Double glass sandwich windows are windows that consist of two panes of glass, with a spacer between the two panes. The spacer is typically made of aluminum or another type of metal, and it is filled with a drying agent, such as desiccant, to absorb any moisture that may be present in the air between the two panes of glass.

Double glass sandwich windows have several benefits. They are energy efficient, as the airtight seal between the two panes of glass helps to reduce heat loss in the winter and heat gain in the summer. They also reduce noise pollution, as the two panes of glass act as a barrier to sound. In addition, double glass sandwich windows are durable and long-lasting, as the spacer between the two panes of glass helps to prevent the glass from breaking or shattering.

Double glass sandwich windows are often used in commercial and residential buildings, as they provide a cost-effective way to improve the energy efficiency and comfort of the building. They are also commonly used in high-rise buildings, as they can withstand the wind loads and other stresses that are typical of such buildings. Overall, double glass sandwich windows are a popular choice for their energy efficiency, noise reduction, and durability.