This shutter is only for decoration.
Shutter is a kind of window, which originated in China. In ancient buildings in China, there were straight lattice windows, which were used in all dynasties from the Warring States to the Han Dynasty. The straight column is called the straight grid window, and the horizontal column is called the lying grid window.
Transverse lattice window is an original style of shutter, which can also be said to be the original state of shutter. Modern shutters were invented by an American named John Hampson, and the invention patent was obtained in August of 2 184 1. Shutters are generally wide and are generally used for indoor and outdoor shading and ventilation. Shutter curtain wall has many functions and advantages, and it is very beautiful, and is generally used in high-rise buildings.