Sub Hepa Filter

The Sub-HEPA Filter is an air filtration device with a filtration efficiency that falls between high-efficiency and medium-efficiency levels. According to national standards, the atmospheric dust counting efficiency of a sub-HEPA filter for particles with a diameter of a Y0.5I m should be a Y95% and <99.9%. This type of filter is commonly used in situations requiring higher air purification standards but does not need to meet the strict requirements of HEPA level.

Structure And Materials
The structure of a sub-HEPA filter typically consists of filter material, an outer frame, and sealing components. The filter material is the core component of the filter, and its material and performance directly affect the filtration efficiency and service life of the filter. Common filter materials include glass fiber paper, ultrafine polypropylene fiber paper, etc. The outer frame is used to support the filter material and maintain its stable shape, with common materials including wood, metal galvanized steel plate, etc. Sealing components are used to ensure the seal between the filter and the installation frame, preventing the bypass of unfiltered air.