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
The AC unit is causing positive pressure within the room. Positive pressure is when the pressure is greater than ambient. Since the pressure is higher in the room with AC, the air is constantly trying to equalize the pressure between the room and hallway. To do so it rushes out of the room through any crack or hole it can.
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