How high is the temperature in the south?

Everyone feels different, so according to personal feelings, 20 degrees is the most comfortable temperature for the human body, neither too cold nor too hot, just blowing natural wind. If it exceeds 20 degrees and reaches 25 degrees, turn on the fan appropriately.

It's very hot. You can turn on the electric fan, according to your personal feeling. Generally, when the outdoor temperature reaches more than 30 degrees and the indoor temperature reaches 30 degrees, you can turn on the electric fan.