An Axial fan is what most people picture when they think of a bathroom extractor fan. The kind you see on countless bathroom walls with a grille and a spinning fan blade behind.
A good IP45 rated one is perfect for an average domestic bathroom or en-suite. However, if fitting an axial fan in the ceiling, there needs to be consideration about how long the run of ducting is to the outside world. When installing an extractor fan, you must extract the stale air and moisture to an external vent in a wall, roof tile, or roof soffit.
Extracting moisture and steam into a loft space will cause mould build-up and eventually structural problems. A surface mounted axial fan will not be able to adequately extract outside with any real power if the duct run is longer than metres.
The system will be a disappointment, to say the least. When it comes to bathroom ventilation, cracking open a window simply is not enough, you need an extractor fan. But what are they and how do they work?
More importantly, how do you install an extractor fan? Plumbworld has put together this guide to help you understand how to fit a fan to both your wall or ceiling in a bathroom to improve ventilation.
We will also discuss why you may need an extractor fan - not just for removing steam or smells - in your bathroom. Read on to find out more about extractor fans and how to fit them into your bathroom….
Essentially, an extractor fan removes moisture from your bathroom and is essential if you want to keep your bathroom looking fresh.
By helping remove moisture from the air, a bathroom exhaust fan prevents mould from forming in your bathroom. Read more: How to Remove Bathroom Mould. UK regulations regarding how much ventilation your bathroom needs are outlined in the Building Regulations Document F.
It is a lengthy document, so we have picked out the essential information below. When it comes to the types of extractor fan, there are three common setups, which are detailed below:. Out of the three setups, the first two are the most common and easiest to install. Crucially, there are specific names for these setups. They operate differently, however. To know the size of the bathroom extractor fan you need, you will need to calculate the extraction rate - the figure that tells you how much air can be removed from a room in one hour.
This is measured in metres cubed per hour. To work out the extraction rate, you need to calculate the cubic metres of your bathroom. With a measuring tape, note down the height, width and length of the room in metres. It's hard to find reliable tradesmen but I would recommend using them.
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Miss Alston. Installing a Bathroom Extractor Fan. So, how do you decide which option is the most suitable for your home? The installation process begins with connecting the existing electrical wiring to the new fan. Then, secure the wiring by attaching a cable clamp to it. Then, screw the new fixture into place. Depending on the type of exhaust system, your bathroom can have between 50 and 1, CFM. The sound level will vary from 0.
A louder fan will give you more privacy and lessen the noise generated by the toilet. The second step in installing a bathroom exhaust fan is to make sure the wiring is connected properly. Before securing the electrical cable to the new fan, you should find the electrical splice box. You can do this either in the attic or in the bathroom. Finally, you can finish by connecting the electrical wires to the new fans.
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