Insulating coated glass reflects heat from the building back into the interior, preventing heat loss and contributing to the comfort of the occupants. These types of glass can be assembled into double or triple glazing. Their insulating power can be further enhanced by filling the inter-glass space with noble gas (argon or krypton).
Double glazing offers twice the insulation power of single glazing, or even four times the power in the case of double glazing with super-insulating coating. By reducing heating requirements, it contributes directly to energy savings.