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- The 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. Stainless steel heat exchangers provide better protection than copper against 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
- 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.
- 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.
- Connection Type3/4 inFuel TypeLiquid Propane / Natural GasHousing MaterialCold Rolled Carbon SteelIgnition TypeElectronicInput Capacity14,000 to 150,000 BTU/hrTypeHigh-Efficiency / CombiVent TypeForced Draft DirectAFUE Rating95%Boiler Weight With Water102 LbDHW Connection Size3/4 inDHW Input Capacity14,000 to 210,000 BTU/hrDHW Water Pressure15 - 150 psiDimensions17.3 in W x 12.8 in D x 29.3 in HFlow RateDHW 3.8 to 10.8 gpmManufacturerNAVIEN INCManufacturer #NCB-250/150H, RALMounting TypeWallPipe Size2 or 3 inPressure Rating12 to 30 psiSeriesNCB-H RALTemperature RatingSpace Heating: 77 - 185 degF / DHW: 86 - 140 degFVoltage Rating120 VACWater Connection Size1 in