A HEPA filter is theoretically rated to capture at least 99.97 percent of the size of particles that dust can be. A high-quality air purifier can ... replacements and energy to run the machine ...

This 4.5-star-rated air purifier is $40 at Walmart ... quiet options for our best air purifier list. Lastly, Energy Star-certified air purifiers will have the lowest impact on your energy bill.

Discover how air purifiers can ease your allergy symptoms, what features to look for, and the best models to keep your home's air clean and comfortable.

Best overall The best air purifier overall in our tests, we recommend this model above all others because it gets the job done quickly and efficiently, saves energy and works well in large spaces.