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My chimney smokes a lot. What should I do?

The causes can be multiple:

an excessive opening of the focus with respect to the size of the duct inlet; an insufficient air supply volume (for example, following the installation of insulating windows without improved ventilation); the configuration of the chimney (straight with too advanced fireplace or lack of a drain); the configuration of the duct: it must extend at least 40 cm above the ridge of the roof; a partial obstruction; the operation of a VMC that disrupts the air circuit.

In any case, be very careful: the risk of asphyxiation by carbon monoxide related to a faulty conduit is important. If there is the slightest doubt, call in a heating engineer or a professional fire extinguisher.

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