Insulating glass (IGU) is a type of architectural glass made of two or more panes separated by a spacer, forming a sealed air space or inert gas layer (such as argon) in between. It is widely used in windows, doors, and curtain wall systems.

Insulating glass typically consists of the following components:

• Glass panes: such as float glass, tempered glass, laminated glass, Low-E glass, etc.
• Spacer (aluminum or warm edge spacer): used to maintain the gap between glass panes
• Desiccant: absorbs moisture inside the cavity to prevent fogging
• Sealant (double sealing): ensures the airtightness of the unit
• Gas layer: air or inert gas (such as argon or krypton)

Main Features

1. Thermal insulation
The air or gas layer effectively reduces heat transfer, especially when combined with Low-E glass, providing excellent energy-saving performance.

2. Sound insulation
The air or inert gas layer reduces sound transmission, typically by about 20–40 dB.

3. Anti-condensation
The dry air layer minimizes condensation caused by temperature differences between indoors and outdoors.

4. Energy efficiency
Reduces energy consumption for air conditioning and heating, meeting green building standards.

5. Improved comfort
Helps maintain stable indoor temperatures and reduces cold radiation effects.