The NFB-H series of High Capacity Condensing Fire Tube Heating Boilers provide the highest heating output while maintaining peak energy efficiency thanks to Navien's fire Tube technology. Other features include:

• Patented stainless steel fire tube heat exchanger, which reduces high stress point welds
• Advanced user interface with intuitive text display and a 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
• Cascade up to 16 boilers
• Up to 15:1 turndown ratio
• AFUE 95% - Energy Star certified
• Compact, lightweight, wall hung design saves space over traditional floor standing boilers