direction of case fan and stability

[nxh]

i have a antec case and i am not sure which direction the case fans should be facing for optimal circulation.
i figure the back fan blows air in and the front fan should blow air out. Is this correct or does it even matter which direction air flows.?

Also what do i use to hold up the case fan in the back. Is there a special adapter?
Currently using tape but does not look professional and stable.

 

[dbcrossfire]

i have a 1030b and it came with these nifty purple things you mount the fan into and then pop the purple things in the the back of the case.

 

[Jhhnn]

In general, the rear fan exhausts while the front pulls air into the enclosure. Kinda like this:

AMD

Fans must fit the enclosure, when they do, the mounting holes are obvious and fans can be attached with screws and nuts or special fan screws, available from a variety of online vendors like 2cooltek or millisec, maybe even from a local electronics shop or radio shack.