First of convection on both sides of the insulating glass, and then pass it through the whole hollow glass, forming energy loss. Hollow glass reasonable design, can reduce the gas convection, thereby reducing convective energy loss. Conduction transfer conduction passing through the hollow glass molecular movement of objects it, driving energy of movement, and achieve the purpose of passing, like rice and wok for things like electric soldering iron, and insulating glass for energy transfer by conduction glass and its internal air to complete. High-performance insulating glass insulating glass, due to a layer of special metal film can reach 0.22-0.49 shading coefficient, the indoor air conditioning (air) lighten the load. Heat transfer coefficient 1.4-2.8W (m2.K), better than ordinary insulating glass. Lighten the load on the indoor heating, also play a significant efficiency. So loe insulating glass windows open the bigger, more obvious energy saving effect. High-performance insulating glass can block the sun from hitting the interior of considerable energy, which can prevent radiant heat caused discomfort and reduce the glare caused by sunlight sunset.