The best air purifiers so you can breathe easy in 2024

Whether you’ve got pets, allergies, or worries about wildfire season, you can look forward to better air quality with one of our well-filtered purifier picks.

Best for large rooms

Mila Smart Air Purifier

Mila Smart Air Purifier

See It

Best for smoke

Alen BreatheSmart 75i

Alen BreatheSmart 75i

See It

Best for allergies

InvisiClean Aura II Air Purifier

InvisiClean Aura II Air Purifier

See It

We may earn revenue from the products available on this page and participate in affiliate programs. Learn more ›

Air purifiers suck in pollen, dust, smoke, other allergens, and even viruses—pummeling them and then circulating clean, filtered air. It sounds simple enough, but not all purifiers are created equal, and there isn’t one that’s right for every person. Your particular environment and the size of your home are huge factors in choosing the best option for you. Is allergy season wreaking havoc on your sinuses? Do you live in a smoggy city? Has wildfire smoke been wafting through, blanketing everything in an unnatural haze? In short, even the finest filters aren’t guaranteed to fix all that ails you and your home. But if you’re wondering whether air purifiers are really worth it … we think so. They can help distribute cleaner air, and that’s always a good thing, considering the link between air quality and health. So, read on as we clear the air on what we think are the best air purifiers.

How we chose the best air purifiers

As pet owners and parents, we’ve experienced our fair share of smells and toxins—and that’s just from inside the house. And whether allergy or wildfire season is upon us, there’s always something environmental to consider. With all this in mind, we compiled peer recommendations, critical reviews, online research, user impressions, and plentiful personal testing to create this list of the best air purifiers. We also examined what each air purifier claims to eliminate from the air, its HEPA square footage, and the filters’ MERV (minimum efficiency reporting values) rating ratings. We also factored in how much noise they make, their size, and cost. Many of these air purifiers use multi-step filtration systems designed to prevent several different types of debris—pollen, dander, dust—from lingering in your air for a long time.

The best air purifiers: Reviews & Recommendations

Sometimes, you need to go beyond mere HVAC filters, and that’s where a home air purifier comes in. Pollen, pet dander, smells, smoke, germs, and other airborne goblins are no match for the best air purifiers. This list includes quiet air purifiers, ones that double as humidifiers, and even ones that claim they can help with a majority of airborne pathogens.

See It

Why it made the cut: This three-in-one smart device automatically adapts to changes in air quality and humidity.

Specs

  • Recommended room size: 400 square feet
  • Dimensions: 36.66 x 11.02 x 12.23 inches
  • App connectivity: Yes
  • Max decibels (dB): 59.8 dB

Pros

  • Connectivity with Siri and Alexa
  • Three products in one
  • Air quality reporting

Cons

  • Expensive

Between its TikTok- and Insta-famous Airwrap multistyler to its line of powerful vacuums, Dyson has made a name for itself in sucking—which we don’t mean negatively. The Dyson PH04 Purifier Humidify+Cool Formaldehyde proves yet again that Sir James Dyson really knows what he’s doing when it comes to pushing air out and in. This smart device uses an intelligent sensing system and Air Multiplier technology to purify, humidify, and cool the air. You don’t even need to touch this stylish, distinctive air purifier and humidifier—it automatically senses and reacts to changes in air quality and humidity (we’ve watched one enthusiastically spring to life time and time again after a particularly aggressive sauté session in the kitchen). It even features a solid-state sensor to detect and destroy formaldehyde emitted by household items—a boon if you’re in a newly renovated/refurbished space, as fresh carpet and new mattresses are emitting odd things.

You don’t have to worry about airborne baddies getting re-released into the air since the entire purifier-humidifier is fully sealed to the HEPA H13 standard. If you love numbers, neat tech, and data, this machine will tickle your brain when it reports your air quality in real-time on the LCD screen and DysonLink app (which you can use to tweak/schedule usage). The filters are low-maintenance and easy to replace, and the machine features a deep-clean cycle to get rid of mineral build-up and bacteria that may be lurking in the water system. Although it’s almost $1,000, you’re getting three devices for the cost of one that we can easily declare has earned our best design award. Talk about smart.

