Smeg PGF64 Manual page 12

Instructions for the installer
Obstructions: location of gas and electric connectors (measured in mm).
IMPORTANT: if the appliance is mounted on a unit, make sure that a separating
shelf is installed, as shown in the figure.
However, if the appliance is on an oven installed under the hob, there is no need
to install a separating shelf.
If installed on top of an oven, the latter must be equipped with a cooling fan.
32