Installing New AC Vent in Ceiling

[4ever16]

I have a 2007 Allegro Open Roads 35 TSA with both of my a/c's connected to a main ceiling mounted duct system. My returns work the same way. QUESTION I would like to install a main a/c supply that would dump the cold air directly into the rig. My neighbor has a 2006 Open Road that works thru a duct system but also has a 12 x 12 supply vent he can slide open and dump the air straight in...can I do this ??? has anyone made this addition to there's?
Thanks for your help..
Butch

[dougrainer]

The Duct Dump is mainly for units that have the 14 x 14 cut out inside on the ceiling. Your model is all round ducts. Your model is mounted from the roof top down. So, there is no OEM/Aftermarket kit that will do what you want. Doug (Tiffin dealer service tech)

[zigzagrv]

Don't know what brand A/C's you have, but my Dometic has a sliding vent on the inside cover that allows me to dump or go thru the ducts.