Tankless Water Heaters
NPE-A2 Series
NPE-S2 Series
Navien NPE-2 Series high efficiency tankless water heaters provide endless domestic hot water, all while keeping your utility bills low.
Condensing Tankless Water Heaters
Navien Premium Efficiency condensing tankless water heaters are the #1 selling high efficiency condensing tankless water heaters in North America. The NPE-2 series offers ultra-high efficiency up to 0.96 UEF to keep your utility bills low, endless hot water, and exclusive ComfortFlow® technology with a built-in recirculation pump and buffer tank.
New NPE-A2 Series
Three NPE-A2 Advanced Premium models offer a Uniform Energy Factor up to .95 and feature Navien’s patented ComfortFlow system.
New NPE-S2 Series
Four NPE-S2 Standard Premium models offer a Uniform Energy Factor up to .96, providing more output, lower installation costs and lower operating costs.
Condensing VS Non-Condensing
Tankless Water Heaters
What’s the difference between condensing and non-condensing tankless water heaters?
| Condensing | Non-Condensing | |
|---|---|---|
| Initial cost | Usually higher than comparable non-condensing | Usually lower than comparable condensing |
| Long term operating cost | Lower than typical non-condensing tankless and storage tank system | Could be higher than condensing but lower than storage tank systems |
| Efficiency | Ultra-high Efficiency (UEF up to .96) | High Efficiency (UEF > .80) |
| Maintenance requirement | Annual service recommended | Minimal |
| Venting | PVC acceptable | 3" x 5" metal concentric required |
| Installation Location | Indoor or Outdoor | Choice of interior or exterior |
| Durability | Stainless steel heat exchanger extend service life | Stainless steel heat exchanger extend service life |
| Dimensions | Slightly larger than non-condensing, about 70-80% smaller than tank system | Slightly smaller than condensing, 80% smaller than tank system |
All the hot water you need, for as long as you need it
How Condensing Tankless Water Heaters Work
Ultra high-efficiency tankless water heaters—also known as condensing tankless—use two heat exchangers to supply endless hot water when you turn on a faucet. They use less energy (and money) than traditional water heaters because they don't need to reheat the water over and over.
- When a hot water tap is opened, the tankless water heater detects the flow
- The flow sensor activates to determine the amount of hot water needed
- The igniter activates
- The gas control valve opens to supply the correct amount of gas
- The fan and venturi activate to provide the correct amount of gas and fuel
- The premix burner ignites providing a flame to heat the water
- Cold water is pre-heated in the secondary heat exchanger
- Pre-heated water passes from the secondary to the primary heat exchanger
- The unit determines outgoing set temperature and adjusts the flame to heat the water
- Heated water moves to the buffer tank
- Desired hot water amount delivered to the faucet
Navien Condensing Tankless Water Heaters
The Navien NPE-2 series is a line of high-efficiency condensing tankless water heaters featuring a user-friendly control panel. These tankless water heaters can be installed indoors or outdoors, for residential or commercial use.
Navien NPE-2 High Efficiency Condensing
Tankless Water Heaters
NPE-A2 Series
Advanced condensing tankless water heaters featuring Navien’s patented ComfortFlow® system.
NPE-180A2
Max Input: 150,000 BTU/h Indoor or outdoor wall-hung Residential/Commercial ComfortFlow® Technology
NPE-210A2
Max Input: 180,000 BTU/h Indoor or outdoor wall-hung Residential/Commercial ComfortFlow® Technology
NPE-240A2
Max Input: 199,900 BTU/h Indoor or outdoor wall-hung Residential/Commercial ComfortFlow® Technology
NPE-S2 Series
Navien’s standard ultra high-efficiency condensing tankless water heaters.
NPE-150S2
Max Input: 120,000 BTU/h Indoor or outdoor wall-hung Residential/Commercial ComfortFlow® Technology
NPE-180S2
Max Input: 150,000 BTU/h Indoor or outdoor wall-hung Residential/Commercial ComfortFlow® Technology
NPE-210S2
Max Input: 180,000 BTU/h Indoor or outdoor wall-hung Residential/Commercial ComfortFlow® Technology
NPE-240S2
Max Input: 199,900 BTU/h Indoor or outdoor wall-hung Residential/Commercial ComfortFlow® Technology
NAVIEN TANKLESS WATER HEATERS FEATURES
Bulky tanks are history...
Navien high efficiency
tankless is the future
- Endless hot water when you want it
- Compact space-saving design
- Lower energy bills
- Longer life than tanks
- 15 year warranty dual stainless steel heat exchangers
Navien NPE-2 Series condensing tankless water heaters deliver an endless supply of hot water for any size home.
Besides providing hot water where and when it’s needed, the NPE-2 Series offer homeowners the following benefits:
- Much more energy efficient than old fashioned tank systems
- Ultra high energy efficiency —
up to 0.96 UEF - Backed by the industry's strongest warranty – 15 years on heat exchangers
- Energy Star certified
- Takes about 80% less space than old fashioned tank heaters
- Longer lasting than tank heaters
- Easy to use control panel
- Elegant, clean appearance
- Improves resale value
- Ideal for replacements or new construction
Benefits of Navien Condensing Tankless Water Heaters
The Ultimate Endless Hot Water Solution For Your Home
Durable, Long-Lasting Construction
Navien NPE-2 condensing tankless water heaters use durable dual stainless steel heat exchangers
Eco-Friendly
Condensing technology reduces energy consumption and greenhouse gas emissions
Control from Your Phone
Optional NaviLink™ Wi-Fi control system gives you access to your Navien systems from anywhere in the world
Multiple venting options
For homes with extra high demand, NPE-2 Series units can be cascaded without an external control
On-demand Recirculation
HotButton on-demand recirculation option with built-in controller
Optional Forced Air Systems
H2Air combination space heating and domestic hot water supply optional for NPE-A2 models
Tankless Water Heaters FAQs
Below are the top questions (and answers) about tankless water heaters from our customer service team.
- How do you install a tankless water heater?
- Is it worth switching to a tankless water heater?
- What size tankless water heater do I need?
- Where can I buy Navien tankless water heaters?
- Do tankless water heaters need a condensate drain?
- How often do I need to descale my tankless water heater?
- How long do Navien tankless water heaters last?
The ultimate in energy efficiency
Navien condensing technology provides up to 0.96 UEF. These extremely efficient and eco-friendly units provide extra energy savings over traditional tank and non-condensing tankless water heaters.
Operating Cost
Navien Tankless - 179.0 therms - $250*
Other Tankless - 228 therms - $319
189 Liter Tank - 293 therms - $409
* Based on Energy Guide cost estimates using $1.40 per therm of natural gas. Cost is in Canadian dollars.Protect the environment
as you add value
Navien condensing stainless steel heat exchangers recover extra heat that would be lost in non-condensing boilers. The result is a reduction in energy consumption, lower CO2 emissions and low exhaust temperatures allowing the use of less expensive venting materials such as Schedule 40 PVC.
Find a Navien Tankless Water Heater Installer Near You