Why do people buy dehumidifiers? It’s usually to get rid of excess moisture which appears in the form of mould spores, water condensation on your windows or water stains that collect on your ceilings and walls.
Dehumidifiers typically come in a refrigerant-style. The easiest way to understand how dehumidifiers work would be to consider how condensation happens in your house. You see it in the dots of moisture that collect outside your window on a crisp spring morning.