DEFROSTER CONTROLS ATTACHMENTS AND OPTIONS DEFROSTER CONTROLS 0. CONTROL PANEL 0. (1) Hot air vent (window side) (2) Hot air vent (foot) (3) Wind volume selector switch Hot Air Vent 0. This equipment (1) is used to remove the mist from the window. It is possible to change the direction of the vent by adjusting with knob (A). Foot Vent 0. When cover (B) of this equipment (2) is opened, hot air will flow to the operator's feet. 6-12