The air is sucked through an exhaust duct and passed on to the fan housing. There, a certain amount of air is delivered to the exhaust system of the building and the remaining air is circulated. A controller in the fan housing determines how much air goes to the exhaust air system and how much is to be circulated.
Ventilation with circulating air is the fastest way to get wet towels and clothes in lockers dry. The lockers are equipped with dry air ducts, which are connected to the circulating air unit SONO-VENT. Air evaporation is accelerated by airflow in the locker. The fan presses the air streams through a supply air duct, which is located at the top of the locker.