In the house, facing the door, the direction you face at this time is the direction of the house. This is called "Xiang" and the position of the house is called "Left". Then the house facing south is the house facing north and the door facing south.
Now the building faces south, which basically means that the main functional rooms (such as living room and master bedroom) of the house face south, or the main lighting surface of the house is on the south side.