How to Hire a HVAC Contractor in London
Your complete 2026 checklist for hiring a hvac contractor in London, Southwestern Ontario. What to verify, what to ask, and what to avoid.
Hiring Checklist for London
Before hiring a hvac contractor in London, verify every item on this list. These steps protect your investment and ensure you are working with a qualified professional.
Verify TSSA registration for any gas appliance work
Confirm G2 or G1 gas fitter certification for gas-related jobs
Check WSIB coverage and liability insurance
Get quotes from at least 2–3 contractors for major installations
Ask about equipment warranties and labour guarantees
Verify they will obtain required permits and arrange inspections
Red Flags to Watch For
If a hvac contractor in London displays any of these warning signs, consider looking elsewhere. Protecting yourself starts with recognizing these patterns.
Not TSSA-registered but offering to work on gas appliances
Pushes a specific brand aggressively (may be getting kickbacks)
Cannot explain equipment efficiency ratings (AFUE, SEER)
Offers extremely low quotes without seeing your existing system
No written warranty on parts or labour
Wants to install without pulling permits
Questions to Ask Before Hiring
Are you TSSA registered?
Good answer: Yes, my TSSA registration is current. I can provide my number for verification.
What efficiency rating do you recommend?
Good answer: Based on your home size and usage, I'd recommend [specific AFUE/SEER] because [reason].
What warranties are included?
Good answer: The equipment has a [X]-year manufacturer warranty and I offer [X]-year labour warranty.
Will you handle permits and inspections?
Good answer: Yes, I take care of the gas permit and arrange the TSSA inspection.
Licensing Requirements in London
HVAC contractors working with gas-fired appliances in Ontario must be registered with TSSA. This is a legal requirement, not optional. TSSA registration ensures the technician is trained to work safely with gas systems. Verify credentials at TSSA (Technical Standards and Safety Authority).
Frequently Asked Questions
How do I find a good hvac contractor in London?
Start by comparing hvac contractors on FinderHub, which aggregates ratings from Google, HomeStars, BBB, and TrustedPros. Look for providers with Trust Index scores above 70 and verified government licences.
What licences should a hvac contractor in London have?
HVAC contractors working with gas-fired appliances in Ontario must be registered with TSSA. This is a legal requirement, not optional. TSSA registration ensures the technician is trained to work safely with gas systems.
How many hvac contractors are in London?
FinderHub tracks 0 verified hvac contractors in London.
Should I get multiple quotes from London hvac contractors?
Yes. Always get 2–3 written quotes for any job over $500. Compare not just price, but credentials, insurance coverage, and reviews across multiple platforms.
Related Guides
Compare HVAC Contractors in London
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