Condensing Boiler Navien NFB Series Capacity 175,000 BTU

Totally reinventing fire tube technology from the ground up

• Patented stainless steel heat exchanger — eliminates high-stress point welds.
• Advanced user interface and controls with intuitive text display, simplifies boiler setup.
• Built-in hardware to connect a boiler system pump, 3 zone pumps, or 3 zone valves.
• Optional NaviLink Wi-Fi remote control.
• Cascading and common venting capable.
• 10:1 Turn Down Ratio.
• AFUE 95.0% — Energy Star 2018 most efficient rating.

Patented compact stainless steel fire tube heat exchanger

Navien’s advanced patented stainless steel heat exchanger design is ASME‑Certified, “H” Stamped, and reduces high-stress point weld failures common on other boilers. This compact, in‑house designed, and manufactured heat exchanger uses the latest automated laser welding technology to deliver superior product quality.

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 into the unit.