if you have what's known as "Blast from the Center" a/c, not sure you have any options unless you get a different a/c.
all the a/c's of this type(vs. ducted a/c) are very loud and hard to manage temp wise.
that's a big reason i chose a trailer with ducted a/c.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package