We spend 90% of our time indoors, according to the Asthma and Allergy Foundation of America, and our indoor environment can have all sorts of allergens and other irritants. That includes mold, pet dander, dust, and chemical emissions from everyday household products. In fact, the EPA estimates indoor air may be two to five times more polluted than outdoor levels.
We tested 30 models (details on our testing methods here) and consulted three experts to determine the best air purifiers. All of the units we recommend performed well in our tests, are easy to use, and have reasonable long-term filter replacement and energy use costs.