How big is the bedroom window? Feng shui is the best.

The bigger the window, the better, and the best warmth and feng shui. Large, ventilation, ventilation, lighting has advantages. However, in the past, large windows were not conducive to thermal insulation, and it was difficult in winter, so we had to think that small windows were good. This problem, modern society has completely broken through the historical ban, mainly glass has made great contributions. With glass, the windows are open, ventilated and ventilated, and the air circulation is good, and the windows are closed to keep warm. This is the sense of superiority brought to mankind by human progress and scientific development. There is no glass in history, and other building materials are not comprehensive. It is not difficult to open windows in winter, but it is small and stuffy in summer.