Which air purifier is quietest for a bedroom?
No label settles it. The lowest figures are the IQAir Atem Desk at 20 dB(A), the Blueair Blue Pure 511 at 22 dB in its FAQ (24 dB in its spec table), and the Blueair Blue Pure 311i Max and Levoit Vital 200S-P at 23 dB12611. The Alen BreatheSmart 45i, Coway Airmega Mighty and Levoit Core 300-P say 24 dB, and the Rabbit Air MinusA2 says 25.6 dBA491518.
IQAir’s 20 is a sound power figure, which is a different measure from the others, so it isn’t a like-for-like win11. The rest sit within about 4 dB of each other on a low setting that may clean a room only slowly. A purifier that is quiet on low but needs high to clean your room is not quiet where it counts, so read the noise next to the room size.
Austin Air publishes no noise figure. Winix publishes none for the 5500-2, which is discontinued, though its current 5520 lists 23.5 dB2325. Prices are US prices on each maker’s page, checked Nov 6, 2026.
- Choose the Blueair Blue Pure 511 if you have a small bedroom and want the lowest price at $99.99, and can accept that its page gives two different noise ranges1.
- Choose the Blueair Blue Pure 311i Max if you want 23 dB on low in a bedroom up to 439 ft² with app control, and can accept 50 dB on high and filters near $90 a year229.
- Choose the Levoit Vital 200S-P if you want a 23 dB low end in a room up to 388 ft², and can accept a 54 dB top and no per-speed figures67.
- Choose the Levoit Core 300-P if you want a low price at $104.99 for a room up to 222 ft², and can accept a 54.5 dB top and no per-speed figures34.
- Choose the Coway Airmega Mighty if you want a bedroom unit rated to 361 ft² with a timer and a dust sensor, and can accept a range of 24 to 53 dB(A) with nothing in between9.
- Choose the IQAir Atem Desk if you want quiet, filtered air aimed at one person at a desk or bedside, and can accept a $399.99 price and a rating of up to 150 ft²1113.
- Choose the Alen BreatheSmart 45i if you want a slim panel unit for a medium to large bedroom with a 24 dB low speed, and can accept $449 and filters at $69 to $99 each1517.
- Choose the Rabbit Air MinusA2 if you want a unit for a room near 280 ft² and can pay $599.95, and accept that its lowest speed is 25.6 dBA1819.
- Skip the Austin Air HealthMate and the Winix 5500-2 if you need a decibel figure before you buy, because neither maker publishes one2325.
Ten purifiers by the noise their makers publish
The table is ordered from the lowest published figure to none. Each maker’s figure is its own, and the second column says how it is stated, because IQAir labels its figure sound power, Coway and Rabbit Air label theirs dB(A) and dBA, and the other makers’ pages in our records don’t say which they use91118. Room sizes follow the rule on our room-size calculator page: about 1.55 times the smoke CADR, at 4.8 air changes an hour33.
Prices are US list prices before tax, checked Nov 6, 2026. The Winix 5500-2 is discontinued, so the price shown is for the 5520, not an offer for the 5500-22431. For three-year costs see air purifier ownership cost, which this page doesn’t repeat.
| Purifier | Best for | Quietest setting, as the maker states it | How the figure is stated | Loudest setting | Smoke CADR | Room size at 4.8 air changes an hour | US price | Price and where to buy | Filters a year |
|---|---|---|---|---|---|---|---|---|---|
| IQAir Atem Desk | One person at a desk or bedside who wants quiet, filtered air aimed at them | 20 dB(A) on speed 11112 | Sound power, a different measure from the others. Speed 2 is 27 dB(A)11 | 44 dB(A) on speed 3. No figure for higher custom speeds11 | Not published. Airflow is 4.7 cfm on speed 1 and up to 39 cfm11 | IQAir says up to 150 ft² and gives no air-change rate12 | $399.9913 | $399.99US price, checked Check price at IQAir for IQAir Atem Desk | $79.99 for one filter, about a year at 10 hours a day on speed 314 |
| Blueair Blue Pure 511 | A small bedroom where a low price and few controls are enough | 22 dB on low in the FAQ, 24 dB in the spec table1 | Two figures on one page1 | 44 dB in the FAQ, 49 dB in the spec table1 | 122 smoke1 | 189 ft²1 | $99.991 | $99.99US price, checked Check price at Blueair for Blueair Blue Pure 511 | $47.98 at a change every 6 months28 |
