The conversion plate (switching of the mounting distance from 12,5 cm to 25 cm or the other way round) made from EPS 035 DEO dh polystyrene foam is manufactured according to DIN EN 13163. The pipe connection guarantees the exact and optimum bending radius of the heat tube in the 16 mm dimension. The element can be used on solid and wooden beam floors and the screed can be moulded along with dry screed elements or wet screed according to DIN 18560.