Iria

"It seems that over the years fans have become larger and it looks like they have finally become the same size as the case dimensions themselves. The first thing that jumps out at you when looking at the AeroCool AeroRacer Pro case is the 40cm or 15.7 inch box fan strapped to the side. At 400mm in size the fan is nearly as tall as the 410mm chassis, which makes it look like a box fan strapped to the side of the computer. Back in the early days of LAN gaming people used to improve cooling by using a household box fan, so it looks like that cooling trick finally went mainstream and a 120V electrical connection isn't needed..."
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Source: Legit Reviews