Non-return valve (prevents reverse air flow when the fan is off)
Adjustable timer
Adjustable Hygrostat
The model is equipped with a hygrostat (humidity sensor) and an adjustable timer (2-20 min.). The hygrostat can be set to a relative humidity level of 60% to 90%. In automatic mode, the fan operates according to the hygrostat: it turns on when the humidity level in the room rises above the set value and turns off when it decreases and after the time set on the timer. The fan can be connected via an independent switch or a light switch. In this case, in addition to the automatic mode, the fan also turns on when the light is turned on and turns off after the time set on the timer. The humidity sensor takes precedence over the external switch.