Vent-Axia 479460 Pure air Sense 100mm Fan. 7 Vent-Axia Has Been The Leading Manufacturer For 75 Years When It Comes To Ventilation. With This Experience Behind Them, It's No Surprise That They Are Innovators As Well, Continuously Producing New Lines With Energy Saving, Lo-Carbon Products. With A Vast Range Spanning Cool Air To Electric Heating, And Everything In Between, You Know Vent-Axia Is A Name You Can Trust With Your Ventilation Needs. The Va 479460 Pure air Sense Bathroom Fan Incorporates An ‘Odour Sense Technology’ To Detect Unwanted Smells, Which In Turn Triggers A Purge Function To Clear The Air. This Ip44 Rated Fan Operates Silently And Continuously, Helping To Maintain A Fresh And Healthy Bathroom Environment Without The Need For Harmful Sprays. The Fan Is Also Energy-Conscious, Incorporating An Intelligent, Fully Automatic Humidity Sensor For Moisture Control All Year Round, While Avoiding Nuisance Running. For Greater Control And Convenience, The Fan Includes An Adjustable Timer And Magnetic Front Cover, Along With An Easy To Use Led Touch Panel And Accompanying App.