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Getting in

How to become a gas fitter in Ontario

Gas is the fastest-entry regulated trade in construction: instead of a multi-year apprenticeship, you complete an accredited gas technician program, pass TSSA exams, and climb G3 → G2 → G1 as you gain field experience.

Fuel Systems & Gas Fitting at a glance

Licence to do the work
Required — TSSA gas technician certificate (G3 → G2 → G1)
Path in
College gas technician program + TSSA exams — months, not years, to G3
Regulated by
TSSA
Insurance baseline
Strong CGL — confirm gas work is not excluded

The path, step by step

  1. 1

    Take an accredited gas technician program

    Colleges and private training providers run TSSA-accredited Gas Technician 3 and Gas Technician 2 programs — G3 programs run weeks-to-months, not years.

    Gas technician certification — TSSA
  2. 2

    Certify at G3 and get hired

    G3 lets you work on smaller residential appliances under a G2/G1 holder. It is the standard entry job with HVAC and plumbing contractors.

  3. 3

    Climb to G2

    With field experience and the G2 program/exam, you can work independently on most residential and light-commercial gas equipment — the level most self-employed gas fitters operate at.

  4. 4

    Register as a gas contractor when you go independent

    To contract gas work as a business, the company itself registers with the TSSA as a fuels contractor — separate from your personal certificate.

    Full guide: Trade Licensing

The real picture

Gas is the fastest-entry regulated trade in construction — months to a G3, not the five-year apprenticeship of the compulsory trades — and the questions are about climbing and combining: G3 vs G2 vs G1, how fast you can actually earn, whether to pair it with HVAC or plumbing, and the on-call reality of no-heat calls at midnight in January.

What you'll actually make

From day one to the top of the trade. Ontario figures, approximate and worth verifying against current rates.

  1. G3 (entry)

    $22–30/hr

    Limited residential input; must work under a G2/G1.

  2. G2

    $30–42/hr

    Most residential and light-commercial gas work — where most self-employed gas techs operate.

  3. G1

    Higher

    Unlimited input — large commercial and industrial.

  4. Gas/HVAC contractor

    Business income

    TSSA-registered, usually paired with HVAC or plumbing.

Which lane is right for you

G3 → G2 → G1

Gas is a ladder you climb by input capacity and experience.

G3

A weeks-to-months accredited program. Limited residential appliances, working under a G2 or G1. The foot in the door.

Best for: Anyone wanting the fastest way into a regulated trade.

G2

Most residential and light-commercial gas appliances — furnaces, boilers, water heaters. The level most independent gas work happens at.

Best for: People ready to work independently.

G1

Unlimited input — large commercial and industrial equipment.

Best for: People targeting commercial/industrial gas.

Pair it with what

With HVAC

Gas plus 313A/313D makes you a full heating tech — furnaces and boilers are gas, so this is the natural combo and where most residential HVAC money lives.

Best for: People who want the full heating-and-cooling career.

With plumbing

Gas plus 306A covers water heaters, boilers, and gas lines — a strong residential service combination.

Best for: Plumbers broadening into mechanical/heating.

Getting in

Through an accredited gas technician program and TSSA exams — the fastest regulated entry in construction. You can hold a G3 in months and be working under a G2/G1, then climb as you gain field experience. Gas is regulated by the TSSA, not Skilled Trades Ontario, so it sits outside the apprenticeship-and-C-of-Q system.

Where it leads (and the way out)

Up to G1 and commercial/industrial gas, into owning a gas/HVAC contracting business, or off the tools into TSSA inspection, instruction, or sales. Realistically, most gas fitters broaden rather than stay gas-only — into full HVAC or plumbing — because gas alone is a narrow scope. The ticket is a powerful add-on more than a standalone career.

Where the real conversations are

The communities, official bodies, and wage data tradespeople actually use.

Go to the source

The official pages that govern this trade. Bookmark these, they are the final word on requirements and fees.

Thinking bigger? Start a gas fitting business

The step-by-step from qualified tradesperson to business owner.

Fuel Systems & Gas Fitting questions, answered

Licences, costs, timelines. Answered straight.