1. Lighting: The skylight in the attic faces east, and there is enough lighting and ventilation direction in the east. Generally, the skylight is opened in a direction with good ventilation and lighting. If the skylight in the attic is in the west, you can only see the sun in the afternoon, and the lighting in the house is not very good.
2, Feng Shui: House layout Feng Shui believes that opening a window in the east of the attic, called Ziqi East, can bring good luck to auspiciousness. The skylight in the southwest can't be opened, and the theory of Feng Shui is fierce in the west. This answer is for reference only, please don't be blindly superstitious.