Open your windows instead of turning on the fan.
When it is hot, you may want to turn on the 11m or even your air conditioning system, in order to improve the temperature at your place.
To save money, instead of using them, you can always open up your windows.
By doing that, you can benefit from fresh air, aside from saving money.
To make it cooler, you can always put some ice in front of the fan if you want to.