NPN Series
Commercial building and facilities management resources for corporate facility executives, building operators and facility managers in all industry and service sectors. NPN Series articles below.
Navien Tankless Water Heaters
Navien Premium Non-condensing (NPN) tankless water heaters are offered in the NPN-Universal series (indoor or outdoor with vent cap) and NPN-Exterior series (outdoor only)for either natural gas or liquid propane.