Ducted A/C Unit - Bypass Ductwork for Better Cooling??

Why? You like a ho bedroom while the living area is cool?
Both our units are front and then one over the kitchen area with connecting ductwork.
Sometimes only one unit, the rear or main one, is needed as the cooled air is spread throughout the coach.
We can close the bedroom door and be cool and no noise at tall, fro the ducts in the bedroom.