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The 16 Best Air Purifiers of 2024, Tested and Reviewed

Clean indoor air can be hard to come by, as pollutants such as smoke, mold, bacteria, pollen, and toxins all battle to infiltrate the air we breathe. Air filtration has become more relevant than ever, and an air purifier is one of the easiest and most effective ways to bring fresh air back into your home.

We put 67 of the best air purifiers through a series of tests in our Des Moines lab, and we tested the top performers again in our homes over a six-month span, assessing them on their design, noise levels, features, effectiveness, and overall value. We also consulted Kenneth Mendez, CEO and president of the Asthma and Allergy Foundation of America (AAFA), Dr. John McKeon, CEO of Allergy Standards, and Melanie Carver, chief mission officer at the AAFA, for expert insight into how air purifiers improve indoor air quality.

What Stands Out

  • You can connect it to Google Assistant or Amazon Alexa for easy access to air quality data.

What Could Be Improved

  • The replacement HEPA filters are pricey. 

This air purifier was one of the most effective we tested for filtering particulate matter (PM), including smoke and pet hair, as well as volatile organic compounds (VOCs), specifically those emitted from mothballs. It even helped to rid a persistent musty smell from an entryway, qualifying it as one of our Very Best Products of 2024. The Levoit Core 400S achieves these results with the help of three different filters: an activated carbon filter for absorbing VOCs and odors, a HEPA filter for allergens and other air pollutants, and a preliminary filter for large debris such as dust, lint, hair, pet fur, and more.

The unit itself comes fully assembled and is designed for use in a space up to 400 square feet, with the help of its 360-degree air intake. It’s lightweight enough to carry from room to room and comes equipped with handles on either side for easy transport. We were particularly impressed with its quiet operation—the decibel level in the room didn’t increase at all on the sleep or quiet modes, nor did it disturb us while we slept.

In addition to its impressive performance, this air purifier boasts a number of advanced features, including Wi-Fi compatibility, so you can control it from an app or smart home device, such as Google Assistant or Amazon Alexa—all of which we found easy to use with the air purifier. The easy-to-read digital display gives you a real-time reading of your air quality and automatically adjusts your fan speed to match. This model is available in white and black, both with the sleek, cylindrical design that can be placed on the floor or on a table.

Our one complaint is the price of the corresponding HEPA replacement filters—the brand recommends replacing them every six to 12 months. But considering their performance in our testing, it may be worth the splurge for cleaner indoor air.

Dimensions: 10.8 x 10.8 x 20.5 inches | Weight: 14.1 pounds | Room Size: 403 square feet | CADR: 260 CFM | Certifications: Energy Star, ETL Listed

Person pressing control panel buttons on Levoit Core 400S Smart True HEPA Air Purifier

Wade Review / Henry Wortock



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