In an underfloor heating system, the basic devices used are the same as in conventional systems (e.g. burner, heat pump). The difference lies in the fact that the final recipients of the hot water are not the radiators but the floor itself, which acts as a radiator. Once the floor has been insulated from below, a system of pipes is laid out which carry the hot water over its entire surface.
The initial cost is slightly higher than common types of heating, however, the payback is relatively fast as the operating costs of underfloor heating are much lower than those of radiators.