The 7 Best Air Purifiers to Buy in 2018

Shop for the best air purifiers to improve the air quality in your home

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Our Top Picks

Best Overall: Honeywell HPA 300 at Amazon

“Effectively removes dust, pollen, and smoke from the air.”

Runner-Up, Best Overall: Coway AP-1512HH at Amazon

“A sleek, effective unit for smaller spaces.”

Best Budget: GermGuardian AC4825 at Amazon

“Reviewers say the unit is quiet and easy to use.”

Best Design: Dyson Pure Cool Link Air Purifier at Amazon

“This minimalistic unit is available in two color combinations.”

Best for Bedrooms: Honeywell QuietClean Air Purifier at Amazon

“The noise is comparable to a low-level white noise machine which is perfect for sleeping.”

Best for Pets: LEVOIT Air Purifier at Amazon

“Reduces dander and other particles that may be contaminating the air.”

Best for Mold: GermGuardian AC5000E Air Purifier at Amazon

“UV-C light technology and a HEPA filter kill bacteria and mold spores in the air.”

  • 01 of 07

    Best Overall: Honeywell HPA 300 True HEPA Allergen Remover

    Honeywell True HEPA Allergen Remover, 465 sq. Ft, HPA300
    Courtesy of

    If you’re serious about clean air and need a reliable air purifier that can handle a larger space, the Honeywell HPA 300 True HEPA Allergen Remover gets top ratings in expert tests for effectively removing dust, pollen, and smoke from the air. It cleans all the air in a large room five times an hour, letting you breathe a little deeper. This air purifier is Energy Star-rated and certified by the Association of Home Appliance Manufacturers (AHAM) for spaces as large as 465 square feet.

    Owners say the HPA 300 is easy to use and relatively quiet. There are four speeds ranging from low to “turbo,” and it includes an integrated timer. An indicator reminds you when to change filters. Reviewers say low speeds are just fine for most day-to-day use, while higher settings are useful for tackling dust or odors as quickly as possible—after a smoky cooking mishap, for instance. Users can also dim the lights on the control panel, which they say is particularly handy for use in a bedroom. And while it isn’t the quietest air purifier around, it’s still among the quietest when on the highest speed setting. Users say it’s virtually silent on its lowest speed. 

    At 24 inches tall, 22 inches wide and 13 inches deep, the HPA 300 is a bit bulky, and while the utilitarian black casing won’t win any beauty contests, it won’t attract much attention in a corner. Built-in handles make it easy to move from room to room. The unit uses one odor-reducing carbon filter and three HEPA filters. The carbon filter runs about $12 and should be changed every three months. The HEPA filters are about $60 for a three-pack and should be changed once a year.

  • 02 of 07

    Runner-Up, Best Overall: Coway AP-1512HH Mighty Air Purifier

    Coway AP-1512HH Mighty Air Purifier with True HEPA and Eco Mode
    Courtesy of

    If you don’t need an air purifier as powerful as the Honeywell HPA 300, the Coway AP-1512HH Mighty Air Purifier with True HEPA and Eco Mode is a sleek, effective unit for smaller spaces. It’s AHAM-certified for rooms up to 326 square feet and cleans the air four times an hour. This Energy Star-rated air purifier is also super-efficient. On medium speed, it used only a bit more electricity than one LED light bulb, according to tests by The Sweethome. Experts there say it’s strong across the board except for odor removal, which leaves something to be desired.

    The AP-1512HH has a timer, three speeds, an automatic mode, and an energy-saving eco mode. On automatic, it senses surrounding air quality and adjusts accordingly. Reviewers like both settings, and they say the controls on top of the unit are easy to use. An air-quality indicator light cycles between blue, purple, and red, and while most owners like this feature, a few say it shows blue almost all the time, and others are annoyed by how bright it is in a dark bedroom. Most say noise is negligible at low speed, and comparable to a standard fan on the highest setting. There is an ionizer on this air purifier, but it can be turned off.

