Ventilation and air conditioning systems in large buildings such as offices, conference rooms, hospitals, shopping malls, airports, pre-filtration of centralized ventilation and air conditioning systems in ordinary industrial plants or clean rooms; primary filtration of central air conditioners and household air conditioners, special acid and alkali resistant ventilation filtration.

Use in environments with limited air flow and high air volume; Applied to initial filtration of air conditioning systems and pre filtration of multi-stage filtration systems.