Heat Pump vs Gas Furnace in Toronto: How to Decide (2026)
Last updated: By HeatPumpIndex Evidence Desk
Neither wins outright. A heat pump replaces both the furnace and the air conditioner, runs on electricity, and loses output as the temperature drops. A gas furnace is cheaper to install in a house already on gas and delivers the same heat at any outdoor temperature. The deciding factors are your electrical panel, your duct sizing, and the gap between local gas and electricity rates.
Beyond the price gap, HeatPumpIndex's own dataset lists 221 heat pump installers across the Greater Toronto Area at an average Google rating of 4.82★ over 246,748 reviews (August 2026), so you can move straight from this verdict to a ranked shortlist of pros who do the work.
Heat pump against Gas furnace, line by line
HeatPumpIndex built this side-by-side from researched GTA pricing data, with every figure traceable to a named Canadian source in the cell that cites it.
| Criterion | Heat pump | Gas furnace |
|---|---|---|
| What it replaces | Furnace and air conditioner in one system, heating and cooling from the same equipment | The furnace only. Cooling still needs a separate air conditioner |
| Fuel | Electricity. Cost tracks your electricity rate and the time of day you use it | Natural gas, plus a small amount of electricity for the blower and controls |
| Cold weather output | Capacity falls as the outdoor temperature drops. Cold climate models hold capacity much further down | Output is the same on the coldest night of the year as on a mild one |
| Electrical work | Needs a load calculation. Some homes need a panel or service upgrade, which the quote must state | Minimal. The blower and controls run on an existing circuit |
| Ductwork | Moves a larger volume of cooler air, so ducts sized for furnace temperatures sometimes need modification | Reuses existing ducts in a like for like replacement |
| Comfort | Long, steady runs at a lower supply temperature, so less temperature swing between cycles | Shorter bursts of hotter air, which most people notice as a bigger swing |
| Combustion and venting | No combustion, no flue and no combustion byproducts from the appliance | A combustion appliance: needs venting, and Ontario requires a carbon monoxide alarm nearby |
| Running hours | Runs year round for both heating and cooling, so it accumulates hours faster | Runs in the heating season only |
| Rebates | Rebates are available on qualifying systems. The amount depends on the equipment and the home, so confirm eligibility before you sign | Check what currently applies to gas equipment rather than assuming either way |
| Licensed trades | Electrical work by a licensed electrical contractor, notified to the Electrical Safety Authority | Gas work by a TSSA certified gas technician |
The house that should buy a heat pump
Choose a heat pump when you need cooling anyway, when the air conditioner is near the end of its life at the same time as the furnace, or when you want to stop burning gas in the house. It is the option that does two jobs with one piece of equipment, and the one rebate programs are built around.
- Your air conditioner and furnace are both due, so you are buying two systems anyway.
- The electrical panel has capacity, or the quote prices the upgrade honestly instead of hiding it.
- You want steadier room temperatures and are willing to accept longer, quieter run cycles.
- You have no gas service at the property, which removes the furnace's main cost advantage.
The house that should buy a gas furnace
Choose a gas furnace when the house already has gas service, the existing air conditioner is fine, and the panel has no room to spare. It is the cheaper and simpler swap, and it delivers full output on the coldest night without a backup strategy.
- The furnace failed on its own and the air conditioner still has years left in it.
- The electrical panel is full and an upgrade would cost more than the heating equipment.
- You want output that does not vary with outdoor temperature and no balance point to think about.
- You are not ruling out a heat pump later: a dual fuel setup can add one to the furnace you install now.
What does each cost on a real project?
Two quotes for the same Toronto house rarely differ on the equipment alone. These are the line items that actually separate them, and each one should appear on the written quote:
- Heating capacity
- From a heat loss calculation
- Electrical service
- Load calculation, then upgrade or not
- Ductwork
- Reused, modified, or replaced
- Cooling
- Included, or a separate purchase
- Backup heat
- Electric, gas, or none
A quote that names a model, states its capacity, and shows the calculation behind that capacity can be compared to another quote. One that gives a single price for a system size cannot. Dollar figures for each line item, every one attributed to a named Canadian source, are in the heat pump installation cost guide linked below.
Frequently asked questions
Is a heat pump cheaper to run than a gas furnace in Toronto?
- It depends on the gap between your electricity rate and the gas rate, and on how efficient the heat pump stays as it gets colder. A heat pump moves heat rather than making it, so it delivers more heat energy than the electrical energy it draws, but that ratio falls in cold weather while gas prices do not change with the temperature. Ask any contractor claiming a saving to show the assumed rates and the assumed efficiency, because the answer moves with both.
Will a heat pump keep a Toronto house warm in winter?
- A correctly sized cold climate model, with a plan for the coldest hours, will. The question to ask is what the balance point is for your house: the outdoor temperature below which the heat pump can no longer carry the full heat loss on its own. Below that point something else covers the gap, usually electric backup heat or an existing gas furnace. A quote that has not calculated your balance point has not answered this question.
Do I need to upgrade my electrical panel for a heat pump?
- Sometimes, and it is the item most likely to change the price. The installer should run an electrical load calculation for the house rather than guess from the panel's rating. The result decides whether the existing service is enough, whether a load management device can avoid an upgrade, or whether the service genuinely needs to be increased. Get that answer in writing before you compare quotes, because a quote that omits it is not comparable to one that includes it.
Can I keep my gas furnace and add a heat pump?
- Yes, and that is a dual fuel or hybrid system. The heat pump handles the milder majority of the heating season, then a control hands the house to the furnace below a set outdoor temperature. It avoids a large electrical upgrade in many homes and keeps full furnace output for the coldest nights. The tradeoff is that you maintain two heating systems, and the switchover setting quietly decides how much you save.
Questions to ask your contractor
- Can I see the heat loss calculation this size is based on?
- Which model and capacity are you quoting, and what is its output at our design temperature? What the equipment tier changes
- Did you do an electrical load calculation, and does the panel need upgrading? Where a panel upgrade lands
- What carries the house below the balance point: backup heat, the furnace, or nothing?
- Is commissioning included, with the measured airflow and refrigerant charge written down?