User's Manual

1.2.3 Air Vent
An internal fan creates airflow through the vents, preventing
your notebook from overheating.
When it gets hot, your notebook will switch on the fans, which
may make some noise. This is normal, and does not mean there
is a problem.
Never block, push objects into, or allow dust to gather in the air
vents. Doing so may damage your notebook or cause a fire.