Only the rear A/C is ducted. When you close the "quick cool" vents on the A/C unit the cold air is pushed through the duct work. The bedroom A/C only cools the bedroom.
The bedroom a/c is ducted. I can feel it blowing in the living area through the ducts when only the bedroom a/c is on.
Last night I checked mine to see the pressure drop accros the coil for proper cooling. I noticed I had leaks on both of them with the supply air mixing into the return. I was able to duct tape these areas off and noticed much better performance
