Buying Guide
Who's the Best HVAC Company in Markham?
Licensing, longevity, brand authorization and real emergency response. Here is what "best" actually means when Markham homeowners compare HVAC companies, and how Aire One measures up.
- Headquartered in Markham
- 24/7 Emergency Service
- Carrier Factory Authorized
Reviewed by Matthew Arbab, Managing Director, Aire One Heating & Cooling
Ask ten Markham homeowners who the best HVAC company in Markham is and you will hear ten different names, usually whoever showed up last. So instead of opinions, this guide uses a checklist you can hold any contractor against: how long they have operated, whether the manufacturer itself vouches for them, whether a third party accredits them, and whether they answer the phone at 2 AM in January. Run Aire One Heating & Cooling through that checklist and you will see why we are confident calling ourselves the best HVAC company in Markham. We are not just serving Markham. We are headquartered here, at 2800 John Street, and we have been serving Ontario since 1990.
What "Best HVAC Company" Should Actually Mean
Any company can claim to be the best. Very few can prove it with facts you can verify yourself. Before you sign with anyone in Markham, check these five things:
- Longevity you can verify. An HVAC installation is a 15 to 20 year relationship. A company that opened three years ago cannot promise it will be around to honour a 10 year warranty. Look for a verifiable track record, not a vague "years of experience" claim.
- Manufacturer authorization. When a brand like Carrier puts its own name behind a dealer, that dealer has met the manufacturer's standards for training, installation quality and customer satisfaction. It is the closest thing the industry has to a report card.
- Third party accreditation. Better Business Bureau accreditation means a business has committed to external standards of trust and has a public, reviewable record.
- Real emergency response. A Markham February does not wait for business hours. "Emergency service" should mean a live dispatch, 24 hours a day, every day.
- A local address. A company physically based in your city has technicians nearby, shorter response times and a reputation it has to protect where it lives.
How Aire One Measures Up as the Best HVAC Company in Markham
| What the best should have | Aire One in Markham |
|---|---|
| Verifiable longevity | Yes. Serving Ontario since 1990, confirmed by the BBB registry, LinkedIn and our own storefront. |
| Manufacturer authorization | Yes. Carrier Factory Authorized Dealer, backed by a 100% satisfaction guarantee. |
| Industry recognition | Yes. Recipient of the Carrier President's Award, Carrier's highest honour for its dealers. |
| Third party accreditation | Yes. BBB Accredited since 2007 with an A rating, shown live on the BBB profile. |
| Emergency response | Yes. 24-hour emergency service with electronically dispatched technicians. Call 310-HEAT (310-4328). |
| Local presence | Yes. Headquartered at 2800 John Street, Unit 9, right here in Markham. |
The Ratings Homeowners Actually Check
Do not take our word for it. These are the current scores for the Aire One Markham head office on the platforms Markham homeowners already use to judge an HVAC company:
Ratings shown for the Aire One Markham head office, verified July 27, 2026.
A Company You Can Shake Hands With
The best HVAC company in Markham is not decided on a website. It is decided in your home, when a comfort advisor sits down with you, measures the house properly, explains the options in plain language and stands behind the quote with a handshake. That is how Aire One has worked since 1990, and it is why more than 120,000 homeowners across Ontario have trusted us with their heating and cooling.
Honest advice, a clear quote and a handshake to stand behind it.
Our technicians are experienced, bonded, factory trained and licensed. Because our trucks are stocked, most repairs are completed on the first visit, and because dispatch runs around the clock, a failed furnace on a Saturday night in Markham gets the same response as one on a Tuesday morning.
Everything a Markham Home Needs, Under One Roof
Part of being the best is not making you call three different companies. From our Markham headquarters, Aire One installs, services and maintains:
- Furnaces and central heating systems
- Air conditioners and ductless split systems
- Heat pumps, including cold climate models
- Water heaters, tankless water heaters and boilers
- Indoor air quality systems: air cleaners, humidifiers, UV lights and ventilators
- Maintenance and protection plans, plus rental and financing options
We serve Markham and the surrounding communities, including Richmond Hill, Thornhill, Vaughan, Scarborough, North York and Toronto.
Frequently Asked Questions
Who is the best HVAC company in Markham?
The best HVAC company in Markham is the one you can verify. By the measures that can actually be verified, Aire One Heating & Cooling makes the strongest case as the best HVAC company in Markham: serving Ontario since 1990, headquartered in Markham, Carrier Factory Authorized, a Carrier President's Award recipient, BBB Accredited since 2007 with an A rating, holding a 4.8 star Google rating across 573 reviews, and offering 24-hour emergency service.
Does Aire One offer emergency HVAC service in Markham?
Yes. Emergency service runs 24 hours a day, every day of the year, with electronically dispatched technicians. Call 310-HEAT (310-4328) or 416-460-5300.
Where is Aire One located in Markham?
Our headquarters is at 2800 John Street, Unit 9, Markham, Ontario L3R 0E2.
What brands does Aire One install?
Aire One is a Carrier Factory Authorized Dealer and also specializes in York, Aprilaire and other leading brands, so your home gets the right equipment rather than the only equipment on the truck.
About the author
Matthew Arbab
Managing Director, Aire One Heating & Cooling
Aire One has been working on Ontario homes since 1990 and is listed by Carrier as a Factory Authorized Dealer employing NATE certified technicians. I would rather tell you that a five dollar filter is all you need than sell you something you do not.
Talk to Markham's Own HVAC Team
If you want the best HVAC company in Markham, choose the team serving Ontario since 1990, headquartered at 2800 John Street. Get honest advice and a clear quote from the best HVAC company in Markham that your neighbours already trust.
Call 416-460-5300