Yes, the new units will drop right in providing you are replacing them with the same manufacturer and similar model. If you switch brands/models then all bets are off.
Make sure you seal the connection really well between the duct opening and the new A/C with foil tape once it is in place. Also seal any holes that you can see in the duct work itself.
Dr4Film ----- Richard
2002 Monaco Windsor PBT 40Ft. (R HOME) - 30Ft. 2006 Pace Trailer (R JUNK). Trailer Has 06 VUE (R TOWD) 04 Victory Alen Ness Edition (R RYDE). Full-Timer for 14 Yr's BUT now a Part-Timer. Cummins ISC-350 With Banks Power Pack and Upgraded PRXB PacBrake.
Winter Home in Flagler Beach FL - Now Staying in Dansville NY for the Summer.