Best Extractor Fans for Kitchens and Bathrooms (2026 UK Guide)
Most UK bathroom fans are underpowered, too loud, and fitted in the wrong position. Most kitchen extraction is undersized — because the legal minimum is much higher than buyers expect. This guide covers what actually determines whether a fan works: airflow rate in m³/h, noise at 3m in real rooms, IP rating for bathroom zones, and whether a humidistat pays for itself. The wrong fan will leave condensation on the ceiling regardless of how often it runs.
Cost & Price — What You Actually Pay
Extractor fans span a wide price range. A basic 100mm bathroom fan costs £15–£25. A quiet model with humidistat adds £20–£50 over that. Kitchen centrifugal inline fans start at £50 and reach £150+ for larger diameter units. The purchase price is rarely the dominant cost.
| Fan type | Purchase price | Installation* | Run cost/yr† |
|---|---|---|---|
| Basic 100mm bathroom fan | £15–£25 | £80–£150 | £1–£2 |
| Quiet 100mm with humidistat | £45–£80 | £80–£150 | £1–£3 |
| Kitchen centrifugal inline 150mm | £50–£150 | £150–£350 | £4–£10 |
| Wall-mounted 100mm with timer | £25–£45 | £80–£200 | £2–£4 |
*Like-for-like replacement by a Part P registered electrician in England. New circuit or extended duct runs add cost. †Running cost at 8–25W, 1–2 hours/day, 24p/kWh.
The insight most buyers miss:installation routinely costs 4–8 times the fan's purchase price. Saving £40 by choosing a £20 noisy fan over a £60 quiet one is rational only if you never hear it. You pay the same labour regardless. The annual electricity difference between an 8W and a 20W fan run 2 hours daily is under £1.25. Over 10 years, a £60 quiet fan costs less than a noisy £20 one replaced twice because it irritated you.
Hidden costs to check before ordering: a backdraft shutter prevents cold air entering when the fan is off — some models include it, others do not. If your duct run is longer than 3m or passes through more than two 90° bends, you need a higher-rated fan or an inline booster to maintain adequate airflow. A smart plug (£15.97) can add basic timer control to a fan wired on a permanent live — a practical workaround for rented properties or older installations where rewiring is not worthwhile.
Problems & Drawbacks — What They Do Not Tell You
Problem 1: Airflow drops sharply with long or tortuous duct runs
A fan rated at 90 m³/h in open air may deliver 55–65 m³/h by the time air reaches the external grille through 5m of flexible ducting with two bends. Flexible duct creates far more resistance than rigid — every metre and every bend reduces effective airflow. Standard bathroom installations with a short rigid duct to the wall will typically be fine. Loft conversions with long flexible runs, or kitchens with indirect routes to an external wall, routinely underperform. If your duct run exceeds 3m or includes more than one 90° bend, select a fan rated at least 20% above the required minimum — or use a centrifugal inline fan instead of a ceiling axial fan.
Problem 2: Noise specifications are measured in ideal conditions you will never have
Fan noise is specified at 3m in a free field — an anechoic chamber condition. A small tiled bathroom, with hard reflective surfaces on all six sides, is the opposite. The 40 dB figure on the spec sheet may feel like 50–55 dB in a reverberant bathroom. Quiet fans (rated under 30 dB free-field) remain tolerable in tiled spaces. This is most important for bathrooms adjacent to bedrooms: a fan running on a 20-minute overrun at 1am at 40 dB will wake a light sleeper through a standard UK partition wall. At 28 dB it is unlikely to.
Problem 3: Kitchen extraction is almost always undersized
UK Building Regulations Part F requires 60 l/s (216 m³/h) for extraction adjacent to a kitchen hob. A standard 100mm ceiling fan delivers 85–100 m³/h — less than half the legal minimum. Many older UK kitchens have a single 100mm fan in the ceiling installed before current regulations, or to minimise build cost. These never adequately extract cooking fumes; the correct response is to upgrade the duct diameter and fan type, not to run the existing fan longer. If your kitchen smells of last night's cooking the next morning, the extraction rate is the problem.
