The answer to 'what is dehumidifier' is a device that helps control the humidity level in a room or a home. Dehumidifiers work by removing excess moisture from the air, which can help prevent mold, mildew, and other moisture-related issues. They are particularly useful in areas with high humidity, such as basements, bathrooms, and laundry rooms.
Dehumidifiers work by drawing in warm, moist air from the surrounding environment and passing it over a cold coil. As the air cools, the moisture condenses and is collected in a tank or drained out of the unit. The dry air is then circulated back into the room, helping to lower the overall humidity level.