<p>The device has a control device (34) for controlling an active ventilation element and passive ventilation elements such as roof light (16) and a hopper window (18). The active ventilation element is designed as an outer wall device (26) and positioned below the passive ventilation element at the outer wall. The active ventilation element sucks outside air by an outside air opening in the outer wall and delivers as supply air in the room. The control device comprises an operating mode in which the active and passive ventilation elements are simultaneously operated.</p>
