Bigbruin.com posted a review on the Xclio Wind Tunnel Extreme Cooling PC Case

The portion of the Wind Tunnel's side panel that houses the two 25cm fans protrudes from the side of the case to compensate for the depth of the fans, so there won't be any issues with clearance between your components and the fans. There are also some ventilation holes on the top part of the side panel to let heat escape from the case.

Xclio Wind Tunnel Extreme Cooling PC Case Review