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.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC