1998 Chevrolet Astro Owner's Manual - Page 159

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 conditioning vents 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 side of the vehicle, near the floor. You can move the vents to direct the flow of air, or close the vents altogether. When you close avent, it will increase the flow of air coming out of any vents that are open. Ventilation Tips e Keep the hood and front air inlet free of ice, snow or Your vehicle has air vents near the centerand on the sides of the instrument panel that allow you to adjust the direction and the amount of airflow inside the vehicle. Move thedial on the vent up or down to direct airflow to your preference. Increase or reduce amount of the airflow by opening and closing thelouvers. The vents rotate to direct the airflow from side to side. When you close avent, it will increase theflow of air coming out of any vents that are open. any other obstruction (such as leaves). The heater and defroster will work far better, reducing the chance of fogging theinside of your windows. e 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 intakeducts of snow and moisture, and reduces the chanceof fogging the inside of your windows. a Keep the air path under the front seats clear of objects. This helpsair to circulate throughout your vehicle. 3-7