Proudly Family-Owned
Heat pumps and furnaces solve the same problem in fundamentally different ways: a furnace burns fuel to generate heat, while a heat pump uses electricity to move heat from one place to another. Which is right for your home depends on your climate, your budget, and — for a lot of Ontario homes — whether the real answer is actually “both.”
How Does a Heat Pump Work?
A heat pump doesn’t generate heat, it transfers it. Using a refrigerant and a compressor, it extracts heat from the outdoor air (or ground, or water) and moves it inside your home in winter. In summer, the process reverses — the heat pump pulls heat out of your home, working like an air conditioner.
Three types of heat pumps:
- Air-source heat pumps (ASHPs) — the most common type, extracting heat from outside air even in cool temperatures. Generally the most affordable to install.
- Ground-source heat pumps (GSHPs), also called geothermal — draw heat from the ground via buried pipes. Highly efficient, but installation costs are meaningfully higher due to the excavation required.
- Water-source heat pumps — extract heat from a nearby body of water. Rare for residential use in Ontario; more common in commercial buildings.
How Does a Furnace Work?
A furnace generates heat through combustion — typically burning natural gas, propane, or oil, or using electric resistance heating. That heat warms air, which is distributed through your home via ductwork.
Four types of furnaces:
- Gas furnaces — the most common type. Modern high-efficiency models reach up to 98% AFUE.
- Electric furnaces — cheaper to install, but typically more expensive to operate due to electricity costs relative to gas.
- Oil furnaces — less common today, still used in some areas without gas service. Powerful heating output, but require regular fuel deliveries and maintenance.
- Propane furnaces — function like gas furnaces but run on propane, common in rural areas without natural gas access.
Heat Pump vs. Furnace: The Real Comparison
Energy Efficiency
Heat pumps are generally more efficient than furnaces because they move heat rather than generate it. In good conditions, a heat pump can produce roughly 3–4 units of heat for every unit of electricity it consumes — commonly described as 300–400% efficiency. That figure drops in colder weather, since the pump has to work harder to extract heat from cold air; averaged over a full Ontario heating season including cold snaps, realistic efficiency is closer to 200–300%.
Furnaces don’t have this variability. Modern gas furnaces reach up to 98% AFUE, and electric furnaces convert nearly 100% of electricity to heat — though electric furnaces’ high operating cost, driven by electricity pricing rather than efficiency, can offset that advantage.
Cold-Weather Performance
This is where the two systems diverge most, and it’s worth being precise rather than citing three different numbers in three different places.
Standard heat pumps lose meaningful efficiency as outdoor temperatures drop, and many older or standard models need backup heat once temperatures fall into the range of roughly -15°C to -20°C. Cold-climate heat pumps — a newer, more capable category — are designed to maintain reasonable efficiency down to roughly -25°C to -30°C, depending on the specific model. Manufacturer specifications vary meaningfully between models, so this is a genuine “check the spec sheet” situation, not a single number that applies to every heat pump.
Furnaces don’t have this limitation — gas furnaces in particular maintain consistent output regardless of how cold it gets outside, which is exactly why they’ve been the default choice in Ontario for decades.
Installation and Maintenance Costs
Heat pumps typically cost more upfront than a furnace, and ground-source systems cost meaningfully more still due to excavation. Lower operating costs can offset this over time, and maintenance is generally less intensive than a furnace’s — though heat pumps still need regular inspection of refrigerant levels and defrost cycles.
Furnaces generally have lower upfront costs, particularly gas and electric models. Gas furnaces specifically require annual inspection for safe operation — carbon monoxide risk from a poorly maintained furnace is a real safety issue, not just a performance one.
Environmental Impact
Heat pumps produce fewer direct emissions since they don’t burn fuel — and if the electricity powering them comes from a cleaner grid, their footprint drops further. Gas and oil furnaces emit carbon dioxide directly through combustion. Electric furnaces sit in between: no direct combustion emissions, but their footprint depends entirely on how the electricity was generated.
Comfort
Heat pumps tend to deliver steadier, more even heat without the temperature swings some furnaces produce, and they’re generally quieter. Furnaces heat a space faster and are very effective in extreme cold, though uneven ductwork can create hot and cold spots if it isn’t properly balanced.
Do You Need a Furnace With a Heat Pump? Hybrid and Dual-Fuel Systems
This is genuinely the most common question homeowners have once they start comparing these two systems, and it deserves a real answer rather than a one-line mention.
A dual-fuel (hybrid) system pairs a heat pump with a furnace, and the two work together automatically rather than as a strict either/or choice. The heat pump handles heating during mild-to-moderate weather — spring, fall, and most of a typical winter day — since that’s where it’s most efficient. When outdoor temperatures drop below a set threshold (commonly somewhere in the -10°C to -18°C range, depending on the specific heat pump and how the system is configured), it automatically switches over to the furnace, which doesn’t lose efficiency in extreme cold the way a heat pump does.
