Navien has entered the non-condensing market with its new Navien Premium Non-Condensing (NPN) tankless water heaters. The units will be offered in two series: the NPN-U (universal) for both interior and exterior operation and the NPN-E for exteriors only. Both will be available in 160,000 Btu/h, 180,000 Btu/h, and 199,900 Btu/h models for use with either natural gas or liquid propane. These models incorporate NaviTech technology, which includes a stainless steel heat exchanger and a stainless steel burner with “lean/rich stable cleaner burning technology.” Contact a local distributor for pricing.