Air Purifier Technologies: HEPA Filter

HEPA (High Efficiency Particulate Air) filter material was first invented in the 1940’s and used during World War II by the United States Government. It is used in the Manhattan Project to stop the radioactive particles from escaping out of the scientific and military laboratories. HEPA filters are composed of microfibers that are between 0.5 and 2.0 microns (one-millionth of a metre) in diameter and randomly arranged to form flat sheets. Microfibers... Read More