The number of windows should not be too much: the inside and outside air of the home can easily enter and exit through the windows, but too many windows will make the internal air difficult to calm down, and it is easy to be nervous and difficult to relax at home.
The window size should be moderate: the windows in the living room or bedroom are too large or too many, which may easily lead to indoor air leakage and family disharmony. If this happens, blinds or curtains can be hung to make up for this defect, but blinds absorb outside air more easily than curtains, so the effect is better than curtains.
Shutters can also block the air: curtains are indispensable for protecting rooms, shielding sunlight and dust, or beautifying windows.
The window opening method should be outward: it is best to open the window outward or to both sides so as not to interfere with the area before and after the window opening. Inward-opening windows will make residents shrink back. Inward-opening windows are often blocked by curtains or shutters, making it difficult to open them. If the window opens inward, you can put bonsai or stereo under the window to enhance this energy. For reference, I hope it can be adopted.