General buildings (room height of 2.8 meters, normal ground buildings with doors and windows closed), the reference for room area setting dehumidifiers is: dehumidifier capacity of 20 liters per day is suitable for an area of about 20 to 30 square meters; dehumidifier capacity of 30 liters per day is suitable for an area of about 30 to 40 square meters; dehumidifier capacity of 50 liters per day is suitable for an area of about 50 to 70 square meters; dehumidifier capacity of 90 liters per day is suitable for an area of about 100 to 150 square meters.。