Abstract: The filtering ventilator (100) to be installed into the wall of a switch cabinet, in which case the mounting wall (80) is provided with a cutout (81) for the filtering ventilator (100), in which the filtering ventilator is retained and secured, which is comprised of a frame-like basic housing (10) possessing a lattice bottom (10a), a filter mat (60) inserted into the covering housing (30) mounted upon the basic housing (10) and covering the filter mat (60) and a fan motor (71) secured on the basic housing, wherein the basic housing (10), on its circumference, is provided with a screwless rapid fastening device (50) for mounting the filtering ventilator (100) in the cutout (81) of the mounting wall (80), the filtering ventilator being installable so as to be RF-shielded, is provided with a metal insert (200) connected to the basic housing (10), which is comprised of a frame (201) with a lattice bottom (202) and which is connected with the aid of screwing, riveting or clamping means to the basic housing (10) (F