Fan designed for ventilation in wet rooms. Can also be used in other types of rooms requiring ventilation. The fan is controlled via both a moisture sensor and a timer. The moisture sensor starts the fan at the set moisture level. The timer controls run-on times after the moisture has been extracted. The timer also starts the fan when the voltage is switched on and controls how long the fan will run after the voltage has been switched off, regardless of the moisture level. The run-on can be adjusted between 2 and 30 minutes. The moisture sensor can be adjusted between 60 and 90% RH.