小圣百科

Condensation forms very differently depending on whether it is inside or outside the building, due to the thermal bridge effect around the cavity. Surface condensation on the internal face always starts in the corners, mainly due to the additional cooling caused by the thermal bridge.

In certain circumstances, the colors of some materials, when exposed to direct sunlight, can fade.  Materials can change color when exposed to solar radiation. The most efficient way of preventing fading is to exclude ultra-violet radiation, since despite its low proportion within the electromagnetic spectrum, it is the main contributory factor to the process.

You may need to choose the glass product according to the local building regulations. Normally in the north region of China, it is cold and severe cold area, then the lower U- Value becomes the most important factor for you when choose the glass. 

There have three major considerations when we need choose high advanced energy saving glazing: The light Transmittance (TL), the U- value, and Shading Coefficient (SC). 

The overall performance of a window is dependent on the combined effect of frame and glazing components and the air-tightness of the finished window. Ratings maybe improved by decreasing thermal losses.