Pfannenberg replacement filter mats provide safety against overheating, short circuits, and fire, and are crucial for daily operations. They prevent unplanned outages and the associated costs. The filter mats, in combination with Pfannenberg's patented filter fans, ensure the desired protection class IP54. Pfannenberg's fleece filter mats have the highest filter class according to DIN EN 779 and are the perfect filter medium for the majority of applications. For an even higher protection class IP55, while simultaneously increasing service life, corresponding pleated filters are available. The depicted 5-pack is suitable for the original Pfannenberg filter fans and outlet filters of size 4 (PF4x and PFA4x).