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The best air purifiers in 2021

Included in this guide:

Best air purifiers
(Image credit: Coway)

The best air purifiers will make a noticeable difference to the air you breathe. A good air purifier will effectively remove any pollen, dust and smoke particles from the air quickly, as well as quietly. The design should also be intuitive to use and as compact as possible — you don’t want it taking up more space than necessary. These appliances are handy to have if you’ve got pets running around the house, as they can filter out pet dander from the air too. This makes them a great investment if you suffer from allergies, whether from pollen or animals, and they can ease any symptoms you have in the night as well.  

Since the pandemic, some air purifiers claim to help protect against COVID-19 coronavirus by catching the airborne particles that are carrying the virus, according to Consumer Reports. Because of this, air purifiers have become very popular as of late. So, if you want a model which is currently out of stock, be sure to try again in a few days or a week as brands will re-stock regularly. 

It’s worth mentioning that no air purifier will completely remove all air pollutants, and the result isn’t a replacement for clean, outdoor air, according to the Environmental Protection Agency. However, the best air purifiers will make a difference to the quality of the air in your home and improve respiratory health.  

"When used along with other best practices recommended by CDC and others," the EPA says, "[air] filtration can be part of a plan to protect people indoors" from COVID-19.

But, which are the best air purifiers? We've done the research to find the top performers. 

What are the best air purifiers?

Our extensive research compared over 30 brands and after assessing the strengths and weaknesses of each, we found the best air purifiers to suit every home.

We recommend the Coway AP-1512 HH Mighty as the best air purifier overall. It’s a strong performer considering its price point and offers an abundance of filters including a HEPA filter, prefilter, ionizer and odor filter. It’s also quiet in use, which is particularly important if you want to use it at night. 

If you want style as well as substance, then the Blueair Blue Pure 211+ is worth considering. It’s available in a range of colors including pink, blue and yellow, so it really makes a statement. This air purifier is powerful, but is admittedly loud, so perhaps not one for the bedroom at night. It doesn’t feature a HEPA filter either, but BlueAir claims its filters are just as effective. Consumer Reports also noted that this model was one of the best for catching COVID-19 droplets in the air. 

If you’re shopping on a budget, then the Levoit LV-H132 or the Blueair Blue Pure 411 are your best options. Both are affordable, but will make a difference to the quality of your air. IKEA’s new Förnuftig air purifier is also worth checking out. Although, you might need to buy more than one to see similar results to our winner. 

The best air purifier you can buy today

The Coway AP-1512HH Air Purifier in white, in a child's bedroom.

(Image credit: Coway)

1. Coway AP-1512 HH Mighty

The best air purifier overall

Room size: 361 square feet
Filters: True HEPA + washable prefilter + odor filter + bipolar ion filter
CADR (smoke/dust/pollen): 223 cfm/246 cfm/240 cfm
Speeds: Three
Warranty: Three years
Reasons to buy
+Consistently exceptional performance in real-world tests+Quiet+Low-profile design
Reasons to avoid
-Questionable customer support

The Coway AP-1512 HH Mighty is consistently ranked among the best air purifiers on the market — and with good reason. It's also one of the quickest to sell out at online and brick-and-mortar stores.

It's reasonably priced for how well it works, it's one of the quieter machines of its size, and it has most of the features we'd want in an air purifier, including a programmable timer, several fan speeds and a filter indicator light. As a result, it's a bit hard to find in stock right now.

Replacement filters are fairly cheap and energy costs relatively low, which makes the Coway one of the least expensive air purifiers of its caliber to maintain year to year. 

Finally, the Coway AP-1512 HH Mighty is easy on the eyes. It comes in sleek black or white and is relatively compact compared with many other purifiers of similar performance, so it simply fades into a corner.  

The Coway Mighty is one of the only purifiers we considered that has an ionizing function. The effectiveness and safety of ion filters is questionable (due to possible ozone production), but you can just turn this function off. 

Blueair Blue Pure 211+

(Image credit: Blueair)

2. Blueair Blue Pure 211+

The most attractive best air purifier

Room size: 540 square feet
Filters: HEPASilent filter + washable pre-filter
CADR (smoke/dust/pollen): 350 cfm
Speeds: Three
Noise level: 31–56 dB
Warranty: One year
Reasons to buy
+Exceptional performance on highest speed+Fun color options
Reasons to avoid
-Loud on low speed-More expensive upfront and over time than competing models

The Blue Pure 211+ is highly rated for its solid performance in removing dust, smoke and pollen from room air. 

The Blueair's filters aren't true HEPA-certified, but they are still effective. They work by giving particles an electric charge, which causes those particles to stick to filter fibers.

