Watched the vids and took the cover off again (last time I just did the filter and didn't check, I figured a brand new TT would be fine still right?) NOT.
Intake side had two large (1"x4") gaps on either side of the rear side wall, plus many other small seams that weren't sealed well. Tape wasn't stuck well and was peeling everywhere.
Outlet side was even worse. There are only TWO outlets which are foam boxed channels they made out of what looks like 1/8" foam board, but both were sagging from pressure of insulation on top/bottom of them, and were pinched shut probably blocking about 20% of airflow. I'm going to actually screw them up to the plywood to squish the insulation, creating a larger "funnel" type inlet area. ALL AROUND each inlet was open, to the insulation. Some areas I had to lightly push the tape to inspect it, but basically it was just blowing into the ceiling area.
I'm going to try to widen those inlet ducts and seal the heck out of every tiny little gap on both sides of the unit. I may need some additional plastic sheet or board for the outlet areas, as foil tape on insulation doesn't sound like it'll work so well.
I'll let you know soon, but either way that's gotta help a lot. :D
