A multifarious range of actuators for window automation are mainly in the area of 24 V DC. The Folding Arm² motor family or the special kinematics of the slit actuators approved for smoke ventilation are developed for extra-low voltage. For powering this kind of technology the company Simon RWA Systeme GmbH offers with their VENT 3/6 a compact control unit for natural ventilation in private and industrial use. Powered by 230 V AC the VENT 3/6 supplies constant 24 V DC with whether maximum 3 Ampere or 6 Ampere output current. Two motor channels in one ventilation group offers the connection of several actuators.