This is the left side of the case showing the window and left side video card / HDD cooling intake area.
There is also a Thermaltake i-Cage takes up 3x 5.25" bays. This allows you to mount 3x 3.5" HDDs as well as a 120mm fan to cool the HDDs and/or provide air intake.
There is a center mounted 120mm fan mounted internally that draws air in from both sides of the case through a hole in the side panel.
The HDD area is cooled using a 120mm fan mounted between the 2 HDD cages that pulls cold air in through the mesh on both side panels, and down through a vent on the bottom of the case under the HDD area.
This keeps the HDD area cool and DOES NOT allow warm air from the HDDs to re-enter the case to be used to cool the PCI area of the motherboard.