Help with NZXT fan orientation

[Linnaeus]

I have 2x140mm NZXT fans and an H440. I plan to put them in top exhaust orientation. Problem is I don't know which way the fan blows outwards or intakes. Do I put this side facing upwards or downwards? Or do I put this side up or down?

 

[mickypheonix]

Hi Linnaeus
The best way to tell which direction a fan blows is to look at the curve of the blades
here is an example

if you are still unsure plug a fan into a molex from your psu or a 3 or 4 pin fan header on your motherboard and power up the fan and feel which way it is blowing before you mount them into your case