Tankless Water Heaters

Comfort You Can Count On

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Oshawa Tankless Water Heaters Installation & Maintenance Services

Fortis Heating & Air Conditioning understands that taking care of a home is hard work.

Taking care of a home without hot water is even harder work. Hot water allows us to do all of those tasks around the house that we need to do—washing dishes, doing laundry, mopping the floors, etc. But what about your hot shower in the morning or evening? Hot water is soothing, calming, comforting, and essential to our everyday health. Unfortunately, heating water can be expensive. Water tanks constantly heat water, running up your energy bill, even when you’re not using it. Fortunately, there is another option.

Fortis Heating & Air Conditioning help install tankless water heaters in Oshawa and Cobourg to increase efficiency and support homeowners by reducing energy costs. Tankless water heaters only heat up water when you need, and they’re highly durable, lasting up to a decade longer than regular tanks. This switch could help improve home comfort and efficiency.

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Fortis Heating & Air Conditioning

5.0

Based on 64 reviews

review us on

Lindsay Allen

10:39 31 Mar 25

I had the pleasure of having Craig come out to our house to fix our furnace a few times now.

Craig has always provided friendly, professional service and takes the time to explain the issue and answer any questions.

Throughout the service, Craig was meticulous and obviously took pride in his work. Craig went above and beyond and was respectful of our home making sure everything was clean and tidy before he left.

I highly recommend Fortis HVAC and will call them again should we have any further issues.

Response from the owner 11:07 31 Mar 25

Lindsay, thank you for your kind words and for taking the time to leave us a review! We truly appreciate your support and are glad we could provide you with great service. If you ever need anything in the future, don’t hesitate to reach out!

Elena Koskinas

19:39 29 Mar 25

Can’t say enough amazing things about the team at Fortis Heating. Nick & Craig are extremely professional, reliable and affordable! The quality of their work is exceptional. They did the job in a timely manner and left the place exactly as it was found. They were very quick, responsive and respectful of our time. We will be using Fortis Heating for many years to come and recommend them to all!

Response from the owner 02:50 30 Mar 25

Thank you, Elena, for the amazing Google review! We truly appreciate your kind words and support. If you ever need anything, Fortis Heating is always here to help!

Michael Druce

21:15 04 Feb 25

⭐⭐⭐⭐⭐

“I had an excellent experience with Fortis Heating and Air conditioner ! They were nothing but wonderful — punctual, professional, and incredibly easy to work with. Their communication was top-notch, keeping me informed every step of the way. It’s rare to find a company that delivers such smooth and stress-free service. Highly recommend for anyone needing HVAC work!”

Response from the owner 21:50 04 Feb 25

Thank you Mike for taking the time to write us a review. Really appreciate the kind words. Anything you need give us a call

Andrew Primeau

15:40 29 Oct 24

I couldn’t be happier with the service from Fortis Heating and Air Conditioning! They responded incredibly quickly and arrived right on time. Craig was incredibly knowledgeable and took the time to explain everything, making sure I was comfortable with each step. I appreciated their professionalism and expertise in getting the job done efficiently. Highly recommend Fortis for anyone needing fast, reliable, and knowledgeable HVAC service!

Response from the owner 00:25 31 Oct 24

Thank you so much for the kind words Andrew. Anything you need we are just a call away.

Andrea Brazil

12:56 21 Oct 24

We have used Fortis Heating and Cooling several times for service to both our furnace and AC. They have always been quick getting to us, super knowledgeable, honest and explains everything thoroughly. Extremely reasonable pricing. Would definitely recommend to anyone looking for H&C help, and will be using again in the future!

Response from the owner 13:16 21 Oct 24

Thank you so much Andrea for leaving us a great review. Anything you need just give us a call.

Nick Frankers

21:25 15 Oct 24

Craig did a great job with our furnace and replaced our faulty electrical switch! Everything is running super smoothly and we very much appreciate it!

Response from the owner 21:39 15 Oct 24

Thank you for the great Review Nick. Anything you need let us know.

Sandra Frankevych

21:13 15 Oct 24

Absolutely the best service. Efficient and very honest. Thank you Craig for checking our furnace and fireplace. Will only use your company for the future.

Response from the owner 21:40 15 Oct 24

Thank you Sandy for taking the time to write such kind words. Anything you need we are a call away.