Problem 4: IP ratings are overlooked until it is too late
UK wiring regulations define bathroom zones. Zone 1 — inside or directly above a shower enclosure or bath to 2.25m height — requires minimum IP45. Zone 2 — within 0.6m outside the bath or shower edge — requires minimum IP44. An IP20 fan (rated for dry indoor locations only) installed above a shower is a wiring regulation violation and a potential insurance issue. Most fans sold as 'bathroom extractor fans' carry IP44 or IP45 — but verify the exact rating against your installation position rather than assuming.
Who should NOT buy a ceiling axial fan
If there is no ceiling void or accessible duct route to an external wall, a ceiling fan means significant building work. In solid-walled properties — most UK construction before 1920, including the majority of period terraces and semis — a wall-mounted fan is simpler. For ground-floor kitchens below a first floor, the duct must go up through the ceiling void to exit at the soffit, or directly through the external wall. Measure your duct route before ordering any fan.
Versus & Comparisons — The Real Choices
UK buyers face three practical decisions: basic vs. humidistat, axial vs. centrifugal, and 100mm vs. 150mm. The comparison below covers the specifications that determine whether a fan will actually fix the problem.
| Spec | Budget axial 100mm | Quiet axial 100mm (humidistat) | Centrifugal inline 150mm |
|---|---|---|---|
| Typical airflow | 85–95 m³/h | 85–100 m³/h | 180–280 m³/h |
| Noise at 3m (free field) | 40–44 dB | 25–30 dB | 35–45 dB (fan body) |
| Power draw | 8–20W | 8–12W | 40–75W |
| IP rating (typical) | IP44 | IP44–IP45 | IP44 (fan body) |
| Auto humidity control | No (switch or timer) | Yes | Optional extra |
| Long duct run performance | Poor | Poor | Good |
| Meets bathroom Part F? | Yes | Yes | Yes |
| Meets kitchen hob Part F? | No | No | Some models: check |
| Purchase price | £15–£30 | £45–£80 | £50–£150 |
Airflow at rated speed, unducted. Real-world delivery through 3–5m of 100mm flexible duct with two bends is typically 15–30% lower for axial fans.
The figure that decides:
A quiet humidistat fan costs roughly £30–£50 more than a basic switch-operated model. It activates automatically at the right moment, runs for the minimum time needed, and turns off without input. Over 10 years, the electricity premium (under £2 per year) is irrelevant. The question is whether paying £50 once for humidity sensing is preferable to manually switching on a noisy £20 fan every shower — and eventually replacing it when you grow tired of the sound.
Who Each Product Is For
No verified extractor fan product ASINs are in this site's product database, so the picks below describe the correct type and specification category. Brand examples are given for reference; specs cited are from manufacturer documentation. Where figures vary by model variant, ranges are given.
Quiet 100mm Humidistat Fan (e.g. Envirovent Silent 100HT)
Best for BathroomsA sub-28 dB fan in a tiled bathroom is near-inaudible from an adjacent bedroom. The humidistat variant activates automatically when relative humidity rises above the set threshold — typically 70–80% RH — and continues until the air clears. This means it activates when it should, and never runs longer than necessary. At 8W and 88 m³/h, it exceeds the 54 m³/h minimum required by Part F for bathrooms by a comfortable margin. A 15-minute overrun timer (separate from humidity sensing) clears residual moisture after someone leaves the room. IP45 rated, suitable for Zone 1 ceiling installation above a shower. The Envirovent Silent series is widely specified by UK contractors and holds consistent Amazon UK ratings above 4.3 stars across thousands of reviews — principally because the noise level matches the spec sheet more reliably than budget alternatives.
