The Navien NPE-S2 Series is a premium condensing tankless water heater built for high efficiency, installation flexibility, and long-term durability. Featuring dual stainless steel heat exchangers, up to 0.96 UEF efficiency, and a 15:1 turndown ratio, the NPE-S2 delivers reliable continuous hot water for residential and light commercial applications. Contractor-friendly features like 2" PVC venting up to 75 feet, 1/2" gas pipe capability, EZNav(TM) controls, and cascading capability help simplify installation while reducing labor and operating costs.

• 1/2" gas pipe capable up to 24'
• Dual stainless steel heat exchangers
• EZNav multi-line control panel
• Built-in HotButton control panel
• Low NOx emissions (20ppm)
• Advanced smart-system engineering designed for total residential water comfort