NCB500 ON Combi Boiler for Installers
Our compact NCB500 ON combi boiler offers fast and flexible installation options – making it a great option for family homes that require a quick heating solution. Every Navien Combi Boiler features high-quality components to provide exceptional levels of reliability and performance.
What is ON technology?
Navien ON technology maximises the recirculation of domestic hot water whilst reducing water wastage – this means that boilers with ON technology can deliver instant and consistent hot water.
- 20% Hydrogen-ready
- Compact dimensions for easy installation in a kitchen cupboard
- 3-zone ready w/ Smart Plus control pack
- IPX4 rating provides protection from any water leaks
- Built-in digital display panel
- 10-year parts and labour warranty
- ErP A+ energy efficiency rating*
- State-of-the-art flow adjustment valve and auto mixing valve
- Smartphone compatible offering remote adjustments of heating and hot water systems
- Smart weather forecasting and Geofencing
- Durable stainless steel heat exchangers
* An A+ energy rating is achieved when installed with 3 Smart Plus room thermostats.
Technical Data
| NCB500-1S+/30k | NCB500-1S+/32k | NCB500-2S/37K | NCB500-2S/41K | ||
| Shower rating | Number of showers | One shower & one tap | One shower & one tap | Two Showers | Two Showers & one tap |
| Heat Output | Heat input range | 24.7/4.2kW | 26.8/4.6kW | 26.8/4.6kW | 26.8/4.6kW |
| Modulation (max/min) | 6:1 | 6:1 | 6:1 | 6:1 | |
| Heat output range @ 80/60°C | 24.0/4.2kW | 26.0/4.5kW | 26.0/4.5kW | 26.0/4.5kW | |
| DHW | DHW heat input range | 30.0/4.3kW | 32.0/4.6kW | 37.0/4.6kW | 41.0/4.6kW |
| DHW output range | 30.0/4.3kW | 32.0/4.6kW | 37.0/4.6kW | 41.0/4.6kW | |
| DHW flow rate @ 25°C temp. rise. | 17.2 l/min | 18.4 l/min | 21.3 l/min | 23.6l/min | |
| DHW flow rate @ 35°C temp. rise. | 12.3 I/min | 13.1l/min | 15.2l/min | 16.8l/min | |
| DHW flow rate for kitchen @ 45°C temp. rise. | 9.6 l/min | 10.2l/min | 11.8l/min | 13.1l/min | |
| Modulation | TDR | 7:1 | 7:1 | 8:1 | 9:1 |
| Flue | Flue Size | Coaxial length Ø 60/100 | |||
| Max. horizontal coaxial length Ø60/100 | 8m | ||||
| Max. vertical coaxial length Ø60/100 | 8m | ||||
| Weight | Lift weight | 31kg | 34kg | 34kg | 34kg |
| Dimensions | Width x Depth x Height | 395 x 285 x 680mm | |||
| ErP Efficiency | ErP A (93%) | ||||
| ErP Efficiency with Smart Plus (x3) | ErP A+ (98%) | ||||
| NOx Classification | Class 6 | ||||
