There are times when the natural humidity is too high to be
comforatble. The answer is to remove moisture from the air to
make it more tolerable as well to reduce the chance of mold
forming. A dehumidifier can do this. The way they work is to
blow the moist air over a cold surface. This will cause
condensation which will remove moisture from the air.
To see a Dehumidifier, try this link: