The Navien NPE-A2 is the premium tier of Navien's condensing tankless lineup, featuring the patented ComfortFlow system with a built-in buffer tank and recirculation pump. This solves the cold water sandwich problem that plagues standard tankless units, delivering near-instant hot water at the tap with minimal wait time and zero water waste. Available in 150,000 to 199,000 BTU capacities with a .95 UEF rating, the NPE-A2 shares the same dual stainless steel heat exchanger platform as the S2 but adds the comfort and convenience of recirculation without needing a separate external pump or plumbing loop.

ComfortFlow Built-In Recirculation: Integrated buffer tank and recirculation pump eliminate the cold water sandwich effect and deliver hot water faster to fixtures without external pumps or additional plumbing.

Dual Stainless Steel Heat Exchangers: Same corrosion-resistant platform as the NPE-S2 for a service life up to 20 years, even in areas with hard or mineral-heavy water.

Ready-Link Cascading: Connect up to 32 units with automatic load balancing. When one unit reaches 80% capacity, the next activates to meet demand, ideal for larger homes or light commercial applications.