| 摘要 |
The funnel has an exhaust gas shaft (2) for carrying away the exhaust gases and a combustion air shaft (3) for delivering combustion air to the fireplace. To achieve heat exchange between the exhaust gas and the combustion air the exhaust shaft is mounted concentrically inside the combustion air shaft, and at least one combustion air opening (7) is adjacent to the exhaust opening above the roof. The combustion air shaft has at least one additional opening (10,12) within the building, via which exhaust air can enter from the building into the air path formed by the combustion air and exhaust shafts. An Independent claim is also included for kit for a heat exchanger funnel
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