Miele KM 6312 Operating And Installation Instructions page 56

Safety clearances
Safety clearance underneath the
cooktop
To ensure sufficient ventilation to the
cooktop, a certain gap must be left
between the underside of the cooktop
and any oven, interim shelf or drawer.
The minimum gap between the
underside of the cooktop and
– the top of an oven is 15 mm.
– the top of an interim shelf is 15 mm.
– the base of a drawer must be
75 mm.
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Interim shelf
It is not necessary to install an interim
shelf underneath the cooktop.
A gap of 10 mm is needed at the back
for laying the mains connection cable.
For better cooktop ventilation, however,
a gap of 20 mm is recommended.