Avoid if: Do not use in a kitchen — 88 m³/h is under half the extraction required by Part F for hob-adjacent extraction. Also not suitable for duct runs exceeding 4m with multiple bends; centrifugal fan technology is required for those installations.
Budget 100mm Axial Fan with Timer (e.g. Xpelair DX100T)
Budget Bathroom PickThe right fan for a short duct run — under 3m, maximum one bend — in a bathroom where noise is not the primary concern: a downstairs toilet, utility room, or a family bathroom where occupancy is brief. At £20–£30, it is the lowest-cost route to meeting Part F. The timer model (typically £5–£8 more than the basic switch version) provides a configurable overrun — 15 minutes is standard — which removes residual moisture without requiring manual switch-off. At 90 m³/h, it comfortably exceeds the bathroom minimum. IP44 rated. The Xpelair DX series has been a UK specification standard for decades; parts are widely available and the grille profile fits standard UK 100mm ceiling knock-outs without adapters.
Avoid if: Do not install in a bedroom-adjacent bathroom where the fan runs at night. The 40 dB free-field rating becomes noticeably louder in a small tiled room, and will disturb a light sleeper through a standard UK partition wall. The timer version without humidistat also requires someone to remember to switch it on — a shared bathroom with inconsistent users will accumulate moisture.
Centrifugal Inline 150mm Fan (e.g. Manrose CF150S)
Best for KitchensAn inline centrifugal fan sits in the ceiling void above the kitchen, connected to the duct run, rather than on the kitchen ceiling itself. Because the fan body is remote from the room, perceived noise inside the kitchen is typically 10–15 dB lower than the fan's own rating — under 35 dB heard from inside at 3m is achievable. At 150mm diameter and up to 280 m³/h, this is the only fan category that approaches the 216 m³/h required by Part F for hob-adjacent extraction. Centrifugal impeller design handles long duct runs and multiple bends significantly better than axial fans: the pressure head is higher, so airflow delivery through a full duct system drops proportionally less. Running cost at 55W for 2 hours daily is roughly £10 per year at 24p/kWh — not a significant factor.
Avoid if: Requires access to a ceiling void for installation — not suitable for solid-ceiling ground-floor kitchens without structural work. Also requires a 150mm (6-inch) duct route to an external wall or roof; a 100mm existing duct cannot simply be swapped. Verify you can route 150mm rigid or semi-rigid duct before ordering. Installation cost is higher than a ceiling fan: budget £150–£350 for a contractor.
Wall-Mounted 100mm Fan with Timer (e.g. Silavent SDF100T)
Best for Solid WallsIn solid-walled properties — pre-1920 construction, the majority of UK period terraces and semis — a wall-mounted fan avoids the need for any ceiling void access or duct run. A single core drill through the external wall, fit the fan, connect the wiring: no flexible ducting, no ceiling access, no duct resistance reducing airflow. The timer provides configurable overrun. At 94 m³/h, it meets bathroom Part F requirements. The built-in backdraft shutter prevents cold air entering when the fan is off — essential for an external wall penetration. The SDF100T specifically is a common UK specification for exactly this scenario, and its external louvre grille is weatherproof to IP44.
Avoid if: Not suitable for an internal bathroom with no external wall. Also think carefully about the grille discharge point: a wall-mounted fan exhausting at ground level onto a public pavement is a nuisance, and moist warm air hitting a cold external wall below the damp-proof course can cause its own moisture problems. Position the grille at least 2m above ground level where possible.
Best in Class: Verdict
For most UK bathrooms with a ceiling void, a duct run under 4m, and a bedroom adjacent: buy a quiet 100mm humidistat fan — Envirovent Silent 100HT or equivalent. Sub-28 dB noise and automatic humidity sensing together address the two complaints that drive fan replacements: too loud, and no one switches it on reliably. The unit costs £55–£70 — the smallest line item in the total installation.
