Tankless Water Heater Installation in GTA

At HVAC Group, we provide fast, reliable heater repair services across the GTA. Whether your furnace won’t start, airflow is weak, or temperatures are uneven, our certified technicians deliver expert repairs. Same-day emergency service also available to restore your heat quickly.

HVAC Group technician installing a Navien tankless water heater for an energy-efficient and space-saving hot water solution
A professionally installed tankless water heater providing an energy-efficient and continuous hot water supply

Hot Water Anytime

Upgrade to Smart Heating: GTA’s Trusted Tankless Water Heater Installation Service

Tired of running out of hot water? A tankless water heater delivers endless hot water, lower energy bills, and a compact, space-saving design. At HVAC Group, we install high-efficiency gas and electric systems with smart thermostats controls for easy temperature management. Our certified technicians ensure a seamless installation, handling venting, gas lines, and safety checks for homes and businesses across the GTA.

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5.0
Based on 216 reviews
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michael wickeler profile picturemichael wickeler
16:50 06 Aug 25
HVAC GROUP punctual and very efficient at their job. Figured out the problem quickly and fixed the Air conditioner.
Response from the owner 17:07 06 Aug 25
Thank you, Michael, for the great review! We’re glad we could quickly diagnose and repair the rooftop unit at your Etobicoke property. From clearing the clogged drain tube and drain plate to cleaning the dirty coil fins and fixing the A/C relay connection — our goal is always fast, reliable service. We appreciate your trust in HVAC GROUP for your rooftop repair needs in Etobicoke. Don’t hesitate to reach out anytime you need us!
Erica Larry profile pictureErica Larry
22:45 01 Aug 25
Amazing service from Yuri! We will be using you again in the near future. Thank you again.
Response from the owner 23:14 01 Aug 25
Thank you so much for the 5-star review, Erica! We’re glad we could help with your A/C not cooling at your home on Ferndale Ave in Toronto. Our team at HVAC-GROUP quickly cleared the blocked furnace room drain and recharged your A/C unit with the proper level of R410A refrigerant for efficient cooling. Your comfort is our priority. If you ever need HVAC service in Toronto again, we’re just a call away!
Max Peters profile pictureMax Peters
15:47 31 Jul 25
Yuri and team quickly diagnosed my A/C issue and had the system back and running, with a very quick response time. Would recommend to anyone.
Response from the owner 16:19 31 Jul 25
Thank you Max so much for your kind words and 5-star review! We’re glad we could help get your AC back up and running quickly. Replacing the failed start/run capacitor was a simple fix, and we’re always happy to provide fast, reliable air conditioning repair service in the Etobicoke area. If you or anyone you know ever needs HVAC service in Etobicoke or the surrounding areas, HVAC Group is here to help!
Dave Neeb profile pictureDave Neeb
16:03 30 Jul 25
Excellent and thorough, great pricing. Thanks again.
Response from the owner 17:28 30 Jul 25
Thank you, David! We’re glad we could help get your AC up and running again. We appreciate your kind words about our service and pricing—it means a lot. If you ever need anything in the future, don’t hesitate to reach out. Stay cool!
John Hamilton profile pictureJohn Hamilton
19:58 25 Jul 25
The HVAC Group did a fantastic job restoring our broken AC . Quality professional workmanship at a fair price .We will definitely call them back next time .
Response from the owner 20:48 25 Jul 25
Thank you, John, for the 5-star review! We’re glad we could help with your AC repair and get your system back up and running. It’s great to hear you appreciated the quality workmanship and fair pricing. We look forward to helping you again whenever you need us! – HVAC Group
Katie Ogiba profile pictureKatie Ogiba
01:17 25 Jun 25
HVAC Group came recommended by a friend when our AC stopped working on a 38 degree day. We had called other services and either couldn't get through or everyone was booked. When I spoke to Yiri he said it was so busy they were booked until next week (which I expected as every other place said the same thing). But he stayed on the phone to ask a few questions about the unit. He was kind, and you can just tell when someone actually cares - he didn't have to talk me through the possible issues etc. He ended up sending someone out that evening who fixed it within 15 minutes. We are so appreciated of the service- both the actual work done and the customer care. Highly recommend. Thank you to both Yiris!
Response from the owner 01:59 25 Jun 25
Thank you, Katie, for taking the time to leave us a 5-star review!We’re glad we could help with your AC not cooling issue — it really means a lot to us.At HVAC Group, we’re always happy to assist both returning and new customers with air conditioning repairs, new AC installations, or furnace service during the heating season. Don’t hesitate to reach out if you ever need help again.Thanks for trusting us!— HVAC Group
Andre profile pictureAndre
02:52 19 Jun 25
Great service - fast, knowledgeable, thoughtful, very professional! Helped me well and fast!
Response from the owner 11:41 19 Jun 25
Thank you, Andre, for taking the time to leave a review! We truly appreciate your support. Don’t hesitate to reach out if you ever need air conditioning or furnace repair in the future — we’re always here to help!
