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 insulating glass, so that it can not continue to function and oxygen and water. At high temperatures react with oxygen double steel hollow glass, emit large amounts of heat insulating glazing, with such a high heat of reaction, the aluminum can be replaced with metal (aluminum thermal method) [1], a common taxonomy editor from other oxides. Float glass hollow II. Steel hollow glass III. Coated hollow glass IV. LOW-E insulating glass common hollow glass: 5 + 9A + 5 double hollow. Shenghai windows explained here refers to the thickness of the glass 5 is 5mm, 9 refers to a hollow portion has 9mm, the letter A is the abbreviation of air. There are models on the market 5 + 15A + 5 lowe insulating glass 69a6,5 + 22A + 5,5 + 27A + 5,5 + 32A + 5 and so on, to know the meaning of the above is not difficult to understand.