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The best air purifiers for bedrooms, quiet enough to sleep with

Six air purifiers compared for a bedroom: how quiet each is on its lowest setting, whether its lights go off, and whether it cleans enough air for the room.

Updated

Short answer

The Coway Airmega 150 is the bedroom purifier we would pick for most people. Coway rates its Silent mode at 20 dB, it is on Quiet Mark’s UK list, and its CADR covers a bedroom of about 23 m² by our rule. The Philips AC2220 quotes an even lower 13 dB and can switch every light off; the Levoit Core 300S is the one to choose if you want app schedules.

Best for bedroomsCoway Airmega 150 (AP-1019C)
£149.99
Check price at Coway (opens in a new tab)

A bedroom purifier has a different job from the one downstairs. It runs for hours while you sleep, usually on its lowest setting and often close to the bed. So we ranked these six on what matters at night: how quiet each one is on its lowest setting, whether its lights go dark, and whether it moves enough air for a typical bedroom of 10 to 15 m². Filter life and power on low came next. All six are in our air purifier comparison, where the purifiers for bedrooms and small rooms have their own filter.

Our picks at a glance

Side by side

Six bedroom air purifiers compared on noise, CADR, filter life and power. Best in each row is shaded, bold and ticked
Specification Coway Airmega 150 (AP-1019C) Philips PureProtect Quiet 2200 Series (AC2220/10) Levoit Core 300S Blueair Blue Max 3250i Dyson HushJet Purifier Compact (HJ10) Philips 600i Series Air Purifier (AC0650/20)
Price £149.99 £229.99 £149.99 £169 £323.19–£349 £99.99
Noise at lowest setting 20 dB(A) 13 dB(A)(best in this row) 24 dB(A) 18 dB(A) 24 dB(A) 19 dB(A)
Clean air delivery rate (CADR) 281 m³/h 420 m³/h(best in this row) 258 m³/h 239 m³/h not listed 170 m³/h
Filter life (maker's estimate) 12 months 36 months 6 months 6 months 60 months(best in this row) 12 months
Power at top speed 35 W 28 W 39 W 20 W 19 W 12 W
Our score Our score: 8.2 out of 10 Our score: 8.5 out of 10(best in this row) Our score: 8.1 out of 10 Our score: 7.9 out of 10 Our score: 7.7 out of 10 Our score: 7.4 out of 10

Read the noise figures with some care: Philips gives sound pressure measured 1.5 m away, while Coway, Blueair, Levoit and Dyson don’t say how or where they measured on the pages we read. Dyson publishes no CADR for the HushJet. Only Philips names a test standard for its CADRs, the Chinese GB/T 18801. The “recommended room size” on the cards and spec tables is each maker’s own figure, based on different air-change rates, so the room sizes in our text use one rule for all: CADR ÷ 12.

Best for bedrooms

1. Coway Airmega 150

Clean air delivery rate (CADR)
281 m³/h
Recommended room size
29 m²
Noise at lowest setting
20 dB(A)
Main filter
HEPA-type (class not stated)
Filter life (maker's estimate)
12 months
Replacement filter
Airmega 150 Filter Set (3109700)

The Airmega 150 is built around the night. Coway rates its Silent mode at 20 dB and suggests Silent rather than Auto for sleeping, because Auto can speed the fan up when the sensor reading changes. It is the only one of these six we have confirmed on Quiet Mark’s UK list. Its 281 m³/h CADR (Coway names no test standard) covers about 23 m² by our rule, more than most bedrooms need, and it draws 2.9 W on its lowest setting. Both main filters last about a year, and the pre-filter slides out for washing. The catches: no app, remote or timer, and it wants 20 cm of clear space on every side.

Pros

  • On Quiet Mark's UK list; Coway rates its quietest mode at 20 dB
  • CADR of 281 m³/h, enough for about 23 m² at five air changes an hour
  • Carbon and HEPA filters both last about 12 months: one change a year

Cons

  • No app, remote or timer
  • Coway doesn't give the filter a HEPA class (H13 or H14)

Where to buy the Coway Airmega 150 (AP-1019C)

Prices and stock change; the retailer’s page is always the final word.

