Smeg Oven General Instructions Manual page 22

Instructions for the installer
8.4 Multiple installations
When installing multiple units, position two or more appliances with a distance of
50 mm between them, making sure they are at least 50 mm away from any back
wall and 30 mm away from any side walls.
Two or more appliances may not be stacked on top of each other.
Warning: the appliance support base must not be over 1.60 m above the floor.
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