Device and method for producing and sealing a line feedthrough directly beneath a ceiling

A device for producing and sealing a line feedthrough directly beneath a room ceiling, the device comprising:

• a feedthrough box to be fastened to the room ceiling, with two opposite open end faces and side walls extending between them, which are open towards the room ceiling and are to be closed off by the room ceiling, such that the side walls in a state of the feedthrough box mounted on the room ceiling form together with the room ceiling an axial passage channel, which is closed in a circumferential direction, for routing lines through the same;
• and
• one or more support frame elements, wherein each of the one or more support frame element is integrally formed or fixed on the side walls of the feedthrough box on an outside thereof, and extends radially outwards in such a way that it forms a substantially planar bearing surface for supporting a wall panel, when a vertical wall is produced or closed off around the feedthrough box.