How much does an electric heater consume? Complete guide to consumption and savings
With winter just around the corner, many households turn to electric heating to keep warm. However, a common question arises: how much does an electric heater consume? In this article, we explain how to calculate its consumption, what factors influence your bill, and how to save on heating without sacrificing comfort.
How much does an electric heater cost per month?
The energy consumption of an electric heater depends on its power and how long it is switched on.
Basic formula:
Consumption (kWh) = Heater power (kW) × Hours of use
Practical example:
- 1,500 W (1.5 kW) heater used 5 hours per day → 1.5 × 5 = 7.5 kWh per day.
- With an electricity price of €0.20/kWh → 7.5 × 0.20 = €1.50 per day.
- In one month (30 days) → 1.50 × 30 = approximately €45 per month.
Differences in consumption depending on the type of electric heater
Not all electric heaters consume the same amount of energy. Knowing the type of heater will help you better calculate your expenses:
- Convection heater: Heats up quickly but if used for many hours, consumption increases.
- Oil heater: Retains heat even after being switched off, reducing the time it needs to be switched on.
- Halogen or ceramic heater: Moderate consumption, ideal for occasional heating in small rooms.
Factors affecting consumption
- Heater power: higher power = higher consumption.
- Daily usage time: the more hours it is switched on, the more it consumes.
- Room insulation: poorly insulated rooms require more energy.
- Electricity rates: using heating during off-peak hours reduces costs.
- Thermostat and temperature control: automatic regulators optimise consumption.
Tips for reducing the cost of an electric heater
✅ Tips for reducing the cost of an electric heater
✅ Only use heating in occupied rooms.
✅ Take advantage of the residual heat from oil stoves.
✅ Keep windows and doors closed.
✅ Choose models with a thermostat and timer to optimise consumption.
Approximate consumption table for electric heaters
| Type of heater | Power (W) | Hours of use/day | Monthly consumption (kWh) | Monthly cost (€) |
|---|---|---|---|---|
| Convection heater | 1.500 W | 5 h | 225 kWh | 45 € |
| Oil stove | 2.000 W | 4 h | 240 kWh | 48 € |
| Ceramic/halogen stove | 1.200 W | 3 h | 108 kWh | 21,60 € |
📌 Prices calculated using an average rate of €0.20/kWh.
¿Cuánto gasta un calefactor eléctrico?: Conclusión
The cost of an electric heater depends on the type of heater, its power and hours of use. Oil heaters are more efficient in the long term, while ceramic or halogen heaters are useful for occasional heating and consume less energy.
At Evergreen Eléctrica, we help you optimise your electricity consumption and reduce your bill:
- 100% renewable electricity.
- Clear and competitive rates.
- Personalised advice and energy audits.
📩 Solicita hoy tu consulta gratuita y aprende a usar tu calefacción eléctrica de manera eficiente sin aumentar la factura.
