Cold climate heat pumps work down to -30'C. That's cold enough for most of North America, but backup heating can be a good investment for peace of mind. Foundry Heat Pumps has a free assessment to help you find the right heat pump for your house.
My house is old and leaky, does that matter?
Yes and no. Leaky homes require more heating, which can cause comfort issues. A performance-based heat load calculation is required to find the right system for your house.
How much does it cost to operate?
Heat pumps and furnaces cost about the same to operate in Ontario.