Can I open the window of the darkroom on the second floor leading to the hall?

* * Yes * *. In general, the darkroom on the second floor can be windowed, which can increase the ventilation and lighting of the room. If the window of the room is facing the hall, it is recommended to open the window on the side of the room to avoid directly affecting the hall.

The above suggestions do not involve feng shui. If necessary, it should be considered from the perspective of geomantic omen.