Tag Archive: electric Velux Kem 140 Electric motor VS/VSC No Wire. New Never Installed FACTORY OEM Electric Window Opener/Actuator System ACK4 24V White with brackets 24V Electric Window Opener / Chain Actuator SECO N 24 25 x 350 SE Products Velux Electric Roof Windows Roofingoutlet TOPP ACK Electric Window Opener/Actuator System ACK4 230V White Electric Window Opener/Actuator System ACK4 24V White Electric Window Opener/Actuator System ACK4 230 or 24V White Electric Window Opener / Chain Actuators ACK 4/ACK5 230 V & 24 V Models Flat-Roof Light, 24v electric motorised with control unit Roof Window Skylight Opening Electric Flat Rooflight