I had received this information long ago: by running a fan, air circulates, which makes the person feel cool, but it actually heats the air and does not cool it. Then when the power goes out, the heat is high.
I started testing this on the basis of experience. Although it is summer nowadays, fans are running everywhere. But the fan doesn't work in my room, and believe me, I sleep comfortably, and it doesn't feel hot at all.





