Do heat pumps actually work in a Canadian winter? A short overview for Ontario building owners.
As Ontario heads into another heating season, heat pumps are coming up more often in conversations with building owners and property managers. The interest is real, and so is the skepticism. The question we hear most is a simple one: do they actually work when it gets cold?
The Short Answer
Yes, with the right design. A heat pump moves heat rather than burning fuel to create it, drawing warmth from outdoor air and delivering it inside. Early models lost a lot of performance as temperatures dropped, and that is where the reputation comes from.
Modern cold-climate heat pumps were built to solve exactly that problem, and many are rated to operate well below -20°C. For most Ontario buildings, that covers the vast majority of the heating season.
What to Consider
Whether a heat pump is a good fit comes down to a few practical questions:
Distribution system. Heat pumps typically deliver heat at lower temperatures than gas boilers, so existing radiators, coils, or ductwork may need a second look.
Electrical capacity. Switching from gas to electric adds load, so it is worth confirming your building’s service can support it.
Building envelope. A well-sealed, well-insulated building needs less heat, which makes any system smaller, simpler, and more effective.
Operating costs. Results depend on your current system, your building, and local energy rates.
Design Makes the Difference
Not every building is an ideal candidate today, and that is worth saying. But a building that is not ready now may be after an envelope upgrade or a distribution system replacement. That is why we recommend looking at heat pumps as part of a broader study or energy audit rather than on their own.
The right answer comes from engineering analysis of your specific building, not a blanket rule in either direction. If you have an aging gas-fired system heading into this heating season, now is a good time to understand what the alternative would look like. We would be glad to talk it through.
Considering a heat pump for your building? Get in touch with our team to discuss whether it could be a fit for your building.