There’s a persistent myth that heat pumps don’t work in Canada’s climate. Modern cold-climate models are designed for exactly this, and plenty of homes in cold regions run on them. Still, they have to be chosen, sized and installed with care, so here are the points that matter most before you buy.
What “cold-climate” means
A cold-climate air-source heat pump keeps delivering useful heat at low outdoor temperatures. Different programs and standards define this differently. Some rebate programs require a minimum efficiency at -15°C, and ENERGY STAR and regional lists identify cold-climate models. Before you pick a model, find out which list your province or utility uses, because a heat pump that isn’t on it may not qualify for a rebate.
What it costs
Prices vary a great deal by province, house size, ductwork and electrical work. As a planning range for 2026, a cold-climate ducted heat pump often costs about $8,000 to $18,000 installed before rebates. Simpler ductless systems usually cost less, and geothermal systems cost far more. Provincial and utility rebates can lower the net cost, and our guide to provincial rebates shows where to look.
Sizing matters more than people think
Ask for a proper heat loss calculation for your home, not a rule of thumb based on square footage. Check what the unit can deliver at your coldest design temperature, not just on a mild day. Oversizing wastes money and can make the house less comfortable, while undersizing means the backup heat runs more often than you want. A contractor who explains these trade-offs is usually a good sign.
Backup heat
Many homes keep an existing furnace or electric heat as backup for the coldest days. In a dual-fuel setup, the system switches between the heat pump and the furnace depending on the outdoor temperature. Ask the contractor how the controls decide which one runs, and what each mode will cost to operate. Some people replace their furnace completely, particularly when they’re moving away from oil or electric baseboards.
Will it be cheaper to run?
That depends on your current fuel and local prices. A heat pump often saves the most when it replaces oil, propane or electric baseboard heating. Compared with cheap natural gas, the savings can be small. Take your actual bills and the price of electricity in your province, and compare. It’s ordinary payback arithmetic: the net cost divided by the yearly saving, using Canadian prices.
Get the house ready
Air sealing and insulation reduce the size of system you need, so do the cheap jobs first. Check your electrical panel, since you may need extra capacity or a new circuit. Leaky or undersized ducts reduce performance, so have them looked at. And plan where the outdoor unit will sit: it needs clearance and protection from heavy snow and ice. Our insulation guide covers the shell upgrades.
Questions to ask installers
- Is this model on the cold-climate list for my rebate program?
- What is its output at -15°C and at my coldest design temperature?
- What backup heat will I use, and when does it turn on?
- What warranty, servicing and defrost arrangements are included?
How it behaves in deep winter
A few things surprise first-time owners. The outdoor unit goes into a defrost cycle from time to time, which can produce a puff of steam and a short pause in heating. Snow and ice shouldn’t be allowed to build up around it, so a raised stand and a little clearing help. On the very coldest days, backup heat may switch on, which is normal as long as it’s not running all the time. Cleaning or replacing filters and an annual check keep the system running efficiently.
Plan before something breaks
If your furnace dies in January, you’ll make a quick decision under pressure, and some rebate programs need approval before the work starts. If your system is old, it’s worth planning the replacement ahead of time. Installers are also usually less busy in spring and fall than during the first cold snap, which can help with both scheduling and pricing.
Two common questions
Will I still need my furnace? Sometimes, especially in the coldest regions. Others replace it completely.
Does it also cool my home? Yes. Air-source heat pumps provide air conditioning too, which can save you from buying a separate unit.
Use our Canada calculator to compare costs and rebates once you have a quote.