The 10 Best Smart Air Purifiers of 2024, Tested and Reviewed

By  YOONA WAGENER and EMMA PHELPS

Reviewed by BRANDON PLESHEK

Fact checked by EMILY ESTEP

These appliances pair clean air with convenience

A smart air purifier is just like a regular air purifier, but with the added conveniences of an app, voice control, and smart home integration. We’ve tested and researched 66 air purifiers in The Lab and at home since 2022 from top brands like Levoit, Coway, Dyson, Blueair, and Rabbit Air. During testing, we’ve collected very detailed insights on particulate levels, energy consumption, and overall design, and observed how they hold up to real-life usage over time.

Your air purifier will be most effective if it has the filter (or filters) that targets the exact pollutants in your air, whether it’s smart or not. The beauty and intrigue of smart air purifiers is that they allow you to change and monitor settings, set schedules, and know when your filters need replacing or general maintenance—all from a distance. With a connected app, you can also typically see insights on your home’s air quality at any given time. 

“That data allows you to basically look at what’s happening in your space and, ultimately, it should allow you to change [your] behavior,” stresses Vinny Lobdell, the founder and former president of the Healthway family of brands and Intellipure, IncThis could mean closing your windows during allergy season to block out pollen, or simply upping your air purifier’s level so that it cleans quickly and more powerfully. Regular air purifiers don’t give you the same kind of data or control, which is why you may opt for something smart.

Our favorite smart air purifiers that we tested provide the whole package: easy-to-use, intuitive features, effectiveness, and design.

Editor’s Note: This story was revised in December 2023, based on our latest testing.

The Coway Airmega

The Spruce / Henry Wortock

We had the unique opportunity to test the Coway Airmega IconS in one of our homes for five months, and its performance did not disappoint. While our testing for this model was not as controlled as it would have been in our lab, our team member said she not only experienced diminished allergy and asthma symptoms, but smells also dissipated much faster with this air purifier in her home. Plus, the IconS is loaded with smart features that set it apart from other models we’ve tested over the years.

This air purifier has an integrated touchscreen display that allows you to easily adjust the fan levels, check the connectivity status, and change the light display. Plus, this air purifier has a wireless phone charging dock, so consider it a multipurpose appliance as well. We even noted that we were surprised by how often we used this feature over the testing period. You can also connect your Amazon Alexa or Google Home Assistant to control this air purifier via voice commands and adjust its settings. The IoCare app also offers a convenient way to remotely monitor your home’s air quality levels. You can also check your air’s status at a glance, thanks to a color-coded light display on the top of the air purifier. We will note that we had some initial frustrations trying to connect this air purifier to our home Wi-Fi. However, we were able to resolve the issue and haven’t had any connection issues since.

When operating on its smart mode, this model will automatically adjust fan settings based on the room’s air quality, which optimizes energy efficiency without compromising the purifying power. We also love the sleep mode feature, which will automatically dim the lights on the unit and reduce its noise production when it detects that the lights in a room have been off for three minutes. All of these features do come at a high price of just under $700. While we recognize this model may be too expensive for smaller households, it’s not only an effective option to have in your home, but it’s also aesthetically pleasing and will easily blend into any space.

Dimensions: 22.3 x 8.8 x 21.4 inches | Coverage Area: 649 square feet Filter Type: Green True HEPA | CADR Rating: 173 (smoke), 194.1 (dust), and 235.3 (pollen) Works With: Amazon Alexa and Google Home Assistant

 
Person pressing a button on Coway Airmega 400S Smart Air Purifier

Better Homes & Gardens / Henry Wortock

The Coway Airmega 400S Smart Air Purifier earns our second-best overall spot based on its well-rounded feature set. Formerly our Best Overall pick, this model was just slightly beat out by the newer Coway Airmega IconS. However, this model still comes in a sleeker design than other purifiers, covers larger rooms with a 1,560-square-foot coverage area, and includes a three-stage True HEPA system. Additionally, it offers a convenient app—along with Google Assistant and Amazon Alexa voice connectivity for remote control and monitoring.

After both lab and long-term home testing, we gave it a perfect rating for setup, noting that the pictures in the instruction manual were easy to follow and that downloading the companion app was straightforward. The app allows you to view air quality, choose one of four fan settings, manage scheduling, and turn the machine’s light on or off. You can also keep an eye on the filter’s lifespan from the mobile app. This air purifier has a sleep mode, too, which reduces the noise level and distractions at bedtime. An eco mode activates to conserve energy after the air purifier senses smart mode has done an effective job of cleaning the air, as well.

When put to the test in the lab, the Coway Airmega 400S’s multi-stage filtration system delivered impressive results overall. This model uses a pre-filter to capture pet hair and dust, an activated carbon filter to trap odors and volatile organic compounds (VOCs), and a True Green HEPA H13 filter (an environmentally-friendly version of a True HEPA filter) to keep bacteria and viruses at bay. It performed superbly at its lowest speed to filter pet hair and smoke, and even better on high mode. However, when testing the air purifier’s VOC-filtering abilities in the lab, the low mode proved much less effective than the high mode.

The high mode was also noticeably louder, as many air purifiers are when working harder. Though this model has a larger build than some alternatives, its coverage area, performance, and connectivity make it a useful and compelling choice as a daily air purifying tool at home.

How It Performed Long-Term

After six months of use, our real-world testing revealed the app is convenient for controlling and monitoring this device, over the touch controls on the machine. We also appreciated—and primarily used—this model’s smart mode, which changes the fan’s speed automatically based on the air quality.

Dimensions: 14.8 x 14.8 x 22.8 inches | Coverage Area: 1,560 square feet | Filter Type: True HEPA H13 | CADR Rating: 328 (smoke), 328 (dust), 400 (pollen) Works With: Amazon Alexa, Google Assistant

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