1. Air filters are classified according to their filtration level as follows: pre-filters, medium-efficiency filters, and high-efficiency filters;
2. Pre-filters are generally used for dust removal and filtration, and high-temperature ovens in automotive painting plants; medium-efficiency filters are generally used in central air conditioning and centralized ventilation systems; high-efficiency filters are generally used in cleanroom projects in various industries, as well as air conditioning and process air supply systems with special requirements.