Last edited 12 Dec 2018


A boiler is a piece of technical apparatus in which fuels are oxidised to generate thermal energy, which is transferred to water or steam. Boilers are typically used to heat water to feed heating systems or to supply hot water, or both. Boilers are most commonly fuelled by:

There are a very wide range of boilers available depending on; size, fuel type, efficiency and application, and ranging from compact units used for domestic heating, to very large boilers used for industrial processes. For more information, see:

An automatic feed boiler is a boiler with fully automated fuel supply.