The Navien NHW-AI Series is an indoor only non-condensing tankless water heater designed for plumbing contractors seeking reliable performance, easy installation, and consistent hot water delivery in residential and light commercial applications. Its compact, wall-hung design supports space-saving replacement and new construction installs. ComfortFlow(R) technology includes a built-in recirculation pump and buffer tank, eliminating the need for external components while reducing install time and improving hot water delivery speed and temperature stability at fixtures. NaviTech(TM) stainless steel heat exchanger and burner provide durability, corrosion resistance, and efficient heat transfer for long-term reliability. A high turndown ratio allows efficient operation across varying demand conditions, improving energy use at both low and peak flow. Intuitive controls simplify setup, diagnostics, and service, while flexible venting, low NOx emissions, and freeze protection enhance code compliance and installation versatility.

• Built-in recirculation pump & buffer tank
• NaviTech stainless steel heat exchanger and burner
• Interior unit for indoor installations
• Cascading capable
• Low NOx emissions (20ppm)
• Innovative interior non-condensing technology for a complete and efficient hybrid home