2010 Hyundai Sonata Owner's Manual - Page 112

FEATURES OF YOUR HYUNDAI 1 99 B710B01NF-GAT B670C03Y-AAT Center Ventilator/Side Ventilator The center ventilators are located in the middle of the dashboard. The side ventilators are located on each side of the dashboard. To change the direction of the air flow, turn the control knob under the vents. To control the amount of air, turn the control knob on the left side of the vents. The vents are opened when the vent knob is moved to " " position. The vents are closed when the vent knob is moved to " ". Keep these vents clear of any obstructions. Air Intake Control NOTE: It should be noted that prolonged operation of the heating system in " " mode will give rise to fogging of the windshield and side windows and the air within the passenger compartment will become stale. In addition prolonged use of the air " mode conditioning with the " selected may result in the air within the passenger compartment becoming excessively dry. ONF048078 This is used to select fresh outside air or recirculation of inside air. Fresh Recirculation With the " " mode selected, air enters the vehicle from outside and is heated or cooled according to the other functions selected. With the " " mode selected, air from within the passenger compartment is drawn through the heating system and heated or cooled according to the other functions selected.