Housing made of galvanized sheet steel with connection flange on both sides for installation in the duct. Lid can be opened or removed using quick-release fasteners to remove the filter. Pocket filter cassette on a supporting frame for high dust absorption, large-area dimension. Filter made of regenerable synthetic fiber, class G 4, strongly reinforced, 190 g/m². DIN 53438 F1, self-extinguishing. Separation efficiency: 91.3%, dust storage: 354 g/m². Can be installed in any position.