Water heating

Water heating systems in dwelling are typically:

• From central heating with hot water cylinder: the central heating provides hot water for space heating while also providing hot water via a separate storage cylinder.
• From central heating (no hot water cylinder): the central heating provides hot water for space heating and can provide hot water on demand negating the need for a storage cylinder, therefore requiring less space.
• Immersion heater: an electric element heats water in a storage cylinder, used solely for hot water (not for central heating).
• Instantaneous: hot water heated as needed by an appliance (not a boiler) fuelled by for example gas or electricity.
• Dedicated boiler: hot water supplied from a boiler only used for hot water (not central heating).

Ref English Housing Survey, Energy efficiency, 2018-19, published by the Ministry of Housing, Communities & Local Government in July 2020.

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