| 摘要 |
Perfect installation of a chimney return in all cases. The invention consists in increasing the size of the chimney return by one tile undulation which makes it possible to have an opening which is 16 cm larger than the chimney block. This 16 cm clearance ensures that the chimney return is installed perfectly. The jacket caps the chimney return and provides the waterproofing for the latter, as it is the same size as the chimney block. The system comprises a chimney return and a screened jacket. This invention is intended for the building industry and enables the chimney return to be installed rapidly and perfectly.
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