What is the orientation of modern residential quarters?

If you are in a building with doors extending in all directions, you will not be allowed to sit in the building if you don't ask. You must sit at the door of the unit itself. In one case, the so-called air intake means air intake. Although you live on the tenth floor, all the incoming air will eventually pass through the door of your building. If the building has a clear sitting direction and all the residents at the gate come in and out from the same gate, then you should choose the sitting direction of the building as the air inlet.