What Size Combi Boiler Do I Need?
| Home Size | Radiators | Bathrooms | Recommended kW |
|---|---|---|---|
| 1-2 bed flat | Up to 10 | 1 | 24-27kW |
| 3 bed semi | 10-15 | 1 | 28-32kW |
| 4 bed detached | 15-20 | 2 | 35-40kW |
2+ bathrooms? Consider a system boiler instead
Combis struggle to supply hot water to 2 showers simultaneously. If you have 2+ bathrooms used at the same time, a system boiler with a cylinder is better.