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Publication of GEU20071330YpublicationCriticalpatent/GEU20071330Y/en
A heater, which contains a case 1, a primary furnace 2, pipes 4 and 5 for input of air and output of the exhausted gas, is provided with heat-exchanger 6, connected with the pipe for output of the exhausted gas by means of which high-temperature products of burning are fed thereto from the heater. The heat-exchanger has pipe 8 for output of the exhausted gases into atmosphere.