Some furnaces have really heavy duct work both coming and going.
Metal duct work can be very heavy. It's very important that it be supported well. Proper support usually involves metal strapping, aluminum tape, and a horizontal run which leads to the vertical trunk distribution throughout the upper levels of the house.
Often the horizontal duct can separate and sag. Even when it is lifted back up into place, and perhaps stuck back on with aluminum tape, it can sag some more.
IT'S ALWAYS GOOD TO SEE SOME PERMANENT DUCT SUPPORT.
This house has a supply duct that will never sag again.
Notice how level it is!
Notice how stable its support is!
Notice how the strongest structure known to man, the arch (in this case a circle) was selected for support!
Oh, what is that red and black thing?
It is a flashlight!
And it's not going anywhere!
Nor is the duct! The support is doing very well! Problem solved!
I only hope there's a spare flashlight available should there be a power outtage!
Be sure to include that flashlight in any addendum! It needs to convey!
My recommendation: sometimes things look odd, but might be working! However, if it is odd or includes materials that look like they might not stay, be sure the "fix" comes with the house!
Jay Markanich Real Estate Inspections, LLC
Based in Bristow, serving all of Northern Virginia.
Office (703) 330-6388 Cell (703) 585-7560