By applying a voltage to the electrically conductive coating, the glass heats up, so when incorporated into an insulating glass unit, the heat flow can be directed into the living space. The two outer panes of the triple glass window contain reflective coatings reflecting the heat into the interior.
Tests in GTB Lab show a on the outside a maximum of 1 degree of temperature difference, while the inside rises to 45 degrees.
Waste during production was minimised by using the maximum production width of the glass (1180mm) as the grid size for the GTB Lab Module. In the subsequent transformation phase, no new material was used at all, but the glass was reused in its entirety.