For kitchens: do not install a 100mm ceiling fan and expect it to meet legal requirements for hob extraction. A 150mm centrifugal inline fan is the minimum appropriate product. If you have an existing 100mm setup and cannot re-duct, accept the limitation — or plan the duct upgrade at the next kitchen renovation rather than fitting another undersized fan that will not fix the problem.
For solid-wall bathrooms and downstairs toilets without ceiling void access: a wall-mounted 100mm fan with timer is the practical choice. Core-drilling the external wall is simpler and cheaper than creating ceiling void access in a solid construction property, and the airflow performance is equivalent for a standard bathroom.
The single question that determines your fan type:
Is the installation in a bathroom or a kitchen? Bathrooms need 54 m³/h minimum — a 100mm fan of almost any type meets this. Kitchens need 216 m³/h adjacent to a hob — almost no 100mm fan meets this. The room type determines the duct diameter. Noise, humidistat, and timer are secondary decisions once the airflow requirement is confirmed.
Two Accessories Worth Having
Smart Plug (Tapo) — £15.97
For existing fans wired on a permanent live — common in older kitchens and utility rooms — a smart plug in an adjacent socket adds timer and app control without rewiring. Set a 20-minute schedule after typical shower times. Not a permanent fix, but a practical workaround for rented properties or where rewiring is disproportionate to the benefit. View on Amazon →
Coil & Fan Cleaner (Errecom Clima-Net 1L) — £15.00
Kitchen extractor fans accumulate grease on the impeller blades, reducing effective airflow by 20–40% within 12–18 months without cleaning. A foaming coil cleaner removes grease without full disassembly — spray on, let it foam, wipe clear. Annual cleaning restores rated performance and removes the grease buildup in the duct that is a recognised kitchen fire risk. View on Amazon →
Frequently Asked Questions
What size extractor fan do I need for a bathroom?
UK Building Regulations Part F requires a minimum of 15 litres per second (54 m³/h) for a bathroom. Most standard 100mm fans deliver 85–100 m³/h, which comfortably meets this. If your bathroom has a separate shower enclosure or is larger than 8m², go for a model rated at 100 m³/h or above.
What is the minimum extraction rate for a UK kitchen?
Part F requires 60 litres per second (216 m³/h) for kitchen extraction adjacent to a hob, or 30 litres per second (108 m³/h) elsewhere in the kitchen. A standard 100mm bathroom fan will not meet this. Kitchens need 150mm fans or purpose-built range extraction at a minimum.
Do I need a humidistat fan in my bathroom?
A humidistat fan senses relative humidity and switches on automatically when it rises above a set threshold — typically 70–80% RH. This is more effective than a timer because it runs exactly as long as needed. The main downside is cost: expect to pay £15–25 more than a basic model. For a shower room used by multiple people, the automatic operation is worth it.
How loud is an extractor fan in dB?
Budget bathroom fans typically run at 40–44 dB(A) measured at 3m in a free field — similar to a library or quiet conversation. Quiet models run at 25–30 dB, which is near-inaudible from an adjacent room. Note that a small tiled bathroom is highly reverberant: real-world noise will be louder than the free-field spec. If noise matters, look for models specifying under 30 dB.
Can I fit an extractor fan myself?
Fitting a like-for-like replacement in the same position is a DIY job for a competent homeowner: it involves low-voltage wiring and is classed as minor electrical work in England and Wales. In Scotland, all electrical work in bathrooms must be notified to Building Control. If you are extending a duct, moving the fan position, or installing a new circuit, a Part P registered electrician is required.
What IP rating does an extractor fan need for a bathroom?
UK wiring regulations define bathroom zones. Zone 1 — directly inside or above a shower or bath to 2.25m height — requires IP45 minimum. Zone 2 — within 0.6m of the bath or shower edge — requires IP44. Outside these zones, most ceiling positions in a standard bathroom have no minimum requirement, but IP44 is sensible given the damp environment. Check the fan's exact IP rating against your installation position before fitting.