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Knowing More on HEPA Filter-Vacuum Cleaners High Efficiency Particulate Air (HEPA) filters were invented in World War II for the purpose of preventing 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. Having a HEPA filtered vacuum has greatly improved the indoor air quality, thereby eliminating at a high percentage the elements that can cause allergy and asthma. In comparison between the conventional vacuum filters to HEPA filters, the conventional vacuum filters perform as a sieve and small size particles that are much smaller than the sieve’s diameter opening can pass through it, while with HEPA filters, they are designed to trap the smallest pollutants when air is forced through the fiberglass mesh, thereby, 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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Because of the proliferation of imitation HEPA filter vacuum cleaners in the market, the following are check guides to keep in mind so you can be sure that the vacuum cleaner you are purchasing contains a true HEPA filter: 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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Further, to achieve an effective HEPA filtration system, the unit must be sealed so that there is no air flow around the filter, and if it is 100% sealed, it 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 proved its beneficial use in the home and office, since it can prevent 99.97% the emission of very minute impurities and other contaminants, like dust, smoke, mold, bacteria, and pollen, back into the air we breathe.