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NCB-240/110H - Condensing Combi-Boiler - 199,000 BTU DHW / 110,000 BTU HTG
NCB-240/110H - Condensing Combi-Boiler - 199,000 BTU DHW / 110,000 BTU HTG
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Navien NCB-240/110HCondensing Combi-Boiler · 199,000 BTU DHW / 110,000 BTU Heating
A 95% AFUE condensing combi-boiler designed to deliver both space heating and domestic hot water in one high-performance, wall-mounted unit — built for larger homes or applications with simultaneous heating and hot water needs.
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, adapting efficiently to fluctuating usage demands and reducing wear and energy waste.
Technical specification
| Efficiency | 95% AFUE |
|---|---|
| Heating input | 110,000 BTU/hr |
| DHW input | Up to 199,000 BTU/hr |
| Heating turndown ratio | 8.5:1 |
| DHW turndown ratio | 15:1 |
| Controls | Backlit LCD with Setup Wizard |
| Heat exchangers | Dual stainless steel |
| Fuel | Field convertible — natural gas or propane |
| Zone connections | Built-in zone pump and zone valve connections |
| Design | Compact, wall-hung, quiet operation |
| Venting | Supports 2″ or 3″ direct venting |
Applications
Residential Combi
Residential space heating and hot water.
Multi-Fixture Homes
Homes with simultaneous multi-fixture usage.
NG or LP Systems
Natural gas or propane fuel systems.
Compact Installs
Installations requiring compact, high-efficiency units.
New Construction / Retrofit
New construction or retrofit boiler replacements.
Wall-Mounted Indoor
Indoor wall-mounted applications with venting flexibility.
Key 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 for domestic hot water
- Smart controls with backlit LCD and Setup Wizard
- Dual stainless steel heat exchangers resist corrosion, improving heat recovery and life span
- 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
- Dual Venturi system for better combustion control and easy field gas conversion, with an included orifice conversion kit
Navien NCB-240/110H combi-boiler. Follow the installation manual, local gas and plumbing codes, and manufacturer instructions.
