Miele DGC 6805 Operating And Installation Instructions page 164

Appliance and building-in dimensions
Cut-outs for venting the steam combi oven and for installing the water hoses
To accommodate the water hoses and to ensure that the steam combi oven has
adequate ventilation, the following cut-outs measuring 500 mm x 40 mm must be
made:
a In the top of the furniture unit (for ventilation)
b In the interim shelf above the building-in recess (for ventilation)
c In the base of the building-in recess (for the water hoses)
d In the floor of the furniture unit (for the water hoses)
Make sure there is no back wall behind the building-in recess.
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