The fan pulls air through the case and does not blow into the case.
*
This power supply has additional thermal considerations in the form of the air duct which can be clipped on the top of the power supply around the fan to direct the airflow toward the heat sink and processor.
** It has a 3-pin keyed fan connector which plugs into the motherboard and allows the computer software to control the fan which turns it on or off-overriding the power connector
