What directive does en779 belong to EU certification? The European standard for the new air filter (EN779: 2012) came into effect on 2012.The purpose is to classify the air filter according to its minimum filtration efficiency,The minimum filtering efficiency is also called ME (minimum efficiency ).The new bid is a measure we welcome,It is also a step to achieve a better indoor environment.The new standards will help eliminate some problems.One of them is a chemical fiber filter with static electricity.Although this filter shows good initial filtration efficiency,But their static electricity disappears very quickly,This has dramatically reduced the capacity of air filters to purify the air.Unfortunately,One of the results of the above situation is that a very large number of European companies now use the F7 class filter with a minimum efficiency of between 5% and 10%.That means,Up to 90% to 95% of the pollutants in the outdoor air can enter the building and pollute the indoor environment.C
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How to make a sewage purifier? Purifier????It mainly depends on what kind of water quality determines the process of purifying water according to the water quality,If you are a purifier, you can try to choose the process with direct effect.As simple as possible, convenient and convenient maintenance process.