HVAC Group responded quickly and had my noisy air conditioner fixed within a day. Their professionalism and customer-first approach really stood out. They go above and beyond—highly recommended!
Response from the owner 03:37 11 Jun 25
Thank you for the great review! We’re glad we could help with your noisy air conditioner so quickly. When you contacted us about your Lennox AC making unusual noise, our technician arrived the same day and found the outdoor condenser was clogged and the fan motor was extremely noisy. Since the AC parts warranty was still valid, we replaced the faulty motor and thoroughly cleaned the unit to restore quiet and efficient operation.We appreciate you choosing HVAC Group for your local AC repair in Mississauga. Your comfort is our priority!
Daniel Liu profile pictureDaniel Liu
19:04 04 Jun 25
HVAC group has been absolutely fantastic to help us replace our air conditioner. From diagnosing to replacement took only 2 days (since the replacement unit was in stock). This is especially appreciated as the weather was getting hot fast and I have a newborn baby that cries in the heat. Yura is extremely knowledgeable and Yuriy installed the unit professionally with no interruption and minimal noise to our house’s activities. Thank you for your help! HVAC group comes highly recommended and I’ll be reaching out to them for routine maintenance!
Response from the owner 22:00 04 Jun 25
Thank you so much for the wonderful 5-star review! We’re thrilled to hear you were happy with your Lennox AC installation experience. We understand how important a cool home is—especially with a newborn—and we’re glad we could respond quickly and get everything running smoothly in just two days. Yura and Yuriy truly appreciate your kind words. We’re always here when you need us, and we look forward to helping with your future maintenance needs. Thanks again for trusting HVAC Group!
Pranav Kumar profile picturePranav Kumar
22:15 01 Jun 25
Got my thermostat changed and replaced the AC too. The price point is completely trust worthy and the service highly professional!
Response from the owner 22:57 01 Jun 25
Hi Pranav,Thank you so much for the great review! We’re glad you’re happy with the Lennox AC installation and thermostat replacement. It means a lot to hear that you found our pricing trustworthy and our service professional. We truly appreciate your support and look forward to helping you again in the future!— HVAC Group
Olena M profile pictureOlena M
21:03 01 Apr 24
Amazing service, quick and clean replacement of the old water tank, we definitely recommend this team to anyone who would need installation or replacement
Daniel Campana profile pictureDaniel Campana
16:25 23 Mar 24
I had an issue with my Rheem furnace not heating, so I reached out to HVAC-group for assistance. The technician was quick to identify the problem as a faulty flame sensor. The service was prompt, efficient, and ultimately effective. I'm very pleased with their work and would highly recommend their services to anyone facing HVAC issues.
lakhbir phull profile picturelakhbir phull
16:34 10 Mar 24
Excellent service, immediate response, reasonable price, very happy with their services.
Tina Obersnel profile pictureTina Obersnel
12:18 29 Jan 24
I highly recommend calling HVAC-GROUP for your maintenance and service needs. Yuriy was great. Quick to respond and resolve the issue. I am very happy with the outcome.
VIKKY profile pictureVIKKY
19:29 17 Jan 24
I was having problem with a tankless water heater here in edmonton !
I just googled about it and i found his contact number , and i got my problem solved , because i called him and he actually explained everything very clearly and amazingly! Thank you so much
My tankless water heater was showing E110 , i was unable to get that, but he told me that you need clean the air intake filter then i open the panel and did exactly what he told me to do. By that why i got my problem solved!
Thanks buddy
Stan Ivanov profile pictureStan Ivanov
15:37 20 Dec 23
I came from vacation to a broken furnace and a cold house. I called HVAC group late at night and they were able to send someone the next morning.

Technician was very professional, found that I had an igniter problem, had a spare part with him and solved the problem within an hour.

Reasonable pricing and very professional. Highly recommended!!!
Ingrid Turner profile pictureIngrid Turner
07:26 13 Dec 23
Yuri is a true professional and is a very knowledgeable expert about furnaces.
I called him for advice when another well known Hvac company wrongly diagnosed my Trane furnace blower noise and told me I needed to undergo a $1500 repair. Yuri quickly assessed the problem and voila no more blower motor problems. All for $140!!
Thank you Yuri! I highly recommend your service, honesty and expertise.
Anisha Mathews profile pictureAnisha Mathews
18:19 29 Sep 23
Yuriy was very informative and helpful in selecting and installing our new furnace. His prices are very reasonable and the work was completed on time. He was also helpful in setting up our thermostat. I highly recommend his services!
Marah Di Nola profile pictureMarah Di Nola
21:36 14 Aug 23
Exceptional customer service, immediate response by phone & text, professional workmanship!! Clean respectful, very impressed with the workmanship. Thank you once again. Highly recommend for HVAC, water heater replacement. Answered all my queries without hesitation or reservation. Will definitely 💯 use again!!