Best overall

2. Philips AC2220

Clean air delivery rate (CADR)
420 m³/h
Recommended room size
109 m²
Noise at lowest setting
13 dB(A)
Main filter
HEPA-type (class not stated)
Filter life (maker's estimate)
36 months
Replacement filter
FY2200/30

The PureProtect Quiet 2200 is our best overall air purifier, and a very good bedroom one. Philips quotes 13 dB on its lowest setting, the lowest figure of any purifier we list. It can switch every light off. Its 420 m³/h CADR is the most of the six on paper, about 35 m² by our rule, so it suits a large bedroom or one that doubles as a study. Philips rates the FY2200 filter for about three years. The catches: it stops running if you ignore the replacement alert, and its particle sensor wants a clean every two months. See also Levoit Core 300S vs Philips AC2220.

Pros

  • 420 m³/h CADR (GB/T 18801-2022), enough for most living rooms
  • Philips rates its FY2200 filter for about three years
  • 13 dB on its lowest setting (at 1.5 m), the lowest figure we list

Cons

  • Stops running if the filter alert is ignored, until a new filter is reset
  • Particle sensor needs a clean with a cotton swab every two months

Where to buy the Philips PureProtect Quiet 2200 Series (AC2220/10)

Prices and stock change; the retailer’s page is always the final word.

Best smart purifier

3. Levoit Core 300S

Clean air delivery rate (CADR)
258 m³/h
Recommended room size
54 m²
Noise at lowest setting
24 dB(A)
Main filter
HEPA-type (class not stated)
Filter life (maker's estimate)
6 months
Replacement filter
Core 300-RF

The Core 300S is the pick if you want to run a bedroom purifier from your phone. The VeSync app adds schedules, a timer and a Quiet Auto mode that reacts to the air but never uses the top speed. Sleep mode turns the display lights off and slows the fan. Levoit’s manual gives 24 dB at its quietest; its UK page says 22 dB. The 258 m³/h CADR covers about 21 m² by our rule (Levoit’s own 54 m² assumes two air changes an hour), and it takes pet allergy and toxin absorber filters as well as the standard one. The catches: the filter is due every six to eight months, Levoit names no HEPA class, and it wants 38 cm of space on all sides.

Pros

  • CADR of 258 m³/h from a 36 cm cylinder that weighs 2.7 kg
  • Laser dust sensor drives auto mode; the app adds Quiet and Efficient modes
  • Takes the Core 300-RF original, pet allergy and toxin absorber filters

Cons

  • Filter is due every six to eight months, more often than yearly rivals
  • No HEPA class stated; Levoit quotes 99.97% for 0.1 to 0.3 µm particles

Where to buy the Levoit Core 300S

Prices and stock change; the retailer’s page is always the final word.

Also worth a look: stands anywhere in the room

4. Blueair Blue Max 3250i

Clean air delivery rate (CADR)
239 m³/h
Recommended room size
20 m²
Noise at lowest setting
18 dB(A)
Main filter
Electrostatic (HEPASilent and similar)
Filter life (maker's estimate)
6 months
Replacement filter
110410

The Blue Max 3250i is sized for a bedroom: Blueair recommends it for about 20 m² at 4.8 air changes an hour, which matches its 239 m³/h CADR (Blueair names no test standard). It quotes 18 dB on its lowest speed and has a Night mode, and because it draws air in all round, Blueair says it can stand anywhere in the room. Of the 16 owner reviews we read, five mention how quietly it runs, two of them at night; one owner found the Wi-Fi kept dropping out. The catches: the spec table says change the filter every six months (the filter page says up to nine), and we found no UK manual.

Pros

  • 239 m³/h CADR for smoke, dust and pollen on Blueair's UK page
  • 18 dB on its lowest speed, with a night mode
  • Washable fabric pre-filter, sold in several colours

Cons

  • Blueair's spec table says change the filter every six months
  • HEPASilent filter combines electrostatic and mechanical stages; no HEPA class

Where to buy the Blueair Blue Max 3250i

Prices and stock change; the retailer’s page is always the final word.

Also worth a look: bedside size

5. Dyson HushJet Purifier Compact

Recommended room size
100 m²
Noise at lowest setting
24 dB(A)
Main filter
Electrostatic (HEPASilent and similar)
Filter life (maker's estimate)
60 months
Activated carbon (odours, gases)
Yes
Air-quality sensor
Particle (PM2.5)

The HushJet Purifier Compact (HJ10) is 47 cm tall and 3.15 kg, sized for a bedside table or desk. Dyson quotes 24 dB in night mode and 41 dB on maximum; sleep mode drops the fan to speed 4 and dims the screen. Dyson publishes no CADR for it: its coverage claim rests on its own test in an 81 m³ room at the maximum setting, so we can’t size it against the others (the 100 m² in its spec table comes from UK retailer listings and gives no air-change rate). The main filter is electrostatic, not a classed HEPA filter. Dyson tested it at 99.97% of particles down to 0.3 microns and says it keeps performing for about five years at 12 hours a day, with a separate carbon filter inside it. The catch: the UK listings we read give no filter part numbers.

