What is a lowering window?
The term lowering window refers to a window that opens downwards, i.e. lowers.
It is often used synonymously with the term vertical sliding window but is subordinate to terminology. The name only indicates that the moving casement(s) move(s) in a vertical direction, i.e. upwards and downwards, with a vertical sliding window. With a lowering window, the window lowers, i.e. moves downwards.
As a rule, the term “lowering window” is used when the window opens downwards. This means that the prefix “lowering” refers to the opening direction. In the closed position, the moving casement of the lowering window is at the top. In the open position, the moving casement of the lowering window is at the bottom.
The opposite of a lowering window is the lifting window.
The term lowering window further specialises the term vertical sliding window.
One speaks of a lowering window when the moving casement is lowered into a lower floor, for example, a cellar or a floor pit, and is no longer visible when open.