custom size air filter, coarse dust filter，PanelAirFilter #PrimaryPreFilter #HVACPreFilter #BuildingVentilation #CentralAirFilter

Our paper frame primary panel filter is a universal pre-filtration component widely used in central air conditioning, AHU and ventilation systems. It is built with rigid cardboard frame and reinforced synthetic fiber filter media with supporting mesh, keeping shape stable under continuous airflow. It serves as the first defense for air systems, trapping pollen, debris and coarse dust to safeguard expensive downstream filters. It is widely adopted in hotels, shopping malls, hospitals, factories and data center air conditioning systems. We support custom sizes and different efficiency grades for engineering projects.