Coarse pleated panel filters are designed for use as pre-filters and for exhaust air applications in air handling units and HVAC systems, as well as in commercial and industrial settings. They are graded as Coarse 80% in compliance with the ISO 16890 standard, which corresponds to the former EN 779 G4–F5 grade. These filters effectively remove larger particles, such as dust, lint, and pollen, extending the lifespan of fine filters and protecting system components.