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The best air purifiers in 2021

Best air purifiers
(Image credit: Coway)

Having one (or more) of the best air purifiers in your house, apartment or other dwelling will filter out many dangerous airborne particles. That's especially true if you suffer from allergies, have pets who shed, live with a smoker or simply want to breathe better.

The best air purifiers offer protection against particles carrying the COVID-19 coronavirus, Consumer Reports recently found. That may be why some stores seem to run out of stock off and on as the coronavirus crisis persists. If the model you like below isn't available, it's worth checking back in another week.

No device can completely get rid of air pollutants or be a substitute for clean outdoor air, says the Environmental Protection Agency. But the best air purifiers may indeed 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.

That will be especially true if you suffer from pre-existing conditions such as asthma or from chronic allergies. Air purifiers with HEPA or "HEPA-like" filters will trap most airborne particles, including pet dander and pollen. 

Airborne droplets expelled from the mouth or nose of someone infected with COVID-19 can also be removed from the air, although the rate at which the air is cleaned depends on the specific model.

Some of the best air purifiers have pre-filters to trap larger pet hairs before they get to the main filter. Others use electrostatic attraction to trap very small particles or ultraviolet lights to kill bacteria and mold. And some use charcoal or carbon filters to trap petroleum-based gases.

What are the best air purifiers?

Our research examined more than 30 brands and dozens of customer and expert reviews, and we've come up with the best air purifiers for your home or office. 

Our top pick is the Coway AP-1512 HH Mighty, a quiet model with a HEPA filter, prefilter, ionizer and odor filter. With its strong performance for the price (including the cost of replacement filters), this is the best air purifier for most people.

The best-looking air purifier is the Blueair Blue Pure 211+, which comes in five colors  including yellow, blue and pink. It's powerful, but a bit loud. It doesn't have a HEPA filter but Blueair insists its filters are even better. (Consumer Reports said this is one of the best at cleaning a room of COVID-19 droplets.)

For tight budgets, we recommend the Levoit LV-H132 or the Blueair Blue Pure 411. Either will do nicely in your bedroom. There's also the new IKEA Förnuftig, which is extremely affordable, although you may want to get more than one to see good results.

Parents of young children will like the PureZone 3-in-1 True HEPA Air Purifier, which is small, quiet and perfect for kids' bedrooms. It can also be put on a timer to shut itself off while the little ones slumber. 

If you don't like changing filters, try the Austin Air HealthMate HM-400. Its filters last up to 5 years. It also filters out the the volatile organic compounds (VOCs) you'll get from fresh paints, plastics and petroleum products.

Finally, if money is no object and clean air is critical to your health needs, the IQAir HealthPro Plus or the Coway Airmega 400 may fit the bill. Both are equipped to handle rooms of 1,000 square feet or more. 

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

Consistently exceptional performance in real-world tests
Low-profile design
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. 

Best air purifiers: 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

Exceptional performance on highest speed
Fun color options
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). 

Best air purifiers: 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

Energy efficient
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. 

Best air purifiers: Coway Airmega 400

(Image credit: Conway)

4. Coway Airmega 400

The best air purifiers 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

High-performing dual filters
Aesthetically pleasing

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.


Best air purifiers: 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

Long filter life span
Effective for odor and chemical sensitivities

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. 

Best air purifiers: 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

Portable and easy to use
Quiet on low speeds; relatively quiet on high setting
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. 

Best air purifiers: 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

Decent performance for the price
Small and portable
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. 

Best air purifiers: 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

Relatively quiet
Attractive design
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. 

Best air purifiers: 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

Individually tested units
Top-notch warranty
Medical-grade filters
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. 

Best air purifiers: 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

Very affordable
Small and light
Attractive design
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.

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

Air purifier CADR ratings

Most air purifiers have a clean air delivery rate (CADR) number that helps consumers understand how effective the device is in a certain room size. The higher the number, the more particles the purifier can remove, and the larger the space it can clean. 

The numbers represent how many cubic feet per minute an air purifier can clean. The goal is to have all the air in a room cleaned in about 15 minutes, so a 300-square-foot room would need an air purifier with a CADR of about 200, assuming the ceilings were 10 feet high and the doors were kept closed.

Some devices have different CADR ratings for smoke (the smallest particle), dust and pollen (the largest particle). 

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

The purchase price of your air purifier is one thing. Ongoing filter replacement and energy costs are another. For example, some machines have filters that last for years but are expensive to replace, while others work with filters that are cheap to purchase but have to be changed frequently. 

You'll also want to consider the cost of electricity. Some of the best air purifiers we recommend are ENERGY STAR certified, but each pulls varying amounts of power on different fan speeds. 

Devices for larger rooms and with higher speeds tend to use more electricity. although this isn't a hard-and-fast rule. Some devices also have eco modes. The Blue Pure 411 requires the least energy, but it covers only a small room. 

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. 

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.