Louvre window is the one with a shutter or window blind with horizontal or vertical slats and these angled so that they allow light and air to enter but blocks rain and direct sunshine. It allows air flow up to hundred percent of the window area. The blades or slates are adjustable and the flow of air is controlled through them by changing their position. The blades can turn 180 degrees and let as much air as possible to enter the room. One of the greatest advantages is that the louvers can be easily cleaned form one side due to 180 degree rotation.