How do I choose the right fan size and flow rate for my bathroom?

For most small bathrooms and cloakrooms a 100mm axial fan is the common choice, with many models offering flow rates around 21–25 litres per second which is adequate for typical use. If you have a larger family bathroom or an en suite with a shower you may prefer a 150mm model or a fan with a higher flow rate (some products list 30–75 l/s) to clear moisture faster. Match the flow rate to the room volume such as a small ensuite (2–3 m³) will be fine with a 100mm, whereas a larger bathroom (6–10 m³) benefits from the extra capacity of a larger fan. Also check noise and control type so the higher flow doesn't become disruptive.

Why choose an axial extractor fan rather than an inline fan?

Axial fans are designed to be mounted directly in an external wall, so they need much less power and are ideal when you only have a short duct run, typically no more than 2–3 metres. If your external wall is close to the bathroom an axial fan gives efficient removal with simpler installation and lower running costs. If you must run air through long ducts or several bends, an inline fan would be better, but for direct wall-to-outside ventilation axial is the simplest and most economical solution.

Which control type should I pick: timer, humidistat, continuous or motion sensor?

Pick a humidistat & timer model if you want automatic humidity control that runs until the room dries, great for family bathrooms with frequent showers. Continuous or continuous+timer units are useful if you prefer constant background ventilation to prevent mould, while motion-sensor fans are handy in cloakrooms or quick-use en suites where you want instant operation. Smart WiFi models give remote control and scheduling, but if you simply want low-maintenance humidity control the humidistat & timer combination is often the most practical.

How noisy are these axial fans and which models are best for a quiet bathroom?

Noise levels vary widely across the range, from very quiet models down to around 12 dB up to models in the 30–40 dB region; product listings show specific dB figures for comparison. Look for lines labelled "Silent" or "QuietAir" such as Vent‑Axia Silent, Xpelair Simply Silent or Airflow QuietAir if noise matters, as they're engineered to run quietly at typical bathroom flows. Remember that higher flow generally produces more noise, so choose a quiet model with sufficient flow rather than the most powerful fan available.

Can I fit an axial fan near the shower (Zone 1) and what should I check on the product?

Many axial models in the range are rated for Zone 1 use, the catalogue shows a number of products listed as Zone 1 compatible, so you can place them near the shower provided the model is specifically marked as such. When shopping, confirm the model's bathroom zone rating and look for appropriate IP/zone suitability in the product details; a Zone 1 rating ensures the fan meets the safety requirements for that area. If you have a shower directly adjacent to the fan, pick a Zone 1 model with a timer or humidistat to manage steam efficiently.

Bathroom Fans - Axial (Connect to External Walls)

Axial bathroom extractor fans are usually installed within an external wall so the requirement to move air over long distances isn’t required. They generally require much less power to operate and should on be ducted for no more than 2 to 3 metres. Our range of axial fans is broken down into brands for ease of browsing including Linear, Xpelair, Manrose, Vent-Axia and Greenwood Airvac. Within these brands we’ve got something to suit every budget and every bathroom no matter the style so you’ll have a mist free suite before you know it.

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Xpelair Simply Silent DX100BS 100mm Standard Square Extractor Fan

Xpelair Simply Silent Standard Square Extractor Fan 100mm - DX100BS

4.9

7 ratings

£31.52 inc
VAT

Xpelair Simply Silent DX100BTS 100mm Square Extractor Fan with Timer

Xpelair Simply Silent Timer controlled Square Extractor Fan 100mm - DX100BTS

4.9

29 ratings

£29.86 inc
VAT

Save £5.72 | Was £35.58

Xpelair Simply Silent DX100S 100mm Standard Square Extractor Fan with Kit

Xpelair Simply Silent Extractor Fan with fitting kit 100mm - DX100S

4.8

10 ratings

£32.00 inc
VAT

Xpelair Simply Silent DX100TS 100mm Square Extractor Fan with Timer with Kit

Xpelair Simply Silent Timer controlled Square Extractor Fan with fitting kit 100mm - DX100TS

4.8

6 ratings

£39.94 inc
VAT

Xpelair Simply Silent DX100HTS 100mm Square Extractor Fan with Timer and Humidistat with Kit

Xpelair Simply Silent Timer and Humidistat Square Extractor Fan with Fitting kit 100mm - DX100HTS

4.8

11 ratings

£48.99 inc
VAT

Save £5.86 | Was £54.85

Xpelair Simply Silent DX100TR 100mm Round Extractor Fan with Timer with Kit

Xpelair Simply Silent Timer controlled Round Extractor Fan with fitting kit 100mm - DX100TR

5.0

4 ratings

£39.94 inc
VAT

Xpelair Simply Silent DX150TS 150mm Square Extractor Fan with Timer

Xpelair Simply Silent Timer controlled Square Extractor Fan 150mm - DX150TS

5.0

5 ratings

£60.80 inc
VAT

Xpelair Simply Silent DX150HTS 150mm Square Extractor Fan with Timer and Humidistat

Xpelair Simply Silent Timer and Humidistat Square Extractor Fan 150mm - DX150HTS

5.0

7 ratings

£74.95 inc
VAT

Save £11.37 | Was £86.32

Xpelair Simply Silent LV100HTS 100mm Low Voltage Square Extractor Fan

£43.84 inc
VAT

Save £18.67 | Was £62.51

Manrose Timer Controlled Extractor Fan 100mm - XF100T

5.0

9 ratings

£24.74 inc
VAT

xpelair-simply-silent-contour-timer-and-humidistat-controlled-with-interchangable-facsia-extractor-fan-100mm-c4htrs

