Air filter classification specialized for laboratory animal facility air purification. Dedicated filters used in animal testing laboratories of pharmaceutical, chemical, and food manufacturers' R&D departments and university research institutions for maintaining experimental animal health and ensuring research environment cleanliness. Includes HEPA filters, ULPA filters, pre-filters, activated carbon filters, medium-efficiency filters, etc. Compatible with animal cage ventilation systems, clean benches, biosafety cabinets, and breeding room ventilation equipment. High-performance filters necessary for establishing clean environments compliant with GLP standards and animal welfare laws. Experimental animal-specific design with dust removal, bacteria removal, and odor removal functions. Professional filters specialized for experimental animal physiological requirements and research accuracy assurance, distinguished from general HVAC filters and industrial dust collection filters.