Description
Navien NCB-250/150HCondensing Combi-Boiler · 250,000 BTU DHW / 210,000 BTU Heating
A 95% AFUE condensing combi-boiler that combines powerful space heating and on-demand domestic hot water in a single wall-hung unit, delivering efficient performance for larger residential applications.
Field convertible from natural gas to propane and supports a range of venting materials including PVC, CPVC, polypropylene, and stainless steel. It also features compatibility with Navien’s NaviLink smart home controller for remote access and monitoring.
Technical specification
| Efficiency | 95% AFUE, ENERGY STAR certified |
|---|---|
| Heating input | 150,000 BTU/hr |
| Net AHRI rating | 120,000 BTU/hr |
| DHW input | Up to 250,000 BTU/hr |
| Heating turndown ratio | 11.1:1 |
| DHW turndown ratio | 15:1 |
| Fuel | Field convertible — natural gas or propane |
| Controls | Smart controls, NaviLink compatible |
| Design | Compact wall-mounted |
| Venting | 2″ or 3″, PVC, CPVC, polypropylene or stainless steel |
Applications
Whole-Home Comfort
Whole-home space heating and domestic hot water.
Medium to Large Homes
Suited for medium to large residential homes.
Flexible Venting
Indoor installations with venting flexibility.
NG or LP Systems
Natural gas or propane fuel systems.
Retrofit & New Construction
Retrofits and new construction projects.
Smart Home Ready
Smart home integration with NaviLink controller.
Key features
- 95% AFUE high-efficiency rating
- 150,000 BTU/hr heating input, 120,000 BTU/hr net AHRI rating
- 11.1:1 turndown ratio for space heating, 15:1 for domestic hot water
- Field convertible between natural gas and propane
- Smart controls with NaviLink compatibility for remote access and monitoring
- Dual stainless steel heat exchangers resist corrosion, improving heat recovery and life span
- Separate stainless steel flat plate heat exchanger for DHW delivers the industry’s lightest flow rates
- Dual Venturi system with included orifice conversion kit for easy field gas convertibility
- Quiet running for installation in or near media rooms, recreation rooms or any living area
- Compatible with 2″ or 3″ venting in PVC, CPVC, polypropylene or stainless steel
Navien NCB-250/150H combi-boiler. Follow the installation manual, local gas and plumbing codes, and manufacturer instructions.
