Casement windows are widely used in India because of its good features. One of the feature of casement windows is that it opens inwards or outwards with the help of a sash that is fixed on outer frame. The design of casement windows can vary from fixed, side hung or top hung. Fenesta offers casement windows that are multi-chambered, steel reinforced and flying mullion for 100% opening. Check out http://www.fenesta.com/casement-windows.aspx for more information.