And it's as simple as that! The Geberit DuoFresh module removes bad air directly from the toilet ceramic appliance, purifies it using a ceramic honeycomb filter and then returns it to the room. Thanks to a proximity sensor, the odour extraction switches on automatically as soon as someone sits down on the toilet. Therefore, the odour extraction is a great idea for guest toilets. Discover more about our DuoFresh feature at www.geberit.co.uk