Casement windows are hinged at the side and open inward, to the left or to the right. They are commonly called one side opening window. They are smilar of transom window, but the hinges located on the right or left side. Both can opened or closed easily with the rotation of a handle that can be accessed easily.
These windows provide maximum ventilation and natural light. Where ventilation is required such as a bathroom or kitchen works well. They are often used where unobstructed views are desired as in a living room.