The Navien NCB-H Combi Boiler offers superior efficiency by combining a tankless water heater and a high-efficiency boiler into one compact unit. Designed for large homes or small commercial properties, the NCB-H delivers reliable heating and endless hot water simultaneously. With a stainless steel heat exchanger and a 15:1 turndown ratio, this combi boiler adapts to your heating demands while maintaining peak efficiency. The integrated advanced controls allow easy management of up to three heating zones, making it an excellent solution for diverse applications.

95% AFUE efficiency for lower energy costs

Compact design with built-in controls for easy installation and management

15:1 turndown ratio for optimized performance under any load