My computer Fans?

[zestou]

For my case fans, how can i tell if the fan is taking out air out of my case, and putting cold are into my case?

 

[MasterDell]

How are your fans setup? If you arent using side panel fans and the front fans are in taking and the rear fans are exhausting, you should be fine.

 

[geofelt]

Dangle a tissue in front and see which way it moves.

 

[volcanoscout]

Geofelt's answer is probably the simplest way of checking. You can also look at the hub in the center of the fan - usually one side has a sticker with brand and model info. Airflow is from the blank side towards the side with print and/or graphics. If you're looking at the fan from the outside of the case (as opposed to having the case open and looking at the fan from the inside) and you can see the sticker, it's an exhaust fan and is pulling warm air from inside the case. If you don't see a sticker, it's an intake fan and is pulling cool air from outside the case.