Max temperature when we pushed it got up to 55'C (funny since it's the H55 lol)
I have a fan either side of the radiator and you can probably see on the pic I only have one place for a side fan and that's just below the graphics card, so even if I put one in it will fit fine.
I also have an intake fan in the bottom front, and you can see that little exhaust/extractor fan sitting on top of the graphics card shooting hot air out the back so not as much heat rises up to the CPU/H55.
The front to back flow of air seems to be enough, with more outtake than intake to try and create a 'vacuum' effect in side the case.
[Edited by Shibby, 10/14/2013 3:48:30 AM]