UL/ROSH/ISO efficiency over 99.5% promptly delivery long service lifetime The panel filter is used in the central air-conditioners and centralized ventilation systems.Excellent nonwoven used as the filter material.Aluminum alloy frame, simple and utility, easy to replaceWashable, can be circularly used, long life and economicalFiltration efficiency class: G2,G3,G4,F5,F6,F7,F8(EN 779)Different ...