NCB-240/130H - Condensing Combi-Boiler - 199,000 BTU DHW / 130,000 BTU HTG
Navien NCB-240/130H - Condensing Combi-Boiler - 199,000 BTU DHW / 130,000 BTU HTG
The Navien NCB-240/130H is a high-efficiency, 95% AFUE condensing combi-boiler that delivers both space heating and domestic hot water in a single wall-hung unit. Designed for performance and convenience, it features a maximum heating input of 130,000 BTU/hr and a DHW input of up to 199,000 BTU/hr. The unit supports both natural gas and propane, with field conversion included, and offers flexible venting options using 2" or 3" PVC, CPVC, polypropylene, or stainless steel.
The NCB-240/130H includes dual stainless steel heat exchangers, integrated smart controls with an LCD display, and built-in support for three heating zones. With advanced turndown ratios and Energy Star certification, it's engineered to optimize energy use while maintaining consistent comfort in residential heating applications.
Features:
- 95% AFUE efficiency rating
- 130,000 BTU/hr heating input
- 199,000 BTU/hr DHW input
- Dual stainless steel heat exchangers
- 10:1 heating turndown ratio
- 15:1 domestic hot water turndown ratio
- Smart controls with LCD display and setup wizard
- Integrated 3-zone controller for zone valves or circulators
- Field convertible from natural gas to propane (kit included)
- Compact wall-hung design
- Energy Star certified
- Built-in freeze protection and advanced safety controls
- Supports cascading with up to 15 NPE units
Applications:
- Whole-home heating and on-demand hot water
- Residential homes using natural gas or propane
- Indoor wall-mounted installations
- Projects requiring high-efficiency boiler systems
- Smart home setups using Navien controls
- Systems needing multi-zone heating integration
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
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Durable stainless steel heat exchangers resist corrosion, resulting in longer life and improved heat recovery from flue gases for superior efficiency. |
Separate stainless steel flat plate heat exchanger for DHW creates the lightest flow rates for any combi-boiler in the industry. |
Dual Venturi system creates better combustion control and turndown ratio. Orifice conversion kit for easy field gas convertibility from NG to LP is included with every NCB-H Series combi-boiler. |
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All components of DHW module including water feed valve, flow adjustment valve, mixing valve and 3-way valve are right behind circuit board for easy serviceability. |
Installations in or near media rooms, recreation rooms or any living areas of the house are possible with the quiet running NCB-H combi-boilers. |
The sophisticated gas flow control system provides a high turndown ratio, reducing energy waste and excessive boiler cycling and enhances temperature control for DHW. |
Dual Stainless SteelHeat ExchangerDesigned for exceptionalheating performance and longevityHeating up to150,000BTUs per hour |
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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

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