Pros

  • Dyson quotes 24 dB in night mode and 41 dB at maximum
  • Dyson rates the main filter for about five years at 12 hours a day
  • Activated-carbon filter inside the main filter, for odours

Cons

  • Electrostatic filter, not a classed HEPA filter
  • No CADR published; Dyson's coverage test used an 81 m³ room

Where to buy the Dyson HushJet Purifier Compact (HJ10)

Prices and stock change; the retailer’s page is always the final word.

Also worth a look: smallest rooms

6. Philips AC0650

Clean air delivery rate (CADR)
170 m³/h
Recommended room size
44 m²
Noise at lowest setting
19 dB(A)
Main filter
HEPA-type (class not stated)
Filter life (maker's estimate)
12 months
Replacement filter
FY0611/30

The Philips 600i (AC0650) is the smallest and simplest purifier here, a 34 cm cylinder of 2.2 kg. Its 170 m³/h CADR, to GB/T 18801, covers about 14 m² by our rule: right for a small bedroom, not much more. Philips quotes 19 dB on Sleep, where the display dims to its lowest brightness rather than switching off. There is no air-quality sensor or auto mode, so you choose the speed or set a schedule in the Air+ app. The FY0611 filter lasts about a year but has no carbon layer, and, like the AC2220, the purifier stops running if you ignore the replacement alert.

Pros

  • 170 m³/h CADR (GB/T 18801) from a 2.2 kg, 34 cm cylinder
  • 19 dB(A) on its lowest setting and 12 W at most
  • Air+ app adds schedules and remote control

Cons

  • No air-quality sensor, so no auto mode: you choose the speed
  • No activated carbon layer, so little help with cooking smells

Where to buy the Philips 600i Series Air Purifier (AC0650/20)

Prices and stock change; the retailer’s page is always the final word.

How to choose a quiet air purifier for a bedroom

Noise on the lowest setting

A purifier that is too small for the room has to run fast, and a fast purifier is a loud one. For scale, a comparison of six HEPA air cleaners cited in the government’s 2020 SAGE-EMG paper on air cleaning measured 27 to 35 dBA at their lowest airflow, and the building regulations guidance (Approved Document F) limits continuous ventilation in bedrooms to 30 dBA. The makers’ figures for these six, from 13 to 24 dB, all sit below that range, and most makers don’t say how they measured. Use the figures to rank models, not as a promise of what you will hear from the pillow.

Lights at night

  • Philips AC2220: a light sensor dims or switches off the panel in the dark, and one button turns every light off.
  • Levoit Core 300S: sleep mode turns the display lights off; a display-off button does the same in other modes.
  • Coway Airmega 150: one button turns off the four-colour air-quality light; the manual doesn’t mention the other indicators.
  • Dyson HushJet Compact: sleep mode dims the screen.
  • Philips AC0650: Sleep turns the display down to its lowest brightness, not off.
  • Blueair Blue Max 3250i: the app has a display lock, but Blueair’s UK page doesn’t say whether Night mode dims the lights.

Enough air for a small bedroom

Our rule of thumb: a room’s floor area in m² is roughly the CADR in m³/h divided by 12, which is about five air changes an hour under a 2.4 m ceiling. So a 10 m² bedroom needs a CADR of about 120 m³/h and a 15 m² bedroom about 180 m³/h. Every model here with a published CADR clears the first; the AC0650 falls just short of the second. Some brand room sizes look bigger because they assume fewer air changes. And a CADR is measured on top speed only, so it says nothing about the sleep setting: a purifier with more CADR than the room needs leaves room to run a lower, quieter speed. More in what size air purifier you need.

Quiet Mark

Quiet Mark is a UK certification for roughly the quietest 10 to 20 per cent of comparable products that also perform well. For purifiers it judges the loudest readings across the modes and the character of the sound, not a single decibel figure, and it re-evaluates each category every year. Its list is set by market, so check it shows the UK. Of these six, the Coway Airmega 150 is the only one we have confirmed on the UK list.

