Toyota 2006 Prius Owner's Manual page 294

If manual switching of air intake is de-
sired—
27p160a
Type 1 and Type 2
27p115a
Type 3
294
The air intake control switch is used to
switch the air intake between the OUT-
SIDE AIR mode and RECIRCULATED AIR
mode.
With the switch in the OUTSIDE AIR
mode, the system will take fresh outside
air into the vehicle.
If quick circulation of cooled air is de-
sired, touch the air intake control switch
for RECIRCULATED AIR.
The indicator will come on in the instru-
ment cluster while the RECIRCULATED
AIR mode is selected.
If recirculated air is used during heating,
the windows will fog up more easily.
If the hybrid system is turned off in the
OUTSIDE AIR mode, the automatic control
of the air intake is activated when the
hybrid system is turned on again.
2−way air intake control
To improve fuel economy, OUTSIDE AIR
mode control changes when the air in-
take selector is set in OUTSIDE AIR on
the following conditions:
D
When the maximum heating is needed
with the air flow in "Floor" or "Floor/
Windshield", fresh air flows in the up-
per compartment, while air is recircu-
lated in the lower compartment.
D
When cooling is needed, both fresh
and recirculate modes turns on.