Hyundai 2009 Elantra Owner's Manual page 148

Features of your vehicle
Recirculated air position
The indicator light on the but-
ton is illuminated when the
recirculated air position is
selected.
With the recirculated air posi-
tion selected, air from pas-
senger compartment will be
drawn through the heating
system and heated or cooled
according to the function
selected.
Outside (fresh) air position
The indicator light on the but-
ton is not illumimated when
the outside (fresh) air posi-
tion is selected.
With the outside (fresh) air
position selected, air enters
the vehicle from outside and
is heated or cooled according
to the function selected.
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✽ ✽ NOTICE
It should be noted that prolonged oper-
ation of the heating in recirculated air
position will cause fogging of the wind-
shield and side windows and the air
within the passenger compartment will
become stale.
In addition, prolonged use of the air
conditioning with the recirculated air
position selected, will result in excessive-
ly dry air in the passenger compart-
ment.
WARNING
• Continued climate control system
operation in the recirculated air
position may allow humidity to
increase inside vehicle which may
fog the glass and obscure visibility.
• Do not sleep in a vehicle with air
conditioning or heating system on.
It may cause serious harm or death
due to a drop in the oxygen level
and/or body temperature.
• Continued climate control system
operation in the reciruclated air
position can cause drowsiness or
sleepiness, and loss of vehicle
control. Set the air intake control to
the outside (fresh) air position as
much as possible while driving.