Locking drives offer additional safety for your large smoke and heat extraction or ventilation windows. They are the solution for large leaf areas, when locking with the drive's retention force is not sufficient. With additional locking drives, windows can withstand wind load. They provide sealing in the event of pelting rain and are air tight, in addition to providing increased burglar resistance. GEZE also offers locking elements for window ventilation systems with manual fanlight openers for mechanical ventilation.