Exhaust system for installation in the floor of a room, comprehensiveA drainage system (1) having a water collection surface (2) with an aperture (3) on its upper side in the state of use, with water flowing over the water collection system in the state of use (2) to the aperture (3) and passing through the aperture (3) down through the drainage system (1),A substructure frame (4) located in the state of use of the effluent below the effluent component (1), where the water flowing from the opening (2) of the effluent component (1) can flow through the substructure frame (4) downwards, characterized by: that the chassis frame (4) is connected or connectable to the chassis component (1) via a grid connection.
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