If it is an open balcony, you will find that the summer heat waves directly hit the living room, and the winter cold wind enters the living room directly through the balcony door. It has been changed into a closed balcony with an additional layer of protection by finzone balcony glazing, which is more windproof and warm. Especially in the north, closed balconies are necessary. Closed balconies are relatively free from dust and sandstorms because they are cut off directly from glass windows. Especially for high-rise buildings and cities with sandstorms, closed balconies are necessary.