Heat pumps in Markham
Markham is one of the colder design points in the GTA, so sizing matters. We check the Ontario and federal rebates your home may qualify for and arrange the installation.
- Winter design temperature
- −21 °C
- Heating degree days
- 4,000
- Electricity distributor
- Alectra Utilities
What a Markham winter means for your heat pump
The building code uses −21 °C for Markham, with 4,000 degree days. That is three degrees colder than Toronto City Hall, so check a model’s heating capacity at −21 °C and not only its rating at milder temperatures.
Climate figures: Ontario Building Code, SB-1 (2024).
Heat pump alone, or with your furnace?
At −21 °C some Markham homes do well with a heat pump alone, and others keep a gas furnace for the coldest days. Our heat pump vs furnace guide compares them. Markham’s electricity distributor is Alectra Utilities.
Rebates for Markham homeowners
A qualifying home may get the federal rebate of $2,000, or up to $10,000 at or below the median income, for installs from November 1, 2026. The Ontario rebate needs pre-approval before work starts. Read the full rebate guide.
How we help
Tell us about your home and we estimate your rebate. We arrange the installation with our partner installer and help with the rebate paperwork.
Common questions
Should a Markham home keep its furnace?
It depends on the home’s heat loss and the model’s capacity at −21 °C. If the heat pump can cover the load, you may not need the furnace. A hybrid can make sense if it cannot, or if your furnace is still fairly new.
Are heat pump rebates different in Markham?
No. The Ontario and federal programs are not set city by city. What changes the amount is your home, your equipment and, for the federal rebate, your household income.
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