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Knowing More on HEPA Filter-Vacuum Cleaners During World War II, when highly classified companies where dealing with radioactive materials, they introduced High Efficiency Particulate Air (HEPA) filters were invented to prevent these harmful radioactive particles from escaping in laboratories. The filter is made up of a mesh of randomly arranged fiberglass fibers that catch large particles including the microscopic ones. The efficacy of HEPA filters has been not just in air filtration systems, but more so in the technology of vacuum cleaners. The indoor air quality has greatly improved with the introduction of HEPA filter vacuum cleaners, because the technology has the efficacy of removing materials that are sources of allergy and asthma. The conventional vacuum filters function like a sieve where particles with sizes smaller than the sieve’s largest opening can pass through, but HEPA vacuums do not function that way, since they are designed to trap the smallest pollutants as air is forced through the fiberglass mesh, isolating the particles that will cling to the individual fibers. The design effectiveness of the HEPA filter is such that it can remove 99.97% of all particles greater than 0.3 microns, so dust mites which is of 5 microns size and human hair of 40 micron size are basically trapped in the HEPA mesh and it just complies better to the government standards require that particle size with an equivalent to one-thousandth of a millimeter must be filtered out of the vacuum’s exhaust.
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Genuine HEPA filter vacuum cleaners have to pass through government standard tests to guarantee that the products have all been tested and are of superior quality; therefore, the following are the ways to check if what your are buying is a genuine HEPA filter vacuum cleaner: genuine HEPA filters must pass through government standard test and the test results are printed on the filter itself, including the MERV (Minimum Efficiency Reporting Value) rating, which is an evaluation system that rates a filter’s ability to remove particles from the air based on a scale of 1-20, to which the higher the rating the higher the ability of the filter to remove smaller particles.
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It is also important that the HEPA filtering unit must be 100% sealed so that there is no air flow around the filter, and in doing so the effectiveness of the HEPA filtration system can be achieved, which prevents large amounts of particles from re-entering the surrounding air. Further return of dust particles through the air flow can be trapped by HEPA filters and thus, preventing fewer microbe dust fragments from escaping in the exhaust. The HEPA filter vacuum cleaner has proven its worth by preventing the emission of very minute impurities and other contaminants, like dust, smoke, mold, bacteria, and pollen, back into the air we breathe, and, therefore, this vacuum cleaner is beneficial in the home and office.