2019-05-31 Why to Choose Low-E glass for your windows? This special thermal coating has the characteristics of high transmission to visible light and high reflection to far infrared ray, which makes it have excellent heat insulation effect and good light transmission compared with ordinary glass and traditional coating glass for building. It keeps heat on the right side of the glass. In the winter, low-e window glass keeps the heat inside, and in the summer, low-e glass keeps solar heat outside.