Is an HVAC contractor licensed in Ontario, and how do you check?
Yes, at two levels. Under Ontario law, furnaces and other fuel-fired appliances must be maintained by TSSA-registered contractors, and every registered contractor must employ TSSA-certified gas technicians; a G.2 certificate under O. Reg. 215/01 covers gas or propane appliances of 400,000 Btu/h or less. Air conditioner work with refrigerant needs an Ozone Depletion Prevention card plus a Certificate of Qualification in a trade such as refrigeration and air conditioning mechanic.[1],[2],[3]
How to check
Look the company up in TSSA's public registry of authorized fuels contractors. Registered fuels contractors are the only businesses legally authorized to do fuels-related work in Ontario. The registry is updated at the beginning of each month, and a listing is not an endorsement or referral by TSSA.[4]
What Ontario's rules say
- Furnaces and other fuel-fired appliances must be maintained by TSSA-registered contractors, and every registered contractor must employ TSSA-certified gas technicians. TSSA[1]
- TSSA's public registry of fuels contractors lets you check that a heating company holds a valid TSSA registration; it is updated at the beginning of each month. TSSA[4]
- Under O. Reg. 215/01, only a certified gas technician may install, service or repair a natural gas or propane appliance such as a furnace; a G.2 certificate covers appliances of 400,000 Btu/h or less. Government of Ontario[2]
- Servicing an air conditioner or heat pump that holds refrigerant requires certification, and an Ozone Depletion Prevention card alone is not enough: the technician also needs a Certificate of Qualification in a trade such as refrigeration and air conditioning mechanic. Government of Ontario[3]
Frequently asked questions
Does an HVAC company need a licence in Ontario?
For fuels work, yes. Furnaces and fuel-fired appliances must be maintained by TSSA-registered contractors, and registered contractors must hire TSSA-certified gas technicians. TSSA calls registered fuels contractors the only businesses legally authorized to do fuels-related work in Ontario.[1],[4]
How do I check an HVAC company's TSSA registration?
Search TSSA's registry of authorized heating fuel contractors to find or verify a company with a valid TSSA registration. It is updated at the beginning of each month.[4]
What certificate does a gas technician need?
O. Reg. 215/01 says no one may work as a certificate holder without a certificate from the director, such as a G.1 or a G.2. A G.2 holder may install, inspect, alter, repair, service or remove a natural gas or propane appliance with an input of 400,000 Btu/h or less.[2]
Who can work on my air conditioner?
Handling refrigerant takes an Ozone Depletion Prevention card, valid for 5 years, but the card alone is not enough to work on or fix refrigeration equipment: the technician also needs a Certificate of Qualification in a trade such as refrigeration and air conditioning mechanic.[3]
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Sources
- TSSA, Be Fuels Wise: hire registered and certified professionals (News release, March 1, 2024). Accessed October 19, 2026.
- Government of Ontario, O. Reg. 215/01: Fuel Industry Certificates. Accessed October 19, 2026.
- Government of Ontario, Certificate to handle refrigerants. Accessed October 19, 2026.
- TSSA, Authorized heating fuel contractors. Accessed October 19, 2026.
This guide restates what each source says; it is not legal advice. Rules change — the linked source is the authority.
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