Electrical storage heaters or radiators come in a variety of different designs, with some using water, heat-retentive bricks or under-floor concrete. To run a storage heater cost-effectively you should be on an electricity rate plan that charges a lower rate at night.
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Releasing Heat - The amount of heat released during the day can be controlled either manually or automatically. In automatic models the heater senses the temperature of the room and releases heat accordingly. In water storage heaters the hot water can be run through the normal central heating radiators. Units that use bricks tend to be separate appliances.