Best for large rooms: Mila Smart Air Purifier

See It

Why it made the cut: This mold- and carbon monoxide-detecting air purifier comes in different filter configurations for custom air purification.

Specs

  • Recommended room size: 1,000 square feet 
  • Dimensions: 12 x 12 x 15 inches
  • App connectivity: Yes
  • Max decibels (dB): 62 dB but lowers to 24 dB while in room

Pros

  • Stylist
  • Small
  • Carbon monoxide, mold detection, and white noise machine built-in

Cons

  • Reviews note excessive air quality notifications

This classy, app-controllable large room air purifier adapts to the size of whatever room it’s placed in. It also looks great in any room it’s placed in. The filter has 45 square feet of HEPA, and with 447 CADR, it’s effective in rooms up to 1,000 square feet. Additional features include a sleep mode and white noise so that it won’t interfere with your sleeping habits. The device also features a carbon monoxide detector. It will monitor your room’s humidity and let you know if it detects any mold. If you’re not a fan of notifications, disable them if you go with the Mila—reviewers note that the Mila app sends lots of alerts. It gets a little noisy when it’s filtering, but it goes practically silent when your air is germ-free.

We also love the Mila’s flexibility. Although it’s an investment, its variety of filters fit in to any life changes. You get your choice of seven filters, including those made for expecting mothers and DIYers painting the house. Air purifiers aren’t made to blend in—you should place them in the center of a room or near seating areas—but this one stands out in terms of style. You can choose colors: white for bright, airy living rooms, or black for dark, mysterious, gothic bedrooms.

Best for small rooms: LEVOIT Air Purifier for Home Bedroom

See It

Why it made the cut: Take this lightweight, compact air purifier from room to room to experience dual-filter, three-stage filtration in your entire home.

Specs

  • Recommended room size: 161 square feet
  • Dimensions: 6.69 x 6.69 x 10.43 inches
  • App connectivity: No
  • Max decibels (dB): 52 dB

Pros

  • Aromatherapy
  • Dual-filter, three-stage filtration
  • Specifically targets hay fever

Cons

  • Not for large homes

The Levoit promises to help relieve allergies, congestion, and sneezing and is our pick for the best small air purifier. Although we can’t vouch for the unit’s specific efficacy against rhinitis, we can vouch for the fact that it has three filters (one more than most other units): HEPA for dust, pollen, and dander; carbon for odors; and polyester for lint and hair. One fun additional feature is that this one has an aromatherapy option if you’d like a little lavender to help lull you to sleep at night.

Best for quiet: Blueair Blue Pure 311i Max

See It

Why it made the cut: Particles down to .1 microns are no match for this quiet-but-powerful air purifier.

Specs

  • Recommended room size: Up to 929 square feet
  • Dimensions: 19 x 12.5 x 12.5 inches
  • App connectivity: Yes
  • Max decibels (dB): 50 dB

Pros

  • Removes particles down to .1 micron
  • Stylish
  • App connectivity

Cons

  • Reviews note occasional problems with auto-sensing

Blueair makes svelte cylinders with Scandinavian style packed with highly effective electrostatic and mechanical filtration. The Blue Pure 311i Max is HEPASilent but deadly … against microbes in the air. This stylish, small air purifier features five fan speeds and a one-touch auto mode with a fine particles (PM 2.5) sensor to monitor concentration and adjust speed accordingly. This air purifier can clean a 387-square-foot room in 12.5 minutes and a 929-square-foot space in 30 minutes (there are both larger and smaller models, so something for every home). And, it snags all those particles (99.97 percent of them down to 0.1 micron) all nearly undetected, clocking in at 23 dB on low/night mode—louder than a quiet natural area with no wind but softer than a whisper. And it never runs above 50dB, which makes it QuietMark certified and perfect for a bedroom, TV room, any room … plus it’s only 8 pounds, so it’s easy to move around while you decide between your study and your yoga studio (or realize it’s easiest to buy two).

