Air treatment system

An air treatment system comprising:

• an air treatment unit configured to apply predetermined treatment to air passing through the unit;
• a first supply fan unit and a second supply fan unit disposed separately from the air treatment unit and configured to send outdoor air from an outdoor space to the air treatment unit and send the outdoor air treated by the air treatment unit to an indoor space;
• a first supply air duct and a second supply air duct connected to the air treatment unit and provided to guide the outdoor air treated by the air treatment unit and supplied to the indoor space;
• an exhaust fan unit disposed separately from the air treatment unit and configured to send indoor air from the indoor space to the air treatment unit and send the indoor air treated by the air treatment unit to the outdoor space;
• and
• a controller configured to control the first supply fan unit, the second supply fan unit, and the exhaust fan unit, wherein
• the first supply fan unit is connected to the first supply air duct, and the second supply fan unit is connected to the second supply air duct,
• the first supply fan unit and the second supply fan unit each include a first fan having a variable rotation speed, and a first airflow volume detection unit configured to detect airflow volume of the first fan or airflow volume corresponding quantity as physical quantity corresponding to the airflow volume, and output a first detection value,
• the exhaust fan unit includes a second fan having a variable rotation speed, and a second airflow volume detection unit configured to detect airflow volume of the second fan or airflow volume corresponding quantity as physical quantity corresponding to the airflow volume, and output a second detection value, and
• the controller controls the rotation speed of the first fan in accordance with the first detection value in each of the first supply fan unit and the second supply fan unit, and controls the rotation speed of the second fan in accordance with the second detection value in the exhaust fan unit.