Tilt and Turn windows are European style and have two different opening functions. They can be opened just like the doors and in additionally it can tilt with an extra accessory for ventilation function. That two function can controlled with one handle.
Tilt and Turn windows are excellent windows with special function for the places where additional ventilation is needed. Also, in European designs, used in Juliet Balcony (French Balcony) for an alternative to One Side Opening Window and it can be used as a One Side Opening Window.