What Are the Efficiency Levels of Pocket Air Filters?
The efficiency levels of Pocket Air Filters are mainly classified according to international general standards, with the core distinction based on their ability to filter dust particles of different sizes. The common levels include primary efficiency, medium efficiency, high-medium efficiency, and sub-high efficiency.
Preliminary Efficiency Pocket Filters have relatively low filtration efficiency. They mainly filter dust particles with a size of ≥5μm, and their efficiency range is usually 40%-60%. These filters are mostly used as pre-filtration in air purification systems to protect subsequent high-precision filters, and are commonly applied in fresh air pre-treatment in places such as factory workshops and shopping malls.
Medium Efficiency Pocket Filters can filter dust particles with a size of ≥1μm, and their efficiency ranges from 60% to 90%. They are often installed after primary efficiency filters to further purify the air, and are suitable for scenarios with certain cleanliness requirements, such as office buildings, general wards of hospitals, and food processing workshops.
High-medium efficiency Pocket Air Filters have higher filtration precision. They can filter dust particles with a size of ≥0.5μm, with an efficiency of 90%-99%. They are mostly used in general clean areas of electronics factories and pharmaceutical factories, or as pre-protection for high-efficiency filters to reduce the load on high-efficiency filters.
Sub-high efficiency Pocket Air Filters can filter dust particles with a size of ≥0.3μm, with an efficiency of 99%-99.9%, which is close to the level of high-efficiency filters. They are suitable for places with high cleanliness requirements, such as hospital operating rooms and precision electronics workshops, and can replace low-efficiency high-efficiency filters in some scenarios.
