There a number of benefits to tilt and turn windows, particularly in smaller rooms, as they can be opened on the tilt function, providing ventilation without taking up a lot of space. The tilted opening also provides more security than a casement opening, creating only a small gap at the top of the window which would not be large enough for an intruder to climb in through or for a child to climb out of.
However, they are also versatile enough to be swung open like a casement window and can even be used as a door. As these windows can open completely into the room, they are also easy to clean as they allow access to both sides of the unit without requiring the cleaner to lean out or climb up a ladder to the outside for this purpose.