| Blueair Blue Pure 311i Max | A medium bedroom where you want app control and optional smoke or allergen filters | 23 dB on low2 | A dB figure for low and high only2 | 50 dB on high2 | 283 smoke2 | 439 ft²2 | $229.992 | $229.99US price, checked Check price at Blueair for Blueair Blue Pure 311i Max | $89.98 at a change every 6 months, or $59.99 at 929 |
| Levoit Vital 200S-P | A medium bedroom where you want app schedules and an auto mode | 23 dB, and 26 dB or less in sleep mode68 | A range with no per-speed figures6 | 54 dB6 | 250, the smoke figure67 | 388 ft²6 | $199.997 | $199.99US price, checked Check price at Levoit for Levoit Vital 200S-P | $49.99 at the 12-month end of Levoit’s 6 to 12 months8 |
| Alen BreatheSmart 45i | A medium to large bedroom where you want a slim panel unit | 24 dB on the lowest speed15 | A dB figure for the lowest speed and for high1516 | 50 dB on high15 | 255 CFM on high, one figure15 | About 400 ft² at 255 CFM. Alen’s own claim of 950 ft² assumes 2 changes15 | $44915 | $449US price, checked Check price at Alen for Alen BreatheSmart 45i | $69 to $99 per filter, every 6 to 12 months1517 |
| Coway Airmega AP-1512HH Mighty | A medium bedroom where a timer and a dust sensor matter | 24 dB(A)9 | A range with no per-speed breakdown9 | 53 dB(A)9 | 233 smoke9 | 361 ft²9 | $239.999 | $239.99US price, checked Check price at Coway for Coway Airmega AP-1512HH Mighty | $59.79 for the Fresh Starter set10 |
| Levoit Core 300-P | A small bedroom where a low price and a sleep mode matter | 24 dB, and 26 dB or less in sleep mode45 | A range with no per-speed figures4 | 54.5 dB4 | 143, one figure3 | 222 ft²3 | $104.99 for the Black version3 | $104.99US price, checked Check price at Levoit for Levoit Core 300-P | $44.99 at a change every 8 months5 |
| Rabbit Air MinusA2 | A bedroom near 280 ft² where wall mounting helps | 25.6 dBA on the lowest of five speeds1819 | A range with no per-speed breakdown18 | 51.3 dBA18 | 180 smoke18 | About 280 ft². Rabbit Air’s claim of 408 ft² is at 4 changes and its airflow figure18 | $599.9518 | $599.95US price, checked Check price at Rabbit Air for Rabbit Air MinusA2 | $95 for one kit, a year at nonstop use1820 |
| Winix 5500-2 | A Winix purifier, through its current 5520 model | Not published. Winix lists 23.5 dB on the slowest speed of its 552024 | Words only: Winix calls its lowest speed a soft whisper25 | Not published25 | Not stated by Winix. AHAM’s directory lists 239 smoke32 | 370 ft² verified, per the manual26 | Discontinued. Its replacement, the 5520, is $259.992431 | $259.99Replacement model’s US price, checked Price is for the 5520, the model Winix sells now, not an offer for the discontinued 5500-2. The review link opens our 5500-2 page. | A Filter H set about every 12 months. It was $54.99 on sale on Oct 18, $84.99 regular27 |
| Austin Air HealthMate | A filter with lots of carbon that you change every few years | Not published2123 | Not published23 | Not published23 | Not published23 | Not published23 | $84521 | $845US price, checked Check price at Austin Air for Austin Air HealthMate | $395 per filter, up to 5 years, so $79 a year2130 |
These links go to each brand’s own store and earn us no commission.
What a dB on the label does and doesn’t tell you
Start with the measure. IQAir labels its figures as sound power in dB(A), Coway uses dB(A), and Rabbit Air uses dBA91118. Apart from those labels, our records of these pages show no test distance or method.
Next, the speed. A low-speed figure says little about how well the unit cleans on that speed. Alen publishes airflow for each speed: 80, 120, 190 and 255 CFM15. At 80 CFM, arithmetic on a 200 ft² room with 8 ft ceilings gives about 3 air changes an hour, against the 4.8 used for room ratings33. IQAir’s speed 1 moves 4.7 cfm, which is about 0.2 changes an hour in the same room11. IQAir says it sends purified air to your breathing zone and rates it for up to 150 ft²12.
Then the pages themselves. Blueair’s 511 page gives 24 to 49 dB in its spec table and 22 to 44 dB in its FAQ, and we can’t tell which is right1. Levoit says the Core 300-P runs as quietly as 24 dB and gives 26 dB or less in sleep mode, and doesn’t say which setting gives the 2445. The same pattern holds for the Vital 200S-P at 23 and 26 dB68. Four to five dB on a label is small next to these gaps.
Last, the loudest end. Top speeds run from 44 dB(A) for IQAir to 54.5 dB for the Core 300-P411. If you plan to run a unit on high for an hour before bed, that figure matters as much as the low one.
