An awning window hinges at the top and projects away from the home. A casement is a similar style of window, except it hinges on the side. Awnings and casements come in two styles: push-out, which you manually push open and pull closed with a cam handle, and the crank casement, which has a roto gear mechanism that you turn to open and close the window. One challenge with the push-out style casement is that it requires a hinged screen or no screen so that the window can be operated.