The HEPA filter belong to the pleated mechanical air filter. The HEPA refers to the “high efficiency particulate air”. This type of filter is specially designed to deal with the particles in the air, like the dust, pollen, mold, bacteria and other particles with the size of 0.3 microns (µm). The filtration efficiency can reach 99.97%.

There are many types of the pleated mechanical air filter, the HEPA pleated filter is one of them. The HEPA filter is an acronym for high efficiency particular air. The filtration efficiency can reach 99.97%, it can remove most pollen, dust, mold, bacteria and 0.3 microns particulars.

Yitong primary efficiency filters are used for primary filtration of air conditioning and ventilation systems. The filter material is non-woven, which can block particles above 5 microns. It has the advantages of large flow, large dirt holding capacity and small flow resistance. Inexpensive and econ