For fan: The fan is not exactly quiet! In my unit was installed a 4010L12S this has (no guarantee): 4.27CFM = 7,25m³ / h, 19dB, 12V, 4500U / min. This can be replaced with similar throughput occurred (with 2 pin Molex connector!) By a quieter 40 * 40 * 10 fan. I have the Mini Kaze 40mm (approximately 3,500 rev / min, approximately 7 m³ / h, about 14 db) installed, is noticeably quieter and can be easily infected.
Now have the "Noiseblocker BlackSilentFan XM1" installed in another housing, it has a 3-Pin connector, so it must be mounted or soldered with an adapter. The available here "fan cable adapter 3pin> 2pol" does not fit perfectly to the terminal also is the cable then very long and it gets tight in the housing. I could see no difference from the volume of the two fans, as the hard disk noise predominates.