
G4 Pre Air Filter Initial Effect Synthetic Fiber for Ventilation System. High Efficiency Filtration: G4 grade achieves 90% efficiency for particles above 5 microns. Multiple Frame Options: Available with paper, aluminum alloy, or galvanized iron frames. Customizable Dimensions: Various standard sizes available, including 295x295mm and 595x595mm. Low Resistance Design: Engineered for low pressure drop with large filter area and high air volume. Lightweight Construction: Designed for easy handling and installation with minimal weight. ISO and CE Certified: Products pass ISO9001:2008 and CE certification standards. Versatile Applications: Suitable for HVAC, clean rooms, medical electronics, and automotive industries. Durable Materials: Constructed with synthetic fiber, cotton, and various mesh protective nets.