The highest performing window. Three windows in one. With a simple move of the position of the handle the hermetically shut window (handle in 6 o’clock position) becomes a tilt window (handle in 12 o’clock position) that permits a constant draft free ventilation, or a turn window (handle in horizontal position) that opens the wing completely permitting a flow of air without restriction and facilitating the cleaning of the outside glass from inside the house without any danger, one of the most critical points in window maintenance.