The Blue 211+ pre-filter comes in five different colors, from eye-popping yellow to low-key gray, so you can customize the look for your space. The machine also has a filter indicator light to let you know when it's time to replace your main filter. 

Possible downsides of the Blue Pure 211+ include more noise on lower speeds compared with similar machines, and relatively high purchase and maintenance costs. For example, it draws more power than the Coway on similar speeds (though it moves more air) and it is a bit louder and more expensive (both upfront and over time). 

Blueair Blue Pure 411

(Image credit: Blueair)

3. Blueair Blue Pure 411

The best air purifier for small spaces

Room size: 161 square feet
Filters: HEPASilent filter + washable pre-filter
CADR (smoke/dust/pollen): 105 cfm/120 cfm/120 cfm
Speeds: Three
Noise level: 17– 46 dB
Warranty: One year
Reasons to buy
+Energy efficient+Affordable
Reasons to avoid
-Small design with limited reach

The Blue Pure 411 is like the 211+'s much smaller sibling. It uses similar filtering technology and features and comes in a variety of colors. 

Where the Blue Pure 411 stands out is in price and efficiency. The purifier is inexpensive to buy (just over $100) and maintain (around $20 annually for replacement filters), and it uses significantly less energy than most other air purifiers we researched. The machine is also small, compact and quiet, making it a great choice for your bedroom. 

The one thing to keep in mind is that if you plan to move your purifier from room to room, the Blue Pure 411 won't be very effective in larger spaces. 

Coway Airmega 400

(Image credit: Conway)

4. Coway Airmega 400

The best air purifier for large spaces

Room size: 1,560 square feet (maximum)
Filters: Dual true HEPA/carbon filter + washable pre-filter
CADR (smoke/dust/pollen): 350 cfm
Speeds: Four
Noise level: 22–52 dB
Warranty: Five years
Reasons to buy
+High-performing dual filters+Aesthetically pleasing
Reasons to avoid

Coway's Airmega 400 is a high-performing air purifier at a high price, but reviewers generally agree that the trade-off is worthwhile. The Airmega 400 has a dual carbon + true HEPA filter, which allows it to clean the air in a large space over a short period more effectively than other machines. 

Coway claims the Airmega 400 is good for filtering rooms of up to 1,560 square feet, but you'll likely get better performance in rooms that are half that size. If you put the purifier in a space up to the maximum recommended size, it'll do two or fewer air changes per hour. 

The Airmega 400 is large but sleek, and it has convenient features like a programmable timer and a display shut-off to minimize disruption during sleep. There's also a "smart" version (the Airmega 400S) that you can integrate with an Alexa device or a mobile app. 

Like its smaller cousin the Coway AP-1512 HH Mighty, the Airemega 400 was out of stock everywhere last time we looked. Hopefully, it will be available again soon.


Austin Air HealthMate HM-400

(Image credit: Austin)

5. Austin Air HealthMate HM-400

The longest-lasting filters

Room size: 938 square feet
Filters: True HEPA + large pre-filter + medium pre-filter + carbon filter
CADR (smoke/dust/pollen): N/A
Speeds: Three
Noise level: 39.8–64.5 dB
Warranty: Five years
Reasons to buy
+Long filter life span+Effective for odor and chemical sensitivities
Reasons to avoid

The Austin Air Healthmate HM-400's main selling point is its high-performing and long-lasting filters, which handle everything from mold and pet dander to gas and chemical contaminants. 

It isn't CADR-tested, but it gets high marks from reviewers for filtering volatile organic compounds (VOCs) that come from household products such as paints, pesticides and air fresheners better than most other machines on the market. 

In addition to being effective, Healthmate HM-400 filters last for up to five years. You can vacuum or clean the pre-filter periodically in that time as well. 

Criticisms of the Healthmate HM-400 include a fairly time-consuming filter-replacement process as well as noisy medium and high fan speeds. The unit also doesn't have some basic features (such as a programmable timer or filter indicator light) that you'd expect even at a lower price, and it's fairly power-hungry. 

While the Healthmate HM-400 is pricey, it's a good option if you have particular concerns about chemicals and odors. 

Honeywell HPA300

(Image credit: Honeywell)

6. Honeywell HPA300

A good value pick among air purifiers

Room size: 465 square feet
Filters: True HEPA + disposable pre-filter
CADR (smoke/dust/pollen): 300 cfm/320 cfm/300 cfm
Speeds: Four
Warranty: Five years
Reasons to buy
+Portable and easy to use+Quiet on low speeds; relatively quiet on high setting
Reasons to avoid
-More expensive than some similar units-Significant maintenance requirements

Honeywell air purifiers get decent reviews across the board, and the HPA300 is a good unit for a fairly reasonable price. 