Is it working? We barely hear it. But we also don’t hear ourselves sneezing and wheezing and complaining about our watery eyes, so we’re going with yes. If we need more confirmation, we can look at a five-color LED that changes according to Air Quality Index (AQI), or we can reference an app that gives insight into indoor vs. outdoor pollution and lets you control mode, tweak LED Brightness, set a schedule, and more (assuming the 311i Max and your phone are connected to the same Wi-Fi router). And if we don’t want it to be working, Google Assistant and Alexa compatibility let us turn it off with voice commands if our phone isn’t convenient (hooray smart-home devices). While some reviews note that the auto-sensing feature is not as accurate as they hoped, we’ve observed the Blue Pure 311i Max react firsthand thanks to a low smoke-point cooking oil incident or two. It was lively even from across a loft apartment—and helped with the post-coming odors. And the washable pre-filter fabric cover (shown above in “Stockholm Fog” color, quietly complementing some audio-video gear) meshed effortlessly with the decor to boot.

Best HEPA: Clorox Smart Air Purifier

See It

Why it made the cut: Stylish-meets-powerful with this True HEPA air purifier that features three levels of filtration.

Specs

  • Recommended room size: 1,000 square feet
  • Dimensions: 8.74 x 8.74 x 14.65 inches
  • App connectivity: Yes
  • Max decibels (dB): 30 (on low)

Pros

  • Top touchscreen
  • Amazon Alexa control
  • Triple filtration system

Cons

  • Smart features limited to one platform

Clorox has been associated with cleaning products for over a century, so it’s no surprise mid-sized HEPA air purifier does a great job keeping air clean. Aesthetics aren’t everything, but we appreciate the understated look of this air purifier, which doesn’t stick out like a sore thumb in a common area like the living room or throw off the vibe in the bedroom. Circulated air is run through a pre-filter, which catches large particles, true HEPA filter, which captures 99.97 percent of particulates as small as .1 microns in size, and an active carbon filter, which catches unwanted odors. Clorox says this three-stage filtration system was designed to tackle bacteria, pollen, mold, smoke, pet dander, and dust, among other unwanted airborne debris. In our tests, we could detect a difference between the smell of the air in the room this air purifier was in and we saw how much dust it caught when cleaning its filters.

You can control Clorox’s air purifier in a couple of ways. The first is by using the touch-sensitive control panel on its topside, which allows you to control its fan speed, Wi-Fi connection, display brightness, and power state. You can also lock its screen and toggle the air purifier’s auto setting. All of these functions are indicated by glyphs, so you know where to tap at a glance. In our tests, the air purifier’s touch screen worked flawlessly, registering all of our inputs every single time. Additionally, this touch screen will show the relative air quality in your room based on how many particulates it’s finding in the air. A light on the front side of this air purifier will turn from green (good) to red (moderate) and purple (hazardous) in real time to indicate this as well.

If you’ve gone all-in on creating a smart home, you can connect Clorox’s Smart Air Purifier to your home’s Wi-Fi network and control it using Amazon’s Alexa. You’ll need a smart speaker like the Amazon Echo to control the air purifier hands-free or through the Amazon Alexa app on iOS and Android, but it’s nice to have the option if you need it. We’d have preferred that Clorox make its air purifier cross-compatible with multiple smart home platforms, but it’s better to support one than none.

Best with UV light: Germ Guardian True HEPA Filter Air Purifier

See It

Why it made the cut: This quiet air purifier uses CARB-compliant UVC light and titanium dioxide to reduce airborne bacteria, viruses, and mold spores.

