Gas is regulated more tightly than almost anything else in a house because a small mistake is not a leak you can mop up: it is carbon monoxide in a bedroom or an explosion. Ontario's rules sit in the Technical Standards and Safety Act, 2000, with O. Reg. 212/01 for gaseous fuels and O. Reg. 215/01 for the technicians' certificates.
What gas work needs a licensed technician in Ontario?
Installing, altering, purging, activating, repairing, servicing or removing a gas appliance or its piping. O. Reg. 212/01 says no one may do that without the right certificate, and that contractors doing it for customers must be registered with TSSA. TSSA's consumer guidance puts it simply: only TSSA-registered fuels contractors can legally do fuels-related work, and they must use certified gas technicians.
| Job | Who | Licence needed | Why |
|---|---|---|---|
| Run a new gas line to a BBQ or install a quick-connect | Registered fuels contractor | TSSA G2 or G1 technician | New gas piping |
| Plug a BBQ hose into an existing quick-connect outlet | You | None | Designed for the user to connect; follow the manual |
| Service or clean a gas fireplace | Registered fuels contractor | TSSA G2 or G1 | Servicing a gas appliance |
| Hook up a gas stove or dryer | Registered fuels contractor | TSSA G2 or G1 | Connecting an appliance to gas piping |
| Furnace repair or annual maintenance | Registered fuels contractor | TSSA G2 or G1 | Gas appliance repair and servicing |
| Relight a pilot following the label instructions | You | None | The regulation allows owners to relight their own appliance |
| Smell of gas | Enbridge Gas or 911, from outside | Not a repair call | Emergency, not a booking |
Do I need a licensed gas fitter to hook up a natural gas BBQ?
For the line, yes; for the hose, no. Running pipe from the house to the patio and installing the quick-connect outlet is gas piping work for a registered contractor with a certified technician, who tests the line for leaks before it is used. Once that outlet exists, clicking a natural gas BBQ's hose into it is the connection the product is designed for you to make. Never convert a propane BBQ to natural gas yourself; conversion kits are appliance work.
Can a homeowner do their own gas work in Ontario?
Only in narrow cases, and not as a shortcut. O. Reg. 215/01 exempts an owner who installs or services an appliance in a detached house they own and live in, but the owner may not turn a newly installed appliance on until a certificate holder confirms it complies. It also lets you relight your own appliance and connect portable ones. You still cannot hire an unregistered handyman or a friend to do gas work, and TSSA's own public guidance does not promote the exemption. If you are unsure whether a job fits, ask TSSA before you start.
What do G1, G2 and G3 mean?
They are TSSA gas technician certificate levels. A G2 technician can work independently on appliances up to 400,000 BTU per hour, which covers every appliance in a normal house. A G1 can work on any size. A G3 is an entry-level certificate and may only work alongside a G2 or G1 holder, so if a G3 arrives alone to install your fireplace, ask who is certifying the work.
How do I check a gas contractor is registered?
Use TSSA's fuels contractor lookup, which searches by company name, registration number or location. Registered contractors must mark their field vehicles with their name and TSSA registration number. TSSA has no public lookup for individual technicians, so ask to see the technician's certificate card. Be wary of calls offering a free inspection of your furnace or fireplace on behalf of the gas utility; since March 1, 2018, Ontario bans signing furnace and similar contracts at your door unless you invited the business.
Doyo's heating jobs go only to technicians whose certificate Doyo has checked; furnace or AC maintenance is $206.50 all-in, shown before you book.
Questions people ask
Sources
- TSSA — Consumer safety · tssa.org
- TSSA — Find a registered fuels contractor · tssa.org
- Ontario e-Laws — O. Reg. 212/01, Gaseous Fuels · ontario.ca
- Ontario e-Laws — O. Reg. 215/01, Fuel Industry Certificates · ontario.ca
- Enbridge Gas — If you smell gas · enbridgegas.com
- Ontario — Rules for businesses entering contracts in a consumer's home · ontario.ca