It's MINUS three degrees outside. Do you need to turn on the heating?

/kloc-you can turn on the heating in the weather below 0/4 degrees.

The temperature difference between the north and the south is relatively large, and the habits are not the same. Southerners 10 degrees below the start of heating, small temperature difference between day and night. Northerners usually turn on the heating at 15 or 16 degrees. Because of regional differences, the temperature difference between day and night in some areas is large, so heating in the north is earlier than that in the south.