uses JavaScript to provide the best possible experience for our content, but your browser has it disabled. Learn how to enable it here.


HEPA air purifier on bedroom floor


Some portable air cleaners (or "air purifiers") can help remove microbial particles, i.e., viruses (such as the coronavirus that causes COVID-19), bacteria and fungi. These devices can be part of a strategy for protecting people indoors when used along with other recommended practices. Many of these air cleaners can also effectively remove smoke particles and odors. Keep in mind that ventilating with clean, outdoor air (which can be done by opening a window, for instance) is always the best way to improve indoor air quality.

To help you understand and compare air purifiers, sign-in for the complete answer in which we review dozens of products, showing which we recommend or don't recommend, and which devices are our Top Picks for use in different sized rooms based on their validated performances, certifications and other objective ratings. We also discuss and compare the main types of filters, including fibrous air filters (including true HEPA vs. HEPA-type filters), UVGI filters, electrostatic filters and ionizers (which are often used in personal or "wearable" air purifiers), and filters for removing VOCs.

We review the following air purifiers:

  • Aerus QuietPure Whisper Air Purifier
  • AirDoctor 3000 Professional Air Purifier
  • Aireox Air Purifier Model 45D
  • Airpura UV600 Air Purifier
  • AirSoap Air Purifier
  • Air Oasis iAdaptAir (M) HEPA Air Purifier
  • Alen BreatheSmart FLEX Air Purifier
  • Alen T500 True HEPA Tower Air Purifier
  • Amway Atmosphere Sky Air Treatment System
  • Austin Air HealthMate HM400
  • Biota Bot 608 Air Purifier
  • Blueair Blue Classic 605 Air Purifier
  • Blueair Blue Pure 211+ Air Purifier
  • Blueair Blue Pure 411 Air Purifier
  • Brid Air Purifier
  • CleanAir Whole Home Air Purifier
  • Clarifion Plug In Air Ionizer Air Filter
  • Coway Airmega 300 Air Purifier
  • Coway AP-1512HH Mighty Air Purifier
  • Dyson TP04 Pure Cool Air Purifying Fan
  • Dyson Pure Humidify + Cool PH01
  • EdenPURE OxiLeaf II Thunderstorm Air Purifier
  • EnviroKlenz Mobile Air System With UV Light
  • GermGuardian AC5250PT 5-in-1 Pet Pure Air Purifier
  • GermGuardian True HEPA Filter Air Purifier AC4200W
  • Hathaspace HSP002 Smart True HEPA Air Purifier 2.0
  • HoMedics TotalClean 4-in-1 Small Room Air Purifier
  • Honeywell True HEPA 50250
  • Hunter HP800 Multi-Room Large Console Air Purifier
  • Idylis 3-Speed 310-sq ft HEPA Air Purifier
  • Ionic Comfort Air Purifier
  • IQAir HealthPro Plus Air Purifier
  • Lasko HEPA HF25620 Air Purifier
  • Levoit Core 300 True HEPA Air Purifier
  • LG PuriCare Mini Air Purifier
  • Medify Air MA-25 Air Purifier
  • Mila Air Purifier
  • Molekule Air Air Purifier
  • Nuwave OxyPure Smart Air Purifier
  • Oransi EJ120 Air Purifier
  • Oreck DualMax Air Purifier
  • Philips Air Purifier Series 5000i
  • Rabbit Air BioGS 2.0 SPA-625A Ultra Quiet Air Purifier
  • Rowenta Intense Pure Air XL
  • SilverOnyx Air Purifier with True HEPA Carbon Filter, UV Light, Ionizer
  • Therapure TPP240 Air Purifier
  • TRACS Portable UV-C Air Purifier
  • Venta Original LW25 Airwasher
  • VEVA 8000 Elite Pro Series Air Purifier
  • Vollara Air & Surface Pro
  • Whirlpool WPPRO2000 Whispure Air Purifier
  • Winix C535 Air Cleaner
  • Wynd Plus Smart Personal Air Purifier with Sensor

Sign in now for the full article.

Join today to unlock all member benefits including full access to all CL Answers and over 1,300 reviews.

Join Now

Join now at


Join the conversation

August 25, 2021

We are severely disappointed in our BLueair 211+. We've stopped using it because the filters offgasses some plastic like chemical smell that pervades the whole room. We ordered a replacement filter and it stunk even worse! NOT recommend!

