The Best Air Purifiers of 2025

UPDATED
Written by David Rubin

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Air purifier manufacturers often claim that having an air purifier in your bedroom can improve your sleep. Although the connection between hasn't been widely studied, one randomized, controlled trial found that people who slept with an air purifier in the room for two weeks got 12 more minutes of sleep each night on average than those who didn't.

But what air purifiers with a HEPA filter can do is improve air quality by removing indoor pollutants, such as pet dander, and those with an activated carbon filter can remove volatile organic compounds (VOCs). For these reasons, air purifiers can play a role in a good sleep hygiene routine.

We've rounded up the top options to help you find the best home air purifier. Whether you're trying to manage allergies, remove pet odors, or improve overall air quality, there's an air purifier for you.

Our Top Picks

Best Overall

Air Doctor 3500 Air Purifier

Air Doctor 3500 Air Purifier
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This three-stage smart purifier has UltraHEPA and VOC/odor filters, app/auto modes, and whisper-quiet operation designed to capture even tiny pollutants.

Price $659
Room Size 630 sq. ft.
Warranty 1 year
Pros
  • Captures 99.99% of particles as small as 0.003 microns
  • Filters all of the air in a 630 square foot room four times each hour
  • Removes both fine particulate matter and larger particles from the air in medium-to-large rooms
Cons
  • May be too pricey for some shoppers
  • Smart tech features and use of an integrated mobile app require an additional fee

People concerned about allergies, odors, and general air quality should try the AirDoctor 3500 for their living rooms and larger bedrooms. By using an UltraHEPA filter, a carbon filter, and a large-particle filter, it removes pet dander, pollen, mold spores, VOCs, viruses, bacteria, smoke, dust, odors, gases, and microplastics from the air. It can be operated using an optional app for an additional fee and comes with a one-year warranty.

Best Value

Molekule Air Mini+

Molekule Air Mini+
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This compact PECO-HEPA purifier works well for spaces up to about 250 square feet and is FDA-cleared to destroy bacteria and viruses.

Price $359.99
Room Size 250 sq. ft.
Warranty 2 years
Pros
  • Captures between 95% and 99.97% of particles as small as 0.3 microns
  • Auto-Protect mode uses an air quality sensor to monitor pollution levels and automatically increase filtration power as needed
  • Can be monitored and controlled using the free Molekule app
Cons
  • Only designed to be used in rooms up to 250 square feet
  • Some reviewers complain that the fan is too loud

The Molekule Air Mini+ also captures both large and ultra-fine particles using HEPA filtration. The small size makes it more affordable than other air purifiers that target ultra-fine particles, but it should only be used in rooms up to 250 square feet. 

With a photoelectrochemical oxidation (PECO) filter and activated carbon, it removes smoke, pollen, mold, VOCs, viruses, bacteria, pet dander, particulate matter, and more. It can be controlled by a free app and comes with a two-year warranty.

Best Multi-Purpose

Dyson Purifier Cool PC1

Dyson Purifier Cool PC1
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This tower purifier combines HEPA-H13 and activated carbon filters, oscillates up to 350 degrees, and doubles as a fan to both clean and circulate the air.

Price $549.99
Room Size 872 sq. ft.
Warranty 2 years
Pros
  • Captures 99.97% of particles as small as 0.3 microns
  • Contains HEPA and activated carbon filters, which remove odors, gases, small particles, VOCs, allergens like pollen, and more
  • Connects to the free MyDyson app, which can be controlled by voice activation when integrated with Alexa, Siri, or Google Assistant
Cons
  • Larger and heavier than some competitor models
  • Some reviewers feel the bladeless fan design doesn't promote airflow as well as traditional fans

The Dyson Purifier Cool PC1 costs less than some of its competitors and can be used to purify the air in large rooms. This model is also available in multiple colorways and comes with a two-year manufacturer's warranty. Its filters only require changing once per year, which is less often than the filter replacement schedule many other air purifiers require, and it’s energy-efficient by automatically adjusting fan speed.

Best for Pets

HoMedics PetPlus Tower Air Purifier

HoMedics PetPlus Tower Air Purifier
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This 5-in-1 air purifier is built to handle pet dander, odors, and allergens with enhanced filtration and additional features tailored to homes with animals.

Price $145.99
Room Size 266 sq. ft.
Warranty 3 years
Pros
  • Captures 99.97% of particles as small as 0.3 microns
  • Remove large, airborne, pet-related particles as well as pet odors, bacteria, viruses, mold, and fungi with HEPA and UV-C filters and an ionizer
  • Contains a misting option and comes with optional essential oil pads to counter pet smells
Cons
  • Too small to adequately filter the air in larger rooms
  • Fewer reviews than competitors' air purifiers

The PetPlus Tower Air Purifier is our best air purifier for pets because it's an affordable, multi-filter air purifier expressly designed for pet parents. Its HEPA filter removes airborne particles, including pet dander, while the activated carbon filter removes pet odors. This air purifier offers three fan speeds, optional essential oil misting, and a built-in nightlight. It also comes with a three-year warranty, which is longer than the warranties of most other air purifiers.

