During our everyday life, it is unavoidable to feel discomfort at least a few times brought by excessive moisture. Dehumidification and humidification devices precisely play an important role at this point and intend to eliminate the difficulties caused by humidity. Electrically-operated devices provide air condensation formed in the cold air chamber by filtering the air. After heating the air that is dehumidified, the dry air is emitted to the environment again. Dehumidifying devices are divided into 4 groups, including semi-industrial, industrial, household and heated type according to different places and needs. These devices that make our lives easier enable us to breathe freely, prevent moisture and lead a healthy/comfortable life.