How the system works

The combi boiler heats water directly from the mains
British Gas boiler
British Gas boiler
House - heating system

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Combi boilers are economical to run and are able to produce an endless supply of hot water, although the flow may be limited if other taps are running at the same time. The combi boiler delivers hot water at the same speed as your cold taps.

As the combi boiler heats water instantly, direct from the mains, there is no need to wait for a storage cylinder to heat up, and you won't run out of hot water. There's also no need for cold water storage tank so it's perfect if you are limited on space. A pump will circulate hot water via the pipes to heat the radiators.

The benefits

  • Space saving solution.
  • No need for a hot water tank.
  • Heats up hot water when you need it.
  • Hot water with mains pressure.

Things to consider

  • If you have low mains water pressure in your home.
  • If you want the benefits of an airing cupboard for clothes drying or storage.
  • If you have multiple taps or showers using hot water at the same time, the flow to each will be reduced depending on how powerful your boiler is.

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