| 摘要 |
Removable tunnel for converting an open-hearth fireplace into a closed-hearth fireplace comprising, inside the hearth, added-on boxes 4 fixed on either side in a sealed manner so that the air admitted through the cutouts 3 is heated before being diffused in the hearth above the opening 6 made on the diffuser 5 connecting the boxes 4 in the front part. <IMAGE>
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