Chapter 12 Air Delivery Systems 191
Copyright by Goodheart-Willcox Co., Inc.
Figure 12-12. This drawing of an air door shows how the door opens and closes to control airfl ow.
The schematic view shows how the door is usually drawn in a diagram or schematic showing HVAC
system airfl ow.
Air door Crank
Duct
Duct
Passageway
Schematic
3-D
Air door
Figure 12-11. An independent vent installed on the right kick
panel. A knob works through a cable to open and close the vent.
(General Motors)
Figure 12-10. A—Side defroster vents direct heated and dried
air against the side windows. This improves side vision in cold,
wet weather. B—The outlets of the defroster vents direct air
against the windshield. Heated and dried air from the HVAC sys-
tem remove fog from the inside of the windshield, and helps melt
ice on the outside of the windshield. (Chrysler)
Side
defrost inlet
Rear air/
heat inlet
Side window
defrost resistor
B
Trim panel
removed
Vent
tube
Insulation
Dashboard
A