Fans and there directions

[HighPies]

How can i find out which direction my case fans blowing? i know its a stupid questions but other people installed it and im 100% sure some of them are not taking in or blowing out.

my current case

http://www.cpusolutions.com/store/pc/catalog/370open_941_detail.jpg
http://p.gzhls.at/540085.jpg

i got 1 in the front which im sure is taking in
i got 1 in the back which im sure it blowing out hot air
i got 2 on top, i think 1 is taking in and the other is blowing out
i got 1 side panel one which i think is taking in.

Its all coolermaster fans with there little sticker on it, the one side has details the other the CM logo.

The reason i ask is because i want it like this, btw sorry if i posted this in the wrong place, idk where to ask about fans

http://www.coolermaster.com/upload/product_feature/Web-370.jpg.

 

[Rusting In Peace]

Air will travel in the direction the fins are pointing

 

[Snipergod87]

Yeah just hold something light infront or behind the fan (tissue or what not), you can also usually feel the air pressure by putting your hand in front of it. Just dont stick your finger in there it hurts...

 

[HighPies]

thnx for replies, i thought of using smoke rather, so lit a match and watched which way the flame and its smoke went, came to the conclusion that all the fans except the one top exhaust fan was blowing in the right direction so i'll switch it around.

thnx guys.