Specs

  • Recommended room size: 153 square feet
  • Dimensions: 10.25 x 6.75 x 21.5 inches
  • App connectivity: No
  • Max decibels (dB): 61.2 dB

Pros

  • Quiet
  • Reduces odors
  • Pre-filter traps allergens

Cons

  • UV light can be bad for the environment

UVC light (the most destructive of all the UVs) in an air purifier works as a UVGI—ultraviolet germicidal irradiation—disinfection method by attacking the DNA of cells floating through the air, like mold spores, viruses, and bacteria. (This means, like all other filters, it cannot do anything for particles that have settled into fabric). An activated charcoal filter reduces odors. The 22-inch purifier filters air four times per hour at maximum speed in rooms up to 153 square feet. The four fan speeds, whisper-quiet operation, and CARB compliance make this air purifier an especially good pick for allergy sufferers. California Air Resources Board (CARB) compliance means you can rest easy about its environmental footprint.

Best for allergies: InvisiClean Aura II Air Purifier

See It

Why it made the cut: CARB compliance plus four levels of air purification equals an exorcism for your sneezes.

Specs

  • Recommended room size: 319 square feet
  • Dimensions: 12.34 x 6.25 x 17.75 inches
  • App connectivity: No
  • Max decibels (dB): 55 dB

Pros

  • Four fan speeds
  • Quiet
  • CARB compliant

Cons

  • No auto-sensing

The four fan speeds, whisper-quiet operation, and CARB compliance make this air purifier an especially good pick for allergy sufferers. The California Air Resources Board requires purifiers to produce .050 parts per million of ozone or less, so any device with this certification won’t contribute to unsafe gas levels. If you’re extra nervous about airborne germs, have no fear: this air purifier has a UV light that neutralizes anything the filter doesn’t catch. In fact, the company used third-party testing from SGS Testing for its room air filters. Results showed they eliminated 99% of Influenza A H1N1 Virus, E. Coli Bacteria, Staph. Aureus Bacteria, and Aspergillus Mold from air. According to the company, the purifier delivers double the air output while using up to 82 percent less electricity. That adds up to better breathing all around.

Best for smoke: Alen BreatheSmart 75i

See It

Why it made the cut: Detailed air quality indicators, a B7-Pure filter, and a CADR of 347 mean that this air purifier will stop smoke in its tracks.

Specs

  • Recommended room size: 1300 square feet
  • Dimensions: 12 x 19 x 27 inches
  • App connectivity: No
  • Max decibels (dB): 51 dB

Pros

  • 8 colorways
  • Quickly cleans large rooms
  • Auto-adjusts based on air quality
  • Relatively quiet at high speeds
  • Can swap out panel colors to match decor

Cons

  • Expensive
  • Little warranty
  • Heavy

This is an easy pick for the best air purifier for smoke, thanks to its CADR of 347 (out of 450). Thanks to automatic air-quality detection, the unit will kick up to turbo when any type of smoke is present. When no irritants are present, the device goes into energy-saving mode. Five air quality colors give you a more detailed visual indicator of air quality—other air purifiers only include three color indicators. It’s also the “best design” pick in our best air purifiers for smoke buying guide, which you should check out if you want to smash smog and fog (and nicotine-addicted neighbors) specifically.

Best for mold: PuroAir 400 HEPA 14 Air Purifier

See It

Why it made the cut: Put your mold worries to be with this hospital-grade air purifier.

Specs

  • Recommended room size: 2145 square feet
  • Dimensions: 17.5 x 10.6 x 12.5
  • App connectivity: No
  • Max decibels (dB): Not listed

Pros

  • HEPA 14 filter
  • Easy-to-read air quality monitor
  • Lots of trustworthy certifications

Cons

  • No app connectivity
  • A little noisy compared to other air purifiers

If you’re looking to exterminate mold spores that can make you cough, the PuroAir 400 Air Purifier can do just that, thanks to its HEPA 14 air purifier, which is practically hospital-grade. It’s CARB-compliant, and has ETL, ISO, UL, and Energy Star certifications. This all just means it’s safe to use and energy-efficient. A smart sensor works for you, adjusting power when polluted air is detected when utilizing auto mode. Plus, judging air quality is easy, thanks to an alert light. Red means your air quality is poor, yellow is average, and green is good.