    At 18 inches tall, 17 inches wide and 9.5 inches deep, the AP-1512HH is more compact than the HPA 300. It’s also more attractive, especially if you like modern design: A shiny black finish and rounded edges make it a lot nicer to look at than most air purifiers. There is a washable pre-filter for large particles, a carbon filter that should be changed every six months, and a HEPA filter that should be changed once a year. A pack of one HEPA filter and two carbon filters costs about $50.

  • 03 of 07

    Best Budget: GermGuardian AC4825

    GermGuardian AC4825 3-in-1 Air Cleaning System with True HEPA Filter, UV-C Sanitizer, Allergen and Odor Reduction, 22-Inch Air Purifier
    Courtesy of

    Clean air shouldn’t be costly, and the top-selling GermGuardian AC4825 means it doesn’t have to be. Like most less-expensive units, this air purifier is best for smaller rooms—in this case, suitable for spaces up to 155 square feet. Aside from the usual carbon and HEPA filters, this Energy Star-rated unit also has a UV-C light to combat germs and bacteria.

    The AC4825 has three speed settings, but it lacks some of the features you’ll find on pricier models. For instance, there is no timer or automatic mode. Reviewers say the unit is fairly quiet, especially on low, while medium and high speeds sound more like a white noise machine. The push-button controls on top of the unit are easy to use, but some users warn the panel’s LED lights are very bright while they’re trying to sleep—particularly the UV-C light indicator. There are reminder lights that blink when it’s time to change a filter or the UV light.

    The black AC4825 is tall and slender, measuring 21.5 inches tall, 10 inches wide and 7 inches deep. The unit has a combined pre-filter, carbon filter and HEPA filter that costs about $35 and should be changed every six months. The UV light should be replaced yearly and costs about $16.

  • 04 of 07

    Best Design: Dyson Pure Cool Link Air Purifier

    Dyson Pure Cool Link Air Purifier, White
    Courtesy of

    You’ll pay a premium, but the Dyson Pure Cool Link Air Purifier is arguably the best looking air purifier on the market. It’s also one of the highest-tech because you can control it with your smartphone. Dyson says the unit’s HEPA filter removes more than 99.9 percent of allergens and pollutants as small as 0.3 microns from the air, but it’s unclear how many times it cleans the air each hour or how big of a space it can cover.

    The Cool Link boasts 10 airflow settings that can be selected via remote control. It also doubles as a bladeless, oscillating fan, though some owners say they feel the fan is underpowered. Air purification is automatic—the unit senses air quality and adjusts accordingly. A night mode dims the LED display and limits operation to the quietest settings, and a sleep timer can be set for up to nine hours. Dyson’s Cool Link app lets users operate the unit and monitor air quality, humidity, and temperature data for both inside and outside the home. However, some users report trouble pairing the Cool Link with their phone.

    Design is the Cool Link’s strong suit. The sleek, oval-shaped tower is a minimalist’s dream, and that’s a good thing: At 40 inches tall, over 4 inches wide and 7.5 inches deep, this air purifier isn’t going to disappear. It’s available in two color combinations: white with silver accents or blue with slate accents. The 360-degree HEPA filter is about $70 and should be replaced after six months of continuous use. 

    Continue to 5 of 7 below.
  • 05 of 07

    Best for Bedrooms: Honeywell HFD-120-Q QuietClean HEPA Tower Air Purifier

    Honeywell HFD-120-Q QuietClean Tower Air Purifier with Permanent Washable Filters, 11 x 10 x 29-Inches
    Courtesy of

    Slender, quiet, and effective, the Honeywell HFD-120-Q combines features that make it an ideal pick for bedrooms. It’s AHAM-certified for rooms up to 170 square feet and cleans the air up to five times an hour. It’s Energy Star-rated, and the washable filters mean users save money, not just energy.

    The HFD-120-Q oscillates like a fan, a feature owners love because it helps move air in all directions. There are three speed settings and a simple LED control panel on top of the unit. An indicator light reminds users when to clean the filters, though some reviewers say the light doesn’t come on even when there’s a lot of dust and debris in the filters. A few also say they have to cover the bright LEDs to fall asleep. The noise is comparable to a low-level white noise machine, making it ideal for use when sleeping. While there is a built-in ionizer that can’t be shut off, it does comply with California Air Resources Board standards that limit emissions to fewer than 50 parts per billion.

