We Replace, Repair, and Maintain Boilers

Our team of experts can keep your boiler running efficiently and reliably.

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Boiler Services in St. Catharines & the Niagara Region

What Sets Us Apart

Mr. Furnace has been installing, repairing, and maintaining boilers for families in the Niagara region and St. Catharines since 1978. From day one we have maintained an unwavering commitment to top quality customer service, quality parts and products, and world-class craftsmanship.

All of our service and installation technicians have the required certifications for the job, and receive ongoing training so that they are prepared for any problems they encounter. This ensures that every installation is done correctly and conforms to our high standards. All of our employees are required to pass a background check and be bondable.

Mr. Furnace has been the go-to choice for boiler installation, repair, and maintenance in St. Catharines and the Niagara region since we first opened in 1978.

We take both our craftsmanship and our customer service seriously, which means we aren’t satisfied until you are satisfied. Our entire team works hard to ensure that every interaction you have with us leaves you satisfied.

What Customers Say

“We’ve been happy customers of Mr. Furnace for years, for annual service and maintenance. This evening our boiler stopped working so we placed a service call. Real people answer the phones at Mr Furnace (no automated system). The gentleman I spoke to was very friendly and helpful. He told me a service person could come tonight, and provided an accurate time estimate. They called back to tell me when the technician was on his way. The technician Mark arrived and was extremely professional and kind. He fixed the boiler and got our heat back on, which was so greatly appreciated on this cold night. Despite the fact that it was late, he provided fantastic service with a smile. Thank you again Mr. Furnace!

We had Mr. Furnace back last week to do our annual preventive maintenance. As usual, the service was professional and courteous, from the office staff who called to book the appointment and notify us when the technician was on route, to the technician himself. The technician was Mark again, and he completed the servicing efficiently and with courtesy. We are so happy with the service from Mr. Furnace!”

- J. H.

“I am very pleased with my service. This is the second year in a row that I have had Claude and he does an amazing job. Very informative, efficient and friendly! I have no worries when Claude comes to service our boiler.”

- Kyle B.

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We’re The Experts On Furnaces and More

Mr. Furnace Heating & Air Conditioning is the preferred choice for home comfort in the St. Catharines and Niagara region. In fact, we have been for over 40 years. And now, as part of the Right Time™ Heating and Air Conditioning group, we are able to serve you even better.

With a larger network of experienced professionals, exceptional training and certification, as well as the added value of standard guarantees, you can trust Mr. Furnace for all of your HVAC needs.

Frequently Asked Questions

All types of boilers should undergo annual maintenance. A maintenance appointment once a year is an opportunity to have your boiler looked at by a professional. During your maintenance appointment, one of our expert boiler technicians will take the time to make any necessary adjustments and catch minor repairs before they turn into bigger issues.

Boiler installation usually takes at least one full day. How long your boiler installation will take depends on a variety of factors, so in certain cases installation can take up to two days. One of our technicians can provide you with a detailed time estimate based on your home’s needs after your free in-home assessment.

Both boilers and furnaces heat your home, but they do it using different methods. Boilers keep your home warm using radiant heating, which comes from hot water that is distributed to radiators throughout your home. Furnaces use forced air that is sent around your home via ducts and vents.

How often you need to replace your boiler depends on a few different factors, but you can expect to need a new boiler every 8 to 15 years. When exactly it’s time for a new boiler can depend on your boiler’s model, fuel type, and the maintenance of your boiler. If you’re unsure if it’s time for you to replace your boiler, call us for a free in-home assessment.

Our Guarantees

Whether we are installing an air conditioner or repairing your furnace, the team at Mr. Furnace stands behind our work. We aren’t satisfied until you are satisfied, and we will do everything we can to ensure that your experience with us is a great one.

Why Choose Us?


No Loopholes™

We aren’t satisfied until you are 100% satisfied with our craftsmanship, products, and materials. If within two years of the date of installation, you are not completely satisfied with our service or the quality and performance of your home comfort system, and we can’t make it right for you then we will gladly remove the system and return your original investment.


No Hassles™

If your new system breaks down within the first year, leaving you without heating or cooling, we guarantee that we will repair your equipment within twenty-four hours of your call or we will fix your problem for free and give you $1,000 to apologize for the inconvenience.


Just Right™

Not too hot, not too cold… Just Right!™ If your system does not achieve the temperature you desire, we will make any modifications up to and including replacing the entire system at no charge.


We Respect You™

We promise that while our technicians are in your home, they will respect your property, protect it from damage, and leave their work area as clean as they found it. If we fail to meet any of the high standards we have set for ourselves, we will give you our full Five Year System Check-Up Package free of charge.

Call Us. We’re Very Friendly



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Over 40 Years of Expert Service

Since 1978, the friendly experts at Mr. Furnace have serviced over 15,000 homes and counting!

15, 000
Furnaces Installed
15, 000
Homes Serviced
Star Rating
On Google Reviews

Satisfaction Guaranteed

We guarantee all of our work for one year after the date of installation.

Decades of Experience

Mr. Furnace has been serving families in St. Catharines and the Niagara region since 1978.

Locally Owned & Operated

Our customers are our neighbours – we’ve been Serving local families for over forty years.

24-Hour Service

Reliable service, whenever you need it. No additional charge for after-hours, weekend, or holiday appointments.

Right Time™ Certified Technicians

All of our technicians undergo a thorough background check and extensive training.

Exceptional Customer Service

We have an average 4.5-star rating on Google, and the Better Business Bureau® has awarded us an A+ rating.

24/7 365 SERVICE

905-688-6296 Request a Quote
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