Our only complaint? It’s a little loud on the lowest setting. I personally moved mine to the kitchen (more on that later) since its gentle whoosh was too distracting in my home office. If you’re looking for something quieter, consider our best overall air purifier for mold, the PuroAir 240 HEPA 14 Air Purifier. It has the same HEPA 14 filter found in the 400 but is whisper-quiet.

This air purifier lives in my kitchen to filter any cooking and pet smells. Judge me for keeping the litter box in the kitchen, but it’s the best fit. And, if you’ve ever burned popcorn or cooked with grease, you know how those unpleasant smells tend to linger longer than they should. Thankfully, they don’t overstay their welcome with the PuroAir.

Best for pets: LEVOIT Core P350 Air Air Purifier

See It

Why it made the cut: Eliminate “dog smell” from your space without sacrificing features, design, quality, and price.

Specs

  • Recommended room size: 218 square feet
  • Dimensions: 8.7 x 8.7 x 14.2 inches
  • App connectivity: No
  • Max decibels (dB): 24 dB

Pros

  • Quiet and compact
  • Pet Lock prevents pet and child interference
  • Lots of settings and controls

Cons

  • No app connectivity

Our pets are often considered family. And just like regular children, four-legged kin can stinky, get hair everywhere, and mess with electronics. Thankfully, the Core P350 is an air purifier made with pet ownership in mind. It has a three-in-one filtration system and Pet-Lock to stop hands/paws from meddling with the settings. It’s powerful enough to purify a 219-square-foot room in 12 minutes but only produces 24 decibels of noise. Three fan settings let you choose filtering speeds, and its night mode is so quiet you don’t even recognize that it’s still on. It doesn’t include app connectivity or air quality sensor, but you can’t beat its price and effectiveness if you’ve got how to eliminate pet odors on your mind.

Best budget: LEVOIT Air Purifier for Home, Core 300

See It

Why it made the cut: This compact air purifier tackles smoke, dust, pollen, bacteria, and viruses without hurting your wallet.

Specs

  • Recommended room size: 219 square feet
  • Dimensions: 8.7 x 8.7 x 16.25 inches
  • App connectivity: No
  • Max decibels (dB): 50 dB

Pros

  • Filter life indicator
  • Timer
  • Quiet

Cons

  • Louder than other air purifiers

This cheap air purifier targets smoke, dust, and pollen, along with some bacteria and viruses. Four specialty replacement filters include a pet allergy option and a toxin absorber for particularly smoky or smoggy areas. Like higher-end, more expensive air purifiers, this Levoit air purifier features timer settings and a sleep mode. And the display lights can be turned off to ensure a pitch-black room when sleeping. Although the air purifier is louder than some competitors, it resembles a whooshing fan at its highest setting—if you can deal with that, this air purifier is for you.

I have multiple of these air purifiers: I keep one running in the living room and another in the bedroom. My asthmatic cat wheezes less, and everyone in the house hasn’t gotten ill since purchasing. I attribute both to this air purifier. The filter light reminds me when it’s time to swap out the old for the new, and the specialty filters are reminiscent of what Mila offers at a fraction of the price. I have to vacuum off the sides since it attracts dust bunnies, but that’s just a testament to its power.

What to consider when buying the best air purifiers

The best air purifier for you might not be the one your best friend or neighbor loves. You want a HEPA filter with a high MERV rating that’s designed to cover the amount of space you have in your particular room or dwelling. Beyond that, consider whether you want other features like pathogen-killing UV light, smart controls, and/or odor elimination. Do you need the best air purifier for pets or perhaps something portable? Air purifiers for mold or models to get rid of smoke? Air filters work only on airborne particles. To get at anything that’s settled into upholstery or rugs, you’ll need a handy vacuum, a helpful robot, or something else that offers deep-clean suction.

Size of space

There’s an alphabet soup to make sense of when choosing the best air purifier for your home. ACH (air changes per hour) correlates to the airflow of your device. It’s calculated based on the volume of your space, ceiling height, and how many cubic feet per minute the device can cover. It’s independent of other factors, e.g., the filter’s efficacy—to calculate that, you need the CADR (clean air delivery rate) rating; because a HEPA filter is more efficient, its CADR rating may be lower, which is deceptive.

