An actuator assembly for actuating air blocking elements of an outlet assembly is provided. The actuator assembly includes an actuator arm and a selector member operatively connected to the actuator arm to rotate the actuator arm about an arm axis. The actuator arm is operatively connected to a first air blocking element to rotate the first air blocking element towards its air blocking position without moving a second air blocking element upon rotation of the actuator arm in a first direction from a neutral, non-blocking position of the actuator arm about the arm axis. The actuator arm is operatively connected to the second air blocking element to rotate the second air blocking element towards its air blocking position without moving the first air blocking element upon rotation of the actuator arm in a second direction opposite the first direction from the neutral, non-blocking position.