Water Heater Experts

Customized Installation Solutions to Fit Your Needs

New Tankless Water Heater Installation

Upgrade to a high-efficiency tankless water heater for endless hot water, reduced standby energy loss, and compact design. We handle gas line setup, venting, and system calibration for optimal performance.

Replacement of Traditional Water Heaters

Ditch your bulky storage water heater for a modern on-demand system. We safely remove old units, upgrade plumbing and venting, and install condensing or non-condensing tankless models.

System Sizing and Selection

Choosing the right system matters. We assess household water demand, flow rates (GPM), and gas or electric supply to recommend a properly sized tankless unit for maximum efficiency.

HVAC Group technician performing water heater repair in Mississauga, ensuring efficient hot water supply

Professional Installation

Our certified technicians ensure safe and precise tankless water heater installation gas line connections, pressure adjustments, venting configurations, and thermostat calibration.

Post-Installation Support

We provide ongoing maintenance, system troubleshooting, and efficiency checks. Our team offers descaling, filter replacements, and performance optimization to keep your unit running smoothly.

Having a HVAC problem? We’ll FIX it today!

We’re available 24/7 to restore your comfort. Call now for same-day service!

Hot Water Anytime

Signs You Should Upgrade to a Tankless Water Heater

Running Out of Hot Water Frequently

If your showers turn cold too soon, your current water heater may be undersized. Tankless water heaters heat water on demand, so you’ll never run out, even with multiple taps running.

Rising Energy Bills

Traditional tanks constantly heat water, wasting energy. Tankless models only activate when needed, cut standby heat loss and reduce energy consumption by up to 50%.

Fluctuating Water Temperatures

Uneven heating is often caused by sediment buildup, worn-out heating elements, or an aging unit. A tankless system delivers stable, precise temperatures without unexpected cold bursts.

Leaking or Rusty Water Heater Tank

Rust and leaks signal corrosion inside the tank, which can lead to costly water damage and contamination. Tankless systems eliminate storage tanks, reducing leak risks and maintenance.

HVAC Group technician servicing a Navien tankless water heater to restore efficiency and performance

Limited Space in Your Home

Traditional water heaters take up valuable floor space. Tankless units are compact, wall-mounted, and perfect for condos, apartments, or homes needing extra storage room.

You Want Smart Home Integration

Modern tankless heaters have Wi-Fi-enabled controls, which allow you to adjust settings remotely, monitor usage, and integrate with smart home systems like Google Home or Alexa.

You Want a More Eco-Friendly Home

Tankless water heaters reduce carbon emissions, water waste, and gas usage. Many models include low-NOx burners, high-efficiency heating, and recirculation pumps for sustainability.

Water Heater is Over 10-15 Years Old

Older storage water heaters lose efficiency, require frequent repairs, and increase energy costs. Tankless systems last 20+ years, offering better performance and lower maintenance needs.

From Gas to Electric – We’ve Got Your Tankless Water Heater Covered

Gas-Powered Tankless Water Heaters

These systems use high-BTU burners for on-demand heating to deliver unlimited hot water with high flow rates. We handle gas line connections, venting, and combustion safety checks.

Perfect for smaller homes and point-of-use applications, these units feature heating coils, digital thermostats, and low standby energy loss. We ensure proper wiring and breaker capacity.

Hybrid systems combine heat pump technology with tankless efficiency for superior energy savings and rapid water heating. We install smart controls and optimize temperature settings.

Designed for single fixtures like sinks, dishwashers, or showers, these compact units reduce lag time and minimize energy waste. We install under-sink, inline, or wall-mounted models.

Qulaity Brands We Work With

From Carrier to Trane – The Best AC Brands We Work With

Heat Water Right

From Condos to Commercial Buildings – We Install Everywhere

Residential

We install high-efficiency tankless water heaters in homes, condos, and apartments, ensuring consistent hot water, optimized flow rates, and precise temperature control. Our licensed technicians handle gas line connections, venting, and electrical upgrades for a seamless setup.

Commercial

Businesses require reliable hot water for daily operations. We install high-capacity tankless systems for restaurants, hotels, office buildings, and multi-unit properties. We handle multiple unit setups, recirculation pumps, advanced venting configurations, and high-GPM output optimization to support heavy usage.

