Hole 48 aligns with one end portion of hole 45, such that when the other end of hole 45 is placed over a hole in the disk drive housing, air will enter the drive housing through the enclosure hole, pass along hole 45 to hole 48 and enter into the drive along path 49, shown in FIG. 4C. Recirculating air can be optionally guided with a ramp or other mechanism, as previously mentioned, into the chamb