Why does China have a special preference for inward opening and inward closing windows?

As long as you pay attention, you will find that inward opening and inward folding windows are the mainstream window types in public places and residential buildings in China, based on their optimized ventilation performance. When pouring in the window, not only can the room be naturally ventilated, but the most crucial thing is that air enters the room from the window and the side, without directly blowing onto the person's body. Especially when there is a large temperature difference between indoors and outdoors, it can greatly reduce the risk of catching a cold due to direct blowing. In high-rise residential or villa communities, the wind is strong in spring and autumn, and the inverted state of the windows completely facilitates smooth, comfortable, and gentle exchange of indoor and outdoor air.

Improved safety: When the window is folded inward, it is in a ventilated state and is very safe compared to external or internal casement windows, with anti-theft performance. The reason is simple - thieves can even put their hands into the window, but they cannot open the window, let alone enter the room! Therefore, homeowners can set the windows to an inward facing position when leaving their homes, ensuring continuous ventilation and eliminating the worry of others coming to visit.

Dustproof/rainproof: When the window is inverted, the airflow entering the room will first face the obstruction of the glass, and heavier dust particles in the air will not make sharp turns, naturally being blocked outside. On rainy days, due to the fact that rainwater falls from top to bottom, even if it deviates into the room due to wind direction, it will be blocked outside the window by the glass of the inward folding window. So when homeowners are not at home, they no longer have to worry about unexpected rainwater damaging furniture, floors, etc.

Easy to clean: Homeowners who live on the second floor or above and use external windows must have the following painful experience: windows are basically impossible to clean. The reason is simple: they open outward. Even if your arms are long and flexible enough to reach outside the window, unfortunately, if you live on a high-rise building, is it too dangerous to lean out of the window and wipe it? However, there is no need to worry about having an inward facing window, as long as the window is fully opened inward, it can be easily maintained.