The Navien NCB-240/110H replaced an outdated boiler system, and the improvement has been substantial from the start.
Having heating and hot water combined into one compact unit has made maintenance easier and freed up valuable space. The system keeps temperatures stable, provides plenty of hot water, and runs very quietly.
The quality of the equipment is impressive, and after going through a full winter season, it has performed exactly as expected. It has been a dependable system for our family, and we are glad we made the switch.
(0 reply)
Karen MitchellDecember 2, 2025
We purchased the Navien NCB-240/110H after deciding to completely modernize the heating system in our older home. The biggest challenge was finding one unit that could provide reliable heating while also meeting our family’s hot water needs.
This boiler has been a great solution. Before the upgrade, we had separate equipment that took up a lot of room and required more maintenance. The Navien combi boiler simplified everything by combining heating and hot water into one compact system.
The house warms up more evenly, and hot water performance has been excellent, even when multiple fixtures are in use. We also appreciate how quiet the system is compared to our previous setup.
The stainless steel heat exchangers and high-efficiency condensing design were important factors in our decision because we wanted something reliable that would last for many years. The compact design also gave our utility area a much cleaner appearance.
After using it through the colder months, we are very satisfied with the results. It has made our home more comfortable, reduced the complexity of our heating system, and feels like a smart long-term investment.
(0 reply)
William BennettOctober 11, 2025
The Navien NCB-240/110H was exactly what we needed for our home renovation project. We wanted to replace our old heating setup with something more modern that could handle both space heating and domestic hot water without installing multiple separate units.
This combi boiler has worked extremely well for us. The heating response is quick, the hot water supply is reliable, and the entire system takes up much less space than our previous equipment. The wall-installed design was a huge advantage because it allowed us to make better use of our boiler room.
The operation is quiet, the controls are easy to understand, and the overall build quality feels excellent. Very happy with the performance so far.
NHB integrated control provides industry-leading options and features including adjustable heat capacity, temp boost for outdoor reset control, adjustable anti-cycle timer and freeze protection.
The condensing technology of the dual stainless steel heat exchangers saves energy, reduces greenhouse gasses.
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.
The sophisticated gas flow control system provides a high turndown ratio which reduces energy waste and excessive boiler cycling.
NHB integrated control provides industry-leading options and features including adjustable heat capacity, temp boost for outdoor reset control, adjustable anti-cycle timer and freeze protection
The condensing technology of the dual stainless steel heat exchangers saves energy, reduces greenhouse gasses
2″ venting up to 65′; 3” up to 150’ (including schedule 40 PVC)
The sophisticated gas flow control system provides a high turndown ratio which reduces energy waste and excessive boiler cycling
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Low gas pressure operation. Negative pressure regulating gas valveensures maximum performance all the way down to 3.5″ of water column on natural gas and 8″ of water column on propane gas.
Dual Venturi system creates better combustion control, turndown ratio and easy field gas conversions.
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.
Patented stainless steel fire tube heat exchanger Navien’s innovative heat exchanger design is ASME‑Certified,“H” Stamped, and reduces high-stress point weld failures common on other combi-boilers.
Navien NFC-250/200H Boiler
Boiler Navien NCB-240/110H Reviews
- Eric Wallace February 20, 2026
(0 reply) - Karen Mitchell December 2, 2025
(0 reply) - William Bennett October 11, 2025
(0 reply)
4 of 3 ReviewsThe Navien NCB-240/110H replaced an outdated boiler system, and the improvement has been substantial from the start. Having heating and hot water combined into one compact unit has made maintenance easier and freed up valuable space. The system keeps temperatures stable, provides plenty of hot water, and runs very quietly. The quality of the equipment is impressive, and after going through a full winter season, it has performed exactly as expected. It has been a dependable system for our family, and we are glad we made the switch.
We purchased the Navien NCB-240/110H after deciding to completely modernize the heating system in our older home. The biggest challenge was finding one unit that could provide reliable heating while also meeting our family’s hot water needs. This boiler has been a great solution. Before the upgrade, we had separate equipment that took up a lot of room and required more maintenance. The Navien combi boiler simplified everything by combining heating and hot water into one compact system. The house warms up more evenly, and hot water performance has been excellent, even when multiple fixtures are in use. We also appreciate how quiet the system is compared to our previous setup. The stainless steel heat exchangers and high-efficiency condensing design were important factors in our decision because we wanted something reliable that would last for many years. The compact design also gave our utility area a much cleaner appearance. After using it through the colder months, we are very satisfied with the results. It has made our home more comfortable, reduced the complexity of our heating system, and feels like a smart long-term investment.
The Navien NCB-240/110H was exactly what we needed for our home renovation project. We wanted to replace our old heating setup with something more modern that could handle both space heating and domestic hot water without installing multiple separate units. This combi boiler has worked extremely well for us. The heating response is quick, the hot water supply is reliable, and the entire system takes up much less space than our previous equipment. The wall-installed design was a huge advantage because it allowed us to make better use of our boiler room. The operation is quiet, the controls are easy to understand, and the overall build quality feels excellent. Very happy with the performance so far.