Abstract: A cylindrical gas premix burner comprises a cylindrical burner deck onto which the flames are stabilized when the burner is in use; a mixing chamber inside the cylindrical burner deck; an inlet device mounted perpendicularly to the axial direction of the cylindrical burner deck for the supply of premix gas into the mixing chamber; and an end cap closing off the mixing chamber at the side opposite to the side where the inlet device is provided. The inlet device comprises a perforated metal plate. The perforations in the perforated metal plate are provided for the supply of premix gas into the mixing chamber. The perforated metal plate is dome shaped; such that perforations in the perforated metal plate are located at different height levels from the base of the cylindrical burner deck.

Abstract: The burner (100) comprises a cylindrical porous substrate (110); and an end cap (130) at a first end of the cylindrical porous substrate (110). The cylindrical porous substrate (110) is provided for flow of a premix of combustible gas and air from the outside of the cylindrical porous substrate (110) through the pores of the cylindrical porous substrate (110) to an interior cavity (140), for the combustible gas to be combusted on the inner surface of the cylindrical porous substrate (110) thereby generating hot gas. The burner has an opening (182) at the second end of the cylindrical porous substrate (110) to exit the hot flue gas out of the interior cavity (140). The cylindrical porous substrate (110) has a higher permeability section (170), located at the opening (182) at the second end. The higher permeability section (170) has a lower resistance to gas flow than other sections of the cylindrical porous substrate (110).