AOpen DE67 Series User Manual page 8

12. Risk of overheating!
• Do not install DE67 in a closed space. Be sure the ventilation holes in the DE67 side for at least 1 to 2 inches or 2 to 5 cm
of space for ventilation. To ensure that other objects do not cover the ventilation holes on DE67
In right side and rear side keep space at least 5cm. Don't put operating device inside closed space.