Jennifer Fraser

13:51 07 Aug 24

Craig came to do a service on my air conditioning unit. I said it was not urgent, but he was able to come the very next day after I called . He did a thorough inspection. He came on time. Great professional, friendly service!!

Response from the owner 14:12 07 Aug 24

Thank you much for the review Jennifer, it was a pleasure meeting you.

Sheila Siciliano

20:47 01 Aug 24

Our air conditioner stopped working during a heat wave and Nick came out in less than an hour and solved the issue at a great price. Would highly recommend this professional and trustworthy business.

Response from the owner 02:50 05 Aug 24

Glad we could get you back up and running. Thank you leaving us a great review.

Samantha Burtch Whitteker

19:03 10 Jul 24

Nick did an excellent job cleaning and doing our regular furnace maintenance today. Was right on time, and did a great job explaining everything after he was done. Will be using them again!

Response from the owner 19:16 10 Jul 24

Thank you Samantha for taking the time to write us a review. Anything you need in the future we are a phone call away.

Current HVAC Installation Offers*

Ask about current HVAC installation promotions, including thermostat and warranty offers for qualifying packages.

Trained & Dedicated Tankless Water Heater technicians

Going tankless is an investment not only in the sustainability of your home but also in your pocketbook. Fortis Heating & Air Conditioning can install your tankless water heater today. Our trusted experts will assess any rewiring or changing of gas lines, then move forward with a quick and efficient install of the system. Fortis also services tankless water heaters in Oshawa so you never have to wonder where to go for maintenance and care for your system. Give us a call and our specialists will be happy to help.

Both owners of Fortis bring hands-on residential HVAC experience to local homeowners.

Why Choose Us for Tankless Water Heater Services in Oshawa?

We are a locally trusted HVAC company serving homeowners throughout Oshawa and the Durham Region. With hands-on experience installing and servicing tankless water heaters, we help homeowners enjoy efficient, on-demand hot water with solutions designed for long-term performance and energy savings.

Financing Options Available

Ask about available financing options for furnace and air conditioning projects. Financing is subject to provider approval and current terms.

Contact us today at 289-688-4822 for professional tankless water heater service in Oshawa.

Our technicians review your hot water usage, system requirements, and installation needs to determine whether a tankless system is the right fit for your home.

Modern Hot Water Solutions Built Around Your Home

Hot water should never be something you have to plan around. Tankless water heaters provide on-demand performance that keeps up with busy households while reducing energy waste. At Fortis Heating & Air Conditioning, we help homeowners across the Durham Region upgrade to efficient, space-saving tankless systems designed for long-term comfort.

Our team focuses on smart system selection, proper sizing, and precise installation to ensure your tankless water heater delivers consistent performance day after day. Whether you’re replacing an aging tank or exploring energy-efficient options for a new setup, Fortis provides clear guidance, expert workmanship, and dependable results you can rely on.

Frequently Asked Questions

How often should a tankless water heater be serviced?

A tankless should be serviced yearly but most importantly a flush should be done yearly to increase the lifetime of the heat exchanger.

How long to Tankless water heaters last?

Tankless water heater lifespan depends on equipment, water quality, usage, and maintenance.

Is it worth switching to tankless?

The big advantage to tankless hot water is that they use way less energy and only heat up when you need it. You can also enjoy the fact that your home will be sustainable and eco-friendly.

Is a tankless water heater suitable for a large household?

Yes, a properly sized tankless water heater can support larger households with multiple hot water demands. During an in-home assessment, our technicians evaluate water usage, flow rate needs, and system capacity to ensure the unit can deliver consistent hot water throughout your home.

Does installing a tankless water heater require upgrades to my home?

In some cases, upgrades such as gas line sizing, venting, or electrical capacity may be needed to support a tankless system. Our team reviews your existing setup and clearly explains any required modifications before installation begins, so there are no surprises.

Tankless Water Heater Installation, Flushing, Repair, and Maintenance

Tankless systems need correct sizing, venting, descaling, filter cleaning, and combustion checks. Fortis supports homeowners comparing tankless upgrades or troubleshooting error codes and inconsistent hot water.

For help with tankless water heaters, call (289) 688-4822 or request an appointment through the contact page.

Maintain Reliable Tankless Hot Water

Homeowners can ask about flushing, maintenance timing, error-code diagnosis, and whether the current system is sized properly for daily hot-water use. Fortis serves Oshawa, Whitby, Ajax, Pickering, Bowmanville, Cobourg, Courtice, Port Hope, Newcastle, and Clarington.