Best Noise Control

Airdog X3 Air Purifier

Airdog X3 Air Purifier
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This purifier has a strong airflow design, comes with washable filters, and is low maintenance compared to standard HEPA-only models.

Price $369
Room Size 215 sq. ft.
Warranty 1 year
Pros
  • Capable of filtering particles as small as 0.0146 microns, as well as odors
  • Extra-quiet fan, with optional sleep mode that lowers the air purifier's lights and fan speed
  • Filters can be washed and reused, saving money on replacement filters
Cons
  • Contains multiple removable parts that require periodic attention
  • Not everyone wants to wash air filters

The Airdog X3 Air Purifier is our top pick for sleepers who are sensitive to noise and don't want to be bothered by their purifier's fan at night. In addition to being ultra quiet, the Airdog X3 has four fan speed options and can automatically adjust from one to another in response to current indoor air pollution levels. It can be controlled by a smartphone app and comes with a standard one-year warranty.

What Does an Air Purifier Do?

An air purifier removes pollutants from indoor air. Nearly all air purifiers contain a high efficiency particulate air (HEPA) filter and remove dust, pollen, pet dander, mold spores, bacteria, and smoke particles.

Purifiers that contain other types of filters, such as an activated carbon filter, also remove volatile organic compounds (VOCs) and chemicals from the air, such as formaldehyde, benzene, toluene, xylene, and nitrogen dioxide.

Who Should Consider Buying an Air Purifier?

Anyone concerned about indoor air quality should consider buying an air purifier. According to the American Lung Association, indoor air quality can be up to 100 times worse than the air outside. This is due to stoves, furnaces, water heaters, paint, carpeting, chemicals in building construction products, mold, water damage, dust, dust mites, cockroaches, rodents, secondhand smoke, and more.

Poor indoor air quality is known to contribute to asthma, lung cancer, infections, and chronic lung disease. Investing in a quality air purifier for home could improve indoor air quality, thereby reducing health risks.

How to Choose the Best Air Purifier

Consider the following factors to choose the best air purifier for you:

Pollutants to Target

Consider which airborne pollutants you most want to remove. Different air purifiers remove different types of pollutants. For example, if you're primarily concerned about pollen, mold, and dust mites, you may only need an air purifier for allergies. 

Filter Types

  • HEPA Filters: remove particles like allergens and dust but not gas chemicals or odors
  • Activated Carbon Filters: remove gases, odors, and VOCs
  • UV Filters: use light to damage bacteria, viruses, and mold, which keeps them from spreading
  • Pre-Filters: mechanical filters that remove larger particles from the air
  • Ozone Filters: use ozone gas to neutralize odors and smoke but may be hazardous

Room Size

Consider the size of the room you want to keep the air purifier in. From there, comparison shop different air purifiers to see what meets your criteria. Read product descriptions closely to identify how quickly each air purifier can filter all of the air in the room you're shopping for. Ideally, you want to purchase a purifier that can accomplish four air changes per hour (ACH) for a room of your size.

Budget

Air purifiers are available at a variety of price points. If money is a factor, identify your budget early on and consider limiting your search to the air purifiers that fall within that range.

Additional Features

Different air purifiers offer different features. Some can be controlled via an app, while others auto-adjust based on the time of day or the amount of certain airborne pollutants present. Figuring out which additional features are important to you and which you won't use can help you narrow down your options while shopping.

Tips for Using an Air Purifier

Most air purifiers are fairly straightforward, but you will get the best use out of yours if you follow these tips:

  • Read the manufacturer's instructions before you begin using your new air purifier.
  • Remove any unnecessary parts, like plastic pieces, plastic sheets, stickers, or styrofoam that were included for packing purposes.
  • Follow instructions to insert filters and any other removable parts that must be inserted.
  • If there's a related app, download it and connect them, so you can operate your purifier remotely.
  • Explore your purifier's various options, such as a nightlight, different fan speeds, or automatic settings.
  • Identify your purifier's ideal filter replacement schedule, then put reminders for yourself in a paper or digital calendar.
  • Save your receipt and warranty details, so you can easily pursue repairs if they become necessary later on.

References

About the Author

Director of Product Testing for Sleep Doctor

David Rubin

Director of Product Testing for Sleep Doctor

Position: Side Sleeper

Temperature: Hot Sleeper

Chronotype: Lion

David is a Certified Sleep Science Coach with a lifelong passion for well-being and health optimization. His interest in sleep developed with the arrival of his son, when sleep suddenly became a precious commodity. Since then, David has researched everything from bedtime routines to mattress toppers in his quest for a great night’s sleep.

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