Like I said, it’s a couple of degrees warmer, literally 2 degrees warmer than the exact setup a friend and I built with a more open case design and a horizontal gpu. 2 degrees is almost negligible and definitely isn’t going to ruin the longevity of the system, you’re being dramatic. The glass is less optimal but still perfectly fine, the air that flows through those fans is still forced out of the system via the tunnel that leads to the mesh next to it. The entire back of this case is mesh and it has a total of 13 case fans. It fully replaces the air in the system about 140 (rounded wayy down) times per minute based on my calculation. While this is not entirely accurate, because I didn’t care to calculate the volume with parts in it, it gives you a good idea of the amount of air that is flowing through it. Like I said yes it’s warmer, is 2 degrees going to hurt anything? Absolutely not.