Xpelair Simply Silent Contour Timer and Humidistat Extractor Fan 100mm - C4HTRS

4.8

26 ratings

£70.43 inc
VAT

vent-axia-silent-variable-speed-standard-extractor-fan-100mm-vasf100bv

£88.04 inc
VAT

vent-axia-silent-continuous-running-humidistat-timer-controlled-100mm-extractor-fan-vasf100htc

Vent-Axia Silent Continuous Running Bathroom Extractor Fan 100mm - Humidistat & Timer 479089

4.8

4 ratings

£126.52 inc
VAT

Save £16.48 | Was £143.00

vent-axia-silent-switch-operation-100mm-extractor-fan-vasf100b

Vent-Axia Silent Bathroom Extractor Fan 100mm - Basic 446658B

5.0

8 ratings

£58.92 inc
VAT

vent-axia-silent-extractor-fan-timer-controlled-100mm-extractor-fan-vasf100t

Vent-Axia Silent Bathroom Extractor Fan 100mm - Timer 446659B

4.7

10 ratings

£69.84 inc
VAT

vent-axia-silent-timer-and-humidistat-controlled-100mm-extractor-fan-vasf100ht

Vent-Axia Silent Timer & Humidistat Controlled Bathroom Extractor Fan 100mm - 477436B

4.5

4 ratings

£104.40 inc
VAT

manrose-quiet-timer-and-humidistat-controlled-100mm-extractor-fan-cqf100h

Manrose Quiet Humidistat Controlled 100mm Extractor Fan - CQF100H

£63.86 inc
VAT

Manrose Silent standard 100mm Extractor Fan - CSF100S

5.0

2 ratings

£47.58 inc
VAT

xpelair-simply-silent-contour-pull-cord-controlled-round-square-extractor-fan-100mm-c4tsr

Xpelair Simply Silent Contour Timer controlled Extractor Fan 100mm - C4TSR

4.9

17 ratings

£47.87 inc
VAT

Xpelair Simply Silent Contour Extractor Fan 100mm - C4SR

4.9

11 ratings

£43.54 inc
VAT

airflow-quietair-qt100-black-edition-b-axial-extractor-fan

£111.16 inc
VAT

Airflow iCON 15 100mm Extractor Fan - 72683501

4.9

7 ratings

£64.48 inc
VAT

Airflow Aria Motion Sensor and Timer controlled Extractor Fan 100MST - 90000690

4.7

3 ratings

£55.44 inc
VAT

Airflow Aria Quiet 100mm Humidty and Timer controlled Extractor Fan - 90001050

£70.24 inc
VAT

Airvent Timer Controlled Extractor Fan 100mm - 457086A

£23.99 inc
VAT

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Bathroom Fans - Axial (Connect to External Walls)

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Xpelair Simply Silent Standard Square Extractor Fan 100mm - DX100BS

Xpelair Simply Silent Timer controlled Square Extractor Fan 100mm - DX100BTS

Xpelair Simply Silent Extractor Fan with fitting kit 100mm - DX100S

Xpelair Simply Silent Timer controlled Square Extractor Fan with fitting kit 100mm - DX100TS

Xpelair Simply Silent Timer and Humidistat Square Extractor Fan with Fitting kit 100mm - DX100HTS

Xpelair Simply Silent Timer controlled Round Extractor Fan with fitting kit 100mm - DX100TR

Xpelair Simply Silent Timer controlled Square Extractor Fan 150mm - DX150TS

Xpelair Simply Silent Timer and Humidistat Square Extractor Fan 150mm - DX150HTS

Xpelair Simply Silent 100mm LV100HTS Timer & Humidistat Extractor Fan with Fitting Kit - Square

Airflow QuietAir QT100 Black Edition HT Axial Extractor Fan

Manrose Silent Timer Controlled 100mm Extractor Fan - CSF100T

Manrose Timer Controlled Extractor Fan 100mm - XF100T

Xpelair Simply Silent Contour Timer and Humidistat Extractor Fan 100mm - C4HTRS

Vent-Axia Silent Variable Speed Bathroom Extractor Fan 100mm - Basic 479085

Airflow QuietAir QT100 Black Edition T Axial Extractor Fan

Vent-Axia Silent Bathroom Extractor Fan 100mm - Humidistat & Timer 479087

Vent-Axia Silent Continuous Running Bathroom Extractor Fan 100mm - Timer 479088

Vent-Axia Silent Continuous Running Bathroom Extractor Fan 100mm - Humidistat & Timer 479089

Vent-Axia Silent Bathroom Extractor Fan 100mm - Basic 446658B

Vent-Axia Silent Bathroom Extractor Fan 100mm - Timer 446659B

Vent-Axia Silent Timer & Humidistat Controlled Bathroom Extractor Fan 100mm - 477436B

Manrose Quiet Humidistat Controlled 100mm Extractor Fan - CQF100H

Manrose Silent standard 100mm Extractor Fan - CSF100S

Xpelair Simply Silent Contour Timer controlled Extractor Fan 100mm - C4TSR

Xpelair Simply Silent Contour Extractor Fan 100mm - C4SR

Airflow QuietAir QT100 Black Edition B Axial Extractor Fan

Airflow QuietAir Timer controlled 100mm Extractor Fan - 9041260

Airflow QuietAir Motion Sensor and Timer controlled 100mm Extractor Fan - 9041262

Airflow iCON 30 100mm Extractor Fan - 72591601

Airflow iCON 15 100mm Extractor Fan - 72683501

Airflow Aria Motion Sensor and Timer controlled Extractor Fan 100MST - 90000690

Airflow Aria Quiet 100mm Humidty and Timer controlled Extractor Fan - 90001050

Airvent Timer Controlled Extractor Fan 100mm - 457086A

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