What is the reason why the air filter should be used together?

      In general, we may all think that selecting the filter with corresponding processing accuracy according to the required air quality can meet the requirements, and this can also save expenses. In fact, this idea is not completely correct. Although the processing accuracy of a single filter determines the required air quality, without the pretreatment protection of the pre-treatment lower level filter, the high-precision filter element will soon be blocked, which will speed up the replacement frequency of the filter element and increase the production cost. Therefore, the air filter should be considered to be used together.