I don't like it
One way to make an electric fan more effective is to combine it with ice. This has two benefits: it takes some of the moisture out of the air through condensation and also lowers the temperature of the air slightly. You can see my setup in the picture above. A plastic bottle 2/3 full of water, frozen, a bowl to catch the condensation (this bottle accumulates a couple of centimeters of water in the bowl by the time it thaws out completely), and something to raise the bowl so that it is in front of the fan.
If you prepare three or four bottles you can rotate them fairly constantly and maintain a more pleasant environment without the expense, environmental damage, and air quality degradation of air conditioning.
Any other tips for the summer?