In fact, the purpose of using HEPA filters is to filter particles from the air. For example: pollen, dust, smoke, coal ash, oil mist, bacteria, oil fume, smoke, metal powder, virus, carbon black and so on. Removing these particles has different benefits for the human body, such as: it can improve indoor particle conditions, create a healthy breathing environment, reduce the incidence of allergic asthma and skin allergic diseases, facilitate the filtration of viruses and bacteria, reduce the risk of disease, etc. Wait.

According to the general EN1822-2009 standard in Europe and the United States, HEPA filters have two filtration levels: H13 and H14.

H13 HEPA filters 99.95%, transmittance 0.05%;

H14 filtration efficiency 99.995%, transmittance 0.005%;

And for civilian-grade air purifiers, the filtering effect of H13 HEPA filters is generally sufficient. There are also high ones, such as: HEPA filter grade above is called ULPA filter, it is called ultra-efficient air filter, there are three grades of U15, U16, U17, this type of filter is mainly used in industry, aviation, military, etc. field.

And for high-quality air purifiers, high-efficiency air filters are clearly not enough, especially in today's haze of outbreaks. Therefore, many air purifier manufacturers also use a layer of sterilization and detoxification technology after the HEPA filter. For example, the use of high-energy ultraviolet sterilization and detoxification technology or some company's own technology. The purpose is to kill the filtered bacteria and viruses as much as possible, not just filtering, but also greatly reduce the chance of secondary pollution. And if you want to choose this type of product, you must first check some international and domestic authoritative certifications, so as not to be too different from your purchase expectations. In addition, the filtration effect of HEPA filters does not contain harmful gases. To comprehensively purify indoor air quality, it is necessary to consider whether the air purifier contains harmful gases.

HEPA filters manufacturers
H13 HEPA filters manufacturers