How to choose a better high-quality HEPA component filter is very important for users. After all, the filtering effect of a high-quality HEPA component filter directly determines the cleanliness level of the clean room.

　　1) High-quality HEPA component filters are mainly used in clean rooms. HEPA composition filter is mainly because its efficiency is difficult to detect, and it needs to be detected by a professional dust particle counter.

　　2) The traditional method for the detection of high-quality HEPA component filters is to use DOP, which is an oily liquid plastic. It is heated and condensed into droplets of 0.3 μm. Its filtering efficiency is determined by a light diffusing mirror.

　　3) Medium-efficiency filter: The most medium-efficiency filters are bag-type. It is also generally made of glass wool. Not all tests are required. The size is recommended to be 24 inches X 24 inches, so as to better match the high-quality HEPA composition filter.

　　4) Clean room:

　　Class 10,000 and class 100,000 clean rooms generally use the same high-quality HEPA composition filter, but the number of air changes and the ratio of fresh air are different. Such clean rooms generally rarely use fresh air systems.