Hyundai Sonata LF Owner's Manual page 224

Convenient features of your vehicle
Air intake control
This is used to select outside (fresh)
air position or recirculated air position.
To change the air intake control posi-
tion, press the control button.
3-128
Recirculated air position
With the recirculated air
position selected, air
from
compartment
drawn through the heat-
ing system and heated
or cooled according to
the function selected.
Outside (fresh) air position
With the outside (fresh)
air position selected, air
OLF044211
enters the vehicle from
outside and is heated or
cooled according to the
function selected.
i
Information
It should be noted that prolonged
operation of the heater in the recircu-
the passenger
lated air position (without air condi-
will be
tioning selected) will cause fogging of
the windshield and side windows and
the air within the passenger compart-
ment will become stale.
In addition, prolonged use of the air
conditioning with the recirculated air
position selected will result in exces-
sively dry air in the passenger com-
partment.