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 HEPA filter is composed of a mesh of fiberglass fibers that are randomly arranged to trap large particles, as well as microscopic elements. HEPA filters are not only used in air filtration systems, but it has found great use and advantage in 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.
For the conventional vacuum filters, they work like a sieve where small size particles, smaller than the sieve’s opening diameters, can pass through, of which in contrast HEPA vacuums do not do that, since 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. HEPA filters are so designed to remove 99.97% of all particles greater than 0.3 microns, such that when compared to pollutants’ size like a dust mite, which is 5 microns, and a human hair, which is 40 microns, this is just giving the idea of how small of particles a HEPA filter collects, and that 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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Due to the fact that there is an increase spread of fake or imitation HEPA filter vacuum cleaners in the market, one must be extra cautious in purchasing HEPA filter vacuum cleaner, so these are guidelines for you to observe and check, when you plan to buy a 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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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.
By preventing the emission of very minute impurities and other contaminants, like dust, smoke, mold, bacteria, and pollen, back into the air we breathe, the HEPA filter vacuum cleaner has proved its beneficial use in the home and office.