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How do HEPA Filters work?

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HEPA filters, short for High-Efficiency Particulate Air filters, were originally developed by the Atomic Energy Commission to remove radioactive dust from their manufacturing plants and are currently recommended by the U.S. Department of Homeland Security. They are made from very tiny glass fibers that are tightly woven into a very absorbent air filter. Studies indicate that HEPA filters are 99.97% effective in capturing harmful airborne particles as small as 0.3 microns, i.e., 300 times smaller than the width of a single human hair. While HEPA filters are very effective against most solids and many biological agents as stated above, they are not particularly effective against odors, gases and gaseous particles. This is were the Activated Carbon Filters come in. Ultraviolet Light Air Purification: [top of page] The Advanced Ultra-Pure 9-Stage Air Shield Air Purifier is also equipped with Ultraviolet Light Air Purification to kill airborne microbes. UV light is highly effective in ... more
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HEPA filters, short for High-Efficiency Particulate Air filters, were originally developed by the Atomic Energy Commission to remove radioactive dust from their manufacturing plants and are currently recommended by the U.S. Department of Homeland Security. They are made from very tiny glass fibers that are tightly woven into a very absorbent air filter. Studies indicate that HEPA filters are 99.97% effective in capturing harmful airborne particles as small as 0.3 microns, i.e., 300 times smaller than the width of a single human hair. While HEPA filters are very effective against most solids and many biological agents as stated above, they are not particularly effective against odors, gases and gaseous particles. This is were the Activated Carbon Filters come in. Ultraviolet Light Air Purification: [top of page] The Advanced Ultra-Pure 9-Stage Air Shield Air Purifier is also equipped with Ultraviolet Light Air Purification to kill airborne microbes. UV light is highly effective in ... more
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HEPA filters, short for High-Efficiency Particulate Air filters, were originally developed by the Atomic Energy Commission to remove radioactive dust from their manufacturing plants and are currently recommended by the U.S. Department of Homeland Security. They are made from very tiny glass fibers that are tightly woven into a very absorbent air filter. Studies indicate that HEPA filters are 99.97% effective in capturing harmful airborne particles as small as 0.3 microns, i.e., 300 times smaller than the width of a single human hair. more
ultra-pureair.com
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HEPA stand for "high efficiency particulate air". Put simply a HEPA filter is a type of filter that can catch a large amount of very particulate matter. HEPA air filters stop mold spores as well as many bacteria and viruses and of course larger items such as dust. (HEPA filters on their own do not remove odours, chemicals or gasses - therefore typical tools that utilise HEPA virus usually have an activated carbon based filter as well to absorb odours and chemicals). more
hepavacuumcleaner.info

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