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    For complete comfort, cooling the air by air conditioning should always be accompanied by its dehumidification. Why?

    Question #25181. Asked by Nude Dude.

    sequoianoir

    You could actually create clouds, fog or dew in the environment if you did not.

    The warmer air is, the more water vapour it can 'hold.'
    Air at 30 degrees C can hold about 30 grams water vapour per cubic metre.
    At 20 deg C this falls to about 17 grams / cu m

    If air at 30 deg C containing 17 grams water vapour per cubic metere, was cooled by 10 degrees to around 20C then it would become saturated.
    Cool the air even a tiny bit more and its water vapour will begin condensing to form clouds, fog or dew - depending on whether the air is high above the ground, just above the ground, or right at the ground.

    Dec 15 02, 12:45 AM

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