A fan of about 50 watts, used for 6 hours a day, consumes:
50 watts × 6 hours = 300 Wh, or 0.3 kWh per day.
In a 30-day summer month, consumption therefore reaches approximately:
0.3 kWh × 30 = 9 kWh al mese.
Considering the average cost of electricity, the cost can be around 2-4 euros per month, depending on the rate applied by your supplier.
Do the more powerful models consume more?
Not all fans consume the same amount of power. A small tabletop model may require less energy, while a tower fan or larger model can consume as much as 70-100 watts.
Even in this case, however, the cost is generally low. A 100-watt fan running for 6 hours a day would consume about 18 kWh per month, a cost that's still much lower than the daily use of an air conditioner.
Fan or air conditioner: the difference on your bill
The main advantage of the fan is its low energy consumption. The device doesn't actually cool the air, but rather creates movement and promotes the evaporation of sweat on the skin, creating a feeling of greater freshness.
The air conditioner, on the other hand, must lower the room temperature and to do so it uses a compressor, a component that requires much more energy.
For this reason, on less muggy days, using a fan can be a more economical solution to improve comfort at home.
How to save even more by using a fan
To further reduce consumption, it is useful to choose models with efficient motors and use the lowest speeds when sufficient.
Positioning also matters: placing the fan near a window during the cooler hours can help promote air exchange, while during the day it is best to avoid using it pointed at empty rooms.
Another tip is to turn it off when you leave the room. Unlike air conditioning, fans don't maintain a stable temperature, and leaving them on unattended only wastes energy.
How much does it cost to have a fan on all night?
Even prolonged nighttime use generally doesn't represent a significant expense. A 50-watt fan running for 8 hours consumes about 0.4 kWh, costing just a few cents per day.
The real savings come when the fan allows you to reduce the use of the air conditioning, especially during periods of moderate heat.
In conclusion, keeping a fan on for six hours a day has a very limited impact on your energy bill. It's one of the most economical solutions for dealing with the summer heat, especially when used in conjunction with other measures such as blackout curtains, opening windows during cooler hours, and proper ventilation.
