Do you know the EN1822 universal filter ?

LENGE Purification is a high-tech enterprise integrating R & D, production, sales and testing, specializing in purification and filtration equipment manufacturing for more than 20 years. The company's products cover purification equipment, primary efficiency, fine filter & High Efficiency Particulate Air(HEPA) filter, stainless steel appliances and pleated filter cartridges and other high-tech products. And the EN1822 universal filters is also very good. At present, many consumers are easy to fall into a misunderstanding when buying air purifiers: the higher the filter grade, the better. Therefore, it is necessary to reshape the correct concept of filter screen grade.

First, we need to explain the H13 concept abused by many businesses. In fact, H13 comes from European standard EN1822 - which is a rule completely biased towards high resistance glass fiber. The mainstream filter materials used by air purifiers on the market today, such as Dongli, 3M, domestic filter materials and Korean filter materials, are electret polypropylene materials, which mainly rely on electret electric field to adsorb particles. If EN1822 certification is mandatory, the electret needs to be removed according to Appendix B of EN1822, and the original H13 filter screen immediately shrinks to F8 or even lower. Therefore, strictly speaking, it is incorrect for the manufacturer to publicize the use of "3M H13 filter screen". In fact, the electret technology greatly improves the filtering performance of the filter screen for fine particles, and can make the polypropylene fiber filter screen with extremely low resistance reach the filtering effect of H13 grade in EN1822 (that is, the filtering efficiency for the most easily permeable particles is greater than 99.95% under the rated air volume) Basically, all air purifiers on the market are using electret technology, which is completely beneficial to consumers and air purifiers. However, it has been wiped out by the ruthless EN1822. In short, EN1822 is a standard applicable to clean rooms and ventilation systems. This standard has a persistent demand for single filtration efficiency and does not allow the single filtration efficiency to be reduced However, it is very tolerant of resistance, but it is a pity that EN1822 is not applicable to household air purifiers that emphasize cycle times and filter resistance, nor is it a standard implemented in the air purifier industry. Ironically, the term "H13" in such a standard "Has become a conventional concept - although it is clear in the industry that polypropylene filter screen is so-called" H13 "in strict accordance with EN1822 It's not really H13. In fact, if you really use the old glass fiber filter paper of H13, consumers will suffer. The air purifier at home will become a behemoth, the power consumption will deter consumers, the noise will make people unable to sleep, the purification effect will be greatly reduced, and the air purifier industry will go back to the distant glass fiber era.

In addition, it should be noted that according to EN1822, The filter screen grade is actually linked to the rated air volume, because the larger the air volume, the lower the filtration efficiency. For example, a Swiss brand declares that its filter screen is H12 / H13 grade, and its maximum air volume is only 440m3 / h. If we change a fan to make the air volume of this air purifier reach 880m3 / h, can its filter screen reach H13 grade? It's impossible, because With the increase of wind speed, the filtration efficiency will be lower than 99.95%. Similarly, according to this logic, when the rated wind speed is low enough, some filtration efficiency can claim to reach H13 standard without 99.95% filter screen at high wind speed. Therefore, as consumers, we should understand that the filter screen grade is not a constant constant, independent of the air volume (the air volume is linked to Cadr, which will be discussed later) It is meaningless to talk about the filter grade of the filter screen.

Finally, consumers accepted the one-sided idea that the bigger the X, the better. However, high filter screen grade is not enough. High filter screen grade and large air volume V are really good. Many machines pursue the maximization of X and sacrifice V, such as those that unilaterally emphasize the "H13" filter screen and completely ignore Cadr. Of course, there are also machines that do not consider x at all. So what is the consequence of completely ignoring x? Short life, yes, X is related to life. The representative works are five folding filter papers presented by a Japanese brand. It is said that one can be used for five years. In fact, five will die in a year. To make some digressions, the service life is not only related to x, but also obviously related to the expansion area of the filter paper. It is easy to understand that the larger the expansion area of the filter paper, the more particles it can carry. When you calculate whether the filter is cost-effective or not, you can calculate the price of filter paper per square meter.

In conclusion, the selection of filter screen grade should essentially be the balance point of many factors. It is not wishful thinking that the higher the better, or the lower the better. So it's wise for you to choose LENGE company.We can not only meet your pursuit of high-quality materials, but also meet your right to pursue cost-effective affairs.