| abstract |
A brick (20) has a top (21), a bottom (22), two narrow sides (25, 26), a back (24) and a head (23). The brick according to the invention is a facing brick, such as a brick or clinker, and has a recess (30) in which a pipe (31) is arranged, which is traversed by a fluid. The recess preferably has the shape of a groove and is formed parallel to the head side horizontally in the top of the facing brick, so that with this an outer wall of a building (10) can be constructed to supply available by solar energy in the fluid heat exchange device. |