What is the best size of the bedroom window?

Generally, the bedroom window has a certain size. In common building, the height of the window is generally set at 1．5m, the height of the window sill is generally ．9m, and the distance between the window and the window top is 2.4m. Generally, a structural height of ．4m is needed. For some public buildings, the height of the window and the windowsill is unequal, which is between 1. and 1.8m. For the window sash opening to the public walkway, the height of its bottom surface should not be less than 2．m. As for the height of the window, it is determined according to the requirements of lighting, ventilation, spatial image, etc., but we must pay attention to the problem of excessive stiffness of the window, and if necessary, add beams or "spelling". In addition, protective measures should be taken when the window sill height is lower than ．8m.