    At 29 inches tall, 11 inches long and 10 inches wide, the HFD-120-Q won’t take up much floor space in the corner of even a small room. Rounded corners and a black finish help it blend in most modern households. The unit has a pre-filter and an electrostatic ifD filter that should be washed about once a month—no replacements required.

  • 06 of 07

    Best for Pets: LEVOIT LV-H132 Air Purifier with True Hepa Filter

    This Amazon best seller uses a HEPA filter to drastically reduce dander and other particles that may be contaminating your air thanks to Fido. Whether you suffer from seasonal allergies or constant sniffles from your furry friend, the Levoit air purifier can alleviate all of your allergy-related woes.

    This air purifier is small enough to sit atop a nightstand or table and offers three speed settings, all of which are quiet so you can sleep through the night while also cleaning the air around you. You can also choose to use the air purifier's night light option, which has a high and a low light setting. Reviewers say the product eliminates unwanted scents like food odor, cigarette smoke, and more in a matter of minutes.

    Want to take a look at some other options? See our guide to the best air purifiers for pet owners.

  • 07 of 07

    Best for Mold: GermGuardian AC5000E 3-in-1 Air Purifier with True HEPA Filter

    If you live in an area prone to moisture and humidity, you may need an air purifier with an extra clean factor that prevents mold. This air purifier from Guardian Technologies features a true HEPA filter and UV-C light technology that kills bacteria and mold spores in the air. This purifier features three speed settings and is 28 inches tall, making it on the larger scale for an air purifier. This option is great if you live in a regular to large-sized home.

    Reviewers say this purifier keeps their families feeling healthy and allergy-free. One reviewer even commented that they ran their purifier for 10,000 hours to date and it still works effectively.

Products Tested by

How We Tested

Our reviewers spent 35 hours testing one of the most popular air purifiers available. To really get the full experience, we had them try it in an allergen-filled room and analyze its effectiveness. We also asked them to consider the most important features when using this air purifier, from its filter type to its footprint. We've outlined what matters most here so that you, too, know what to look for when shopping.

What to Look for in an Air Purifier

Size A larger room requires a higher-capacity air purifier. This is measured by clean air delivery rate, or CADR, which indicates how many particles are filtered and how fast. For the most effective air purifier, choose one that has a CADR rating that’s at least two-thirds the size of the room. (A 100-square-foot room would have a CADR rating of at least 67.)

Efficiency Air purifiers clean a room’s air at different intervals over the course of one hour. This is called air change per hour, or ACH rate (which varies from 2-6). An ACH rate of 2 means the air will be cleaned every 30 minutes, an ACH rate of 4 means the air will be cleaned every 15 minutes, and an ACH rate of 6 means the air will be cleaned every 10 minutes.

Filter type There are three main types of filters: HEPA filters, charcoal or active carbon filters, and washable filters. HEPA filters are most effective at reducing common allergens (pet dander, pollen, and dust), but charcoal or active carbon filters remove irritants like smoke or cooking smells more effectively. Washable filters are more cost efficient and environmentally friendly since the entire filter does not need to be replaced.

Test Results: Honeywell True HEPA Allergen Remover HPA 300 (Best Overall)


What We Like

  • Clear instructions and setup

  • Improved air quality

  • Great overall value

What We Don't Like

  • Could be a bit smaller

  • No remote

Honeywell True HEPA Allergen Remover HPA 300
Honeywell Allergen Remover HPA 300
Honeywell Air Purifier
Honeywell True HEPA Allergen Remover
Honeywell True HEPA Allergen Remover HPA 300

Using this air purifier, our testers reported “significant” improvements in air quality. “We've stopped sneezing and the air is so much fresher,” one reviewer noted. They also thought it was a total steal for the price: “It's a great overall value,” said one tester. “Other purifiers with similar features are far more expensive.” However, our reviewers wished the device came with a remote and also said that it “would have been perfect if it was a bit smaller.”