1997 Chevrolet Astro Owner's Manual - Page 153

When you close a vent, it will increase the flow of air coming out of any vents that are open. If you have rear heating or rear air conditioning,you will have adjustable vents in the rear of the vehicle to help direct the airflow. The rear air conditioningvents are located in the headliner at the rear of the vehicle. The rear heating vents are located next to the second and third seat on the driver's sideof the vehicle, near the floor. You can move the vents to direct the flow of air, or close the vents altogether. When you close a vent, it will increase the flow of air coming out of any vents that are open. Ventilation Tips 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. Push 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 rotate to direct the airflow from side to side. 0 Keep the hood and front air inlet free of ice, snow or any other obstruction (such as leaves). The heater and defroster will work far better, reducing the chance of fogging the inside of your windows. When you enter a vehicle in cold weather, turn the blower fan to HIGH for a few moments before driving off. This helps clear the intake ductsof snow and moisture, and reduces the chance of fogging the inside of your windows. Keep the air path under the front seats clearof objects. Thishelps air to circulatethroughout your vehicle. 0 0 3-7