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To install the product, the wall thickness cannot be less than 250mm.
Once obtained the hole, put the recessed duct (6) into the wall.
Make sure that the length of the recessed duct (6) is equal to the thickness of the wall.
The duct must end with the internal and external surfaces of the wall.
The quote “M” cannot be less than 250mm. In this case the wall is not appropriate to install the
product.
Adapt the duct if necessary, to the thickness of the wall with suitable tools, in the best way as
shown below:
