Company founded
2006
A. HEPA (High Efficiency Particulate Air) filters can remove at least 99.97 percent of airborne particles 0.3 micrometers (µm) in diameter. Particles of this size are the most difficult to filter and are thus considered the most penetrating particle size. Particles that are larger or smaller are filtered with even higher efficiency. Many vacuum cleaner manufacturers provide filter bags that can be used in their models to provide this level of filtration.