| 摘要 |
The heating body (4) consists of an impermeable external jacket (7), through which tubes (10) are arranged, which are passed through by the combustion fumes. According to the invention, the boiler has means for increasing the circulation of the fumes in the bottom part of the body, which double the fume tubes (10) in their lower part to increase their cross-section artificially. The invention is of interest to makers of heating equipment. <IMAGE>
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