Furnaces, air conditioners, heat pumps, boilers, water heaters and ductwork. Gas work requires TSSA certification.
Quote only
Furnace or air conditioner supplied and installed. Heat pumps and boilers cost more. Excludes ductwork modification and electrical upgrades.
Demand and price peak in summer. Booking outside it is the cheapest saving available on this job.
Required by law. Ontario law requires this credential for the work. A contractor without it cannot legally do the job, whatever the quote says. Technical Standards and Safety Act, 2000, O. Reg. 215/01 (Fuel Industry Certificates).
This work usually needs a municipal permit. Unpermitted work has to be disclosed when you sell, and an insurer can decline a claim arising from it.
You asked for the trade Heating and cooling, and the words "air conditioner replacement", and businesses serving East York. Of the 12 businesses listed, none match every one of those.
The cost band and the licence requirements above still apply. They are what you need to judge a quote from anywhere else: whether the price is in the range, and whether the person quoting is allowed to do the work at all.
Listings here are seed data for demonstration and are labelled as such on each profile. Cost bands are what GTA homeowners are typically quoted, not offers. Always confirm a licence number against the issuing registry yourself before work starts.