At its simplest, an air purifier is an indoor device that traps and filters harmful particles and releases fresh and cleaner air afterward. Most air purifiers have been proven can effectively remove indoor pollutants such as bacteria, dust, pollen, odor, pet dander, to name a few. An air purifier is made up of a filter, motor/fan and hous... ing. All have these 3 components. An air purifier circulates the air in a room and captures the particles and gases in the filters. For an air purifier to work well it needs to move enough air and it needs to have high efficiency filters.HEPA is a type of pleated mechanical air filter. It is an acronym for "high efficiency particulate air [filter]" (as officially defined by the U.S. Dept. of Energy).+ More
