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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 and only non-condensing outdoor gas tankless water heater to offer a stainless steel heat exchanger which provides very low NOx comparable to our NPE series.
NPN-E control panel
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
Approved for mobile & manufactured homes. NPN-E outdoor gas tankless water heaters are ideal for eco-friendly houses of all sizes.
Space-saving design. Sleek wall-hung units need less room and are substantially lighter than traditional tank water heaters.
Low noise levels. Install near a deck, outdoor kitchen or other outdoor living space — the quiet-running NPN-E units won't disturb your enjoyment.
Easy retrofit installation. Pin-to-pin design matches configuration of other tankless models for a simpler swap.
Manufacturing integrity. Navien engineers and produces 90% of the components used in our NPN-E series units.
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.
No, you cannot install an outdoor unit in a garage. Only outdoor units can 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.