The xpelair simply silent dx150s is a 150mm two speed extractor fan with a traditional grille style fascia finished in cool white it is suitable for a wide range of applications including larger bathrooms utility rooms and kitchens the fan meets buildings regulations part f and has a standard control which means that when connected to a remote switch such as a lighting circuit the fan will turn on when the circuit is switched on and off when the circuit is switched off the simply silent dx150s u