The most important thing to note is that an air purifier’s efficacy cannot be calculated based on square footage alone. You can find handy calculators online to determine the proper purifier for your needs, but here’s what to consider with any device: Will it successfully rid your home of odors with carbon or other comparable filters? Is it a good choice for pet owners? Does it feature UV light? Read the fine print.

HEPA

You’ve likely heard of high-efficiency particulate air, or HEPA, filters. According to the Environmental Protection Agency, they are a type of pleated air filter that “can theoretically remove at least 99.97 percent of dust, pollen, mold, bacteria, and any airborne particles with a size of .3 microns.” The smaller the particle, the more penetrating and nefarious it can be. So when you’re shopping for air purifiers, check out their filters’ MERV rating—the higher the MERV rating, the better it is at trapping the tiniest particles.

Suppose it’s the coronavirus that has you shopping for purifiers. In that case, it should be said that though a HEPA filter should be able to catch a virus of that size, there’s no conclusive proof that an air purifier can kill airborne COVID-19-carrying air droplets. The Centers for Disease Control and Prevention has stated that any room housing a coronavirus patient “should be exhausted directly to the outside, or be filtered through a high-efficiency particulate air (HEPA) filter directly before recirculation.”

If your main concern about your indoor air quality is lingering food or cigarette smoke odors, make sure the model you’re considering specifically targets fumes and other volatile organic compounds. HEPA filters aren’t good at eliminating odors on their own.

The HEPA filter was initially designed to capture radioactive particles when the atomic bomb was being developed because it can capture 99.97 percent of particles as small as .3 microns, which can evade other types of filters. (This is sometimes referred to as “true HEPA,” as European HEPA standards are required to trap only 85 percent of particles.) It works by ensnaring, sieving, and rerouting irritating particles.

A HEPA air purifier is considered the gold standard, but it does have limitations. Any particle smaller than .3 microns—for example, some viruses and VOCs (volatile organic compounds) like aerosols, ammonia, and other toxins—will slip right through. Changing your filter often enough is key. A HEPA filter does a great job of capturing mold. If you don’t change the filter, the purifier can redistribute that mold back into the air.

Allergies

The best air purifiers for allergies depend on your particular triggers because different filters work on different-sized particles. Pet hair and pollen are large particles, dust is medium-sized, and smoke is small. A combination HEPA-carbon filter is your best bet for filtering the maximum number of irritants to help reduce your allergies.

The addition of an ionizer and UV light, if you’re comfortable with it, adds a belt to your proverbial suspenders. Because UV light does create ozone particles, we recommend choosing an air purifier with UV light that’s approved for sale in California.

Smoke

Pollutants—like smoke and soot—can aggravate asthma, irritate your eyes, and stress your lungs and heart. An intuitive HEPA purifier with multiple fan speeds, maximum air circulation, and zero ozone output is the best one for allergy sufferers and people who are sensitive to smoke. The best air purifiers for smoke have a higher CADR rating. This means your device will be better at eliminating smoke and its odor, whether you’re talking about cigarettes, cannabis, or wildfires.

Portability

You may want to take your air purifier with you on a trip, or between a couple of smaller rooms in your home throughout the day, so factoring in its portability makes sense. Generally, the more portable the air purifier, the smaller amount of space it’ll be designed to cover, so keep this in mind when determining which is best for you.

Noise

If you plan on keeping your air purifier running in your bedroom when you sleep or in a room where you’ll be conducting meetings from home, the amount of noise it makes (measured in decibels) is significant. This linked chart correlates decibel ratings with real-world noises—for instance, the sound of a whisper is roughly 30 decibels. Most of our air purifier recommendations create 50 decibels of sound when running, which correlates to the sound of moderate rainfall, so you don’t have to turn to earplugs for work.

FAQs

Q: How much does an air purifier cost?

