[bigben2k]

I took the blower apart last night and this morning. Good news, it's reversible (the housing can be mounted on either side). In plain english, I can screw up on the rotation (CW or CCW) for the replacement motor, and make up for it.

The not-so-good news is that the blower wheel isn't balanced. There's been an apparent effort made to balance it (i.e. small disks drilled out on the perimeter) but not good enough; the wheel freely rotates to the same position. The outside hub appears to be perfectly centered, but the inside one is off.

I'll look at this issue again, when I have the replacement motor (no spare shaft to play with, right now).

Otherwise I may have found a (free) source (co-worker) for a plastic tube in 24" diameter, but the length is in question.

Now focusing on the temporary rig for the temperature controller test.