A climate window consists of two windows with a ventilated cavity, between which sun blinds can be placed. The ventilation air cools the sun blinds, so that less heat is radiated in from the sun blinds.

In the winter, a climate window can be used to heat up the window and thus reduce the cold radiation from the window to the inside. This is only beneficial if there is no WTW. Otherwise the air would cool down too much to be able to recover heat from it.

When you have chosen a climate window and draw an overhang in the geometry, this overhang is applied at the outer window.