Centrifugal fans: often fitted in the ceiling, these are designed for bathrooms that are not close to an external wall, but over 1.5m away.Axial fans: these connect directly through an external wall and are used when the air doesn't need to be moved long distances.A wall fan will be called an ‘axial’ fan and we’ve explained each one more below. A ceiling fan is called ‘inline’ or a ‘centrifugal fan’. Crucially, there are specific names for these setups. Out of the three setups, the first two are the most common and easiest to install. Wall fan, ducting straight through to external vent.Ceiling fan, ducting through roof eaves, out an external wall vent.When it comes to the types of extractor fan, there are three common setups, which are detailed below:
The last point means that the 15l/s, or 54m3/hr, refers to the measurement of how much old air is replaced by new air. The ventilation requirements for a bathroom are 15 litres per second/ 54m3 per hour.This is because new-builds are built to be more airtight, so natural ventilation is much lower. In new-build bathrooms with a bath and shower, mechanical ventilation is required in the form of an extractor fan.If your bathroom has a toilet only, you are fine to use a window alone as your source of ventilation.A UK bathroom must be ventilated by either a window or an extractor fan.It is a lengthy document, so we have picked out the essential information below. UK regulations regarding how much ventilation your bathroom needs are outlined in the Building Regulations Document F. What are the rules on bathroom ventilation? Even when the fan is on, you should remember to keep the door open when your bathroom isn’t in use and open a window to keep it ventilated. Using an extractor fan during or after a shower or bath, depending on your home’s airflow, will help to remove moisture from the air. Mould and mildew thrive in warm, damp environments, so it’s vital to keep your bathroom well ventilated. Essentially, an extractor fan removes moisture from your bathroom and is essential if you want to keep your bathroom looking fresh.īy helping remove moisture from the air, a bathroom exhaust fan prevents mould from forming in your bathroom.