fan-radiator set up

is it better to push or to pull ir through a radiator?

Mine does both but most of the time I use the pushing fan because it brings in fresh air.

i'm guessing you have an inline pump. so is the question is whether to go to the cpu or the radiator first? with my resevoir setup, i'm currently going to the radiator first, then to the cpu. i used to go cpu to radiator, but either way, i don't think it much matters.

oops, my bad...didn't notice the ir (air) comment. i actually use 2 120mm fans, one 2 push, the other 2 pull. if u only have one it would depend upon the placement. if the fan is doubling as an exhaust and the radiator is inside, use it to pull. it's the easiest and most efficient way for that type of set up.