July 24, 2021

Bought 3 Austin Air purifiers several months ago to replace older Blue Air 211+ models. The filters for Blue Air purifiers have become extremely expensive. Boy have I been sorry I swapped the Blue Air out for Austin Air models. First, two of the 3 Austin Air models had fans that began to heat up with continued use at low speeds. I have to the say the Austin Air folks were great about replacing them quickly. However, here it is in the middle of July and fire season is at its all time high and for the first time in almost 5 years, I have smoke in the my house. Blue Air models kept even the heaviest California smoke out. Smoke is light today, but making my eyes burn in my house. I bought the Austin Air models that covered smoke particles as well as to meet bio needs and chose them even though very pricey because the filters were warranted for 5 years with graduated use discounts. So sad. These units are very expensive and really do not work well and are very loud even on lowest speed. I did not mind the noise if the smoke was kept away, but alas now have both smoke and loud noise. Smoke particles are larger than COVID particles, and if the smoke is not being filtered out, pretty sure smaller particles are not either. I have no financial interest in either company -- Austin Air or Blue Air.

April 17, 2021

My WINX has been a big disappointment. The first year I would see dog hair and dust on the washable and even charcoal filters. It was obviously working! I got new charcoal filters, but the hepa looked completely clean, no discoloration at all. Now 3 years later, nothing. New filters, nothing, dust or dog hair shows at all. I can't tell if the hepa needs to be replaced since it looks pristine. My Honeywell grabs every hair, dust mites, and I can see the dust on the charcoal filter big time. It's over 7 years old. I don't even see Honeywell listed here.
April 17, 2021

Hi Kathy, our review of air purifiers includes Honeywell. Please see the list of products we've reviewed in the answer above.

September 9, 2021

Hello Kathy, would you mind saying what model WINIX you have? I'm assuming you used WINIX replacement filters, but would you confirm this? I have just bought a WINIX 5500-2 so I'm very interested in factors that may affect WINIX performance. I will appreciate your information.

March 11, 2021

Can you review the LG line of air purifiers? They claim to be the best.

September 8, 2021

agree - we have an LG personal air purifier: and I'm curious how it performs. My son uses it at lunch at school.

January 3, 2021

Does low humidity in winter effect rates ot Covid 19 infection ...say humidity 20s vs summer 50s ? If so would humidifiers to add more water to winter air be useful? We r in SW FL.
January 13, 2021

Please see the "Humidity may help" section in the answer above.

November 18, 2020

Isn’t cubic square feet relevant to capacity? The open part of my apartment is 700 sq ft, with 11 ft ceilings. Without a discussion of total volume, not just square feet, I’m reluctant to buy anything. It seems like I would need two large machines.
It would be very helpful if you would address this issue, which is even more significant for people with large, open houses.
November 19, 2020

Great question! The suggested room sizes (in square feet) provided in our answer above assume a ceiling height of 8 ft. Because your ceilings are higher than 8 ft., you'll want an air cleaner rated for a larger room. If you have an area that is larger than any available product will serve, the EPA notes that you could consider using multiple air cleaners.

November 22, 2020

Aside from the expense of buying and maintaining two large air purifiers, I think the noise, which folks complain about for a single purifier on high, would be difficult, if not impossible, to live with. So, as I suspected, there’s no solution for those of use with “open plan” spaces. Alas.

November 15, 2020

Can you please review the Idylis 3-Speed 310-sq ft HEPA Air Purifier? I bought mine at Lowe's about 10 years ago. I want to know if it is a good air purifier or, if I need to replace it with one of your recommendations. Thank you SO very much!
November 18, 2020

Thank you for your suggestion. We've added information about the Idylis 3-Speed 310-sq ft HEPA Air Purifier in the answer above.

November 4, 2020

Will you review Hatha Space Medical Grade portable room air purifier?

November 2, 2020

Have you looked at the SilverOnyx air purifier? I'm using 3 of them in my store, and they seem to work very well against mold, etc. Price is good, and each purifier covers about 500 SF. Very easy to use, clean, and replace filters (I try to clean the filter cartridge monthly and replace them yearly.

Donald 21217
October 25, 2020

Have tried two of the Blue Air filters. They both gave off very offensive odors that the company said was from glue used to hold the filter together. I returned both. I did not see any comments about odor on the CL evaluation of this unit, but there are many similar complaints on many other websites to include Amazon.These are made in China. I replaced them with the Austin Healthmate. There is no odor at all and they are doing a great job. They are constructed on parts made in the USA and are manufactured in the USA. I believe USA made is probably a better choice during this time and maybe our USA made are better all of the time. I have no financial interest in either of these companies. I just want clean air in my home without any possibility of toxic contamination.

August 25, 2021

Thank you for reporting this - exactly what we've experienced! I find it disturbing that multiple reviewer sites tout this as an excellent air cleaner when in fact it pollutes the air.

October 14, 2020

I purchased several Winex air filters of the model you reviewed at Costco for $99 ($30 off of their regular price). I notice they are out of stock today but this seldom lasts long. I am pleased with these filters. They are quiet, efficient, and the replacement filters last much longer than I expected.

