A boiler supplying hot water or heating that is built in behind a fireplace or is an integral part of a gas fire.
- An integral back boiler provides domestic hot water and heats the radiators, which then provide central heating.
- Boilers can also be divided into floor-standing, wall-hung and back boilers.
- She bought it in 2000 for about £235,000, when it was still heated by a back boiler and scarcely inhabitable by today's standards.
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