Hey guys, i just built a computer and im using the Corsair 400r for my case. It comes with 2 fans in the front and 1 in the back. Its got 2 more on the top, 2 on the side and 1 in the bottom. I was wondering if fans come in different types, like are some exaust and others intake? Also, id like to know where i should put the fans. Like should i put intake on top or exaust on the bottom? I dont want to just go buy a bunch of fans and put them in terrible spots. Thanks!