In addition, the cabinet has holes for 2x120mm fans. However, If you want to have the cabinet in the living room, you should definitely use very quiet fan. I have solved the by, I have found me a PSU with a 4-pin Molex connector, how to use it for USB-SATA adapter. At the 4-pin Molex then comes an adapter for 2x 3-Pin Molex (fan connection). After that comes the fact each a potentiometer and then the fan. So I was able to let the fans nice and slow turning and simultaneously connect the fan normal (by the power supply) to the power outlet. The fan should ever plan to, because the Cabinet has in principle by its small size when closed no ventilation.
I'm not sure if this is normal in 19 "cabinets, but the rails for mounting devices are very easy to bend. One should not screw too heavy case purely so. I have therefore found me a false floor, which I with a wood pieces have back supported. Otherwise my QNAP Turbo NAS would have probably made the closet unusable.