Dell OptiPlex DCCY Setup And Quick Reference Manual page 27

• Leave a 10.2-cm (4-in) minimum clearance on all sides of the computer
that have air vents to permit the airflow required for proper ventilation.
• If your enclosure has doors, the doors need to be of a type that allows at
least a 30-percent airflow through the enclosure at the front and at the
back.
NOTICE:
Do not install your computer in an enclosure that does not allow airflow.
Restricting the airflow impacts your computer's performance, possibly causing it to
overheat.
• If your computer is installed in a corner on a desk or under a desk, leave at
least 5.1-cm (2-in) clearance from the back of the computer to the wall to
permit the airflow required for proper ventilation.
Setting Up Your Computer
27