Awning windows are hinged at the top and you can use this to your advantage. An Awning window can be left partly open for ventilation while it’s raining with little risk to water penetration, within reason. An Awning window tends to draft out more air than it draws to the interior. Most people use a combination of Awnings and casements throughout their home, allowing varied ventilation in different rooms.
The hinging of a venting window can be a factor in the window configuration, and therefore the home appearance. For security purposes awning windows have snap-in glazing on the inside as well as two multipoint levers for locking.