Burner/hot air generator apparatus of the extender type

A hot air generator device comprising an injection device capable of producing a flow of combustible gas mixture at high velocity, said injection device including tubing comprising a convergent back section, a divergent front section, an injection nozzle mounted in the convergent section and connected to a source of pressurized gas, an opening for letting through air located in an annular area comprised between said nozzle and said back section, and a handle mounted on said tubing and a burner head, in which said flow is injected via a tubular extender with a maximum length exceeding 600 mm connecting said injection device to said head, wherein the extender comprises, at a centre of gravity of the hot air generator device, a suspension device for suspending the extender on a part of the body of the operator.