A combi boiler, or combination boiler, is a compact unit that heats both your water and your central heating. In the UK the combi boiler is the most popular choice for gas central heating and domestic hot water needs.
How does a combi boiler work?
In many cases boilers store heated water in a tank that is located on the property, the combi boiler however heats water on demand.
When you turn on a hot tap in your home the water feeds through a network of pipes that lead back to the boiler. Once the boiler has detected that you’ve turned on the tap it fires up and heats the water.
Whilst the hot water is turned on the combi boiler will often pause the central heating system, that’s why you can sometimes hear the system switching on or off when a tap it turned on.
The water that is heated is taken directly from the mains supply meaning that hot water is delivered at mains pressure. Because it is heated on demand it is also a cost effective and efficient way to heat your water.
Why choose a combi boiler?
As they do not require a hot water storage cylinder or cold-water storage tank they take up little space and are ideal for smaller homes.
They also benefit from being cost-effective and energy-efficient as they heat water directly from the mains rather than storing it, this also means hot water is delivered at mains pressure providing you with a strong flow so you can enjoy a powerful shower.
There is no need for a cold water tank either, which eliminates the risk of pipework in the loft freezing, it also means less space is needed if you have little or no loft space, or are looking to convert the loft.
Combi boiler installation
We have a wide range of combi boilers to suit the needs of your central heating system. Our qualified Gas Safe registered engineers can fit your boiler to the highest standard and provide you with the relevant paperwork to prove your boiler meets building regulation requirements.
Because combi boilers do not require storage tanks they use less pipework in the home, which often means installation of a combi boiler is typically cheaper.