NCB-240/110H – Condensing Combi-Boiler – 199,000 BTU DHW / 110,000 BTU HTG

Navien NCB-240/110H – Condensing Combi-Boiler – 199,000 BTU DHW / 110,000 BTU HTG
The Navien NCB-240/110H is a 95% AFUE condensing combi-boiler designed to deliver both space heating and domestic hot water in one high-performance, wall-mounted unit. With a maximum heating input of 110,000 BTU/hr and up to 199,000 BTU/hr for DHW, it efficiently meets the demands of larger homes or applications with simultaneous heating and hot water needs.
This combi-boiler operates on natural gas or propane and includes advanced features such as dual stainless steel heat exchangers, a smart control interface, and built-in zone pump and valve terminals. With turndown ratios of 8.5:1 for space heating and 15:1 for hot water, the NCB-240/110H adapts efficiently to fluctuating usage demands, reducing wear and energy waste.
Features:
95% AFUE high-efficiency rating
110,000 BTU/hr heating input
Up to 199,000 BTU/hr DHW input
8.5:1 turndown ratio for heating
15:1 turndown ratio for domestic hot water
Smart controls with backlit LCD and Setup Wizard
Dual stainless steel heat exchangers
Field convertible between natural gas and propane
Built-in zone pump and zone valve connections
Compact, wall-hung design with quiet operation
Supports 2″ or 3″ direct venting
Applications:
Residential space heating and hot water
Homes with simultaneous multi-fixture usage
Natural gas or propane fuel systems
Installations requiring compact, high-efficiency units
New construction or retrofit boiler replacements
Indoor wall-mounted applications with venting flexibility