Which direction should i install my fans Corshair h100i

In general, if you have the radiator at fan blowing into the case, the CPU will be cooler, but at the expensive heating up the inside of your case and other components. If you have it at an exhaust, the CPU won't be as cool, but everything else in the case is cooler.
 


But how od i blow the out the case if the fans are on the underside SHould i blow the air through the radiator towards the top of the case then?
 


Yeah exactly like this: http://cdn.overclock.net/5/5f/900x900px-LL-5fa497ab_u73ngWw.jpeg

I have also seen people just mount the rad on the ouside of the case on top, if you dont have room like this: http://cdn.overclock.net/a/a1/600x450px-LL-a1302817_375472_921783850884_27304619_39970453_155386184_n.jpeg

Their should be arrows on the fan that show the direction of the air flow if your not sure.