Navien Tankless Water Heaters

With a Navien tankless, there will always be hot water for you, no matter how much hot water the rest of your family uses!

If you want endless hot water for your home for less energy, a Navien tankless water heater is the perfect solution. Our customers love Navien’s “3rd generation” models for their reliability and efficiency.

There are more advantages to installing a Navien – you can read them below. You can also learn about the different models available.

100% Satisfaction Guaranteed
DR HVAC BBB - Brampton, Georgetown, Hamilton

I was very happy with the service and quality work. Was able to find and fix a leaky gas line that other contractors could not. Was very professional on time and well priced. Would recommend to anyone in a heart beat. Thank you.

Tyler Evans

East York

We Install All Navien Models

Here is a little more about Navien tankless water heaters. Dr HVAC will help you figure out the best tankless models and how they meet your needs best.

Navien NPE-A Series: 180A, 210A, 240A

The Advanced series has an additional recirculation pump and internal buffer tank that Navien calls “Comfort Flow” technology. It maintains a steady supply of hot water, and eliminates the “cold water sandwich” caused by closing of hot water tap (which shuts off burners).

  • EnergyStar qualified.
  • Efficiency: 95% AFUE to 97% AFUE.
  • Uses efficient ultra-condensing technology.
  • Gas input requirements range from 15,000 – 199,000 BTU depending on model.
  • Flow rates start at 3.8 GPM (14 LPM) and go up to 11.2 GPM (42 LPM) depending on model and temperature desired.

Navien NPE-S Series: 150S, 180S, 210S, 240S

The Standard series doesn’t have the buffer tank and recirculation pump of the Advanced series (below), but if you don’t need these features you can get an extra few points of fuel efficiency. S-Series models can reach up to 98% efficiency.

  • EnergyStar qualified.
  • 96% – 99% efficiency.
  • Heat capacity from 15,000 – 199,900 BTU per hour, depending on model.
  • Flow rates range from 3.2 GPM (12 L/m) – 11.2 GPM (42 L/m) depending on model and desired temperature.

Residential Combi Boilers: 150 E, 180E, 210E, 240 E

A combi boiler can heat your home’s main water supply and can also be used to create hot water for your in-floor heating. If you’ve got tile floors you don’t want to go without it!

  • EnergyStar qualified.
  • 95% energy efficiency.
  • Heat capacity from 12,000 – 199,900 BTU per hour, depending on model.
  • Flow rates range from 2.6 GPM (9.8 L/m) – 4.5 GPM (17.0 L/m) at 77°F (43°C) depending on model.

Helpful Water Heater Terms and Definitions

In the lists above, we’ve mentioned some terms that may be new to you. Here’s what they mean.


This is the symbol for nitric oxide and nitrogen dioxide, generally measured in parts per million or PPM. These are natural products of the combustion process (your car also produces them), but they must be vented safely to the exterior of your home. Canada, the USA, and other countries are trying to reduce these, so the less the better.

Flow Rate

This shows how much hot water your system can produce. While this depends on the desired temperature, Navien provides measurements at a few standard temperatures so you can get the idea. Ask your Dr HVAC consultant for specifics.


This stands for annual fuel utilization efficiency, and is the percent of fuel that gets converted to heat. As you might guess, the higher the number the better, as you want as little wastage as possible.

Why Our Customers Love Navien

Tankless water heaters are no longer a new technology, and Navien has made sure its latest generation has great features like the following.

Easier and cheaper installation using your existing gas line

For most brands, you need to pay to switch your gas pipes to a bigger gauge. Naviens use the same ½” gas lines that your existing water tank uses.

Maximum energy efficiency available on the market today

Thanks to condensing technology, heat that would ordinarily be wasted is reclaimed and used to heat your water.

Only One Unit

One unit can handle both your in-floor heating and your hot water supply needs.

Easy venting solution

Naviens are so efficient that ordinary 2” PVC pipe can be used for venting. No need to spend more on copper!

Frees floor space – perfect for small homes

A Navien tankless mounts right on the wall of your basement. A tank takes up 9 – 16 square feet of floor space.

Can handle small or large hot water needs

If needed, two or more units can be “daisy chained” together.

Say goodbye to flooding when tanks break down

Traditional tanks can flood basements when the bottom corrodes out. Naviens have an emergency shut off if a problem occurs.

Superior quality parts

The heat exchangers are made of stainless steel, not copper. They resist corrosion and hard water scale buildup.

Get money back when government rebates are available

Ask Dr HVAC which rebates are on now.

Great warranty

15 years on the heat exchanger & 5 years on other parts and components

Ready to Get Started?

Navien tankless water heaters have ultra low NOx emissions at less than 20 PPM!

All the hot water you’ll ever need!

Dr HVAC is accredited by these independent organizations.

At Dr HVAC, we are committed to providing you with the best possible home heating experience.

Is a Tankless Right for You?

Some people love the endless hot water and energy efficiency of a tankless. For others, a traditional tank makes more sense. Dr HVAC carries both, and we’ll help you make an educated decision on making the right choice for your situation.

Learn about Tankless Water Heaters

Expert Installation Makes a Difference

Here in the Toronto area, it’s critical to get the right size tankless water heater. If you don’t, you won’t get truly hot water in winter. As an appliance that uses natural gas, it’s also essential to get a licensed expert who will install your water heater according to current code.

To give our customers peace of mind, we offer a 100% satisfaction guarantee: if your tankless water heater does not perform as promised, we will return and fix it for free. If needed we will replace it with a similar model at no cost to you.

More importantly, we never rush your decision. We give you a complete sales quote in writing, ensuring it has all costs are included. You’ll get the full cost up front, including labour. Then we give you the space you need to make your decision.

To get started finding your new ideal hot water system, just ask for a free quote.