Description
Optimized for ultimate combi-boiler DHW performance
NCB-H offers industry leading DHW features including the highest maximum BTU/h for DHW (210,000), highest flow rate of 5.4 GPM at 70° rise and a DHW turndown ratio of 15:1.
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 compromises
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.
Dual stainless steel heat exchangers for heating
Durable stainless steel heat exchangers resist corrosion, resulting in longer life and improved heat recovery from flue gases for superior efficiency.
Up to 5.4 GPM @ 70°F temperature rise for DHW
Separate stainless steel flat plate heat exchanger for DHW creates the lightest flow rates for any combi-boiler in the industry.
Dual Venturi and field gas convertibility
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.
Easy access to DHW module
and valves
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.
Low noise levels
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.
TDR 15:1 for DHW and up to 11:1 for heating
The sophisticated gas flow control system provides a high turndown ratio, reducing energy waste and excessive boiler cycling and enhances temperature control for DHW.
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.
Optional recirculation valve for NCB-H combi-boilers
NaviCirc is a simple plumbing device that uses existing hot and cold water lines to reduce the wait time for hot water at the faucet without the need for dedicated recirculation return line.
Part No. PFFW-001, NaviCirc Kit: 30022965A. External recirc pump and check valves not included.
