Gas Furnace WETT Inspection in Thornhill Markham
Older 80% AFUE gas furnaces vent into a chimney (often shared with a hot-water tank) and the low-temperature exhaust condenses inside the flue — accelerating masonry decay. Modern 95%+ AFUE furnaces sidewall vent and orphan the chimney. In Thornhill Markham, Markham, our WETT inspection visit takes 45–90 minutes and includes a written photo report.
What's included for Thornhill Markham, Markham homeowners
- Gas Furnace-specific WETT inspection protocol
- Full HEPA containment — cleaner than we found it
- Written photo report emailed same day
- Insurance-ready documentation on request
- Fixed price — $299 starting, quoted in writing first
- Same-week booking across every Markham postal code
Why Thornhill Markham homeowners call us first
Gas Furnace WETT Inspection in Thornhill Markham — FAQ
How much does gas furnace WETT inspection cost in Thornhill Markham?+
In Thornhill Markham, gas furnace WETT inspection starts at $299. Complex gas furnaces, tight venting access, or additional flues raise the total — always quoted in writing before we begin.
How often should I service my gas furnace in Thornhill Markham?+
Gas Furnaces in Thornhill Markham should be professionally serviced every 12 months for insurance compliance and safe operation. Average appliance service life is 20 years with annual maintenance.
What warning signs mean I need this service now?+
Watch for: white powder efflorescence on exterior brick; water dripping from the flue collar; cold-start co spikes; furnace + water heater sharing a large flue. Any one of these signs in Thornhill Markham means schedule WETT inspection within 30 days.
Do you handle gas furnaces in Thornhill Markham specifically?+
Yes — our WETT-certified crew has serviced 12,000+ chimneys across the GTA including hundreds of gas furnace installations in Thornhill Markham and surrounding areas.
Do you offer a warranty?+
Every gas furnace WETT inspection visit in Thornhill Markham carries a 5-year workmanship warranty on repairs and a satisfaction guarantee on cleanings.
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- Fixed-price written quote
- No spam, no sales calls
- WETT & CSIA certified