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Heating & Cooling in London and the Greater Surrounding Area

Air Quality Experts Serving the London, St. Thomas, & Mount Brydges Areas

What Sets Us Apart

  • We’re Here When You Need Us – When you need us most, we are available to help. You can call us 24 hours a day, 7 days a week, 365 days a year, even on evenings, weekends, or holidays! After-hours calls are still guaranteed a response within 60 minutes.
  • Comfort Guaranteed – When we get stuff done, we get it done right – guaranteed. That’s why we have a Just RightTM guarantee, so you know when you call on M&K, we won’t quit until you’re satisfied.
  • 3 Decades of Experience – We’ve been doing what we do for over 35 years, so you know we have a wealth of knowledge we can pull from for all kinds of situations. No matter what the problem, we have it well in hand.
  • Service You Can Rely On – WOur ratings speak for themselves. Continuous 5-star Google reviews mean that we provide service you can rely on. Don’t hesitate to call us today with any questions or concerns!

Heating & Cooling in London and the Greater Surrounding Area

Our Guarantees

We have the utmost confidence in our work and our people and want to make sure you do, too. That’s why we offer a 2-year guarantee to repair, replace, or refund. Whatever you need until you’re 100% satisfied.

Why Choose Us?


No Loopholes™

Up to 2 years after the installation date we ensure 100% satisfaction or your money back. No Loopholes™, no problems.


No Hassles™

If your new furnace breaks down within the first 2 years of installment, we’ll fix it for free within 24 hours or give you $1000 for your troubles. No Hassle™, no headache.


Just Right™

We guarantee that any furnace we install will keep you comfortable. If your system isn’t providing a consistent temperature anywhere within 5 years of the installation date, we’ll fix it up to and including replacing the entire system, totally free. No fluctuations, Just Right™.


We Respect You™

We pride ourselves on always acting with integrity and promise to treat your home with the utmost care and respect. If we don’t meet your expectations in any way, you’ll receive our Five Year System Check-Up Package™ totally free of charge. We Respect You™ and your home.

What Homeowners Say About M&K Heating’s HVAC Services

“We needed to get a central humidifier for our home and did not hesitate to contact M&K H&A. As a long-standing customer we’ve always had a great experience and this was no exception. From the appointment booking to installation by Bradley, who was friendly, courteous and spot on with his work, it’s why we continue to trust in M&K. Thank you again for a great job!”​

“Just had M&K Heating and A/C come and do maintenance on our system. Ray was professional and courteous and very mindful of the precautions he needed to take to get his job done while maintaining physical distance during this difficult time. Thank you Ray and stay healthy and safe.”​

“The lead technician Runualdo and his helper Robert, did excellent work. They worked very efficiently. The work was done very skillfully. They explained everything. They cleaned the work area well after they finished the work. Thank you for the good job Runualdo and Robert.”​

Heating & Cooling in London and the Greater Surrounding Area

Guaranteed Comfort

We aren’t satisfied until you’re satisfied, guaranteed.

Always Ready

We are always available, 24/7 365 for any HVAC emergency you might have.

Trusted Experience

We have been operating since 1983, which means we have over 35 years of expertise to offer.

Technological Expertise

All of our technicians are Right TimeTM certified and continuously trained to maintain excellence.

Community Focused

We operate in the London area and have been for over 3 decades, which means we’ve gotten to know our neighbours.

Exceptional Reviews

We maintain a 5-star rating on Google for a reason; we care about our work.

Book a Home HVAC Service With the Pros at M&K