History: Small 6 x 6 foot shower room mostly used by my wife (I use main bathroom) the room has black mould issues due to condensation, the only window is approx 2 feet tall x 6 inches wide and normally she will forget to open it, and rarely sqeejes down the tiles in the enclosure as she dashes off to work. it is due a remodel and I want to install an extractor fan. this to be located as part of the top of the window which will be next to the shower enclosure. Other options not reall viable, like directly above the shower enclosure. Now can someone explain the humidity sensor as that is what I am prefering as my understanding is the fan will be switched on through the lighting circuit but only come on if humidity is present and also have a delayed timer as in a shower but not if just using the loo, is this correct? Should I just get a timed extractor fan that always comes on when the light is turned on? Noise factor not an issue.
Any guidance appreciated.