Abstract: A filter unit with a filter element receptacle and a filter element, where the filter element having a filter element box in which is inserted a filter pack or a filter medium. The filter element box has a filter element cover on which there is a peripheral projection which engages in a corresponding taper on the filter element box. In addition, the filter element can be inserted into the filter element receptacle which engages with a sealing effect in at least one corresponding packing groove of the filter element cover or box with at least one sealing web molded onto it.

Abstract: The invention relates to an air purification apparatus substantially comprising a suction part, a ventilator housing with one or several ventilators and one or more air filters disposed before or after the ventilator, wherein a housing implemented with a base comprises modular function parts disposed tower-like one above the other, one engaging the other in sealing fit and readily detachable one from the other and at least one pivoted lever disposed pivotably on the lateral portion of the housing by means of a pivot receptor in the direction of the arrow and extending over all parts of the housing from the outside and clamping them together. The air purification apparatus additionally fastenable on the ceiling is usable in particular as spot suction, as ventilation or overpressure or as clean-air purification apparatus.