Exhaust overhead fans. For installation in ventilation shafts or connection to air ducts. The fans are equipped with shutters that open automatically while the device is operating. When closed, the blinds block air movement, eliminating drafts. Protection level – IP24. The thermal actuator ensures smooth opening and closing of the blinds within 45 seconds after turning the fan on/off. The fan will turn on when the built-in sensor detects that the specified humidity level has been exceeded. The device will reduce it to the set value, after which it will work for another 15 minutes. and turns off. The default humidity value is 70%, but can be changed to 50 or 90% if desired. The timer operating time can also be changed to 5 or 30 minutes.