Airflow in drive case

All: I'm replacing the fans in a dual 8" drive case. The case has two distinct sections - the drive side and the power supply side - each with a fan. On the power supply side, air is being pulled through the case and out the back through a filter. On the drive side, the fan is the blowing in, with no filter. The cover does not have any ventilation holes. It appears that the fan on the power supply side is original but the other one was installed later (based on the wiring and the model of fan). Should the orientation of the fan on the drive side be changed? I would think that cool air (although unfiltered) should be pulled through the front of the drives and out the back. Thoughts? Rich Rich Cini Collector of classic computers Lead engineer, Altair32 Emulator Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ Web site: http://www.altair32.com/ /***************************************************/