It has among the highest CADR ratings for smoke, dust and pollen of the units we recommend, and it can filter slightly larger rooms effectively. It also has four speeds (compared with three on most units), a programmable timer and adjustable control panel lights.

The HPA300 is also portable, so you can move it easily between rooms. The HPA300 is also quieter at higher speeds than some other units. 

Where the Honeywell HPA300 could fall short is in its filter-replacement and maintenance requirements. Both the true HEPA filter and pre-filter are disposable and must be replaced every six to 12 months.The HEPA filter is actually three filters that reviewers said can be tricky to get in the exact right spot. 

Levoit LV-H132

(Image credit: Levoit)

7. Levoit LV-H132

The best air purifier for very tight budgets

Room size: 129 square feet
Filters: True HEPA + disposable pre-filter + carbon filter
CADR (smoke/dust/pollen): 110 cfm
Speeds: Three
Noise level: 50 dB max
Warranty: Two years
Reasons to buy
+Decent performance for the price+Small and portable
Reasons to avoid
-Loud-Minimal features

The Levoit LV-H132 is an Amazon best-seller and the most budget-friendly purifier on our list. Reviewers said it does a decent job for the price, especially with pet odors. It's also a sleek machine that's lightweight, compact and portable, so you can easily move it around your home. 

At this price, you can't expect bells and whistles — and the Levoit LV-H132 doesn't have any. There is no programmable timer, and the device's filter indicator light reminds you to check your filters but does not tell you when it's time to actually replace them. 

You have to toss all three filters every six months to a year, as the pre-filter isn't washable. But two replacement sets will cost you just $30. 

Reviewers report that the Levoit LV-H132 is fairly loud on higher settings, so sensitive sleepers may struggle to use this unit in their bedrooms. The buttons are also reportedly finicky — they may stick, freeze, or quit working altogether. 

If you're looking for an inexpensive air purifier — or want several machines to cover multiple bedrooms in your home — the Levoit LV-H132 is a decent unit to start with. Truthfully, though, it's probably worth it to spend a bit more for a better device (like the Blue Pure 411) than to compromise with the Levoit. 

PureZone 3-in-1 True HEPA Air Purifier

(Image credit: PureZone)

8. PureZone 3-in-1 True HEPA Air Purifier

The best air purifier for nurseries and bedrooms

Room size: 200 square feet
Filters: True HEPA + disposable pre-filter + carbon filter + UV-C light
CADR (smoke/dust/pollen): 80
Speeds: Three
Noise level: 30–50 dB
Warranty: Five years
Reasons to buy
+Relatively quiet+Attractive design
Reasons to avoid
-Less effective than similarly priced models

The PureZone 3-in-1 True HEPA Air Purifier is another popular (and budget-friendly) model among customers. It's small, sleek and unobtrusive, which makes it a good choice for those who care about aesthetics and decent performance. 

What sets the PureZone 3-in-1 apart is its quiet operation. It's soft on lower settings and has an automatic timer that can shut the device off while you sleep. This makes it a good option for bedrooms and babies' rooms where noise and light disruption matter. The device  comes with a five-year warranty, longer than other machines at similar prices. 

The PureZone 3-in-1 has one of the lowest CADR ratings of the devices on this list (80 cfm) and reportedly has a weak fan that limits it to small spaces, but reviewers say that it's effective at filtering most common air particles. 

IQAir HealthPro Plus

(Image credit: IQAir)

9. IQAir HealthPro Plus

The best air purifier for allergy sufferers

Room size: 1,125 square feet
Filters: HyperHEPA + disposable pre-filter + V5-cell gas & odor filter
CADR (smoke/dust/pollen): N/A
Speeds: Six
Warranty: 10 years
Reasons to buy
+Individually tested units+Top-notch warranty+Medical-grade filters
Reasons to avoid
-Expensive to buy and maintain-Loud on higher speeds

Let's state the obvious: the IQAir HealthPro Plus is expensive. At around $900, it's several times the price of many other picks on our list. 

But if you're serious about air purification, this machine is well worth your consideration. It uses HyperHEPA filters, which reportedly retain particles at a rate 100 times higher than standard HEPA filters, as well as a secondary filter for odors and gases. 

The IQAir HealthPro Plus also covers a huge area (1,125 square feet) at two air changes per hour, and can do six per hour in a smaller room. Plus, it has six speeds, programming options, filter indicators and a remote control. 

