An air flow control system for the dampers of the individual offices or rooms in a group of offices or rooms sharing a common air supply duct with a thermostatic control in but a single one of the offices or rooms. The system includes a motor operated damper in each room or office, the motor being controlled to shut the damper when a signal from a remote transmitter is received by a receiver in a control circuit with the motor. The transmitter is selectively actuated by the individual occupying the particular room or office. The control circuit is activated when the signal is received by the receiver, and after a delay period automatically sends a signal to drive the motor to reopen the damper. The occupant may thus control the closing of the damper when the temperature of the air through the supply duct causes the room to be uncomfortable, and need not be concerned about reopening the damper.