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Navien NCB is the first high efficiency tankless condensing combination boiler with the capacity to supply both heat and domestic hot water for larger homes - enough hydronic heat for a whole house, plus hot water to run 2 showers and a dishwasher all at the same time. The Navien NCB saves installation time and reduces call backs. In addition, the NCB takes up 80% less space than a traditional floor standing boiler and tank water heater.
KD Navien® Gas Fired Water Boiler, Series: NCB, 120 VAC, 200 W, 60 Hz, 95 % AFUE, 18000 - 120000 Btu/hr Space, 18000 - 199900 Btu/hr Domestic Hot Water BTU, 4.5 gal/min, 12 - 30 lb/sq-in/15 - 150 lb/sq-in (Hydronic/DHW) Water, 3-1/2 - 10-1/2 in WC Natural Gas Supply Pressure, 1 in NPT Supply/Return, 3/4 in NPT Gas Connection, Natural Gas Fuel, Forced Draft Direct Vent, 2 in Chimney/Breeching/Vent Size, Electronic Ignition, 97 MBH Net BTU Rating, Wall Hung Mounting, Cold Rolled Carbon Steel, 17 in W x 28 in H x 12 in D
| AFUE Rating | : | 95 % |
| BTU Rating | : | 18000 - 120000 Btu/hr Space, 18000 - 199900 Btu/hr Domestic Hot Water |
| Chimney/Breeching/Vent Size | : | 2 in |
| Connection Type | : | 1 in NPT Supply/Return, 3/4 in NPT Gas |
| Dimensions | : | 17 in W x 28 in H x 12 in D |
| Flow Rate | : | 4.5 gal/min |
| Frequency Rating | : | 60 Hz |
| Fuel Type | : | Natural Gas |
| Ignition Type | : | Electronic |
| Material | : | Cold Rolled Carbon Steel |
| Mounting Type | : | Wall Hung |
| Net BTU Rating | : | 97 MBH |
| Power Rating | : | 200 W |
| Pressure Rating | : | 12 - 30 lb/sq-in/15 - 150 lb/sq-in (Hydronic/DHW) Water, 3-1/2 - 10-1/2 in WC Natural Gas Supply |
| Vent Type | : | Forced Draft Direct |
| Voltage Rating | : | 120 VAC |
- Navien's condensing technology offers the high efficiency
- Money and energy savings over tank type water heaters and traditional water heaters
- Provides longer life expectancy as they are highly-resistant to corrosion and erosion compared to copper heat exchangers
- Reduces minerals deposits
- New metal fiber burner is designed to deliver a consistent air/gas mixture improving combustion efficiency
- Result in less acid rain and less green house effect
- The negative pressure gas valve and fan with dual venturi operation allows for better adaptability to low gas pressure applications
- NCB models allow for easy convertibility from NG to LP
- Heats water when needed, making it environmentally sound as well as cost efficient
- Offers silent heating because no blowers are needed for forced circulation
- Radiant heat in the floors can transmit warmonths throughout the house hrs after turning off the heater
- Automatically fills water into space heating pipes when the unit senses a water shortage
- The Combi's built-in control system is designed to keep the unit's plumbing frost free in winter conditions
- Stainless steel heat exchanger
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