Insulating Glass Unit (IGU) Formula

This guide teaches how to read and interpret the standard formula for an insulating glass unit (IGU), such as 4M1-16Ar-4I. It explains what each number and letter means regarding glass thickness, gas-filled chambers, and low-E coatings. All UNIALGLASS insulating glass units strictly comply with Russian national standards (GOST), a mandatory prerequisite for the Russian market. This ensures that every manufactured unit matches its declared thermal and physical specifications.