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Night Storage Heaters Electricity Cost Calculator

Night storage heaters use electricity supplied at cheaper off-peak night time tariffs (Economy 7 and Economy 10). Storage heaters radiate heat stored during the night slowly releasing this heat the following day.

Storage heaters are rated in Watts (W) or Kilowatts (kW). Check what your heaters are rated at, then use our energy calculator to see how much each heater should cost to run per hour, day or week.

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Storage Heater Running Costs

Select tariff: Or:
Power Rating Per Hour Per Day* Per Week
400W 6.15p
400W
£0.43
2.8kWh
£3.01
19.6kWh
800W 12.30p
800W
£0.86
5.6kWh
£6.03
39.2kWh
1100W (1.1kW) 16.91p
1100W
£1.18
7.7kWh
£8.28
53.9kWh
1400W (1.4kW) 21.52p
1400W
£1.51
9.8kWh
£10.54
68.6kWh
1700W (1.7kW) 26.13p
1700W
£1.83
11.9kWh
£12.80
83.3kWh
2500W (2.5kW) 38.42p
2500W
£2.69
17.5kWh
£18.83
122.5kWh
3400W (3.4kW) 52.26p
3400W
£3.66
23.8kWh
£25.61
166.6kWh

*based on 7 hrs a day at maximum input using the Average rate of 15.37p/kWh (September 2016 tariff) for a unit of electricity. Heaters with a thermostat will automatically turn off when required room temperature is reached.

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