Hollow glass is an important part of buildings, widely used in building and window insulation. Its unique features include low permeability to water and heat, and can reduce external noise by up to 30 decibels. There are many kinds of hollow glass, such as coated insulating glass, tempered glass, glazed insulating glass, curved insulating glass and so on. These insulated glasses are used for heat and sound insulation, as well as Windows and doors applications in cold areas.

The quality of hollow glass depends on several factors, including material selection, processing and environmental conditions. Insulating glass, for example, should generally be 3 to 10 mm thick, but can be made in different thicknesses for some applications. The space between the two panes is an important part of the insulation effect. Some units also contain argon gas, which helps achieve better insulation. Different gases can also be used as vacuum.

The most significant advantage of hollow glass units is that they are very durable. The durability of the sealed insulating glass device depends to a large extent on the maintenance of argon concentration after the device test. According to this specification, the average argon concentration in the six samples must be at least 80% at the end of the test process. A single sample shall not be less than 50 percent. Qualified insulating glass units meet this standard.
Hollow glass is usually produced to order. Standard units can also be purchased. Manufacturers must have specific dimensions to ensure they are compatible with the installation process. Once the dimensions are determined, the spacers are cut to the desired height and width and then filled with desiccant. The glass plate is then cleaned to achieve optical clarity. This method of insulating glass reduces energy loss and is an excellent way to insulate any building.