The WARM-BOARD Light utilises a high compressive strength expanded polystyrene, with a highly efficient aluminium foil covering. This acts as a heat conducting surface to transfer the heat from the pipes to the finished floor above. When up to temperature, it delivers sufficient output to provide warm and even ambient temperatures within the living space. The best floor covering for the WARM‐BOARD Light, is a solid or engineered wood floor. Where coverings such as carpet are to be fitted, the system design must factor in the extra heat output that will be needed; a loss in output needs to be negated by increasing the flow temperature.