Ventilation System - Chevrolet 2002 Astro Owner's Manual

Ventilation System

For mild outside temperatures when little heating or
cooling is needed, use the vent setting to direct outside
air through your vehicle. Air will flow through the
instrument panel vents.
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Your vehicle's flow through ventilation system supplies
outside air to the inside of your vehicle when it is
moving. With the side windows closed, air will flow into
the front air inlet grilles at the base of the windshield,
through the vehicle and out the rear air exhaust valve.
Outside air will also enter the vehicle when the heater
or the air conditioning compressor is running.
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Your vehicle has air vents near the center and on the
sides of the instrument panel that allow you to adjust the
direction and the amount of airflow inside the vehicle.
Move the dial on the vent up or down to direct airflow
to your preference. Increase or reduce the amount of
airflow by opening and closing the louvers. The vents
turn to direct the airflow from side to side.