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Outdoor wall-hung tankless gas water heaters available in natural gas (NG) or liquid propane (LP).
The NPN series is the first non-condensing outdoor gas tankless water heater to offer a stainless steel heat exchanger which provides very low NOx comparable to our NPE series.
user-friendly controls allow you to adjust water temperature, operation status and troubleshooting.
Navien gas outdoor tankless water heaters can be cascaded to meet high-volume hot water demand. All NPN-E units include built-in recirculation control and software, and a water adjustment valve (WAV) and mixing valve to stabilize temperature during flow changes. The built-in air pressure sensor (APS) monitors and maintains air/gas pressure ratio during operation and ensures consistent hot water output during partial air blockage.
Available in NG or LP
Available in NG or LP
Available in NG or LP
NaviLink makes it easy to communicate with your outdoor tankless water heater anywhere internet service is accessible. The NaviLink module attaches easily to any new or existing* Navien gas tankless water heater.
* Existing installations may require the purchase of a new main PCB and front control panel.
Available for Download
on IOS or Android
At the push of a button, the Navien HotButton activates an external pump and heats water in the supply lines to provide hot water whenever it’s needed.
Outdoor tankless water heaters generally have a lifespan of about 15 to 20 years. Navien heat exchangers have a warranty of 15 years.
Navien tankless water heaters provide on-demand hot water. A gas line, sufficient combustion air, a vent to evacuate combustion gas, and an electrical outlet are required to operate the gas unit properly.
Using an outside tankless water heater frees up space indoors. No additional venting is required when installing an NPN-E Series tankless water heater outside in non-freezing regions.
A gas tankless water heater installed outdoors will be exposed to the elements, so you should not install a tanklesswater heater outdoors if your region experiences freezing temperatures. Depending on the layout of your property and local building codes, there may be restrictions on where you can install an outdoor tankless water heater. It will need to be a certain distance away from windows, doors and ventilation intakes to prevent exhaust gas from entering the building.
Choosing between an indoor or outdoor tankless water heater depends on your region's climate, the space you have available for installation, and local code requirements. Outdoor water heaters should not be installed if there will be freezing temperatures. But in milder regions, an outdoor water heater can be a good solution if an indoor unit would require extensive or complex venting.
Installing an outdoor water heater should always be done by a certified Navien technician by a licensed plumber - you can find an installer here. When installing an outdoor tankless water heater it's important to choose a location that allows maintenance access, satisfies local codes and proper installation requirements. You'll also need to make sure the wall can support the weight of the unit, and allow for connections to gas, water and electrical supply.
No, you cannot install an outdoor unit in a garage. Outdoor units can only be installed outdoors.
In comparison with traditional water heaters, tankless water heaters can be up to 34% smaller. Navien units can also be installed in more places, including crawl spaces and attics, since they are so small- about the size of a small suitcase.