Mazda CT-L1005, Training Manual

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Fundamentals Basic Climate Control
Dehumidifying the Air
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The air entering the vehicle normally has a relatively high humidity. When this humid air
comes in contact with the cool surface of the evaporator the moisture in the air will
condense as tiny droplets of water. These water drops will accumulate and run down the
evaporator, and leave the vehicle through the drain tube.
•
There is no way to actively control how much moisture will be taken from the air, this is
determined by the dew point, which depends on the current air temperature and the
relative humidity of the air. Operating the A/C allows the evaporator to cool down, and for
the moisture in the incoming air to condense. This process can also be performed when
heating or defrosting, by turning the A/C on, and then selecting a warmer temperature.
This is especially effective when demisting or defrosting.
NOTE : This is the only one of the comfort factors that cannot be directly influenced by the
driver. The relative humidity can be indirectly reduced by operating the A/C and
forcing the humid air through the evaporator.
02-8 Curriculum Training