The technical term for them is adsorption dehumidifier. Here is a video of a guy tearing down a typical household unit and he explains the basics of operation:

The technical term for them is adsorption dehumidifier. Here is a video of a guy tearing down a typical household unit and he explains the basics of operation: https://www.youtube.com/watch?v=mR57FhytzFk https://www.youtube.com/watch?v=mR57FhytzFk