Tilt and Turn windows can be opened fully inwards from the sides like traditional casement windows. However, when the handle is rotated upward, the bottom locks into place and the window tilts inward, providing draft-free ventilation. Tilt and Turn windows are popular in Europe due to their flexible functionality. Tilt and turn windows can be used as a fixed window, an inward opening window, or an inward tilting “hopper window”.