HEPA filters are available in four styles: plate type, folding type, bag type and box type. The outer frame materials include paper frame, aluminum alloy frame, galvanized iron frame, and stainless steel frame. The filter materials include non-woven fabric, nylon mesh, activated carbon filter cotton, metal Hole nets, etc., protective nets include double-sided sprayed wire mesh and double-sided galvanized wire mesh. Inexpensive, lightweight, versatile and compact.

HEPA filters are suitable for central air-conditioning vacuum cleaner filter and dryer lint filters; large-scale air compressor filtration; return air system; pre-filtering system for medium-efficiency and high-efficiency filtration devices. Cardboard frame filters are used in air conditioning units with less pollutants and are not suitable for fresh air filtration; they are not washable and cannot be reused. Filter frame non-woven plate and frame filter is suitable for fresh air filtration with serious air pollutants, non-woven folded filtration, large dirt holding capacity, and can be washed with water. Secondly, the cleanable metal filter element adopts aluminum mesh or stainless steel mesh as the filter material, which can be used to filter the primary front end with serious air pollution, and can be cleaned repeatedly to prolong the service life.