SK Blue e+ outlet filter, for filter fan 3237.7xx, WH: 116.5 x 116.5 mm, RAL 7035, Blue e+ outlet filter, Plastic, RAL 7035, Outlet Filters Chopped fiber filter mat, 116.5 mm, 116.5 mm, 33.2 mm, 4.59 in, 4.59 in, 1.31 in, IP 54 with fleece filter | IP 56 with fleece filter and hose-proof hood, Type 12 with fleece filter | Type 3, 3R with fleece filter and hose-proof hood, 39269097, 1 pc(s), 0.265 lbs, 4028177998438, The outlet filter is used in conjunction with the associated filter fan to dissipate lost heat out of the enclosures, to ventilate the enclosure and to protect temperature-sensitive components. This is done via the direct supply of ambient air that must be below the permissible temperature inside the enclosure.