DEHUMIDIFIER high quality ultrasonic 10 , 15, 20 Etc Litres , it's a built-in air purification system included to help remove mist , pintas, allergens , waiter rooms, pollen and bacteria, in addition to clearing the air of unpleasant odours in a room or sorroundings. The lightweight compact design makes the dehumidifier easy to move room-to-room.ir purification system included to help remove allergens such as pollen and bacteria, in addition to clearing the air of unpleasant odours in a room or sorroundings. the lightweight compact design makes the dehumidifier easy to move room-to-room.