Combi: This type of boiler removes the need for any stored water, and heats the water instantaneously when you turn the tap on, these boilers are the most popular in the UK today and account for over 80% of installations.

System Boiler: Typically this type of boiler would be used for larger properties or new systems, and removes the need for the small heating tank to be installed.

Regular Boiler: Normally used for a like for like replacement of a traditional or conventional boiler, using stored hot water in an airing cupboard.