Is it possible to lower the dew point in a controlled
If so how might it be done?
Yes it is possible to lower the dew point. The dew point is determined by
the amount of moisture in the air. The closer the air is to saturation, the
dew point approaches the air temperature.
To lower the dew point, moisture must be removed from the air. This can be
done in several ways...the most common is to "condition" the air...that is,
run it through an air conditioner, which cools the air to condense moisture,
and then when it warms, the dew point will be lower. Another method is to
use a chemical dessicant, which absorbs moisture or humidity from the air.
Wendell Bechtold, Meteorologist
Forecaster, National Weather Service
Weather Forecast Office, St. Louis, MO
The dew point depends of the amount of moisture in the air. Processes that
reduce the humidity, such as the use of dessicants (materials that bind to
water vapor), a dehumidifier, or air conditioning , will lower the dew
Richard E. Barrans Jr., Ph.D.
PG Research Foundation, Darien, Illinois
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Update: June 2012