Indoor HEPA filters significantly reduce pollution indoors when outside air unhealthy, study finds — ScienceDaily

Outdoor air pollution is a major contributor to indoor air pollution — but high-efficiency particulate air (HEPA) filters used in the home significantly reduce fine-particulate matter in the air compared with non-HEPA air filters, according to a new two-year study led by researchers at Intermountain Healthcare in Salt Lake City. For the study, researchers monitored […]