“I wanted to find a very low-cost way to help millions in need,” Dr. Guihua Yu tells PEOPLE Courtesy Jack Myer/The University of Texas at Austin Growing up in rural southeast China, Dr. Guihua Yu ...

The best air purifiers suck up particles, filter the potentially hazardous ones, and blow fresh air into your room. Our editors have all tested various air purifiers over the past few years, and we’ve ...

HEPA filters have become an increasingly common option in smart homes for those who really, really want to make sure they’re removing every bit of allergen or potential infectious particle. Often ...

When tested against particles from wildfires (where are larger, often 2.5 microns), the special fabric pre-filter could also remove up to 99% of them within 60 minutes. This combination of filters ...