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

Aim high with Navien...

High efficiency, High output, High performance, all in one compact combi

• Highest DHW maximum BTU’s in residential combi-boilers...up to 210,000 per hour
• Highest DHW flow rate @ 70°F rise...up to 5.4 GPM
• Highest number of BTU sizes for the North American residential combi-boiler market
• Highest residential combi DHW TDR...15:1 for all models
• Highest residential combi heating TDR... up to 11:1
• Highest number of built-in zone controls for valves or pumps... up to three
• Highest full lineup 2" PVC venting lengths... up to 65 feet
• Highest number of cascade capable units with NPE tankless water heaters... up to 15
• High altitude certification... up to 10,100 feet (NG or LP)
• Lowest minimum fire BTU for residential combi-boilers... as low as 10,700

New Navien NCB-H...the complete combi package and no comprimises

Navien's innovation and technological advancements have done it again. The new NCB-H is taking combi performance to the highest levels. As the competition tries to get closer, Navien ingenuity keeps advancing their lead.

COMPARE these advantages and see why NCB-H combis are the right fit for small and large homes

Built-in DHW module now with
higher performance
Navien’s NCB-H generates enough hot water to run up to 3 showers and a dishwasher at the same time.

Expanded DHW Capability

For increased domestic hot water flow demand, the NCB-H can be cascaded and common vented with up to 15 NPE tankless water heaters

ZNS