Miele DGC 6300 Operating And Installation Instructions page 151

Appliance and building-in dimensions
Ventilation cut-outs
To ensure sufficient ventilation to the oven, a cut-out of 500 x 30 mm is required in
the interim shelf above the building-in recess a and in the top of the housing unit
b. The furniture housing unit must not have a back panel fitted behind the
building-in niche.
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