Answer: by casing the entire flue after sweeping.
Attention: it is forbidden to connect a range hood to a chimney flue or to an active CMV. For obvious security reasons. That said, it is possible to use a chimney flue if it is no longer used and the flue is dedicated exclusively to the hood. In this case, complete tubing of the duct is essential. Why ? Because the temperature of the water vapor discharged from the hood may condense on the walls of the chimney and may, in the long term, cause sealing problems. Once the pipe is cased and properly connected, this solution is perfectly valid. Before connecting your hood, also think about having your chimney swept by a professional. Our practical kitchen decoration videos