6 or 7 year town home complex, all 2 story with zoning.
Maybe this has something to do with the drain issue?
The reason it was so far out of level became frighteningly clear!
I'm glad I didn't set my tool bag down on top of the air handler when I walked up to it.
The poor cooling and high utility bills were due to the arm on the bypass damper being on the supply air side of the damper, and taped in place holding the bypass fully open all of the time.
Also, it is a 12" bypass on a 3 ton system, which is grossly over sized, even if it was set up to work correctly.
A couple of years ago I reinstalled the air handler that had actually fallen down onto the attic floor at one of his neighbors town home. It was installed pretty much the same way.