The REV RB has a loft bed and it blocks the forward output from the ductless AC unit.
I bought a vent from Amazon and added it.
Remove the bottom panel of the AC (like cleaning the filter) position the vent where the cold air will hit it directly. Trace around it, and cut it out with a jig saw. Pop rivet or screw it to the bottom plate and now you can keep it closed or open it and point it in any direction.
D & W (8840WH) Spaceport Air Conditioner Ceiling Vent Price: $ 7.86
Tom D 2015 REV RB Orlando