Speed Oven Heat Deflection
What is the difference between a microwave and a speed oven?
Thermal Clearances
Speed ovens (convection + microwave) generate significantly more exterior heat. The cabinet carcass must be lined with heat-deflection tape, and 1/4" "reveal" gaps are required around the face to allow for cooling.
Heat-deflection tape and 1/4" cooling reveals required for convection-microwave hybrids.