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Gas Appliance Safety: Why You Need a TSSA-Licensed Technician

Understand Ontario gas safety regulations and why all gas appliance work requires TSSA-licensed professionals.

Gas Safety Tips Every Homeowner Should Know

Roger Wakefield · 500K+ views

This Work Requires a Licensed Professional

HVAC Pros work is regulated by TSSA in Ontario. Doing unpermitted work can void your insurance and create safety hazards. The guide below explains what you need to know before hiring.

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What This Video Covers

Why gas appliance work is strictly regulated for safety
How to detect a gas leak and what to do immediately
Carbon monoxide dangers from improperly installed appliances
What TSSA licensing means and why it matters

Safety Warnings

NEVER attempt any gas appliance work yourself. Gas leaks cause explosions and carbon monoxide poisoning is fatal. Ontario law requires TSSA-licensed technicians.
If you smell gas, evacuate immediately. Do not use light switches, phones, or any electrical devices inside the home. Call your gas utility from outside.
Install carbon monoxide detectors on every level of your home and outside sleeping areas. Test monthly and replace batteries annually.
Have all gas appliances professionally inspected annually. A cracked heat exchanger can leak carbon monoxide into your home with no visible signs.

What You Need to Know

Understand Ontario gas safety law

The Technical Standards and Safety Authority (TSSA) regulates all gas work in Ontario. Only TSSA-licensed technicians (G1, G2, or G3 certified) can legally install, repair, or service gas appliances. This includes furnaces, water heaters, stoves, fireplaces, and BBQ gas lines.

Know the dangers of gas work

Natural gas is explosive. A gas leak can cause an explosion that destroys an entire home. Carbon monoxide from improperly installed gas appliances is an invisible, odourless killer. Over 50 Canadians die from CO poisoning annually.

What homeowners CANNOT do with gas

You cannot legally install, modify, repair, or disconnect any gas appliance or gas line in Ontario. You cannot convert appliances between natural gas and propane. You cannot install a gas BBQ line, gas fireplace, or gas dryer hookup.

What homeowners CAN do

You may light a pilot light following manufacturer instructions. You may clean the exterior of gas appliances. You may shut off the gas valve at the appliance in an emergency. You may and should test your carbon monoxide detectors monthly.

How to find a TSSA-licensed technician

Search ProScore for HVAC contractors with verified TSSA licensing. ProScore verifies TSSA registration across up to 15+ data sources. Always ask to see a technician's TSSA license card before allowing them to work.

What to do if you smell gas

If you smell gas (rotten egg odour): do NOT turn on lights or use any electrical switches. Leave the home immediately. Call Enbridge Gas (1-866-763-5427) or your local gas utility from outside. Do not re-enter until cleared by a professional.