| 摘要 |
A hearth has a fireplace and a heat exchanger (1) mounted therein. The heat exchanger (1) comprises an enclosed space for liquid which is provided with an inlet and an outlet. In order to achieve high efficiency, along with a simple design, the enclosed space for the liquid of the heat exchanger (1) is a metal conduit (8) which describes at least one set of turns (9, 10 or 11) surrounding one another. <IMAGE>
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