Bosch NIT3065 Installation Instructions Manual page 8

Cabinet requirements The distance from the top of the cooktop to the bottom of the cabinets above it
must be A -- 30" (762 mm) minimum. This distance can be reduced to
A -- 24" (610 mm) when the bottom of the wood or metal cabinet is protected by not
less than 1/4" (6.35 mm) flame retardant millboard, covered by no. 28 steel sheet
0.015" (0.4 mm) thick stainless steel, 0.024" (0.6 mm) aluminum, or 0.020" (0.5 mm)
thick copper, at a minimum. Verify that the cabinets above the cooktop are a
maximum of B--13" (330 mm) deep.
i Building side wall
Cooking surface