Navien keeps raising the bar higher and higher in fire tube boiler innovations

We totally reinvented fire tube technology from the ground up and we continue to advance our boiler technology to a higher level with the new NFB-H boiler series.

• Patented stainless steel fire tube heat exchanger—reduces high stress point welds
• Advanced user interface with intuitive text display and Quick Dial Wheel for easy navigation
• Smart controls with Setup Wizard to simplify boiler start up
• Built-in 3 zone pumps or 3 zone valves powered connections
• Optional NaviLink Wi-Fi remote control
• Common venting up to 8 boilers
• Cascading up to 16 boilers
• Up to 15:1 turndown ratio
• AFUE 95.0%—Energy Star certified
• Compact, light weight, wall hung design saves space over traditional floor standing boilers

COMPARE these advantages and see why NFB-H boilers are the right fit for small and large homes

Patented stainless steel fire tube heat exchanger with
laser weld technology

Navien’s advanced patented stainless steel heat exchanger is designed and manufactured in-house using robotic laser welding to deliver higher product quality. The ASME‑Certified, “H” Stamped, design also reduces high stress point weld failures common on other boilers.

Advanced user interface and controls

Navien’s new backlit control panel is simple and intuitive to use with its color‑coded plain text display, and an innovative click wheel that improves usability for all information input.

Built-in hardware to connect a boiler pump, 3 zone pumps or 3 zone valves

With Navien’s new PCB design you now have the ability to connect a boiler pump, 3 zone pumps or 3 zone valves, all integrated in the unit.

NFB-H Manifold Kits

Navien’s NFB-H manifold kits are ideal for hydronic space heating applications. With these manifolds, we have done the piping work for you. Both primary and secondary loop manifold kits are designed to work on all NFB-H models for fast and clean installations. All you need to add is your own appropriately sized pump.

With Navien’s cascading technology, when a unit gets up to capacity determined by the supply and return temperatures, the next unit will start to help meet the hydronic space heating requirements. This boiler sequence will continue until all units are generating the needed hydronic space heat up to the maximum cascaded capacity.

The Navien cascading system also balances out the workload of each unit for longer life. The NFB-H is dual certified for direct and non-direct venting applications.