The best bathroom extractor fans to prevent damp and mould

Fitting the best bathroom extractor fan you can get your hands on will not only making spending time in your bathroom more enjoyable but it will also mean you won't run in to problems with mould later down the line. 

However well you plan your bathroom design, this is a room that is, unavoidably, one with high levels of humidity thanks to the activities that take place in there on a daily basis – namely hot showers and baths. 

Problems occur when the the warm fuggy air in the room cools down – trapped humidity turns into water which can encourage mould and fungus to grow. This is neither good for our health or the room. 

This is where a high quality and effective bathroom extractor fan can save the day. These mechanical ventilation devices suck out the moisture that builds up in your bathroom, quickly removing odours and preventing mould growth, as well as staving off rusting and paint peeling.

Take a look at the best bathroom extractor fans available now to prevent humidity building up in your bathroom. 

The Quick List

Struggling for time to find the best bathroom extractor fan to ensure good bathroom ventilation for your space? Take a look at this quick overview of all the fans on this list, along with handy quick links that allow to you skip down the page to get right into a more detailed review of the particular product that you like the look of. 

Best overall model

Aside from its pleasingly subtle design, the Envirovent SIL100T Silent Extractor Fan is our overall winner for many reasons. 

Top of the list has to be that fact that it is impressively quiet to run, releasing just 26.5 dB at 3m noise output, which is achieved through the motors being mounted on silent elastic blocks.

It also comes with an adjustable humidity sensor that lets you set the relative humidity level (between 60-90%), and this will turn the fan on when required to help prevent condensation. It will then continue to operate until the relative humidity level is achieved (it doesn't take long, circulating air at the rate of 96 m3/h), and will turn off when the moisture level drops below your set level. 

The run-on timer is another practical feature, which automatically calculates how long the fan should operate based on how long it has been running. The timer delay can be set manually for up to 30 minutes. 

Quietest fan

The Xpelair C4TS is one of the quietest bathroom extractor fans on the market. This makes it possible to fully relax in your bathroom in peace while it's doing its thing in the background. It also means any family in close proximity (such as sleeping children) won't be disturbed. 

It can be easily installed on a wall, ceiling or panel - it simply requires a 'twist and click' to secure the lock it into place. And during installation you can select from two motor speed settings - 15 litres per second (l/s) and 21 l/s, or 54 metres cubed per hour (m3/h) and 75 m3/h. The slower speed is very quiet, but takes a bit longer to demist your bathroom.

Plus, while looks aren't always everything, this is a beaut that will easily fit with most modern bathroom ideas. Sleek and smooth, the white finish will blend in with any type of bathroom decor. 

The timer can be adjusted between periods of 30 seconds and 30 minutes, and the fan comes with a two-year manufacturer's guarantee. 

Best for energy efficiency

While not as powerful or quiet as the top two fans on this list, Manrose's QF100T fan boasts performance-enhancing design credentials that make it a really excellent product.

One of these features is a turning vane system, which smoothly directs air in the duct and reduces resistance when there is a change of direction. This ultimately helps to deliver high output. 

A backdraught shutter is included too, which prevents air flowing in the wrong direction when the fan is turned off. This is a really energy-efficient design choice, with the motor consuming a maximum of 4.8W.

The fan is made from ABS thermoplastics so it's very durable - handy for those after family bathroom ideas who might be worried about a fan getting damaged. It also  comes with a three-year manufacturer's guarantee.

Best in-line extractor fan

Ok, so this one might not be winning any awards for good looks, but if you're willing to overlook it's aesthetic quirks, the Blauberg UK Turbo-150 is a high-power extractor fan that offers good value for money.

This is an in-line fan (more on this below) which means it's specifically designed to fit in your ceiling when your bathroom is very far away from an external wall, as can be the case with some small ensuite ideas that have been squeezed into awkward spaces. It fits several different duct diameter sizes, so there should be something suitable for your home. 

It can be electrically wired directly into 240V mains power with a 50W motor, and has an efficient range of mixed flow extractor fans - it can reach an impressively high air flow rate of up to 560 m3/hour. It takes roughly 30 minutes to install, including the wiring.

Best centrifugal fan

Centrifugal fans can generate more pressure than axial wall fans, and because they can extract down much longer duct runs it makes them a great choice for bathrooms which are much further away from an external wall. 

The versatile Solo Plus T from Vent-Axia is our top centrifugal fan pick for a few reasons. Firstly, it offers a choice of two boost motor speeds at installation - medium (17l/s) or high (22l/s) - and you can also select an optional constant trickle speed (9l/s) so there's always some flow through the room (even when no one is in there). You can revert back to your chosen setting via a pull cord, light switch or the humidity sensor.

It also comes with a 'delay' option, which means the fan won't kick in for around five minutes after the light is turned on. If you were to have a shower, for example, then it will continue to run for 20 minutes after the light is turned off to clear the humidity.