Navien ENERGY STAR tankless water heater installed indoors with gas and water lines, providing efficient on-demand hot water system

Stay Warm, Always

Emergency Tankless Water Heater Services – Available 24/7

No hot water? Our 24/7 emergency service ensures fast diagnostics and repairs for ignition failures, gas leaks, pressure fluctuations, and sensor malfunctions. We handle error code troubleshooting, burner system issues, and venting blockages to restore hot water fast. Our certified technicians are ready to provide same-day service across the GTA.

Emergency Water Heater Services

Get fast, same-day service with 24/7 availability for all your water heater emergencies. Whether it’s a sudden breakdown or no hot water, our expert technicians are ready to restore your comfort. Call now, and we’ll send help right to your door

HVAC Group technician performing maintenance on a tankless water heater to ensure efficient operation

Your Heating Experts

Save More, Waste Less – Energy-Efficient Water Heating Solutions

Upgrade to a high-efficiency tankless water heater for lower energy bills and reduced water waste. Our on-demand heating systems use condensing technology, recirculation pumps, and low-NOx burners to optimize flow rates, eliminate standby heat loss, and improve efficiency.

Why to Work with Us

Why Should You Choose Us For Tankless Water Heater Installation

Experience and Expertise

With years of industry experience, we specialize in tankless water heater sizing, venting configurations, gas line connections, and high-efficiency system installations for homes and businesses.

Fast & Reliable Service

Our team provides same-day installation, handling unit mounting, plumbing connections, and thermostat calibration efficiently to minimize downtime and ensure immediate hot water access.

Certified & Experienced Technicians

Our licensed HVAC professionals handle gas, electric, and hybrid tankless water heaters, ensuring safe installations, proper combustion settings, and energy-efficient performance.

Installation for All Major Brands

We install and service Rinnai, Navien, Noritz, Bosch, Rheem, Takagi, AO Smith, and Stiebel Eltron tankless water heaters, offering OEM parts and expert system integration.

High-Quality Tools & Equipment

We use precision manifold gauges, combustion analyzers, and digital flow rate testers to guarantee optimal gas pressure regulation, water flow adjustments, and seamless unit integration.

Long-Term Efficiency & Performance

We optimize GPM flow rates, temperature regulation, and recirculation pump settings to ensure consistent hot water, lower energy consumption, and extended system lifespan.

Safety Codes & Regulations

We ensure all installations meet Ontario gas codes, CSA safety standards, and manufacturer guidelines for proper venting, pressure regulation, and carbon monoxide safety compliance.

Competitive Pricing

We offer transparent pricing with no hidden fees to provide detailed cost breakdowns for installation, venting modifications, gas line upgrades, and long-term energy savings calculations.

Comfort Made Easy

Real Results from HVAC-Group Inc

Quality First HVAC Services Just A Call Away!

Business Hours
Monday to Friday: 8 a.m.–9 p.m.
Saturday and Sunday: 9 a.m.–2 p.m.

Location We Serve

HVAC-Group Inc. has been servicing Toronto and GTA surrounding areas for more than 20 year.

Summer's Calling! Get Our Exclusive AC Installation Deals

HVAC Group branded service van displaying heating and cooling repair services – Mobile HVAC service

Frequently Asked Questions

Can a tankless hot water heater be repaired?

Yes, most tankless water heater issues can be repaired. Common fixes include ignition system repairs, sensor replacements, burner cleaning, and heat exchanger descaling.

A well-maintained tankless water heater lasts 15–20 years. Regular descaling, filter cleaning, and component inspections help extend its lifespan.

Repairs depend on the issue. We diagnose error codes, flush scale buildup, adjust gas pressure, clean sensors, and repair electrical components to restore proper function.

Yes, they require regular maintenance and occasional repairs. Technicians can replace parts, clean filters, descale the heat exchanger, and troubleshoot system malfunctions.

Yes, especially in areas with hard water. Flushing removes mineral buildup, prevents clogs, and maintains heating efficiency, extending the unit’s lifespan.

Labor costs vary based on the issue and brand. Basic repairs start at $150–$300, while complex fixes like heat exchanger replacement can exceed $500.

Common causes include ignition failure, a faulty flow sensor, clogged filters, or a gas supply issue. A professional diagnosis can pinpoint and resolve the problem.

Signs include fluctuating temperatures, error codes, unusual noises, low water pressure, and leaks. If you notice these issues, schedule a repair immediately.

Some minor tasks, like filter cleaning or resetting the unit, can be done by homeowners. However, gas, electrical, and component repairs should be handled by a certified technician.

Annual maintenance is recommended to keep your system running efficiently. This includes flushing the heat exchanger, cleaning filters, checking venting, and testing gas pressure.

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