<p>A radiant burner (1) comprises a body defining a premixing chamber (7) and a combustion chamber (8). The premixing chamber (7) is separated from the combustion chamber (8) by at least one radiant burner plate (2). The combustion chamber (8) is further delimited by a first radiant screen (3). The radiant burner further comprises a second radiant screen (4) in the combustion chamber. The radiant burner (1) having an open area ratio (AOR) ranging between 0 and 45%.</p>
