Best Air Purifiers for Bedrooms: 6 Quiet Picks by Room Size
Six quiet HEPA air purifiers for bedrooms, sized by room with EPA's CADR table, with each maker's or listing's noise and coverage figures.
Short answerTop pick: the Coway Airmega 150, which Coway rates at a smoke CADR of 153 and a lowest noise level of about 20 dB, enough for a bedroom of roughly 230 square feet by EPA's sizing table, with a light you can switch off. Choose the Levoit Vital 200S-P for a larger primary bedroom, the Blueair Blue Pure 511i Max for a small bedroom where the lowest listed noise matters most, and the Levoit Core 200S-P or Coway Airmega 100 for a smaller budget.
Compare the 6 picks
| Pick | Best for | Amazon |
|---|---|---|
| Coway Airmega 150, White | A typical bedroom up to about 230 square feet, for someone who wants the published noise and CADR figures in one place. | Check price on Amazon |
| LEVOIT Vital 200S-P Smart Air Purifier, White | A larger primary bedroom, up to roughly 380 square feet. | Check price on Amazon |
| BLUEAIR Blue Pure 511i Max, WiFi | A small bedroom, nursery or dorm room where the lowest listed noise matters most. | Check price on Amazon |
| BLUEAIR Signature SP1i, WiFi | A small bedroom or nursery where someone also wants odor control and an air-quality light that blends in. | Check price on Amazon |
| LEVOIT Core 200S-P Smart Air Purifier, White | A small bedroom of about 140 square feet on a budget. | Check price on Amazon |
| COWAY Airmega 100, White | A mid-size bedroom on a budget, for someone who wants the lights off at night. | Check price on Amazon |
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On this page
How to size a bedroom air purifier
EPA's sizing table for particle removal lists a minimum CADR (clean air delivery rate) of 65 for a 100 square foot room, 130 for 200, 195 for 300, 260 for 400, 325 for 500 and 390 for 600, for rooms with 8-foot ceilings.
- Measure the bedroom and pick a unit whose smoke CADR meets the table, because the smoke number is the lowest of the three ratings for every pick here that lists all three.
- A maker's biggest square-foot figure is usually one air change an hour. Coway and Levoit also publish a smaller room size at 4.8 air changes an hour, which is the closer match for a bedroom you sleep in.
- EPA says filtration is typically greater at higher fan speeds and that running a unit longer increases filtration, so a purifier sized with room to spare can run on a quieter setting overnight.
Noise, light and placement at night
- EPA says noise levels depend partly on fan speed, and that if noise might stop you from running a unit, you might consider one with a low published noise rating. For reference, EPA says about 50 dB is roughly the operating noise of a modern refrigerator.
- The lowest noise figures below (about 19 to 27 dB) are each maker's or listing's figure for the slowest setting; higher speeds are louder.
- EPA suggests placing a portable air cleaner in the room you spend the most time in, making sure its airflow is not obstructed and keeping it away from curtains and anything else that might block airflow.
- EPA says to avoid air cleaners that intentionally produce ozone, a lung irritant, and notes that ionizers and plasma air cleaners may have the potential to emit ozone. Every pick here is a filter-based unit.
6 picks and who each one suits
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Coway Airmega 150, White
Best for: A typical bedroom up to about 230 square feet, for someone who wants the published noise and CADR figures in one place.
Coway lists CADR ratings of 153 for smoke, 161 for dust and 220 for pollen, 214 square feet at 4.8 air changes an hour, a noise range of 19.98 to 48.3 dB(A), a pre-filter, deodorization filter and HEPA filter, and an air quality light that can be turned on or off. By EPA's table, a smoke CADR of 153 matches a room of about 235 square feet.
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LEVOIT Vital 200S-P Smart Air Purifier, White
Best for: A larger primary bedroom, up to roughly 380 square feet.
The listing says it is AHAM Verifide with CADR ratings of 250 for smoke, 254 for dust and 289 for pollen, a HEPA sleep mode and noise as low as 27 dB. By EPA's table, a smoke CADR of 250 matches a room of about 385 square feet.
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BLUEAIR Blue Pure 511i Max, WiFi
Best for: A small bedroom, nursery or dorm room where the lowest listed noise matters most.
The listing says it is AHAM Verified, runs as quietly as 19 dB, cleans 237 square feet in about 12.5 minutes and up to 1,138 square feet in one hour, and adjusts fan speed automatically with built-in air quality sensors and app control.
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BLUEAIR Signature SP1i, WiFi
Best for: A small bedroom or nursery where someone also wants odor control and an air-quality light that blends in.
The listing says it cleans 248 square feet in about 12.5 minutes and 1,190 square feet every hour, runs as low as 19 dB, uses HEPASilent filtration with OdorFence for odors and gases, and adjusts itself in Auto Mode with app control.
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LEVOIT Core 200S-P Smart Air Purifier, White
Best for: A small bedroom of about 140 square feet on a budget.
The listing says it is AHAM Verifide, refreshes the air in a 140 square foot room 4.8 times an hour, runs as low as 27 dB and has a Display Off button that turns off all lights. Its main filter is listed as removing 99.97 percent of dust, pollen and dander 0.1 to 0.3 microns in size.
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COWAY Airmega 100, White
Best for: A mid-size bedroom on a budget, for someone who wants the lights off at night.
The listing says it cleans up to 405 square feet in 30 minutes or 810 square feet in 60 minutes with a pre-filter, deodorization filter and HEPA filter, and has a sleep mode that turns off the air-quality and button lights and runs the fan at its lowest speed.
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Frequently asked questions
What size air purifier do I need for a bedroom?
Use EPA's table: a minimum CADR of 130 for a 200 square foot room, 195 for 300 and 260 for 400, with 8-foot ceilings. Pick a unit whose smoke CADR meets that number so it can run on a quieter speed at night.
Is it OK to run an air purifier all night?
EPA says running an air cleaner longer increases the amount of air filtered. For sleep, choose a model with a low published noise rating and a light you can turn off, such as the Coway Airmega 150 or Levoit Core 200S-P.
Are ionizer air purifiers safe for bedrooms?
EPA says to avoid air cleaners that intentionally produce ozone, and notes that ionizers and plasma air cleaners may have the potential to emit ozone. The picks here are filter-based units.
How we chose
This guide is desk research. We compared each purifier's maker page or Amazon listing with EPA's Guide to Air Cleaners in the Home, kept filter-based units with a published CADR or room-size figure and a published noise level, and left out ozone generators. We did not test any of these purifiers; CADR, coverage and noise figures are the makers' or the listings' own, and a listing describes what its seller says, not how a unit performs in your bedroom.
Listings, sellers and stock change quickly. At time of writing (November 1, 2026), every "Check price on Amazon" button on this page went to an exact Amazon listing for the product named, new, in stock and sold by Amazon.com. Prices are not shown because they change. Confirm the model, filter and seller on the listing before you buy.