Lenovo ThinkPad T520 (English) User Guide - Page 31
Fan louvers rear, To avoid impeding airflow, do not place any obstacle in front of the fan.
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4 Fan louvers (rear) The internal fan and louvers enable air to circulate in the computer and cool the central processor. Note: To avoid impeding airflow, do not place any obstacle in front of the fan. Chapter 1. Product Overview 13
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4
Fan louvers (rear)
The internal fan and louvers enable air to circulate in the computer and cool the central processor.
Note:
To avoid impeding airflow, do not place any obstacle in front of the fan.
Chapter 1
.
Product Overview
13