Case fans, while having a size of 140 mm, have a very feeble and muffled blowing force, yet they are silent. The indoor area is quite well organized, and it looks great! Even though the size of the case is on the smaller side, it still has sufficient space inside of it. Both of the side walls have sound insulation installed in them. I couldn't be happier with this body! In the original case, I intend to install an additional fan.