The best air purifiers for your home - Popular Science The best air purifiers for your home - Popular Science Posted: 18 Apr 2019 10:15 AM PDT After more than a year of construction on my apartment, I started noticing particles floating around my bedroom. Not long after, it occurred to me that poor air quality could partially explain my sleep troubles. I decided to test out some air purifiers to see if they make a difference. They really did. The best air purifiers can improve sleep and alleviate allergies by removing particulates from the air. Most high-end models use True HEPA filters—High Efficiency Particulate Air—to catch floating bits of mold and pollen, as well as suck up smoke, dust, and bacteria. These certified filters cleanse the air of 99.97 percent of small particles (as tiny as 0.3 microns in diameter) on the first round of filtration. These purifiers do not handle heavier particles that have settled on your furniture, so yo...