A heating apparatus, in particular for recreational vehicles like campers or caravans, comprises a heating unit and at least one heat exchanging unit coupled to the heating unit. The heating unit comprises at least one burner and at least one combustion air fan unit. The combustion air fan unit is configured to supply the burner with combustion air. The burneris configured to burn fuel gas or liquid further supplied to the burnertogether with the combustion air received from the combustion air fan unitto get hot exhaust gasses. The heat exchanging unitis configured to receive the exhaust gasses from the burnerand to transfer heat from the exhaust gasses to a fluid to be heated, provided within the heat exchanging unit. The burnercomprises at least two nozzles configured to supply fuel gas or liquid to a combustion area in which the fuel gas or liquid is to be burned with the combustion air. Each of the nozzles is coupled to its own fuel gas or liquid valve to control the fuel gas or liquid supply for the nozzles independently of each other. Furthermore, the present invention refers to a recreational vehicle with such a heating apparatusand methods for starting and controlling the above heating apparatus.

A plate body 11 of a combustion plate 10 is provided with no-burner port portion 13 where no burner ports 12 exist, and a burner port group 14 made up of a plurality of burner ports 12 is arranged in each region 15 of the plate body 11 surrounded by the no-burner port portion 13. A port diameter D of the burner ports 12 differs between the burner port groups 14, but the respective burner port groups 14 are made up of the burner ports 12 of the same port diameter D, and are arranged so that the greater the port diameter D of the burner ports 12 making up each burner port group 14, the greater the interval T between the burner ports 12 in the burner port group 14 becomes.

A water heater including a burner body (1) and a fan case (2) accommodated in casing (100), wherein the burner body (1) has a main burner body unit having a flat burner (3) on a lower surface side thereof and an introducing unit (11) protruding upward from the upper surface of the main burner body unit (12), wherein a discharging portion (53) of the ignition electrode (50) is disposed within a projection plane (180) when wall sections (13) (14) (15) (16) of the introducing unit (11) is projected downwardly.

The present invention relates very generally to the monitoring of a flame treatment device and in particular to a substrate treatment system having a flame treatment device and first and second substrate monitoring units.

A water heater including a burner body (1) and a fan case (2) accommodated in casing (100), wherein the burner body (1) has a main burner body unit having a flat burner (3) on a lower surface side thereof and an introducing unit (11) protruding upward from the upper surface of the main burner body unit (12), wherein a discharging portion (53) of the ignition electrode (50) is disposed within a projection plane (180) when wall sections (13) (14) (15) (16) of the introducing unit (11) is projected downwardly.

The invention concerns a surface-combustion gas burner comprising a combustion grate consisting of a metal sheet pierced with a series of slots. This burner is remarkable in that said metal sheet comprises a series of deflectors made in one piece with said metal sheet and protruding on the outer face of same, each deflector extending longitudinally and laterally above the entire surface of a slot, and in that each deflector comprises a guide portion for guiding the gas flow and a junction portion joining to the metal sheet, said guide portion being spaced from the metal sheet in such a way as to provide therewith at least one lateral gas ejection port, said deflectors being disposed in pairs in such a way that the lateral gas ejection ports of same face each other.