The Advantages of HEPA Filter-Vacuum Cleaners
During World War II, the High Efficiency Particulate Air (HEPA) filters were invented 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. Nowadays, the use of HEPA filters has been beneficial not only in air filtration systems, but also 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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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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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. When another batch of dust particles return through the air flow, the HEPA filters can still trap these particles, 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.