Ontario Boilers
Ontario combines cold winters, a vast housing stock, and strong utility rebate programs — making it Canada’s most active market for boiler replacement and high-efficiency upgrades.
8
Cities
6+
Installers
3
Rebate programs
Ontario at a glance
- Capital
- Toronto
- Avg heating cost
- $1,450/yr
- Energy
- Predominantly natural gas heating
Climate & sizing in Ontario
Cold continental winters (Zone 5–6), 3,400–4,500 heating degree days. Reliable high-efficiency heating is essential from November through March.
Predominantly natural gas heating, with a clean nuclear- and hydro-heavy electricity grid.
Size my boiler →Ontario rebates & incentives
Canada Greener Homes Loan
Up to $40,000 interest-freeAn interest-free loan of up to $40,000 over 10 years for eligible energy-efficiency retrofits, including qualifying high-efficiency boilers.
Home Efficiency Rebate Plus (HER+)
Up to $10,000+Rebates for qualifying high-efficiency boilers and other upgrades, requiring a home energy assessment.
Save on Energy Programs
VariesProvincial conservation incentives for energy-efficient equipment in homes and businesses.
Boiler installers by city
Local pricing and approved contractors in cities across Ontario.
Toronto
Zone 6 — Cold
Ottawa
Zone 6 — Cold
Mississauga
Zone 6 — Cold
Hamilton
Zone 6 — Cold
London
Zone 6 — Cold
Kitchener
Zone 6 — Cold
Windsor
Zone 5 — Cool
Markham
Zone 6 — Cold
Popular boiler brands in Ontario
Viessmann
Premium German manufacturer renowned for stainless-steel Inox-Radial heat exchangers and class-leading modulation.
Navien
Korean innovator that popularised high-efficiency combi boilers with built-in domestic hot water across North America.
IBC
BC-based manufacturer building high-modulation condensing boilers designed and tested for Canadian winters.
NTI
Canadian manufacturer (New Brunswick) producing the FTV and Trinity lines with stainless fire-tube heat exchangers.
Approved installers in Ontario
Maple Hydronics
Toronto, ONTARIO
Toronto’s premier boiler specialists with two decades of hydronic experience and factory-trained Viessmann technicians.
GTA Boiler Pros
Toronto, ONTARIO
Combi and condensing boiler specialists serving the Greater Toronto Area with transparent pricing.
Capital Comfort Heating
Ottawa, ONTARIO
Ottawa’s trusted hydronic heating team, specialising in high-efficiency boiler retrofits for cold-climate homes.
Steeltown Mechanical
Hamilton, ONTARIO
Hamilton-based boiler and radiant heating contractor known for honest assessments and clean installs.
Get Ontario Quotes
Compare up to 3 quotes from approved local installers — free, no obligation.