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-H combi-boilers. Our new NHB-H boiler series is the next in a long line of innovations from Navien. All boilers have Navien’s advanced burner system, an industry-leading AFUE of 95% and turndown ratios up to 15:1.
Now available in four sizes NHB-55H, NHB-80H, NHB-110H and NHB-150H.
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The industry’s largest turndown ratio in the NHB-150H minimizes short cycling and provides better reaction to changing heating demands throughout the year.
With Navien’s new PCB design you now have the ability to connect and control a boiler pump, 3 zone pumps or 3 zone valves, all integrated in the unit.
Navien’s new backlit control panel is simple and intuitive to use with its color‑coded plain text display, and an innovative click wheel for easy navigation through setup, operation, diagnostics, and more.
Learn more about the design and capabilities of our new NHB-H series in this video:
This system-matched stainless steel manifold kit is just another high-quality accessory to help make your installation faster and easier. The kit includes the space heating supply isolation valves, space heating return isolation valves, PRV/air vent/LWCO adapter tree, threaded connection adapter with clip and LWCO plug.
NHB-H primary manifold kit
With our cascading technologies, the number of units operating is determined by system demand to meet hydronic space heating requirements. As demand increases additional units are enabled to meet higher heating requirements. Conversely, as system demands decreases, the number of operating units decreases until the heating requirement is met.
The Navien cascading system also balances out the workload of each unit for a longer service life. The NHB-H is also certified for common venting, reducing the venting and number of terminations required.