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.
Storage Heater Running Costs
| Power Rating | Per Hour | Per Day* | Per Week |
|---|---|---|---|
| 400W | 7.11p 400W |
£0.50 2.8kWh |
£3.48 19.6kWh |
| 800W | 14.22p 800W |
£1.00 5.6kWh |
£6.97 39.2kWh |
| 1100W (1.1kW) | 19.56p 1100W |
£1.37 7.7kWh |
£9.58 53.9kWh |
| 1400W (1.4kW) | 24.89p 1400W |
£1.74 9.8kWh |
£12.20 68.6kWh |
| 1700W (1.7kW) | 30.23p 1700W |
£2.12 11.9kWh |
£14.81 83.3kWh |
| 2500W (2.5kW) | 44.45p 2500W |
£3.11 17.5kWh |
£21.78 122.5kWh |
| 3400W (3.4kW) | 60.45p 3400W |
£4.23 23.8kWh |
£29.62 166.6kWh |
*based on 7 hrs a day at maximum input using the Average rate of 17.78p/kWh (December 2018 tariff) for a unit of electricity. Heaters with a thermostat will automatically turn off when required room temperature is reached.
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