On the hottest summer days, many people turn to the fan to help them sleep. But have you ever wondered how much it really costs to leave it on all night? The good news is that, compared to air conditioning, the fan is one of the most economical ways to stay cool. Still, it’s helpful to know how much its use represents on your electric bill.
⚙️ How much energy does a fan consume?
Consumption depends on the type of fan:
| Fan type | Average power | Hourly consumption | Consumption in 8h | Cost per night | Monthly cost (30 nights) |
|---|---|---|---|---|---|
| Table fan | 30 W | 0.03 kWh | 0.24 kWh | 0,05 € | 1,44 € |
| Tower fan | 50 W | 0.05 kWh | 0.40 kWh | 0,08 € | 2,40 € |
| Powerful floor fan | 75 W | 0.075 kWh | 0.60 kWh | 0,12 € | 3,60 € |
| Ceiling fan | 40 W | 0.04 kWh | 0.32 kWh | 0,06 € | 1,92 € |
💡 Calculations based on an average electricity price in Spain of €0.20/kWh (PVPC regulated tariff, 2025).
❄️ What if we compare it to air conditioning?
A standard air conditioner can consume between 1 and 2.5 kWh per hour, which translates into up to 10 times the cost of a fan. For example, leaving the air on for 8 hours can cost between €1.60 and €4 per night, compared to €0.12 for a fan.
❄️ Quick comparison: fan vs. air conditioners
| Device | Cost per night (8h) | Monthly cost (30 nights) |
|---|---|---|
| Fan (standing) | 0,12 € | 3,60 € |
| Air conditioning | 1,60-4 € | 48-120 € |
🛠️ Tips to save more
- Use fans on a timer to turn off automatically in the early morning.
- Place the fan near an open window to improve fresh air circulation.
- Clean the blades regularly: dust reduces efficiency.
- Avoid leaving unnecessary lights or appliances on while you sleep.
✅ Conclusion.
Having the fan on all night is very economical: it costs between 2 and 4 € per month, depending on the type and electricity tariff. It is a much cheaper alternative to air conditioning and can be sufficient to maintain a comfortable temperature during sleep. So, if this summer the heat is on, you can sleep with the fan on without worrying about the bill.
