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How do dehumidifiers work?

Dehumidifiers have a cooling system that refrigerates the air entering the unit. The moisture in the air condenses on the cold coils and then deposits into a removable container (a.k.a. water container, water tank or water reservoir) located at the bottom of the unit. The cold air is then passed over a warm set of coils, which warms the now-dry air back to its original temperature.