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Home » Navien NCB-240/130H - 199,000 BTU DHW / 130,000 BTU HTG Condensing Combi-Boiler





The NCB-240/130H high-efficiency condensing combi-boiler offers several advantages, making it an attractive option for homeowners looking for efficient and versatile home heating and hot water solutions.


Here are some of the key benefits:


1. High Efficiency : As a high-efficiency condensing boiler, it operates with a higher efficiency than traditional boilers by capturing heat from exhaust gases that would otherwise be lost to the atmosphere. This efficiency can significantly reduce energy consumption and lower utility bills.

2. Combi-Boiler System : Combining both a central heating boiler and a high-efficiency water heater in one unit, it eliminates the need for a separate water heater. This not only saves space but also reduces the complexity and cost of installation and maintenance.

3. Environmentally Friendly : By operating at higher efficiency, it produces fewer greenhouse gases compared to standard efficiency boilers. This makes it a more environmentally friendly option for heating and hot water.

4. Advanced Features : Many models come with advanced features such as built-in controls for temperature management, energy usage monitoring, and even remote control through smart devices, offering convenience and further opportunities for energy savings.

5. Space Saving : Its compact design saves valuable space in the home, which is particularly beneficial in smaller properties or where space is at a premium.

6. Versatility : It is designed to work well in various property types, from small apartments to large homes, providing both heating and hot water as needed.

7. Reliability and Durability : High-quality materials and construction mean that these boilers are built to last, offering reliable service over many years with proper maintenance.

8. Government Incentives and Rebates : In some regions, purchasing high-efficiency boilers like the NCB-240/130H can qualify homeowners for government incentives or rebates, further offsetting the initial cost.

9. On-Demand Hot Water : As a combi-boiler, it provides hot water on demand without the need for a storage tank, ensuring a continuous supply of hot water and reducing energy losses associated with keeping a tank of water heated.

10. Lower Carbon Footprint : The efficiency and technology of the NCB-240/130H mean that it contributes to a lower carbon footprint for households, aligning with growing environmental concerns and regulations.

When considering a new boiler, it's important to evaluate these benefits in the context of your specific needs, including the size of your home, your energy usage patterns, and local climate conditions, to ensure that the NCB-240/130H is the right choice for you.


  • Smart controls LCD display, quick dial wheel & Setup Wizard
  • Advanced stainless steel dual heat exchangers
  • 15:1 DHW and up to 10:1 heating TDR
  • Field convertible gas system (NG/LP) up to 10,100 ft.
  • Capable of cascading up to 15 NPE water heaters
  • Capable of common venting up to 7 NPE water heaters
  • Built-in 3 zone pumps and 3 zone valves powered connections
  • 2” venting up to 65' and 3” venting up to 150'



NCB-240/130H certifications


NCB-240/130H premium features and benefits


2" PVC venting up to 65 feet including economical schedule 40 PVC.Vent Installation Detector (VID) for added safety.


Dual Venturi system creates better combustion control and turndown ratio and easy field gas conversions.

Dual stainless steel heat exchanger-c-new

Durable dual condensing stainless steel heat exchangers recover extra heat for maximum efficiency.



Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.


1/2" gas pipe capability up to 24'(subject to local codes). Cuts installation time, no need to install new gas lines for retrofit applications.


Easily accessible built-in DHW module includes integrated boiler pump, flow adjustment valve, DHW stainless steel heat exchanger, mixing valve and 3-way valve.



A leader in condensing technology


Since 2006, Navien, Inc. has become one of the fastest growing companies in the home comfort sector in North America and is now a leader in condensing technology, providing condensing tankless water heaters, combi-boilers, and boilers.* Navien's products possess state-of-the-art technology, high efficiency and reliable quality.


Navien has achieved international recognition for its sophisticated engineering and robust designs. Backed by parent company, KD Navien with more than thirty-five years of experience with advanced boiler and water heating technology, Navien will continue its mission to provide high quality products.


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