April 17, 2021

My WINX cost close to $200 and seemed to have stopped filtering much of anything despite changed filters.

October 12, 2020

Can you review the NUWave Oxypure that is heavily advertised on TV ?
October 19, 2020

Thank you for your suggestion. We've added information about the Nuwave OxyPure Smart Air Purifier in our answer above.

October 11, 2020

What is your opinion on the Austin Air Filters?
October 12, 2020

Thank you for your question. We discuss the Austin Air HealthMate - Austin Air Systems' original and most popular device - in our answer above.

October 11, 2020

Can you review the Amway Sky Atmosphere Air Purifier?
October 19, 2020

Thank you for your suggestion. We've added information about the Amway Atmosphere Sky Air Treatment System in our answer above.

October 11, 2020

What are your thoughts on the VEVA 8000 Elite Pro Series Air Purifier?
October 19, 2020

Thank you for your suggestion. We've added information about the VEVA 8000 Elite Pro Series Air Purifier in our answer above.

October 7, 2020

How can I clean an air purifier's filter without exposing myself to the virus particles caught in the filter? thanks.
October 12, 2020

Great question! We have added a section about cleaning portable air purifiers in our answer above.

October 7, 2020

Hi Can you research this please?
I have had a Rowenta Intense Pure Air filter for 5 years. Nano captur technology. It has a pre filter, an active carbon filter, a true hepa filter and a nanocaptur filter. I order filters from Amazon.
October 12, 2020

Thank you for your suggestion. We've added information about the Rowenta Intense Pure Air XL in our answer above.

October 5, 2020

I'd like to see a review of Aireox. The owner built this machine because his wife has MCS as do I. I find it gets rid of chemical odors very well, not sure about dust
October 19, 2020

Thank you for your suggestion. We've added information about the Aireox Air Purifier Model 45D in our answer above.

October 5, 2020

I purchased 2 Honeywell air purifiers this year twice through Amazon. Based Consumer Reports, for me, Honeywell had the best noise & price affordability. However, exchanged the first one thinking there was something wrong it was so noisy?so purchased another which had electrical problems after the first week and stopped working . Conclusion thank God I had 30 days to find out I would’ve been stuck with a broken device , that was only quiet when it was on low:However there’s so little airflow on low and the 4 Hepa Air filters were as pristine despite supposedly cleaning the air for weeks ..I wish I could recommend them but I absolutely don’t.. so reviewed .. Will let you know what happens

October 5, 2020

Do you have plans to test Air Oasis?
October 12, 2020

Thank you for your suggestion. We've added information about the Air Oasis iAdaptAir (M) HEPA Air Purifier in our answer above.

September 30, 2020

I have Austin Air machines for over 15 years. They are pricey up front, but made of steel, not plastic, so no off-gassing. Their filters last years. Curious why they aren't mentioned here? During CA fires 2 years ago, someone left open the kitchen window over night while at Lake Tahoe. I came downstairs and it was like the fire was in the house. I closed the window, ran the machine for an hour, came back downstairs and no smell. They do not have all the bells and whistles, and are slightly loud even on the lowest mode, but IMHO do a great job. I have no financial interest in this company.
October 19, 2020

Thank you for sharing your experience. We've added our recommendation for the Austin Air HealthMate - Austin Air Systems' original and most popular device - in our answer above.

September 30, 2020

I just bought the BlueAir 211 and like it, though it's hard to move. No handle, you have to lift from bottom. It has removed smoke from wildfires here in Colorado. AND I would recommend the Honeywell. I have an old Honeywell 20 years now and still working great. I would of bought another Honeywell but it's unavailable and thought I would try the BlueAir. Thanks for these reviews.

October 24, 2020

I bought two of the BlueAir 211 purifiers from Amazon, one for my classroom and one for my son's classroom. We're both impressed with the performance. I run mine on medium all day. When it's on the first setting you barely hear it (whisper quiet). On the middle setting it's audible but we're used to it. The highest setting is much louder. It comes with two washable nylon covers to cover the bottom part of the machine.

September 28, 2020

What do you think about Winix C535 and similar models?

Also wondering if there is anything cost effective for a bathroom.
October 1, 2020

Thank you for your suggestion. We've added information about the Winix C535 in our answer above. Regarding your question about air purifiers for a bathroom, many are not suitable for use in a bathroom due to the humidity. However, one of the best ways to achieve air movement in a bathroom is to just leave the vent fan running. In fact, the EPA recommends doing this to increase ventilation with outside air:

September 27, 2020

During wildfire season in the West, clean outdoor air is hard to come by. I am more interested in air purifiers that clean smoke particles...

