A filter of the actual life of the filter refers to the rated efficiency in maintaining the premise, to a certain resistance to the use of time; if a filter can not be used in the process to maintain a certain filtration efficiency, then there is nothing Service life.
Air filter efficiency, the so-called filter classification efficiency, refers to a certain detection method in the premise of the air filter filtration efficiency of a classification method. Different filter detection method, the same kind of filter filter efficiency will be different, the classification level will be differentiated. At present in the world by more and more countries to adopt the standard coarse (early), the effect of the filter is the European standard EN799, for high efficiency filter is the European standard EN1822. China’s current national standard manufacturers rarely used.
The efficiency of the filter can only be detected by the detection, the domestic general coarse, medium and high efficiency filter in the sealed case, according to the efficiency of the filter provided by the supplier to set the finished product efficiency. Sub-efficient, efficient must be tested by Taiwan, qualified products to the factory