Abstract: A heat exchanger element has a heat-conducting body and a heat-transfer fluid pipe embedded in ducts having a channel-shaped locating section and two tabs connected flat to the heat-conducting body. To produce the heat exchanger element, foil strips are pressed into grooves so that they each form a section pressed into the grooves in a channel-like manner and laterally projecting tabs. A building panel has a heat exchanger element with a heat exchange surface, a cooling device and a collecting device, the cooling device being designed to cool the heat exchange surface in contact with the ambient air to a temperature below the dew point of the water vapour in the ambient air.

Abstract: A heat exchanger element (1) has a heat-conducting body (2) and a heat-transfer fluid pipe (8) which is connected thereto in a heat-conducting manner and which are embedded in sections in ducts (5) of heat-conducting material in heat-conducting contact, the ducts (5) having a channel-shaped locating section (7) and two tabs (6) connected thereto, so that the ducts (5) are approximately ?-shaped in cross-section, and wherein the tabs (6) are connected flat to the heat-conducting body (2) in order to establish the heat-conducting connection of the heat-conducting fluid pipe (8) to the heat-conducting body (2). To produce the heat exchanger element (1), foil strips are pressed into grooves so that they each form a section (7) pressed into the grooves (23) in a channel-like manner and laterally projecting tabs (6); sections of a heat transfer fluid pipe (8) are inserted into the channel-like sections (7) of the foil strips; and the tabs (6) are connected flat to a heat transfer body (2).