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What is HEPA filter
2020-09-04
Since the outbreak of Novel Coronavirus Pneumonia, air purification products have become one of the most concerned products of the whole people. People always wonder whether they can remove viruses and bacteria in the indoor air by buying an air purifier and putting it at home. Generally speaking, when we buy air purification products, we will focus on the filtering effect of the matching filter. Because in our perception, the higher the filtration effect of air purification products, the better. In fact, this is not unreasonable, because the filter is the heart of the air purification system, and the quality of the filter directly affects the purification ability of the air purifier.
HEPA (High Efficiency Particulate Air) Filter, high efficiency particulate air filter. A direct translation of the definition of the U.S. Department of Energy is "a kind of disposable dry filter with rigid shell wrap, full depth folds, and expanded media. The filter has a filtration efficiency of not less than 99.97 for aerosols with a diameter of 0.3 microns in the test. %".
The HEPA high-efficiency filter is interwoven with high-density fibers. It has a strong ability to capture particles, a large adsorption capacity, and a high purification efficiency. The effect of filtering particles is very obvious. The filter that meets the HEPA high efficiency standard has a purification rate of 99.998% for 0.1 micron and 0.3 micron. If you use it to filter cigarettes, the filtration effect can reach almost 100%, because the particles in cigarettes are between 0.5 and 2 microns, which cannot pass through the HEPA filter.
HEPA (High Efficiency Particulate Air) Filter, high efficiency particulate air filter. A direct translation of the definition of the U.S. Department of Energy is "a kind of disposable dry filter with rigid shell wrap, full depth folds, and expanded media. The filter has a filtration efficiency of not less than 99.97 for aerosols with a diameter of 0.3 microns in the test. %".
The HEPA high-efficiency filter is interwoven with high-density fibers. It has a strong ability to capture particles, a large adsorption capacity, and a high purification efficiency. The effect of filtering particles is very obvious. The filter that meets the HEPA high efficiency standard has a purification rate of 99.998% for 0.1 micron and 0.3 micron. If you use it to filter cigarettes, the filtration effect can reach almost 100%, because the particles in cigarettes are between 0.5 and 2 microns, which cannot pass through the HEPA filter.
Due to the different filtering effects of different filters, the filter levels in the new fan also have a strict classification. At present, we commonly use European standards generally divided into 17 grades from G1 to U17. The best U17 grade HEPA filter has a total purification efficiency of even 99.999997%.
