A dehumidifier works by drawing warm air currents into its coils via a fan. The warm air contracts as it's fed through the refrigerated coils of the machine, and condensation is left inside the dehumidifier.

What are the disadvantages of a dehumidifier?

Con: Noise and Heat

Dehumidifiers also tend to blow warm air out of the back of the unit. In the winter, this can be an advantage -- but not so much in the summer. Position the back of your dehumidifier in a doorway so that it doesn't heat up the room from which you are removing excess moisture.

How long does it take for a dehumidifier to dry out a room?

Your room dehumidifier shouldn't take more than 12 hours to work properly and knowing how much capacity your unit holds and the level of air quality will help determine how long you will need your dehumidifier running throughout the day.