I can just imagine what was smoked before this one was put in...
Note the lovely 7" bypass pipe that's bypassing UNFILTERED air into the blower on the opposite side of the EAC. This furnace is a 5 ton drive, it requires a bottom return or two side returns. This is clearly not correct. To top it off, the ducts are full of drywall dust and it's being drawn directly into the motor vents.
The trunk (not pictured) is not hung straight, and the panning is all cardboard Thermopan that's sagging and brittle from being wet at some point.
Think twice before you buy a new home from a "cookie cutter" builder.