While France is going through a new unprecedented heat wave, the fan stands out as the essential ally of summer nights, much less energy -consuming than an air conditioner. But how much does it really cost to use this type of device when it runs all night?
The fan… at what price?
To assess the cost of a fan, you need two data: the fan power, and the price per kilowatt hour, estimated at € 0.2016 including tax in France in June 2025. For a 50 W model used for 12 hours, you can estimate the final cost at 0.6 kWh (50 W x 12 h = 600 WH), or about 12 cents per night. For a more powerful model, the price can quadruple, until reaching the 50 cents per night. Over two summer months, the bill climbs to almost € 30 for a single fan. It will then be necessary to multiply the figure by the number of devices you have.
VS air conditioning fan
However, the fan is a much more economical solution than the air conditioner. An air conditioning consumes between 1.5 and 2.5 kWh per hour. Used 4 hours a day over three summer months, it can cost up to € 226.44, or 30 times more. At equivalent power and duration of use, The fan therefore remains the least energy -consuming solution And the most profitable to refresh a room. This difference is mainly explained by the difference in technology that feeds the two devices: the fan brews the air without cooling it, which requires very little energy. Air conditioning uses a refrigerant and a refrigerant to lower the temperature, a logically more energy -consuming process.
The difference is not limited to the individual invoice. During the heat wave episodes, the generalization of air conditioning contributes to a surge in the request for electricity. In France, Consumption has jumped 13 % since the start of summer 2025 Compared to the previous year, mainly under the effect of cooling devices. The problem is that each additional degree in hot times increases the bill, the air conditioning being the main engine of this increase.
To optimize your fan, choose a low consumption model: recent devices are often more effective and less energy -consuming. Position it strategically, placing it near an open window to promote air circulation, or facing a bowl of ice to cool the flow. Close the shutters and curtains during the day, to limit room temperature rise, and reduce the need for night ventilation.
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