Tankless Water Heaters
Tankless water heater installation in place of a tank costs from $4,600 plus HST with a Navien unit. Replacing an existing tankless costs from $3,300, because the venting and gas are already in place.
New Dundee, Wilmot Township, Kitchener, Waterloo, Cambridge, Guelph, Milton, Halton Hills, Acton, Rockwood and Georgetown
Before you decide
Tankless only makes sense where the house can take it. Three things decide that.
Coming off a tank also means new venting, core holes, gas work and plumbing changes. That is the difference between the two price columns below. If your house does not have the right conditions, the price changes or tankless is not the right call, and we will tell you which before you commit to anything.
Tankless prices
All prices plus HST. Every price includes the unit, the installation and a new mixing valve.
| Navien model | Replacing a tank | Replacing a tankless |
|---|---|---|
| NPE-180S2 | $4,600 | $3,300 |
| NPE-180A2 | $5,000 | $3,700 |
| NPE-210S2 | $4,850 | $3,700 |
| NPE-210A2 | $5,300 | $4,100 |
| NPE-240S2 | $5,100 | $4,000 |
| NPE-240A2 | $5,650 | $4,500 |
A swap is a like-for-like tankless replacement: the venting, gas and nearby plumbing are already in place, which is why it costs less. The A2 models have a built-in recirculation pump and buffer tank. Tank water heater prices are on our water heater replacement page.
Tank or tankless
A tank stores hot water and reheats it all day. A tankless unit heats water only when a tap is open, so it does not run out partway through a second shower, and it gives you floor space back.
The trade-off is the price. A like-for-like 50 gallon power-vented gas tank is $2,900 plus HST, against $4,600 and up for tankless replacing a tank.
Hard water matters here. Scale builds up inside anything that heats water, including a tankless heat exchanger, and Navien’s warranty does not cover scale damage. Across most of Waterloo Region, a water softener protects it.
Locally owned since 2018
Questions we get asked
A Navien tankless replacing a tank is $4,600 to $5,650 plus HST, depending on the model. Replacing an existing tankless is $3,300 to $4,500 plus HST. Every price includes the unit, the installation and a new mixing valve.
Coming off a tank needs new venting, core holes through the wall, gas work and plumbing changes. When you replace a tankless, all of that is already there.
No. It needs an exterior wall for the venting, gas or propane near the unit and wall space to mount it. We check before you commit.
A tankless unit often lasts 15 to 20 years or more with regular maintenance, compared with about 8 to 12 years for a tank.
Navien’s residential warranty covers the heat exchanger for 15 years, parts for 5 years and labour for 1 year, from the date of installation. It requires installation by a licensed contractor and regular maintenance, and it does not cover damage from hard water scale. Our own 1-year workmanship warranty covers the installation when we supply the unit and parts.
Tankless Water Heaters
Book a time and we will check whether your house suits tankless, then give you the price in writing.
CALL US! 548-255-2662
