Gold, copper and silver metal coating far infrared region, the wavelength range is greater than 4μm, the high reflectivity. The metal coating is a typical thickness of the hollow glass openings, all reflectance of 90% -95%, high infrared reflectivity is equivalent to low-emissivity (Low-e), which will reduce the insulating glass assembly of radiation inside and outside the glass conversion, and the corresponding is relatively insulated glass and the air layer is 12mm standard insulating glass member, its insulation value can be from 0.3W / (m2.K). The use of insulating glass insulating glass are used primarily for heating, air conditioning, preventing condensation and noise or no direct sunlight and need special light buildings. Widely used in the case of indoor air conditioning needs of residential, restaurants, hotels, office buildings, schools, hospitals and shops. It can also be used in trains, cars, ships, freezer doors and windows and other places. Acting hollow glass aluminum gutter: the aluminum is known as active metal elements, but in the air, the surface will form a dense oxide film, so that it can not continue to function and oxygen and water. At high temperatures and low oxygen reaction hollow glass and emit a lot of heat, with such a high heat of reaction, the aluminum can be replaced with metal (aluminum thermal method) [1] from other oxides