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Your question: Heating / Fireplace / Air Conditioning I have a closed insert with bushel and casing 180. I installed in my hood 2 heat recovery grilles no hot air comes out. Inside my hood I can see glass wool and a bushel? What should I do to recover heat?

In principle, the duct that passes through your hood is insulated (by the glass wool you see, but also, in your case, by the double protection of a bushel and a casing). It is therefore normal that there is no temperature rise in the hood. To benefit from it, it is necessary to install a heat recuperator of conduit, like that (system CHEMIN'AIR) that we presented from AUTOGYRE.

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