I have Renegade 112, 212 and 410 combos. They all have fans. The 410 seems quietest, followed by the 212 and 112 in that order.
I believe the Renegade 112 combo has the loudest fan of all the Renegades because the fan is mounted at a 45 degree angle to vertical. These "computer fans" were designed to be mounted vertically or horizontally but seem to make more noise when mounted at an angle. The bearing surfaces seem to howl a bit more when mounted in this fashion. This is a known situation in the computer world where fans dominate, check out an excerpt from a computer fan review:
"Unfortunately for the Marathon, it happened to be loudest at the angle that we typically measure from — 45° off the exhaust side — so our noise measurements and recordings are worst case, not typical. At this angle, the noise was a constant droning hum. Instead of becoming louder when the fan speed increased, the noise became rougher and more intrusive. In addition to the drone, a pure tone — most likely the sound of the blade assembly resonating — could be heard. At full speed, this resonance dominated the noise signature, but turning the fan down by even one volt dropped the tone drastically."
Steve