Technical Standards and Safety Authority
Ontario's regulator for fuels, boilers and pressure vessels. Gas and fuel work in Ontario must be done by TSSA-registered contractors and certified technicians.
Verify on the official register →
Based on public register entries and source listings collected up to Jul 11, 2026. Not an official membership count.
Check a specific contractor
Thinking of hiring someone? Confirm their current TSSA status on the official register, then run their name through our Cowboy Checker to see their reviews, credentials and company details in one place.
Where TSSA holders are
- ON
- Ontario
- QC
- AB
Trades that hold it
HVAC Contractor · 759Heating Engineer · 3Builder · 1HVAC Contractor · 1Plumber · 1
TSSA holders with review evidence
These businesses hold a current TSSA entry and have customer reviews we can show. This is a small slice of all holders, not the register itself.
- Spring Home Heating & Cooling Systems Inc
- Cedarstone Group Inc.
- AtlasCare Heating, Cooling, Plumbing
- Homestar Heating & Air Conditioning Inc
- JC Contracting & Mechanical Inc
- Airthentic Heating And Cooling Inc
- Aria Heating and Cooling Inc.
- Peak Comfort HVAC Inc.
- A Grade Heating and Air Conditioning Inc.
- Finest Plumbing and Mechanical Inc.
Common questions
What is Technical Standards and Safety Authority?
Ontario's regulator for fuels, boilers and pressure vessels. Gas and fuel work in Ontario must be done by TSSA-registered contractors and certified technicians. (Licence required by law.)
How many contractors hold Technical Standards and Safety Authority?
We track 769 contractors with a Technical Standards and Safety Authority entry, based on register and listing data collected up to Jul 11, 2026. This reflects the public entries we have collected, not necessarily the scheme's complete membership.
Can a Technical Standards and Safety Authority entry be out of date?
Yes. 57 of the entries we track appear expired or past their stated expiry date, based on register and listing data collected up to Jul 11, 2026. Always confirm current status on the official register before hiring.
How do I check whether a specific contractor holds Technical Standards and Safety Authority?
Check the official register at https://www.tssa.org/, or look the contractor up on MyTrustedTraders. Profiles show the credentials we have found for them, alongside reviews and other public evidence.
Keep checking
We show what the public sources say, with dates. A listing here is not an endorsement, and absence from our data does not mean a contractor is unregistered. Always confirm current status with the scheme before you hire.