It can be mounted on a surface or installed flush, and the impeller allows for installations with longer duct runs using 100mm ducting. It comes with a two-year manufacturer's guarantee. 

Best budget buy

Perfect for anyone worried about the cost of fitting a bathroom, the Manrose XF100S axial fan is not only a very affordable bathroom extractor fan but it also extremely well-reviewed on Amazon.

One understandable concern about buying an extractor fan this cheap is the quality, but the XF100S is built with ABS thermoplastics for durability (useful in busy family households). It also comes with an impressive extraction rate and flexibility for mounting on the ceiling, window or walls. 

At 37dB it is on the noisier side, but it is relatively easy to install - there is no timer function therefore it turns on when the bathroom light is on, meaning there's there's just two wires to connect. However, both internal wires are black so be sure to read the sticker on the casing to see which is which. 

What are the different types of extractor fans?

There are three basic types of bathroom extractor fan:

• Axial (also known as wall fans) – the most common household extractor fan, these connect through an external wall, or in the ceiling on a very short duct run, and are generally cheaper and easier to install
• Centrifugal – these are best for bathrooms far away from an external wall (over 1.5m away), and can be mounted on the wall or ceiling. They tend to generate more pressure than an axial machine
• Inline – installed in your loft space, these machines sit on a length of ducting and have a much higher extraction rate, so they tends to be more expensive. They are effective options for extra-long distances of 40 metres or more to your nearest external wall.

How to select a bathroom extractor fan

If you've decided that a bathroom extractor fan makes sense for your house, then look for these factors when making your choice. 

Air extraction rate

This specifies how much air can be moved in a time interval. The larger bathroom you have, the higher the rate you'll need. 

Most models far exceed the 15 l/s or 54 m3/hr minimum requirement in the Building Regulations, although those with higher extraction rates tend to produce more noise.

Size

Domestic extractor fans come in two sizes: 4-inch /100mm and 6-inch / 150mm.

A 4-inch model will suffice for most households, whereas 6-inch machines are appropriate for larger bathrooms (generally greater than 9m2), or those which are frequently used by larger families or households.

The size of the extractor will determine where it can be placed, and whether or not it can fit in your bathroom. 

Noise

Bathroom extractor fans can be loud. So if noise is a big concern, particularly at night-time when you have sleeping children, then try to avoid fans at 30db and under. You can also look out for fans with silent running ball bearing motors, which help to reduce noise further.

Turning on and off

Extractor fans have to be turned on to start moving air and turned off to stop, and a number of features can affect how this happens. A fan might come with a pull cord for activation, or it can be wired to turn on and off via your light switch. 

Some fans with humidistats will turn on automatically when the humidity in your bathroom reaches a pre-set level (and turn off when this level falls), while others come with PIR (Passive Infra Red) sensors which operate automatically when somebody enters the room.

Timer

Fans with timer models allow it to run for a set period of time even after you've turned your shower and lights off. This helps to ensure that all steam has been extracted. 

And run-on timers automatically calculate how long a fan should operate based on how long it has been running. 

FAQs

Can I install my own bathroom fan?

If wiring needs to be installed to fit your bathroom extractor fan then it is recommended to hire a professional electrician to make the hole and install the wiring.

But if you're replacing a standard-sized extractor fan, the hole will already be present and you can do this yourself on a DIY basis. Just make sure to turn off the mains power before you remove the old fan and be sure to familiarise yourself with how to fit an extractor fan first.

Do you have to vent a bathroom fan outside?

Yes. Bathroom extractor fans remove moisture from the air, so if this air is deposited into your loft or another room then the problem is moved to another area.

Ensuring your fan exits outside your home will help you to avoid damp and mould entirely.

Bear in mind that while it is not a legal requirement to own an extractor fan if your bathroom has an openable window, but buying a bathroom extractor fan is still a good idea - plus, they come in different shapes and size so you can find the right fit for your home

How we review bathroom extractor fans

Here at Homebuilding.co.uk we like to get our hands dirty and trial as many products as possible, but in the instances where we aren’t able to, such as with the best bathroom extractor fans, we leave no stone unturned to provide you with the crucial information you need to know before buying. 

Our team is passionate about DIY and home improvement (which probably won’t be a surprise) so we already have knowledge about the brands that make these extractor fans. Moreover, we have taken into account user reviews when compiling this buying guide, and gleaned key information from our sister sites such as Real Homes and Ideal Home. 

There's a lot to consider to ensure you buy the best extractor fan for your bathroom, and we’ve scanned the pros and cons of each model in this buying guide to ensure you feel confident in choosing the right product for your home. 

It isn't just bathrooms that need the best ventilation methods you can get your hands on – kitchens also rely heavily on products that help to keep them steam, moisture and odour free. 

Be sure to buy the very best kitchen extractor fan you can – and make quiet running noise a priority if your kitchen is open plan to a dining or living space.