Chrysler 2008 Pacifica - Manual (Page 263)

Bi-Level Mode Air comes from both the instrument panel outlets and
floor outlets. A slight amount of air is also directed
through the defrost and side window demister outlets.
NOTE: In many temperature positions, the bi-level
mode is designed to provide cooler air out of the panel
outlets and warmer air from the floor outlets.
Bi-Level Outlets
UNDERSTANDING YOUR INSTRUMENT PANEL 263
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