.
Choosing the Right Furnace Fuel Type
Furnace selection in Canada usually comes down to what fuel is available at your property first, then cost and efficiency second. Not every home has a choice between all three fuel types, so this calculator starts by asking which ones you can actually access.
Natural Gas Furnaces
Where natural gas service is available, it's typically the lowest-cost fuel per unit of delivered heat across most of Canada. Gas furnaces range from mid-efficiency units around 80 percent AFUE to high-efficiency condensing models in the 95 to 98 percent range, and ENERGY STAR's furnace buying guidance notes that higher-AFUE models pay back their extra upfront cost through lower energy bills over time. Condensing furnaces cost more upfront but recover extra heat from exhaust gases, which pays off faster in colder climates with long heating seasons.
Propane Furnaces
Propane fills the gap for homes outside natural gas utility service areas, which is common in many rural parts of Canada. It burns similarly to natural gas and uses comparable furnace equipment, but the fuel itself costs more per unit of heat since it's delivered and stored in a tank rather than piped in. Since both gas and propane furnaces rely on proper combustion, check any planned installation against a combustion air calculator to confirm the space has adequate air supply. It's still generally cheaper to run than electric resistance heat.
Electric Furnaces
Electric resistance furnaces are available everywhere electricity reaches, which makes them the default in areas without gas or practical propane delivery. They have no combustion, no venting, and a lower equipment cost, but resistance electric heat is typically the most expensive way to heat a home on a cost-per-unit-of-heat basis in most provinces. Homeowners set on staying fully electric often compare an electric furnace against a cold-climate heat pump instead, since Natural Resources Canada's heat pump guidance notes a heat pump delivers more heat per unit of electricity consumed.
Weighing Upfront Cost Against Annual Cost
A furnace is a long-term purchase, typically lasting 15 to 20 years, so the fuel type with the lowest sticker price isn't always the cheapest choice over its lifespan. Run your specific rates through a fuel cost comparison calculator alongside this tool's estimate, which uses your local utility rates and climate zone so you can weigh that against the upfront cost difference between fuel types.
Furnace Versus Heat Pump
If you have access to natural gas but are curious whether an all-electric option makes more sense, compare these furnace results against the heat pump selection calculator. Many homeowners also keep an existing furnace and add a heat pump in a dual fuel configuration. The dual fuel calculator finds the outdoor temperature where switching between the two makes the most economic sense.
A Note on This Comparison
This tool compares fuel type categories using typical efficiency ranges and your entered utility rates. Actual costs vary by specific equipment, installation quality, home insulation, and thermostat settings. Get quotes from licensed contractors to confirm final equipment selection and sizing for your home.
Frequently Asked Questions
In most of Canada, natural gas costs less per unit of delivered heat than electricity used in resistance electric furnaces, so gas furnaces typically have lower annual operating costs where gas service is available. The gap depends heavily on local utility rates, which vary significantly by province and utility. Electric furnaces have a lower upfront equipment cost and no combustion venting, which can offset some of the higher operating cost over time.
Propane furnaces make sense in rural and off-grid areas without natural gas service, since propane can be delivered and stored on-site in a tank. Propane typically costs more per unit of heat than natural gas, but it is usually cheaper to run than an electric resistance furnace, making it a common choice for rural Canadian homes outside gas utility service areas.
Annual Fuel Utilization Efficiency, or AFUE, measures how much of the fuel's energy converts to usable heat over a year. High-efficiency condensing furnaces in the 95 to 98 percent AFUE range recover extra heat from exhaust gases and are common in new installations. Mid-efficiency furnaces in the 80 to 85 percent range cost less upfront but waste more fuel as exhaust heat, which matters more in cold Canadian climates with long heating seasons.
It depends on your climate, budget, and electricity rates. A cold-climate heat pump can often replace a furnace entirely in milder parts of Canada, or work alongside one in a dual fuel setup in colder regions. Use the heat pump selection calculator to compare heat pump types against the furnace options here before deciding.
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