Hyundai Elantra Owner's Manual page 205

Features of your vehicle
✽ NOTICE
It should be noted that prolonged
operation of the heating in recircu-
lated air position will cause fogging
of the windshield 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
excessively dry air in the passenger
compartment.
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WARNING
• Continued climate
system operation in the recir-
culated 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 seri-
ous harm or death due to a
drop in the oxygen level
and/or body temperature.
• Continued climate control sys-
tem operation in the recirculat-
ed 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.
Fan speed control
control
The fan speed can be set to the
desired speed by turning the fan
speed control knob.
To change the fan speed, turn the
knob to the right for higher speed or
left for lower speed.
Pressing the OFF button turns off the
fan.
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