The case with the mezuzah is attached to the jamb, which is located to the right in relation to the person entering the room. The direction of the person entering the interior is determined by the direction of his movement from the main entrance. In Chabad, they adhere to a different tradition: in the interior of the house, the direction of the incoming person is determined by the direction in which the door opens, while it is considered that the incoming person opens the door from himself.
