Attic Air Handler Replacement, Seen From the Duct Side

The before shot is an attic a lot of older homes still have: a supply plenum wrapped in foil-faced insulation, flex duct hanging off it, and a can of spray sealant sitting right there, which tells you somebody has been chasing air leaks by hand. The flex duct's outer jacket is printed R-4.2.

Then the cut to the after: new sheet metal where the old wrapped box used to be, a SwiftPro decal on the metal and an equipment checkup label stuck on so the next visit starts with the install record. The plenum is the box that sits on the air handler and hands air off to every duct in the house.