Prefabricated radiant panel, suitable for environments subject to reaction to FIRE REGULATIONS CLASS A1. It consists of a glass-fibre reinforced plasterboard sheet with 15 mm low calorific value paper covering on both sides, a 50 mm thick layer of rock wool insulation and snail layout with PE-XC pipes sized 8×1 mm with oxygen-barrier up to 5 cm pipe spacing. It guarantees an excellent acoustic insulation.