Abstract: A combustion membrane (14, 14?) for a gas burner (2) forms a multilayer panel (22) including a gas-permeable diffuser layer (24) of a porous or fibrous solid material other than metal sheet, the diffuser layer (24) forming a combustion surface (25) facing an outer side (17), a support layer (26) formed by a metal sheet (32), arranged on an inner side (23) with respect to the diffuser layer (24), opposite to the combustion surface (25), and connected to the diffuser layer. The metal sheet has a pattern (27) of passage openings (28), a local deviating layer (29), bordering the support layer (26). Diverter flaps (30) bent transversely out of the support layer (26) and delimited by cutting or tearing edges (42) of the support layer metal sheet (32), form guide surfaces (31) oblique to a direction (40) orthogonal to an extension plane (41) of the multilayer panel (22).

Abstract: A burner comprises a tubular diffuser wall and an inlet passage for a gas mixture into the diffuser wall, as well as a first diaphragm with one or more first through openings and a second diaphragm with one or more second through openings of different shape and distribution from those of the first through openings, said first and second diaphragms being substantially concentric and arranged in sequence in the inlet passage.

Abstract: A burner (1) comprises a front wall (2) with an exchanger opening (4) for the passage of a heat exchanger (14), a rear wall (5) with a fume discharge opening (7), a tubular side wall (8), a tubular diffuser wall (9) within the side wall (8), an annular distribution chamber (12) formed between the side wall (8), a combustion chamber (13) formed within the diffuser wall (9) and suitable for the insertion of the heat exchanger (14), wherein the rear wall (5) comprises a cooling interspace in flow communication with the gas supply line of the burner.

Abstract: A burner comprises a tubular diffuser wall and an inlet passage a flow of a mixture of gas within the diffuser wall, as well as a first diaphragm arranged in the inlet passage, said diaphragm forming a plurality of through openings and a plurality of guide surfaces delimiting the through openings on a radially outer side thereof so that, when introducing the mixture, said guide surfaces and said through openings direct the mixture towards the inside of the burner and in a radial direction towards the longitudinal axis.

Abstract: A gas burner for a heater comprises a planar metal frame portion with an elongated opening defined by two longitudinal edges and by two transversal end edges, as well as a combustion membrane in the form of a tridimensional shell, connected to the frame portion along the longitudinal and transversal edges, wherein the combustion membrane has a diffuser layer, which forms an outer combustion surface made of a perforated metal sheet, and which extends between the two longitudinal edges with a single curvature out of the plane of the frame portion, and two closure portions made of metal sheet extending from the transversal edges out of the plane of the frame portion and which close end areas between the diffuser layer and the transversal edges of the frame portion.

Abstract: A burner (1) comprises a front wall (2) with an exchanger opening (4) for the passage of a heat exchanger (14), a rear wall (5) with a fume discharge opening (7), a tubular side wall (8), a tubular diffuser wall (9) within the side wall (8), an annular distribution chamber (12) formed between the side wall (8), a combustion chamber (13) formed within the diffuser wall (9) and suitable for the insertion of the heat exchanger (14), wherein the rear wall (5) comprises a cooling interspace in flow communication with the gas supply line of the burner.

Abstract: A burner comprises a tubular diffuser wall and an inlet passage a flow of a mixture of gas within the diffuser wall, as well as a first diaphragm arranged in the inlet passage, said diaphragm forming a plurality of through openings and a plurality of guide surfaces delimiting the through openings on a radially outer side thereof so that, when introducing the mixture, said guide surfaces and said through openings direct the mixture towards the inside of the burner and in a radial direction towards the longitudinal axis.

Abstract: A burner comprises a tubular diffuser wall and an inlet passage for a gas mixture into the diffuser wall, as well as a first diaphragm with one or more first through openings and a second diaphragm with one or more second through openings of different shape and distribution from those of the first through openings, said first and second diaphragms being substantially concentric and arranged in sequence in the inlet passage.