Abstract: An electrical circuit for lowering windows or shields a predetermined distance, such as for allowing hot air to escape from a parked vehicle. The circuit includes a primary switch to activate motors for lowering windows, and further includes a sensor for stopping the motor when the window is lowered the predetermined distance. The primary switch may activate the simultaneous lowering of a plurality of windows the predetermined distance. The circuit optionally includes a thermostat for automatic operation when a preset temperature is sensed. In alternative embodiments, the predetermined distance and the preset temperature are adjustable.