Why this matters specifically for Ontario: the province’s climate is a genuinely good match for this approach. Ontario winters include long stretches of mild-to-moderate cold where a heat pump runs efficiently, punctuated by real cold snaps where a furnace’s consistent output matters. A dual-fuel system is built around exactly that pattern, rather than asking one piece of equipment to be optimal across the entire range.
What this means practically:
- You get the heat pump’s efficiency and lower operating cost most of the year
- You get the furnace’s reliable output during the coldest stretches, without the heat pump straining or needing resistance-heat backup
- The switchover is automatic — you’re not manually swapping systems
- Total installed cost is higher than either system alone, since you’re installing two pieces of equipment, but the combined operating savings over a full winter can offset a meaningful share of that difference
Who this is genuinely a good fit for: most homeowners already using a furnace and considering a heat pump addition, rather than a full heat-pump-only replacement — particularly for anyone who wants the efficiency upside without fully depending on a heat pump through Ontario’s coldest weeks.
Heat Pump vs. Furnace Costs
Installed cost ranges vary by home size, system type, and installation complexity, but as a general Ontario planning guide:
- Air-source heat pumps: roughly $4,000–$8,000 installed
- Ground-source (geothermal) heat pumps: meaningfully higher, largely due to excavation costs
- Gas or electric furnaces: roughly $3,000–$6,000 installed
- Dual-fuel systems: higher combined cost than either system alone, since two pieces of equipment are being installed
Operating costs depend on your specific electricity and gas rates, which change over time — get a current comparison for your actual usage rather than relying on a fixed percentage that may already be stale.
On rebates: Ontario’s rebate landscape for heat pumps has changed multiple times in the last few years, and program names and dollar amounts from even a year or two ago are frequently no longer accurate. Rather than quote a specific figure here that risks being wrong by the time you read it, see our current guide to Ontario home heating rebates for what’s actually available today, or contact us and we’ll confirm your eligibility directly.
Which Should You Choose?
- Mild-to-moderate climate, minimal extreme cold: a heat pump alone is often the most efficient, cost-effective choice.
- Regular extreme cold snaps: a furnace, or a dual-fuel system pairing a heat pump with furnace backup, is the safer bet for reliable heat.
- Tight budget, lower upfront cost priority: a furnace typically costs less to install.
- Priority on reducing emissions: a heat pump is the greener option, more so if your electricity comes from cleaner generation.
- Already have a working furnace and want efficiency gains without full replacement: a dual-fuel setup is worth a serious look.
There’s no universally “right” answer — it depends on your specific home, your existing equipment, and your priorities. Contact us for an assessment based on your actual house, not a generic rule of thumb.
FAQs
Air-source heat pumps typically run $4,000–$8,000 installed; furnaces typically run $3,000–$6,000. Heat pumps can offer lower operating costs over time depending on your electricity and gas rates, which change regularly — get a current comparison for your specific home rather than relying on a fixed percentage claim.
Heat pumps handle both heating and cooling from one system, generally cost less to run in mild-to-moderate weather, and produce fewer direct emissions. They're a strong fit for Ontario's shoulder seasons and most of a typical winter, though very cold stretches are where a furnace or a dual-fuel setup has the advantage.
Yes — this is called a dual-fuel or hybrid system, and it's a genuinely common, well-established approach in Ontario. The heat pump handles day-to-day heating efficiently, and the system automatically switches to the furnace during extreme cold, when a heat pump's efficiency drops the most.
Standard heat pumps lose meaningful efficiency as temperatures drop toward -15°C to -20°C. Cold-climate heat pump models are designed to keep working efficiently down to roughly -25°C to -30°C, but specifications vary by manufacturer and model — check the actual spec sheet rather than assuming all heat pumps perform the same in deep cold.
Confirm TSSA certification for any gas-related work and ESA certification for electrical work — both are the real, verifiable Ontario licensing standards. Ask directly about a company's experience with your specific system type, and get quotes in writing rather than relying on a verbal estimate.
Heat pumps typically last 12–15 years; furnaces typically last 15–20 years with regular maintenance. Both figures assume proper annual servicing — skipping maintenance shortens either system's realistic lifespan.
Heat pumps generally need biannual attention (coil cleaning, refrigerant checks, since they run in both heating and cooling modes), while furnaces typically need annual filter changes and a safety inspection. Neither is "low maintenance" — both need a proper schedule to perform reliably and safely.
Rebate programs and amounts change frequently — a specific dollar figure quoted even a year ago is very likely out of date today. See our current Ontario home heating rebates guide for accurate, up-to-date figures rather than relying on an older source.
Yes — heat pumps run entirely on electricity, making them a genuine option for homes without gas service. This is one of the more straightforward cases for a heat pump alone, without needing a dual-fuel setup.