Abstract: A wall (100) serves to separate two rooms (200,300) at different temperatures and has a plurality of essentially parallel tubular sections (11) which conduct a fluid medium, said sections being enclosed between two plate-like parts (2,3) and connected in a heat-conducting manner to at least one of the said parts. The two plate-like parts (2,3) are rigidly interconnected along an interface (50) essentially parallel to the two principal directions of the wall (100). The interface (50) is arranged so as to lie outside the external contour of the tubular sections 11). The plate-like part (3) containing the tubular sections faces the room (300) at the higher temperature.