Expert Tankless Water Heater Installation
in Markham
Endless hot water on demand. Switch to tankless and save on energy bills in Markham — Navien, Rinnai, and more from licensed technicians.
Find the Perfect Tankless Water Heater for Your Markham Home
Upgrade Your Hot Water Tank with
Rinnai Tankless Water Heater
There’s never been a better time to upgrade from your old hot water tank to the world’s best-selling Rinnai tankless water heater. For a limited time, enjoy $500 OFF your new tankless system plus 50% OFF a premium water treatment unit—the perfect way to protect your investment and maximize performance. Our certified Rinnai ACE Pro installers provide professional installation across Ontario, ensuring proper system sizing, warranty protection, and long-term energy savings for your home.
Find the Perfect System for Your Home
$500 OFF – Rinnai Rx160iN
- No long term contract – low monthly payments available
- Standard tankless installation, removal & disposal of the existing water heater included
- No More Repair Bills: Extended 10 years parts and labor coverage available
- 9 Gallons Per minute hot water flow rate. 160k BTU/h. Supports 3-4 Fixtures
- Includes Rinnai Rx160iN maintenance valve kit
- Instant $500 off Rinnai RX160iN
$500 OFF – Rinnai Rx199iN
- No long term contract – low monthly payments available
- Standard tankless installation, removal & disposal of the existing water heater included
- No More Repair Bills: Extended 10 years parts and labor coverage available
- 11 Gallons Per minute hot water flow rate. 199k BTU/h. Supports 4-5 Fixtures
- Includes Rinnai Rx199iN maintenance valve kit
- Instant $500 off Rinnai RX199iN
$200 OFF – Rinnai RXP199iN
- Standard tankless installation, removal & disposal of the existing water heater included
- No More Repair Bills: Extended 10 years parts and labor coverage available
- 11 Gallons Per minute hot water flow rate. 199k BTU/h. Supports 4-5 Fixtures
- Includes Rinnai Rxp199iN maintenance valve kit
- Instant $200 off Rinnai RXP199iN
Brands We Carry
Book a Free Virtual Inspection
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Special Offers
Exclusive deals on our premium HVAC solutions
Featured Furnaces
500$ OFF On Featured Furnaces
Offer Expires: October 31, 2026
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Air Conditioner Deal
0% interest for 6 months on Featured Air Conditioners
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Discover MoreTankless Water Heater
$500 OFF Rinnai Tankless Water Heater
Offer Expires: October 31, 2026
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Heat Pump Upgrades
Get $7500 in Rebates when you upgrade to a Heat Pump
Offer Expires: October 31, 2026
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Combo HVAC Deal
Get $1000 OFF when you upgrade your furnace and air conditioner together.
Offer Expires: October 31, 2026
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Furnace & Heat Pump Combo
Save $1000 on Furnace & Heat Pump Combo Deal
Offer Expires: October 31, 2026
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Frequently Asked Questions
Everything Markham homeowners need to know about tankless water heater installation.
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How much does tankless water heater installation cost in Markham?
Tankless water heater installation in Markham typically costs between $2,500 and $5,000 installed, depending on the brand, model (condensing vs. non-condensing), and your existing setup. HVAC Ontario provides upfront transparent pricing — no hidden fees. Contact us for a free quote.
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Should I switch from a tank water heater to tankless in Markham?
Switching to tankless is a popular choice for Markham homeowners. Tankless units provide endless hot water on demand, take up significantly less space, last longer (20+ years vs 8-12 for tanks), and are up to 40% more energy efficient than traditional tank heaters. The upfront cost is higher, but the long-term savings are substantial.
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Does HVAC Ontario install Navien tankless water heaters in Markham?
Yes. HVAC Ontario is a Rinnai PRO dealer and installs Navien, Rinnai, and other top-rated tankless water heater brands in Markham. Both Navien and Rinnai are known for exceptional reliability, efficiency, and long-term performance. Our advisors help you choose the right model for your household's hot water demands.
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How long does tankless water heater installation take in Markham?
Most tankless water heater installations in Markham are completed in a single day — typically 4-6 hours for a straightforward swap. HVAC Ontario also offers same-day service for urgent replacements. If you have a leaking or failed water heater, call us now at 1-888-705-7368 for priority service.