Power on low, for overnight running

Of these six, only Coway gives a lowest-setting power figure on the pages we read: 2.9 W, about 0.02 kWh over an eight-hour night, or about 8.5 kWh over a year of nights. The others give top-speed power only, which sets a ceiling: eight hours flat out uses about 0.1 kWh on the AC0650 (12 W) and 0.31 kWh on the Levoit (39 W), the lowest and highest here. Multiply by your own tariff; on a low setting the real figure is smaller. Filters add to the running cost too, from about every three years on the AC2220 to every six months on the Blueair. See what an air purifier costs to run and replacement filters explained.

Ionisers and ozone

The two Philips models and the Coway list no ioniser in their manuals, and Levoit says its purifiers use no negative ions. Blueair’s HEPASilent filter charges particles before a mechanical filter catches them, and the Dyson uses an electrostatic filter; the UK pages we could read for those two don’t say whether they produce any ozone. The SAGE-EMG paper did not recommend ionisers and similar devices unless their safety is proven.

If you are buying for hay fever

A purifier can catch pollen-sized particles from the bedroom air, but it is not a treatment, and pollen that has settled on bedding, clothes and hair stays there until it is disturbed back into the air. Read what the NHS and Allergy UK say about air purifiers and hay fever, and talk to a pharmacist or GP about symptoms.

What each budget buys

  • Under £150: small, quiet purifiers with enough CADR for a typical bedroom. Some skip the air-quality sensor, auto mode or carbon layer.
  • £150–£300: particle sensors, auto modes, apps, longer-life filters and enough CADR for a large bedroom or a living room.
  • Above £300: compact design-led models and machines that also heat, cool or humidify. For a bedroom, the extra spend buys looks and features rather than a quieter lowest setting.

Buying for a living room or the whole downstairs? See the best air purifiers in the UK.

How we chose these

  1. Started from what decides a bedroom purifier: noise on the lowest setting, whether the lights go off, enough CADR for a 10 to 15 m² room, and how often the filter needs changing.
  2. Compared published specs and manuals for the 16 air purifiers we track, not marketing claims, and checked Quiet Mark’s UK list.
  3. Read owner reviews where enough independent UK ones exist; for this list, only the Blueair. They are anecdotes from a small sample, not failure rates.
  4. Checked prices at the brand stores, John Lewis, Hughes and Marks Electrical, and show the date we checked.
  5. Revisit the list when prices move or a model is replaced.

What we don’t do: lab-test purifiers or measure their noise ourselves. The decibel figures are the makers’ own.

Our full method

Bedroom air purifier questions

Is it OK to leave an air purifier on all night?

Yes, if the maker’s instructions allow it. Allergy UK says running a purifier continually, as the maker instructs, can help reduce airborne allergens. Power use on low is small: the Coway Airmega 150 draws 2.9 W on its lowest setting, about 0.02 kWh a night. Keep the clearance its manual asks for, and keep airing the room, because a purifier brings in no fresh air.

How many decibels is quiet enough to sleep with?

There is no official figure for purifiers, but 30 dBA is a useful marker: it is the limit the building regulations guidance sets for continuous ventilation in bedrooms. Every pick here quotes 24 dB or less on its lowest setting. Brands measure in different ways, so treat the figures as a guide to which models are quieter, and avoid an auto mode that speeds up at night.

Should I use auto mode overnight?

Only if it stays quiet. Coway suggests Silent mode for sleeping on the Airmega 150, because Auto can speed the fan up as readings change. Levoit’s app has a Quiet Auto mode that never uses the top speed. If a fan speeding up would wake you, choose a fixed low setting or a quiet auto mode at night.

Where should I put an air purifier in a bedroom?

On the floor or a stable surface, with space around it and nothing blocking the vents. Coway asks for 20 cm on every side, 2 m from a TV and not high up; Philips asks for 20 cm around and 30 cm above; Levoit wants 38 cm on all sides. Blueair says the 3250i can stand anywhere because it draws air in all round.

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Published by AMCD Solutions

We research every product from manufacturers’ published specs, retailer listings and owner reviews. Pages are drafted with the help of AI tools, then checked against those sources and edited before they go live, and prices are rechecked regularly. We don’t lab-test products, and we say so.

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