they pulled the drain plug out so condensate would run straight down over controls.
the house is about 1200 sq ft. the return drop wasnt even secured to furnace.the lady bought the house last year and paid a home inspector $300 bucks to take a look at the house and he never said anything about furnace and ac.
That venting is quite mesmerizing, a sheet metal sculpture of a tornado. Such a masterpiece should be signed and sent to the Louvre so all of mankind can benefit from beholding its striking beauty. Sadly, many such finds are lost by the unenlightened common man.
I bet this is in a basement. I bet what the installer was going for was to save the homeowner money by using humid basement air drawn in at the top of the exchanger to humidificate the air going upstairs. And the heated air coming out saves the expense of ductwork in the basement.