Insulated glazing Unit (IGU), more commonly known as double glazing (or double-pane, and increasingly triple glazing/pane), consists of two or three glass window panes; separated by a vacuum or gas filled space to reduce heat transfer across a part of the building envelope. Laminated or tempered glass may also be used as part of the construction. Most units are produced with the same thickness of glass used on both panes but special applications such as acoustic attenuation or security may require wide ranges of thicknesses to be incorporated in the same unit.

The glass panes are separated by a "spacer". A spacer is the piece that separates the two panes of glass in an insulating glass system, and seals the gas space between them. Historically, spacers were made primarily of metal and fiber, which manufacturers thought provided more durability.

In addition to the improved solar performance, insulating glass offers a greater availability of coatings. Low-E coatings which cannot be exposed, and therefore cannot be used with monolithic glass, can be used inside the insulating unit where they are protected by the hermetically sealed space.

IGU
Min size: 100*100mm
Max size: 4200*2400mm / 2000*10000mm