Abstract: A reactor for the complete combustion of gases and fuels without emissions of polluting agents, with increased efficiency of combustion, and decreased condensation on the exchange surfaces, providing greater longevity of the firebox. Turbulence of the combustion gases is induced by a coupling ring, placed between a cone and a deflector, which cause the gases to take a trajectory parallel to the generator cover of the chamber, and causes the gases to inpinge against the heat exchange surfaces, thereafter causing a more even caloric heat distribution.