Which one fits a small, medium or large bedroom?
These size bands are ours and are not the same as on the sibling pages. They are built from the room sizes each maker’s CADR gives at 4.8 air changes an hour. They follow the same rule as the room-size calculator. The detail for each band is on its own page: small-room purifiers, medium-room purifiers and purifiers for large rooms.
On this page, a smaller bedroom, up to about 225 ft²: the Blueair 511 at 189 ft² and the Levoit Core 300-P at 222 ft² fit, and IQAir rates the Atem Desk for up to 150 ft²1312. a middle band, about 225 to 440 ft²: the Rabbit Air MinusA2 near 280 ft², the Coway Mighty at 361, the Winix 5500-2 at 370, the Levoit Vital 200S-P at 388, the Alen 45i near 400 and the Blueair 311i Max at 439269151826.
Above that is a larger band, and none of the ten is rated for more than about 440 ft² at 4.8 air changes an hour. The large-room page counts the Alen and the Rabbit Air as large-room units only at about 2 air changes an hour or fewer, and it starts large rooms at 500 ft². The compact page uses under about 220 ft², and the medium page scopes medium to 360 to 440 ft². Austin Air publishes no room size23. For a very large room, two quiet medium units may suit better than one unit run on high.
What the makers don’t publish
Austin Air publishes no noise, CADR, room size or power figure for the HealthMate, so there is nothing to compare for a bedroom23. Winix publishes no decibel figure for the 5500-2, only a description of its lowest speed in words. Its 5520, the current model, lists 23.5 dB on its slowest speed2425.
Coway, Levoit and Rabbit Air give a range with no figure per speed, so you can’t tell what the middle speeds sound like46918. Blueair gives low and high for the 311i Max and Alen gives lowest and high215. IQAir gives noise for three speeds only, and none for its higher custom speeds11.
None of this says a purifier is good or bad for sleep. These are the makers’ figures, not ours, and none of them shows a health effect.
Sources
- Blue Pure 511 Blueair · manufacturer
- Blue Pure 311i Max Blueair · manufacturer
- Levoit Core® 300-P Air Purifier Levoit · manufacturer
- Levoit Core® 300-P Black Air Purifier Levoit · manufacturer
- Levoit Core® 300 Series Original Filter Levoit · manufacturer
- Levoit Vital 200S-P Smart Air Purifier Levoit · manufacturer
- Levoit Vital 200S-P Smart Air Purifier - Black Levoit · manufacturer
- Vital 200S Replacement Filter Levoit · manufacturer
- Airmega Mighty AP-1512HH Coway · manufacturer
- Airmega Mighty AP-1512HH & 200M Filter Set Coway · manufacturer
- Atem Desk technical specifications IQAir · manufacturer
- Atem Desk Air Purifier IQAir · manufacturer
- IQAir Atem Desk product page (price recheck) IQAir · manufacturer
- Atem Desk HyperHEPA Filter IQAir · manufacturer
- BreatheSmart 45i official US product page Alen · manufacturer
- Product and Warranty Information Alen · manufacturer
- BreatheSmart 45i replacement HEPA filters Alen · manufacturer
- MinusA2 Ultra Quiet Air Purifier Rabbit Air · manufacturer
- MinusA2 SPA-780A user manual Rabbit Air · manufacturer
- MinusA2 filter care and maintenance Rabbit Air · manufacturer
- HealthMate Austin Air · manufacturer
- Austin Air owner's manual Austin Air · manufacturer
- HealthMate (Austin Air online store) Austin Air · manufacturer
- Winix 5520 - Air Purifier with WiFi & PlasmaWave® Technology Winix · manufacturer
- Product Spotlight: The 5500-2 Air Purifier by Winix Winix · manufacturer
- 5500-2 User Manual Winix · manufacturer
- Winix 116130 - Winix Replacement Filter H - For Winix 5500-2 & AM80 Air Purifier Winix · manufacturer
- Blue Pure 511 Particle + Carbon Filter Blueair · manufacturer
- Blue Pure 311i Max Particle + Carbon Filter Blueair · manufacturer
- HealthMate Filter Austin Air · manufacturer
- Terms and Conditions (product warranty and return policy) Winix · manufacturer
- AHAM Verifide directory of room air cleaners Association of Home Appliance Manufacturers · certifier
- Portable Air Cleaners and Air Changes per Hour (white paper, Oct 2021) Association of Home Appliance Manufacturers (AHAM Verifide)
How this was written. Written from the sources listed above, checked . It is general information, not medical advice. Talk to a clinician before acting on anything here if you have a health condition or take medication.
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