| 摘要 |
A chimney flue with ventilator means, wherein at the upper part of a conventional chimney (1), a chamber (6) having an exhaust outlet above roof level (4) and intended to contain one or more ducts (7, 8) for the ventilation of air and/or effluent gases, as from a sewer, said chimney (1) and said chamber walls (6) forming on the exterior a single, unified chimneytop structure. |
