Glazed doors and windows are the major approach for communications between indoor and outdoor spaces. Daylight, sight and decoration are the basic functions of glass while energy efficiency and environmental protection are further additional requirements to glazed doors and windows. For a well-closed space, the indoor and outdoor thermal exchange is mainly achieved through glass. The thermal exchange in large volume between indoor and outdoor spaces means that, in summer, unneeded heat is introduced into the rooms while in winter, the valuable indoor heat flows outward, which worsens the indoor living environment and leads to enormous increase in energy consumption by air conditioners and/or heaters. Insulating glass, especially that combined with solar reflective glass and/or Low-E glass, provides a sound solution.

Insulating glass comprises two or more plies of glass that are separated with aluminum spacer fully filled with desiccant, and the sides are sealed with high-strength sea