HEPA


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HEPA-filter

HEPA stands for High Efficient Particulate Air (Arrestance) or in other words, they filter out sub-micron particles as they clean.

Many high-quality vacuum cleaners and air purifiers use HEPA filters as part of their filtration systems. This is beneficial for asthma and allergy sufferers, because the HEPA filter traps the fine particles (such as pollen and dust mite feces) which trigger allergy and asthma symptoms. For a HEPA filter in a vacuum cleaner to be effective, the vacuum cleaner must be designed so that all the air drawn into the machine is expelled through the filter, with none of the air leaking past it. This is often referred to as “Sealed HEPA” or sometimes the more vague “True HEPA.” Vacuum cleaners simply labeled HEPA have a HEPA filter, but not all air necessarily passes through it.

Finally, vacuum cleaner filters marketed as “HEPA-like” will typically use a filter of a similar construction to HEPA, but without the filtering efficiency. Because of the extra density of a HEPA filter, HEPA vacuum cleaners require more powerful motors to provide adequate cleaning power.

When purchasing a HEPA vacuum or air-purifier, it is important to read the specifications for the HEPA filtration to assure that the appliance uses a True-HEPA filter capable of filtration to 99.97% at 0.3 microns. If the HEPA filter in question does not list these specifications, then keep shopping for one that does.

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