What are the safety warnings regarding heat and airflow?

Do not place the device directly on your lap or obstruct the device air vents. Use the device only on a hard, flat surface and do not allow soft surfaces like pillows, rugs, or clothing to block airflow. The AC adapter should not contact skin or soft surfaces during operation. The device complies with user-accessible surface temperature limits defined by IEC 60950-1. (Page 3)