Toyota prius Owner's Manual page 351

 Using the automatic mode
Fan speed is adjusted automatically in accordance with the temperature set-
ting and ambient conditions. As a result, the following may occur.
 Immediately after
warm or cool air is ready to flow.
 Cool air may flow to the area around the upper body when the heater is
on.
Switching between outside air and recirculated air modes

Recirculated air mode or outside air mode may be automatically switched in
accordance with under these condition, such as temperature setting and
inside temperature.
Also, outside air mode may be automatically switched to when the outside
temperature is low.
 Using the system in recirculated air mode
The windows will fog up more easily if the recirculated air mode is used.
 Window defogger feature
 Recirculated air mode may automatically switch to outside air mode in
situations where the windows need to be defogged.
 When the outside air temperature is low, it may take a while for the con-
densation to clear from the windshield.
 When
For your driving comfort, air flowing to the feet may be warmer than air flow-
ing to the upper body depending on the temperature setting.
PRIUS_OM_OM47871E_(EE)
3-1. Using the air conditioning system and defogger
is pressed, the fan may stop for a while until
is selected for the air outlets used
3
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