April 18, 2021

J.Claire, I bought three Dylos DC1700-PM particulate sensors six years ago to measure air quality inside my home during the West's wildfires for when the local clean air agency reports "Unhealthy for All" and "Hazardous air" outside. The sensors measure in two size ranges, > 0.5 µm and > 2.5 µm. They are likely too expensive for most people and can give false readings in high humidity, but did fairly well in the South Coast AQMD performance evaluations and have been useful for my purposes. This is what I've learned:

- Without any purifier in my 1970s home (not well sealed or well controlled air exchange/ventilation that newer buildings may have), during prolonged periods of smoke the air quality inside didn't measure much lower than what was outside.

- After 6 years of experimenting, during the worst of the smoke I now run 3 Whirpools (discontinued but there are plenty of other fine choices) on medium in a closed room with wet towels under the doors. I put them on wheels so I can move them from room to room. I have a carbon monoxide detector that measures levels lower than the standard smoke/CO2 alarm and CO2 buildup has not been a problem in my leaky house.

- The indoor air still stinks. I assume this is from gasses that the filters are not designed to capture.

- Moving parts = worn bushings = they get louder over time. Not easy to sleep through, but better for me than traveling to cleaner air or sleeping in a mask.

- The purifier filters get dirty quickly which probably effects efficiency, but the vents still measure excellent air quality no matter how dirty they air. (Not so dirty, however, that they are completely plugged, which might risk overheating.)

- I found that using 2 air purifiers on high did not lower the small particulates as well as 3 on medium. I suspect, but don't know for sure, this is because they stir up dust from the walls, etc. This year, I may try vacuuming walls and ceiling just before the worst fires start.

- When the air quality is unhealthy outside, I am careful not to generate any particulates inside. No stir fries, browning meat, drips in the oven, crumbs in the toaster, popping corn.

Heather 21004
September 27, 2020

Thank you for this article. As a psychologist who sees some clients in office, I am very interested in this kind of data. A purifier that a lot of my colleagues use and recommend is the Air Doctor. I have ordered two but they gave not arrived yet. I do not know its actual efficacy in practice and I'd be curious how it would fare in a review like this. Disclaimer as per your guidelines: I do not have any financial investment in the Air Doctor.
September 30, 2020

Thank you for your suggestion. We've added information about the Air Doctor in our answer above.

September 27, 2020

A local health practitioner uses the Medify MA-25 W1 air filter. Is that a recommended air filter for consumers? Also, is the HoMedics TotalClean 4-in-1 air purifier recommended?
October 1, 2020

Thank you for your questions. We've added information about the Medify Air MA-25 Air Purifier and the HoMedics TotalClean 4-in-1 Small Room Air Purifier in our answer above.

September 27, 2020

We have Winix and Theropure air purifiers. Have you ever evaluated those brands. We'd like to know before we purchase another, of either one. Thanks.
October 1, 2020

Thank you for your interest. We've added information about the Winix C535 Air Cleaner and the Therapure TPP240 Air Purifier in our answer above.

September 27, 2020

What do you think about the : Coway AP-1512HH Mighty Air Purifier with True HEPA and Eco Mode
October 1, 2020

Thank you for your suggestion. We've added information about the Coway AP-1512HH Mighty Air Purifier in our answer above.

September 23, 2020

After the horrendous smoke of the past week we are considering a whole house air purifier that is connected to our heating/cooling system. Would love a review of these options. As we all evolve to deal with climate change, these will become more of a standard feature of most homes, I imagine.
September 28, 2020

Thank you for your comment. Our focus is currently on single-room air cleaners, but some of the same issues regarding types of filtering apply to whole house air purifiers (HVAC systems) as well.

October 11, 2020

Nice article! So, you mention the life expectancy of various Hepa filters. What is that life based on? Constant or regular use? If the device sits unused for long periods, would the filter not have a much longer life expectancy? Thanks
October 12, 2020

The life expectancy of a HEPA filter is typically based on regular use (about 10 to 12 hours per day) rather than constant use (24 hours per day). If a device is being used all day, the filter may need to be changed more often. If it is used less often, the filter may last slightly longer. Of course, other factors can affect filter life. Households that include pets, young children, or people with allergies/asthma may need to change the air filter more often. On the other hand, regularly cleaning the pre-filter can help extend the life of the HEPA filter.

November 8, 2020

Would you please evaluate the Whisper Quiet by Aeros. It is sold by Allergy Buyer's Club

February 5, 2021

Can you evaluate the ion mini air purifier?

September 23, 2020

Nice summary article on indoor air safety. Most indoor forced air heating and air conditioning systems currently in use are not built to handle filters rated finer (higher) then a MERV 11. My service technician recommended last year that I add a RGF's Reme Halo UV light device to my furnace. Luckily for me, I agreed and did this before prices doubled this year. I may still add portable air cleaners upstairs and downstairs.

Join today to unlock all member benefits including full access to CL Answers

Join Now

Join now at