Fulgor Milano FPH 10014 TC BK Instructions Pour Installation, Utilisation Et Entretien page 16

For the dimensions of the hole, see drawing here below.
Top mounting of the built-in units
Flush mounting of the built-in units:
To assemble the hood use the accessories that are supplied and follow the instructions.
D
A = Built-in units
B = Transition piece
C
EN - 13