A heating devices for complete intermixing of gaseous fuel and air to allow complete combustion of the gas and air mixture in a mushroom shaped flame. The device includes an element for supplying an axial flow of air and a swirling device in fluid communication with the air supply to turbulently swirl and radially inward direct the air entering from the air supply. The heating device also includes an nozzle element located within a mixing chamber formed by the swirling device. The nozzle forms a plurality of bores to emit the fuel as generally radially outward directed streams into the swirling stream of air exiting from the swirling device to intermixes the fuel and air. A disk connected to the nozzle restrains the gas streams within the mixing chamber to facilitate the mixing of the fuel and air. The intermixed fuel and air is then ignited by an ignition device. A combustion chamber is disposed about an upper first end of the swirling device to contain the generated flame.
