Abstract: The invention pertains to a method for operating a surface stabilized fully premixed gas premix burner. The burner is adapted to modulate between a minimum load and a full load, the ratio of the full load over the minimum load being at least 4. The method comprises the step of supplying a premix of combustible gas and air to the burner at an air to combustible gas ratio, the combustible gas supplied to the burner comprises at least 20% by volume of hydrogen, In the method, the air to combustible gas ratio of the premix which is supplied to the burner when the burner is operated at minimum load is set by a mechanism to be in relative terms at least 20% higher than the air to combustible gas ratio of the premix which is supplied to the burner when the burner is operated at full load.

Abstract: A premix gas burner comprises a main body, a porous wall, a distribution chamber delimited by the main body and by the porous wall, and an entrance in the main body for introducing a premix of combustible gas and air into the distribution chamber. The main body comprises a cylindrical shape. The porous wall comprises a first porous wall segment and a second porous wall segment. The first porous wall segment and the second porous wall segment both comprise pores for the premix gas to flow from the distribution chamber through the pores, for combustion of the premix gas outside the distribution chamber. The first porous wall segment comprises or consists out of a shaped segment. The shaped segment is directed to the inside of the distribution chamber, such that when the burner is in use premix gas flows from the distribution chamber through the pores of the shaped segment to the inside of the shaped segment. The second porous wall segment comprises an annular porous wall segment.

Abstract: A premix gas burner comprises a main body, a porous wall, a distribution chamber delimited by the main body and by the porous wall, and an entrance in the main body for introducing a premix of combustible gas and air into the distribution chamber. The main body comprises a cylindrical shape. The porous wall comprises a first porous wall segment and a second porous wall segment. The first porous wall segment and the second porous wall segment both comprise pores for the premix gas to flow from the distribution chamber through the pores, for combustion of the premix gas outside the distribution chamber. The first porous wall segment comprises or consists out of a shaped segment. The shaped segment is directed to the inside of the distribution chamber, such that when the burner is in use premix gas flows from the distribution chamber through the pores of the shaped segment to the inside of the shaped segment. The second porous wall segment comprises an annular porous wall segment.

Abstract: A gas burner (10), preferably a premix burner, comprising a support (12) which has a central gas inlet port for supply of gas into a gas supply chamber. The gas supply chamber is enclosed by a perforated metal plate (22). The perforated metal plate is connected at the bottom to the support through a base section. The perforations in the perforated metal plate provide a burner deck (20). The burner deck has an overall porosity which is equal to or lower than 11%. The present invention also provides use of this burner, e.g. in heat exchangers.

Abstract: The present invention provides a gas burner, preferably a premix burner, comprising a support having a central gas inlet port for supply of gas into a gas supply chamber. The gas supply chamber is enclosed by a first metal burner membrane at its side and an end cap opposite to said gas inlet port. The end cap is connected to the top of the first burner membrane. The burner membrane is connected at the bottom to the support through its base section. The end cap is formed by a second burner membrane. The exterior surface of the first burner membrane and the end cap is made of perforated heat-resistant sheet metal plate.

Abstract: The present invention provides a gas burner, preferably a premix burner, comprising a support having a central gas inlet port for supply of gas into a gas supply chamber. The gas supply chamber is enclosed by a first metal burner membrane at its side and an end cap opposite to said gas inlet port. The end cap is connected to the top of the first burner membrane. The burner membrane is connected at the bottom to the support through its base section. The end cap is formed by a second burner membrane. The exterior surface of the first burner membrane and the end cap is made of perforated heat-resistant sheet metal plate.

Abstract: The present invention provides an alternative single burner heat exchanger combination for a gas-fired furnace for hot air generation to be used to heat spaces in residential and commercial settings. The fuel fired furnace is compiled of the known set-up of a plurality of spaced heat exchangers wherein each heat exchanger has an inlet port for receipt therein of combustion gases. The single burner is a premix burner providing an excellent combustion of the gas-air mixture. The burner is in fluid communication with each port of each heat exchanger through a dilution zone and a distributor. Preferably, these are all airtight connected to each other as can be seen in FIG. 2. The combustion gases produced by the premix burner are mixed with secondary air flows entering the system in this dilution zone, whereby diluted combustion gases are obtained. These diluted combustion gases will then enter the heat exchangers via the distributor. The combustion gases, having a temperature of about 1600° C.