Motion sensor & timer control Not only will these fans run when the light is turned on but they also work using a motion sensor. Detecting movement in the room and activating to ensure you never get a build-up of moisture. After you have left the room a timer continues to run the extractor fan for a predetermined amount of time. 19 ltr/s extraction rate Building regulations stipulate that extractor fans need to be able to extract at least 15 litres of air per second. It’s needed to ensure a minimal build-up of moisture in the room, reducing mould and grime in damp areas. This fan will extract a crazy 19 litres per second! That’s nearly 1.5x what’s recommended! IPX5 Rating This product have a rating of IPX5, meaning it is protected from water jets that are projected by a nozzle (6.3mm) from any angle.   Zone 2 Rated IP rating stands for 'Ingress Protection rating' and this helps us determine what bathroom electricals can go in particular bathroom zones. An IP (Ingress Protection) number or code is used here in the UK to specify the environmental protection of enclosures around electronic equipment. These ratings are determined by specific tests. These extractor fans can be fitted within Zone 2 as shown below. Toilet & bathroom suitable With high extraction rates this extractor fan is suitable for use in both a cloakroom toilet and a full family bathroom.  3 Year Guarantee When buying anything for your home you need to know that its going to stand the test of time. This is why this product comes with a fantastic 3 year guarantee against any manufacturing defects should the worst happen and the product is not up to standard.