| Model | Units | Combi 25 Eco | Combi 30 Eco |
| Boiler only code |
| 5116329 | 5118139 |
| Controls |
|
|
|
| Adjustable CH temperature |
| Yes | Yes |
| User adjustable DHW temperature |
| Yes | Yes |
| Operating mode selector switch |
| Yes | Yes |
| LED operating / fault status display |
| Yes | Yes |
| Integral 24 hr electro-mechanical timer |
| Optional | Optional |
| Integral 7 day electronic timer |
| Optional | Optional |
| Wireless programmable room thermostat |
| Optional | Optional |
| Gas |
|
|
|
| Natural gas |
| Yes | Yes |
| Inlet supply pressure (Natural gas) | mbar | 20 | 20 |
| Gas rate | m3/hr | 2.76 | 3.17 |
| Heat input (maximum) | kW | 28.92 | 32.54 |
| Heat input (minimum) | kW | 8.68 | 9.77 |
| Heat output (maximum) condensing | kW | 26.95 | 30.20 |
| Heat output (minimum) condensing | kW | 8.37 | 9.42 |
| Heat output (maximum) non-condensing | kW | 25.94 | 28.63 |
| Heat output (minimum) non-condensing | kW | 7.61 | 8.56 |
| Domestic hot water flow rate (maximum) @ 35?c rise | litres/min | 10.2 | 12.3 |
| Domestic hot water flow rate (minimum) | litres/min | 2 | 2 |
| Seasonal efficiency band | SEDBUK | A | A |
| NOx | Class | 5 | 5 |
| Electrical |
|
|
|
| Electrical supply | Volts/Hz | 230 / 50 | 230 / 50 |
| Power consumption | Watts | 150 | 150 |
| External fuse rating | Amps | 3 | 3 |
| Ingress protection rating (as supplied) |
| IPX5D | IPX5D |
| Pump overrun |
| Yes | Yes |
| 24hr pump exercise |
| Yes | Yes |
| Integral frost thermostat (boiler protection only) |
| Yes | Yes |
| Weight |
|
|
|
| Installation lift weight | kg | 47.5 | 47.5 |
| Mechanical & Hydraulic |
|
|
|
| DHW system pressure (maximum) | bar | 8 | 8 |
| DHW operating pressure (minimum) | bar | 0.15 | 0.15 |
| Safety pressure discharge | bar | 3 | 3 |
| Integral automatic bypass |
| Yes | Yes |
| CH system capacity (maximum) | litres | 125 | 155 |
| Gas supply pipe size | mm | 22 | 22 |
| Flow & return pipe size (CH) | mm | 22 | 22 |
| Flow & return pipe size (DHW) | mm | 15 | 15 |
| Temporary filling loop |
| Optional | Optional |
| Compartment ventilation required |
| No | No |
| Pre-plumbing jig |
| Yes | Yes |
| Flue systems |
|
|
|
| Standard concentric flue diameter | mm |
|