Dodge 2004 RS Caravan - Manual (Page 212)

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.
Floor Mode
Air comes from the floor outlets. A slight amount of air is
directed through the defrost and side window demister
outlets.
Mix Mode
Air comes from the floor, defrost and side window
demist outlets. This mode works best in cold or snowy
conditions. It allows you to stay comfortable while keep-
ing the windshield clear.
212 UNDERSTANDING YOUR INSTRUMENT PANEL