1997 Buick Park Avenue Owner's Manual - Page 158

Ventilation System For mild outside temperatures whenlittle heating or cooling is needed, use VENT to direct outside air through your vehicle.Air will flow through any of the outlets depending on outside temperatures and comfort level settings. Your vehicle's flow-through ventilation system supplies outside air into the vehicle when it's moving. When the vehicle is not moving, you can get outside air to flow through by selecting anyair choice (except the rear window defogger) and any €an speed. Adjust the direction of airflow by moving the louvered vents. You have rear passenger comfortemp outlets that you can use to adjust the direction of the airflow to the rear seating area. The temperature is controlled by the front passenger setting.