I take it you had a ruff-spection today—
Small Condo, easy peasy. 
Is that spiral dust or something?
That a heat duct or a dryer duct. We did not see the whole picture you know. 
Looking up into a rectangular Return Air Compartment 15" x 24", Dirty Flexible AC Duct. First pic hard to tell but the duct is disconnected and or deteriorated (9 to 10 o’clock area)
.
They need to change their filters. :mrgreen:
Yes indeed. The Filter was too small by the way, but the biggest problem was the leak in the duct. Needs new ducts.
Why??
Because they are old and FUBAR… I told them that…
Good.
Sounds like you ruined an honest realtors day, Mr. CMI…:twisted: