Overview
The new Navien NPN is offered in two series, the NPN-Universal (indoor or outdoor with vent cap) and NPN-Exterior (outdoor only)
The NPN series is the first and only non-condensing tankless series to offer NaviTech™ technology that includes a stainless-steel heat exchanger and an advanced stainless-steel burner with the same very low NOx levels as the NPE. Both the NPN-U and NPN-E include an integrated control panel, built-in water adjustment valve, built-in air pressure sensor, built-in recirculation control, and a pin-to-pin matching configuration for easy retrofit installation