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Adapt the duct if necessary, to the thickness of the wall with suitable tools, in the best way as shown below:
Once adapted the length of the recessed duct (6) to the exact thickness of the wall, put the external wall-
mounting part (4e) on the external wall as shown in the picture below:
Insert centrally the wall-mounting part (4e) inside
the recessed duct (6).
Once it’s already centered in the duct, mark the fixing holes on the external wall using the external wall-mounting
part (4e) through a level measure tool to ensure a proper installation as shown in the picture below:
Make the holes and insert the expansion plug for the wall mounting.