This purifier is a top seller and highly rated by experts at Allergy Buyers Club, especially for those who have allergies or other special health concerns that are affected by air quality. While it isn't CADR-rated, IQAir tests every unit individually and offers a 10-year warranty, double the time of any other device we recommend. 

While the IQAir HealthPro Plus is larger, louder and pricier than most air purifiers, reviewers say it may provide the relief those with asthma, allergies and respiratory challenges seek. 

Two Förnuftig air purifiers standing side by side.

(Image credit: IKEA)

10. IKEA Förnuftig

The least expensive air purifier we've seen

Room size: 108 square feet
Filters: HEPA-like, activated-carbon & prefilter
CADR: 70 cfm
Speeds: Three
Noise level: 29-60 dB
Warranty: Five years
Reasons to buy
+Very affordable+Small and light+Attractive design
Reasons to avoid
-Not much power-Best for only the smallest rooms

IKEA entered the air-purifier arena in April 2021 with the Förnuftig, a very inexpensive and very attractive model that looks like a Danish-modern loudspeaker. The Förnuftig is so light (less that 8 pounds) and small (12 x 18 inches) that you can even hang it on the wall. 

Even the operational costs are low. The Förnuftig comes with a HEPA-like filter for small particles — replacement filters are $5.49 each — and there's an optional activated-carbon filter for odors and VOCs that costs $9.99. You're looking at a total yearly outlay of less than $50.

Now for the downside. A single Förnuftig can really handle only the smallest rooms, those of 108 or fewer square feet. It's got a top CADR of 70 cfm, which barely clears the EPA minimum recommendations and is the lowest we've seen. And at 60 dB for the highest fan speed — the one that delivers the maximum CADR — it might get a little loud. 

You could in theory just get two or three units, hang them around the house and see how you like them. Overall, the Förnuftig can't really go toe-to-toe with the best air purifiers — but at these prices, it may not need to.

The Levoit Core 400S air purifier next to a houseplant.

(Image credit: Levoit/Arovast)

11. Levoit Core 400S

A sleek, smart air purifier with few downsides

Room size: 400 square feet
Filters: True HEPA + washable prefilter + carbon filter
Speeds: Five (incl. Sleep Mode)
Noise level: 24-52 dB
Warranty: One year, extended to two years if you register within 14 days of purchase
Reasons to buy
+Sleek and futuristic+Rich feature set+Easy to set up and transport
Reasons to avoid
-Highest fan speed can get loud

The Levoit Core 400S is one of the most attractive air purifiers we've encountered, and its wide assortment of features and reasonable price (about $200) make it a worthy contender among models in the 400-square-foot range. If the robot EVE from the movie "Wall-E" could be an air purifier, this is how she would look. 

The white cylindrical unit has a black vent on top through which the air flows, surrounding a circular control panel. At the center of the control panel is a digital readout telling you how clean your air is, as measured by the number of particles 2.5 micrometers or smaller per cubic meter. If it's very good, a ring of LEDs is blue; lessening degrees of air quality turn the LEDs green, orange or red.

Because the Levoit Core 400S tests your air quality, it can automatically adjust the fan speed to match. The Wi-Fi-enabled unit can be controlled via a smartphone app that lets you change fan speeds or set a timer or a schedule, whether at home or remotely. It's also compatible with Amazon Alexa and Google Assistant.

How to choose the best air purifier for you

There are dozens of air purifiers on the market, and it can be difficult to sort out which one is the best air purifier for your home size, health concerns and price. Here are a few factors to consider. 

The best air purifiers compared

List PriceRoom sizeFilterCADR (cfm)Noise level
Coway AP-1512 HH Mighty$230361 sq. ftTrue HEPA233/246/24024.4-53.8 dB
Blueair Blue Pure 211+$300540 sq. ft.HEPASilent35031-56 dB
Blueair Blue Pure 411$120161 sq. ft.HEPASilent105/120/12017-46 dB
Coway Airmega 400$6501,560 sq. ft.True HEPA35022-52 dB
Austin Air HealthMate HM-400$595938 sq. ft.True HEPAUnavailable39.8 dB - 64.5 dB
Honeywell HPA300$250465 sq. ft.True HEPA300/320/300Unavailable
Levoit LV-H132$90129 sq. ft.True HEPA110Up to 50 dB
PureZone 3-in-1 True HEPA Air Purifier$100200 sq. ft.True HEPA8030-50 dB
IQAir HealthPro Plus$9001,125 sq. ft.HyperHEPAUnavailable35-69 dB
IKEA Förnuftig$55108 sq. ft.HEPA-like7029-60 dB
Levoit Core 400S$220400 sq, ft.True HEPA26024-52 dB

Air purifier CADR ratings

The effectiveness of an air purifier can be measured by the CADR (Clean air delivery rate). This number reveals its performance depending on a particular room size. The higher the number, the better it is at clearing airborne particles and the more effective it is at cleaning a larger space too. 

The numbers translate to how many cubic feet of air the purifier can clean per minute. The standard goal is to clean a full room’s worth of air in 15 minutes. So, for instance, a 300-square-foot room would need an air purifier with a CADR of 200 or so, assuming ceilings were 10 feet high and any doors and windows were closed. 

Some air purifiers come with different CADRs for smoke, pollen and dust, so you can see which it is most effective for. 

Here are the minimum CADR ratings the Environmental Protection Agency recommends by room size:  

Area (sq. ft.)100200300400500600
Minimum CADR (cfm)65130195260325390

Not every purifier is tested using the CADR rating system, but real-life reviews can give you a sense of a device's effectiveness if a rating isn't available. 

Air purifier filter types

In general, you'll want to look for a purifier that uses a true high-efficiency particulate air (HEPA) filter. 

Government agencies and professional groups, including the EPA and the American Lung Association, recommend True HEPA filters as the standard for air purification. These filters trap 99.97% of particles that are at least 0.3 microns in size. 

Some devices have HEPA-type filters, which work similarly but aren't held to the same performance standards. The IQAir HealthPro Plus uses a HyperHEPA filter, which is believed to capture even smaller particles than a True HEPA filter. 

Your purifier will likely also come with a pre-filter (some you can clean, some you have to toss after a few months) that catches the big stuff like pet fur and human hair before it reaches the main filter. 

Some devices have additional filters, like carbon or charcoal filters, that trap the petroleum-based gases known as volatile organic compounds (VOCs).

Air purifier noise levels

Air-purifier noise levels range from nearly silent to steady humming, like an AC unit. Depending on the fan speed you're using and where you're placing your purifier, you may prefer a quieter device.

Air purifier added costs

Many of us aren’t aware of the added costs when running an air purifier. Firstly, you should consider the cost of replacement filters, then there’s the energy needed to power the appliance on a regular basis. In terms of the filter replacement, some models are fitted with filters which can last for years, but can be very expensive to replace. Whereas others can be cheaper, but a replacement is needed much more often. To calculate the actual cost, you need to balance out the frequency of changing the filter with the cost per filter. OneLife’s new air purifier never needs its filter replaced if you really want to save!  

You should also take energy consumption into account. Some of the best air purifiers in our list are Energy Star Certified and these generally will save money in the long term. Bear in mind that different speeds and settings will affect how much energy it uses though.

If an air purifier is designed to reach a large room and it uses a powerful fan to do so, it is likely to consume more energy than a smaller model, although efficiency can vary. One setting worth looking out for is an ‘Eco mode’ — this should save on energy use and makes the product more sustainable in operation. Looking at our list, the Blue Pure 411 requires the least amount of energy, but it can only reach a small space, so you should always consider energy use with coverage.    

Air purifier extra features

Some features are more nice-to-have extras than absolute requirements. In general, pricier purifiers come with more features, such as filter indicator lights, dimmable lights and programmable timers. 

Only one of the devices we recommend (the IQAir HealthPro Plus) comes with a remote control, but we're not convinced that this adds a lot of value to the machine. 

Should I get a smart air purifier?  

Some modern air purifiers, such as the Levoit Core 400S, can be connected to the Wi-Fi and linked to an app on your smartphone. In doing this, you can control the air purifier remotely, including changing the fan speed or setting a schedule. For some air purifiers, the app will also breakdown the quality of the air and let you monitor it more precisely. 

This can give you a much better understanding of what’s in your air and you can see the effect the air purifier is having on it too. Using the Dyson air purifier app for instance, you can see the different levels of particulate matter as well as any volatile organic compounds (VOCs) and nitrogen dioxide. This is usually displayed in a chart form so you can see where there’s been an increase in any air impurities. 

This can be a useful feature to have, particularly if you want to better understand your air and want to source where your allergies are coming from. It’s also nice to see the evidence that the air purifier is making a difference. 

Some apps will even display what the air is like outside as well, so you know not to leave when the pollen count is high or the general air quality is low. 

How we picked the best air purifiers

To make our short list of air purifiers for consideration, we looked at top picks from Wirecutter, Consumer Reports, Allergy Buyers Club and others, and also noted the top-selling and most highly reviewed models on Amazon, Home Depot and Best Buy. We narrowed down our list to nine models based on features, price and other factors, including clean air delivery rate (CADR) ratings and noise levels.