What are your thoughts on this

I’m telling you this is standard on mobile homes. I inspect a lot of them and this is what you see.

What “fundamental” does it violate? The air comes in through door or wall vents, goes through filters that are directly against the A-coil, and is distributed to the rooms. I don’t see what’s so terribly wrong about it.

Joe,

The fundamentals of S/A and R/A, velocity and volume and resistance (static pressure) of air movement/flow.
I guess I’m slow or maybe I don’t understand what I’m looking at in this “one” picture. Either way, this apparent single S/A and R/A design is fundamentally wrong in my eyes and experiences. How do you attain even temperature throughout the bedrooms, bathroom(s), and other areas. How could possibly avoid hot/cold spots throughout. I could go on and on.
I’m just trying to understand what I’m looking at. Help me out with additional pictures and a better explanation of the design concepts. Maybe Charley or others can help too.

Thanks Joe that is what I will run with