Timer controlled Extractor fans with a built-in timer control means that the fan will operate with the bathroom light switch and then overrun for a set amount of time to continue removing moisture from the air. This is great for steamy bathrooms, allowing you to turn the light off but continue with extraction for a short time.25 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 25 litres per second! That’s more than 1.5x what’s recommended!IP45 rating The IP rating is the ingress protection rating which is how protected an item is against solids and liquids. IP45 means that this product is protected against tools, wires smaller than 1mm and low pressure water jets from any direction.Axial  Axial type fans cause gas to flow through in an axial direction which is parallel to the shaft where the blades rotate, making the flow axial at exit and entry. Axial fans are designed to create a pressure difference and force which produces a flow through the fan.   Zone 1 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 1 as shown below.Delayed start Avoid any unnecessary use with the 2 minute delayed start function on this extractor fan. It stops it from kicking in if it's turned off again within two minutes of it being activated. Not only can this save electricity but it's incredibly useful when running to the loo at night.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 GuaranteeWhen buying anything for your home you need to know that it's 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.