droesch5 years ago000For which room size is the unit suitable? Can the acoustic signal be switched off?Show in original language (German)rindolone5 years ago • purchased this product000purchased this product Helpful answerAccording to the "instruction leaflet" for rooms up to 80m2. I have never heard the acoustic signal (one week in operation) - we have always ventilated in good time (admittedly also easy in summer).Show in original language (German)Comment