Air Distribution
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, and 2003 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
A vertical duct (18471) supplies air to the integral headliner air conditioning duct. Airflow is then directed to the passengers through adjustable registers. The heater floor duct (18D352) supplies air to a fixed register which is integral to the side trim panel and directs airflow through the fixed register to the passenger compartment.