The Navien NFC-H condensing fire tube combi-boiler delivers high-efficiency space heating and on-demand domestic hot water in a single wall-hung unit. With up to 95% AFUE efficiency, 15:1 turndown ratio, and DHW output up to 210,000 BTU/h, it supports simultaneous multi-fixture use and stable system performance. Key features include a patented stainless steel fire tube heat exchanger, built-in zone controls, flexible venting options, and advanced setup controls, making it a powerful, space-saving combi-boiler solution for modern hydronic systems.

• DHW 15:1 TDR and heating 15:1 TDR
• 2" venting up to 65', 3" venting up to 150'
• Advanced controls with intuitive user interface and Setup Wizard
• NEW DHW module with mixing and water adjustment valves
• Built-in powered connections for 3 zone valves or 3 zone pumps
• Smart fire tube technology designed for complete home comfort and system scalability