Hot Water Whenever You Want It

Tankless hot water heaters produce hot water on demand, so hot water is always available. Tankless hot water heaters are also smaller, more energy efficient, and longer lasting than traditional tank hot water heaters.

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Tankless Hot Water Heater Services for St. Catharines & the Niagara Region

What Sets Us Apart

Our team of hot water heater installation experts will install your new tankless hot water heater, check that it is running smoothly, and answer any questions you may have.

In recognition of our continued commitment to sterling customer service, the Better Business Bureau® awarded us an A+ rating. We also have an average of 4.5 stars on Google.

We maintain our high standards by making sure that all of our technicians have the right knowledge and certification for the job, and receive ongoing training. We also stand behind all of the work we do and back our installations with a one year guarantee. All of our employees are required to pass a background check and be bondable.

Our high standards, keen attention to detail, and friendly expert staff have made us the company of choice for home comfort in St. Catharines and the Niagara region since 1978.

What Customers Say

“A big thank you to the two employees (Tyler and Everit) that installed our new furnace, our first a/c unit and our first tankless water system. They also installed some new ducting to heat up our upstairs with little mess and neatly installed with just a small bulkhead to hide it. Also a big Thank You to Scott who guided us through the many different options that were available.”

- John M.

“Your service person Zachery was polite, very professional and knowledgeable.

Your service from booking our appointment until Zachery finished his maintenance check was a very pleasant experience. Thank You.”

- Bonnie M.

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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

Tankless water heaters perform the same function as traditional water heaters, but they do it in a different way. Instead of storing the hot water in a tank, tankless water heaters produce hot water on-demand. This method provides your home with a continuous and almost endless supply of hot water.

Tankless water heaters need regular maintenance to perform their best, just like a furnace or air conditioner. We recommend an annual maintenance appointment that may also include flushing of your system. Flushing of your tankless water heater makes sure excess sediments or minerals don’t build up over time.

All kinds of homes can benefit from tankless water heaters, especially homes that don’t have room for larger water tanks. Tankless water heaters take up less room and they have the added benefit of energy savings because they only heat the water that is actually being used. Additionally, tankless units can sometimes last longer and dispense cleaner water.

The estimated installation time for tankless water heaters is between 3 and 5 hours, but keep in mind that every home is different. Installation time can be impacted by factors like what kind of water heater we are replacing and your water heater’s location inside your home. Regardless, we always try to install your new unit as efficiently as possible.

You should prepare your home for installation by clearing the areas we’ll be working in. This includes making a path through your home and removing any belongings from your furnace room. By removing any clutter you help make our job safer and you help the installation go as quickly as possible.

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.

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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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