1994 Chevrolet Astro Owner's Manual - Page 130
1994 Chevrolet Astro Manual
Page 130 highlights
Comfort Controk Flow-Through Ventilation System W W Your vehicle's flow-through ventilation system supplies outsideair to the inside of your vehicle when it is moving. With the windows closed, air side will flow into the front air inlet grilles at the base of the windshield, through the vehicle and out the rear exhaust valves. Outside will also enter air air the vehicle when the heater or the conditioning fanis running. air Ventilation Tips Keep the hood and front air inlet free of ice, snow, or any other obstruction (suchas leaves). The heater and defroster will work far better, reducing the chanceof fogging theinside of your windows. When you enter a vehicle in cold weather, turn the blower fan HIGH to for a few moments before driving off. This helps clear the intake ducts of snow and moisture, and reduces the change of fogging the inside of your windows. Keep the air path under the front seats clear of objects. This helpsair to circulate throughout your vehicle. 0 3-2