The invention relates to a radiant gas burner device comprising a first cylindrical chamber (1) and a first injector (2) for feeding the first chamber with a combustible gas mixture, the first chamber (1) comprising an external peripheral heating surface (10).The device of the invention further comprises a second cylindrical and hollow second chamber, and a second injector (4) for feeding the second chamber with a combustible gas mixture, the second chamber being positioned inside the first chamber (1), separated from the first chamber by a sealed wall, and having an internal heating surface (30), and the first and second injectors (2, 4) being designed for separately feeding the first and second chambers, independently of each other.