Cabinet housing for receiving a plurality of insertion components and rack housing with the housing cabinet and an exhaust unit

The invention relates to a rack housing (1) for receiving a plurality of insertion component (15). The rack housing (1) comprises a plurality of insertion positions (7) for receiving the plurality of insertion components (15) adjacent in one of a first housing, the first region (5) of the rack enclosure. The rack housing (1) further comprises a sub-pressure shaft (11) in a to the first region (5) adjacent the second region (6) of the rack enclosure (1), wherein between the vacuum shaft (11) and the insertion component (15) first openings ( 22) are provided which allow the removal of (components through the insertion 15) of heated air in the vacuum shaft (11). The rack housing (1) comprises at least two second openings (8) for exhausting the heated air from the vacuum shaft (11), at least two, arranged in the vacuum slot (11) and the two second apertures (8) associated with non-return devices (12) provided are to prevent the entry of air through the respective associated second opening (8) when no air is sucked off through said second opening (8).