Want to keep your home fresh, dry, and free from that stubborn condensation on your windows? An extractor fan is one of the simplest, smartest upgrades you can make! Whether you're battling steamy showers, cooking vapours, or damp from drying laundry indoors, this guide walks you through everything you need to know. Let's clear the air!
An extractor fan, sometimes called a ventilation fan, is a clever little device that removes excess moisture and odours from your home. It works by pulling stale, humid air out of the room and pushing it outside, leaving fresh air behind.
You'll usually find them in bathrooms, kitchens, and utility rooms — anywhere steam, damp, or smells tend to build up. In a bathroom, for example, the fan sits high on the wall or ceiling, where heat and moisture naturally rise. The result? Less condensation, no musty smells, and a real defence against mould. For UK homes dealing with wet weather and indoor laundry drying, that's a genuine gamechanger.
Types of Extractor Fans
Not all fans are the same, so let's break down the three main types.
Axial Extractor Fans are the most common choice. They pull air through an impeller and straight out through a hole in an external wall. They're brilliant for bathrooms and smaller rooms where the ducting run is short (around 2–3 metres). Take a look at the Devola bathroom extractor fan range to see these in action.
Centrifugal Extractor Fans shift air at right angles and spin it outward with real force. This means they can move more air over longer ducting runs — perfect for rooms that need a bit more oomph.
Inline Extractor Fans sit tucked away in your ceiling or loft space. They're wonderfully quiet and ideal for rooms without an external wall, or where you'd rather not have a visible fan on show. You'll need a little extra kit — ducting, clamps, and grilles — but the near-silent performance is worth it! Browse the Devola inline extractor fan collection to find your match.
Where Should I Put My Extractor Fan?
Start by spotting the rooms that struggle most with damp or odours. Your bathroom is usually the biggest culprit, thanks to those lovely hot showers! Opening a window helps a little, but it's hardly practical (or cosy) in a British winter. A well-placed extractor fan is the permanent fix.
Bathroom Zones
Bathrooms are split into zones, and each one has safety rules around water and electrics. Here's the simple version:
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Zone 0 — inside the bath or shower itself. Any fitting here must be low voltage and rated at least IP67.
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Zone 1 — the area above the bath or shower, up to 2.25 metres from the floor. You'll want a minimum of IP45 here, though IP65 is even better.
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Zone 2 — the space 0.6 metres out from Zone 1, up to 2.25 metres high. A rating of at least IP44 is needed.
Where your fan goes depends on your room's size and layout. Always check with a qualified electrician — they'll make sure it's fitted safely and meets UK regulations. Peace of mind, sorted!
Installing an Extractor Fan
Feeling handy? Some Devola fan kits are designed with confident DIYers in mind. That said, anything wired into the mains — especially in a bathroom — really should be fitted by a qualified electrician. It keeps you safe, keeps you compliant, and saves you the headache of costly mistakes.
Once it's in, you'll enjoy fresher air, less moisture, and a home that's far kinder to breathe in. Now that's worth celebrating!
Fan Size Considerations
Choosing the right power level is easier than it sounds. If you're replacing an existing fan, simply match the hole size. But if you're renovating, a little maths goes a long way!
First, measure your room's height, width, and length in metres. Say your bathroom is 3m long, 2.5m wide, and 2.4m high:
3 × 2.5 × 2.4 = 18m³ (your room volume)
Bathrooms need at least four air changes an hour, so:
18m³ × 4 = 72m³/h (your minimum extraction rate)
Here's a friendly tip: pick a fan slightly more powerful than the bare minimum. A stronger fan clears the air faster, so you only need to run it for around 15 minutes — roughly the length of a shower! Sometimes extraction is measured in litres per second (l/s) too, so don't worry if you spot both figures on a product page.
Which Extractor Fan Size Is Best For My Room?
Every space has its sweet spot. Here's a quick guide.
Bathroom — Daily showers create plenty of steam, so a quiet, efficient fan is ideal. The Devola bathroom extractor fan range has options to suit family homes of all sizes.
Kitchen — Cooking throws out heat, grease, and smells, so you'll want a fan with a higher extraction rate to keep things fresh.
Shower — Showers are moisture central! An all-in-one kit makes life easy. Explore the Devola extractor fan kits for a fuss-free solution.
How to Choose the Right Extractor Fan for You
A few final things to weigh up before you buy:
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Hole size — When replacing a fan, the existing hole usually sets the size. Check compatibility to avoid extra fitting costs.
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How you switch it on — Options include a pullcord, a PIR sensor that detects movement, or a humidistat that reacts automatically to moisture in the air.
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Noise levels — Prefer a peaceful home? Look for a low decibel rating so the fan won't disturb nap times, early starts, or quiet evenings.
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Timer — A handy run-on timer keeps the fan going for a few minutes after you leave, then switches off to save energy.
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Humidistat — This smart feature turns the fan on and off based on humidity, so your room stays dry without you lifting a finger.
Shower Extractor Fans and Fan Kits
If your shower is the main source of steam, a complete kit is the easy answer. The Devola Shower Fan Light Kit (DVSFK100TLED) brings together an LED light, inline fan, ducting, and all the fittings you need in one tidy package. Light on, steam gone — with effortless run-on control. Simple!
Our Recommendations
Ready to shop? Here are our favourites, trusted by thousands of UK homes.
Best inline choice: The Devola Inline Extractor Fan with Timer (DVILF100T) delivers powerful, discreet moisture removal with a built-in run-on timer. Quiet, tucked away, and seriously effective.
Best for bathrooms: Explore the full Devola bathroom extractor fan range for quiet, energy-saving fans that banish steam and damp fast.
Best all-in-one kit: The Devola Shower Fan Light Kit (DVSFK100TLED) is perfect for a hassle-free upgrade.
Don't forget the accessories: Finish the job neatly with Devola 100mm PVC Flexible Ducting (DVFD100/3) for smooth, efficient airflow.
Energy-efficient, ultra-quiet, and beautifully designed — Devola fans cost just pennies to run while protecting your home from the far greater cost of damp and mould. An environmentally smart choice your whole family will appreciate!
Ready to breathe easier?
Shop the full Devola extractor fans collection and find the perfect fit for your home today!
