A combination or combi boiler is both a high efficiency water heater and a central heating boiler in a single compact unit.
Combi boilers heat water directly from the mains when you turn on a tap, so you won't need a hot water storage cylinder or a cold water storage tank in the roof space. They are also very cost-effective and energy-efficient as water is heated instantly rather thank being heated and then stored in a cylinder.
An added benefit is that hot water is delivered at mains pressure, which means that you could get a powerful shower without the need for a separate pump.
Advantages
- Compact sizes make combi boilers perfect for smaller properties.
- Ideal where there is a little or no loft space.
- No need for a hot water cylinder allows increased living space.
- No cold water storage tank frees up a loft for conversion.
- No risk of loft pipework freezing.
- Less pipework in the home makes installation typically cheaper