Thermeco's casement windows are side hung on hinges and open outward. The sash can be pushed opened or they can be cranked open with a handle. Our casement windows have one of the largest opening areas of any window type, allowing maximum circulation of fresh air. Openings can be restricted for safety. Use of an openable mullion for 2 wing configurations gives a 100% unobstructed views. Retractable flyscreens can be installed on the inside. These windows feature European technology multi-point locks for added security and excellent weather sealing. They are lockable from the inside and can be keyed. A separate sub sill is not required as a drainage channel.