OK, I just swapped out my fans for some slim puller fans but I just want to make sure they are turning in the correct direction. I see the blades going clockwise (view from the back of the fans). I believe this is the correct way but I just wanted to make sure.

 

The direction of the blade is not the real question. Is the airflow going the same direction as the previous fans. One fan could turn clockwise, while the other turns counter-clockwise, but the air could still be flowing the same direction.

 

The air needs to be PULLED through the radiator and looking at the blades will tell you the proper direction. If it doesnt, reverse the wires