Even cheap air purifiers aren’t that cheap—they range between $50-$900. So, chances are, if you’ve found an option within your budget, you don’t need to second-guess it. Go through all the checkboxes you would for a more expensive model: Does it feature a true HEPA filter? Does your air purifier also feature a carbon filter? Is it ozone-free? If the answer to all those questions is yes, then go for it. What you’re likely sacrificing are bells and whistles you may not even need, like Wi-Fi capability or large-space efficacy, but still possibly getting other extras, like low-noise operation and triple filtration.

Q: Should I sleep with the air purifier on?

Sure, there’s no reason not to sleep with the air purifier on! An air purifier contributes to an overall healthy home environment, even while you sleep. In fact, many models feature white noise or overnight modes, so they can continue to work without disturbing you (and possibly even helping you sleep).

Q: Where is the best place to position an air purifier?

The best place to position an air purifier is probably not where you think. Don’t stick it in a corner or behind a piece of furniture to conceal it. Beyond that, if there’s a particular pollutant (smoke, food odor) that you’re trying to combat, place the purifier near it. You want it 3 to 5 feet off the ground—so on a table or sill if it’s not a tower-style—and, whenever possible, near sites of good airflow, like doorways and windows. Moving your purifier from place to place helps maximize its efficacy.

Q: Will an air purifier affect my plants?

Your plants should be safe and sound in the presence of an air purifier, with one exception: models that expel ozone. Otherwise, purified air is good for plants, just like it’s good for humans.

Q: Do air purifiers with UV light really offer extra sanitation?

Opinions on whether air purifiers with UV lights are worth it differ. UV can conquer indoor air particles that escape other filters, like bacteria and viruses, but the EPA has said there’s no way to measure the effectiveness of UV filtration. The UV lights are technically considered pesticidal devices—”an instrument or other machine that is used to destroy, repel, trap or mitigate any pests, including bacteria and viruses”—according to the EPA, and it does not review, and therefore cannot endorse, those. UV light creates potentially harmful ozone, as well, although the amount is small.

Q: How long does a room stay clean after the air purifier?

This depends on both the size of your room and the relative cleanliness of your environment. Some air purifiers offer visual indicators of the cleanliness of the surrounding external environment, which you can help use as a gauge for how often to run it.

Q: Are purifiers worth it?

Yes. If you suffer from allergies to common particulates like pollen, an air purifier can help reduce your exposure to them. Similarly, many air purifiers filter out unwanted odors like smoke, which may waft into your home and linger unwantedly.

Final thoughts on the best air purifiers

In almost every category, the best air purifiers have true HEPA and carbon filters. Together, they get you the most coverage regarding the breadth of pollutants the purifier will attack. Beyond that, the most important qualities are energy efficiency and picking the right model for the size of your room. Everything else—design, whether the device is app-enabled, UV lighting—is just gravy.

Why trust us

Popular Science started writing about technology more than 150 years ago. There was no such thing as “gadget writing” when we published our first issue in 1872, but if there was, our mission to demystify the world of innovation for everyday readers means we would have been all over it. Here in the present, PopSci is fully committed to helping readers navigate the increasingly intimidating array of devices on the market right now.

Our writers and editors have combined decades of experience covering and reviewing consumer electronics. We each have our own obsessive specialties—from high-end audio to video games to cameras and beyond—but when we’re reviewing devices outside of our immediate wheelhouses, we do our best to seek out trustworthy voices and opinions to help guide people to the very best recommendations. We know we don’t know everything, but we’re excited to live through the analysis paralysis that internet shopping can spur so readers don’t have to.

Share
Amanda Reed Avatar

Amanda Reed

Updates Writer

Amanda Reed is a commerce updates writer at Popular Science. She makes sure all product round-ups are up-to-date, shares deals happening all over the internet, and reviews various gizmos and gadgets. She lives in Pittsburgh with JunkJunk, a handsome, sad-looking tuxedo cat who only wants wet food and attention.

Why Trust PopSci