HEPA - Wikipedia, the free encyclopedia

HEPA - Wikipedia, the free encyclopedia: "The original HEPA filter was designed in the 1940s and was used in the Manhattan Project to prevent the spread of airborne radioactive contaminants. It was commercialized in the 1950s, and the original term became a registered trademark and a generic term for highly efficient filters. Over the decades filters have evolved to satisfy the higher and higher demands for air quality in various high technology industries, such as aerospace, pharmaceutical processing, hospitals, health care, nuclear fuels, nuclear power, and electronic microcircuitry (computer chips)."

Al die japanners met mondkapjes (waarschijnlijk P1) zijn slecht voorzien.

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