![Navien tankless water heater](/ext/resources/PM/2014/September/products/PM0914_Products_tankless-wh_Navien-ComfortFlow_300.jpg)
Additional NPE standard features include: dual stainless-steel heat exchangers; 1/2” gas lines up to 24’; and 2” PVC venting up to 60’. These technical advances make the NPE-A series ideal for commercial and residential tank water heater replacement, as well as new construction.