You may not realize it, but your car and truck has more glass than just the windshields and retractable windows. The vent window is a definitive part of the difference in designs amongst auto makers, merging form and design of the vehicle, with venting functionality.
What are vent windows?
Vent windows are auto glass windows that are mounted on the sides of vehicles, usually next to retractable windows. Vent windows differ from quarter glass when they can tilt open. In the last 20 or so years, almost no vent glasses open on passenger cars. Now the purpose is cosmetic or to make rear door glasses able to roll down farther than they would without the vent glass, due to the rear wheel taking up part of the corner of the door. Vent windows are in rear and front windows, or sometimes in front of the front doors.
How were vent windows developed?
The vent window was created by placing quarter glass on a hinge, to allow ventilation of the passenger cabin, back when cars did not have air conditioning. The quarter glass vent window has since gone out of style in automobile design.
What are some uses of vent windows?
To the ever-watchful driver, vent windows provide a quick glimpse of the road surrounding the vehicle so that the driver may turn, accelerate, park, or change lanes safely.