This is a "40B" fan coil unit installed horizontally with outlet roughly 12"W x 24"H. About 12" of the outlet height is blanked off to connect to existing ductwork (using Thermopan, no less).
About 3" of the inlet width is also blanked off.
As a great friend used to say "I don't make this stuff up".
What kind of problems can be expected if this 1-1/2 year old installation is left as is?
PS: DIP switches are set for 1,200 CFM cooling airflow with a 2-1/2 ton heat pump.