Thermeco's inward windows offers large opening areas allowing for maximum circulation of fresh air. Openings can also be restricted for safety. Flyscreens can also be installed on the outside. These windows are cleverly designed with an EPDM central gasket that helps seal the sash to the frame, preventing water penetration. The inbuilt drainage is a feature of this range with no requirements sizeable add on sections. The inward design makes it easy to clean both sides of the window. They can be locked and keyed plus an invisible hinge option is available.