Navien Tankless Water Heater. As the leader in condensing technology, Navien has already reinvented the water heating industry with the award-winning NPE tankless water heaters and the NCB combi-boilers.

• Max Input : 150,000 BTU/H

• Indoor/Outdoor Installation

• Residential/Commercial

• ½” gas pipe capable up to 24’

• Field convertible gas system

• Ultra condensing efficiency

• Dual stainless steel heat exchangers

• Low NOx emissions (≤ 20ppm)

• SCH 40, 2” venting up to 60’

• Cascading capable