Digah windows aluminum casement windows certification for residential

Swinging window
The advantages of Digah swing window are large opening area, good ventilation, good sealing performance, sound insulation, thermal insulation and good seepage resistance. Windows opening from inside are convenient for cleaning; the ones opening from outside does not occupy the space when opening. The shortcoming of swing windows is that the vision is limited. Sliding window
The advantages of sliding windows are simple, beautiful, large frame and glass , wide vision, more lighting, easy to clean, flexible, safe and reliable, long lifespan.It occupies less space for opening in flat surface and is easy to install screen window. At present, sliding window is the most widely used. Its disadvantage is that two windows could not be opened at the same time with only half window opening at most,so its ventilation is relatively poor and sometimes the sealing performance is also slightly worse. Overhanging Window
It is a new form developed on the basis of swinging windows. There are two ways of opening which means it can be opened horizontally and pushed from the bottom. When the window is closed, the lower part of the window could be pushed outward. That is to say, the window can open from the bottom.The opening part is suspended in the air, and the window is connected to the window frame by hinges, so it is called the upper suspension. Its advantages are: both ventilation and safety.