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What type of boiler do i have?

To help make sure you choose the right cover for your boiler, we have provided descriptions of the various types.

Conventional boiler  - boilers fitted before 1 April 2005

Conventional boilers typically include the boiler, extended controls, a feed and expansion cistern. They heat the hot water which it stores in a hot water cylinder. If you have this type of boiler in your home, it is usually found in the airing cupboard. Conventional boilers are often fed by a cold water storage tank, commonly located in the loft. The boiler is controlled by a timer/ programmer to work at pre-set times, although there will also be a manual override button to turn the boiler on when the hot water cylinder needs more hot water in between these pre-set times (often called an emersion heater.)

Condensing conventional boiler - boilers fitted after 1 April 2005

Since 1 April 2005, by law, all new conventional boilers must be condensing boilers.

This is the newest type of boiler that uses the heat trapped in the condensation, which used to go out of the flue as steam vapour. By condensing this hot moisture, the hot condensed liquid is used to help heat the water passing through the boiler. This makes the boiler more energy efficient.

Condensing conventional boilers typically include a boiler, extended controls, a feed and expansion cistern, they heat the hot water which is stored in a hot water cylinder. It is often fed by a cold water storage tank located in the loft. The boiler is controlled by a timer/ programmer to work at pre-set times, although there will also be a manual override button to turn it on when the hot water cylinder needs more hot water in between the pre-set times (often called the emersion heater).

Combi or combination boiler

This is the most popular type of boiler in the UK, it provides heat and hot water without the need for water tanks or cylinders. Heated water goes straight from the boiler to the tap.

Since 1 April 2005, by law, all new combination boilers must also be condensing boilers, and may be called a combination condensing boiler. The term combination means it is the type of boiler that comes on when you turn on the tap (or your timer turns on the central heating), and condensing means it uses the condensation trapped in the exhaust to help heat the water.

Combined cooker/ boiler

These appliances serve as both a heat source and/or heat water. Combined cooker/ boilers are also used as a cooking appliance, for example a twin burner, Range Cooker, Rayburn or Aga.