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Your Local Experts

M&K has been providing heating and cooling services for London and the surrounding communities since 1983.

What Sets Us Apart

We have been serving our communities in London and the surrounding area for over 35 years. That means we’ve had time to get to know our neighbours and climate, so you can feel confident knowing we have the experience to get the job done right the first time.

Our technicians go through extensive background checks and continuous training and mentorship to become and remain Right TimeTM certified. Our experts also hold a variety of certifications, such as G1, G2, 313A & 313D, 308A, ODP, Wardflex, and Supervisor Training Program & IHSA Health and Safety Education Program for Contractor Safety Essentials so that they have the tools needed to serve you better.

We hold ourselves to a high standard, backed by our Just RightTM guarantee. We promise that anything we do, from repairs to general maintenance, aren’t done until they’re done Just RightTM. Additionally, we want you to know that We Respect YouTM , so we will always be kind and courteous and leave your home exactly how it was when we arrived.

We are available 24 hours a day, 7 days a week, 365 days a year. You can call us for any of your urgent or emergency needs at any hour, even on evenings, weekends, or holidays. You can expect to have a response from us within 60 minutes, guaranteed!

Created Comfort
In Over


Heating & Cooling in London, St. Thomas, Mount Brydges, & Surrounding Area

M&K has been providing London and the surrounding areas with dependable heating and cooling services since 1983.

Now, as a part of the Right TimeTM Heating & Air Conditioning family, we can combine our impeccable expertise with more services, locations, and support. We’re here to help you find the best solutions for your home and lifestyle, no matter what your needs.

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 LoopholesTM

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


No HasslesTM

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 HassleTM, no headache.


Just RightTM

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 RightTM.


We Respect YouTM

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 PackageTM totally free of charge. We Respect YouTM and your home.

A Message from Our GM, Becky Carnegie

Growing up in London, Ontario, Becky appreciates and understands the unique needs of her customers in the London market. With over 12 years of service in the HVAC industry, Becky holds M&K’s work to a high standard, ensuring that she and her team deliver 100% satisfaction and customer expectations are not just met but exceeded.
Outside of work, you can find Becky hanging out with her children at the hockey arena or tending to the horses at the local stables.

You can reach Becky anytime at [email protected].

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(519) 673-4449


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Guaranteed Comfort

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

Trusted Experience

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

Community Focused

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

Always Ready

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

Technological Expertise

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

Exceptional Reviews

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

24/7 365 SERVICE

(519) 673-4449 Request a Quote
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