: Why do you feel cold air from an air-conditioned room coming out under a closed door into a warmer room or corridor?

Question

Room has air-conditioning going, cooler than corridor. Much cooler.

I can feel the cold air coming out from under the closed door when standing in front of it.

Why?

In: 3

Answer 1

Also worth noting that air will naturally spread out and mix so you’d expect a cooler zone next to the door where there’s a small gap (providing there’s little circulation in the room to break up the air).