DW and I put a unit on our Jayco after getting the okay from the dealer (who said they had the okay of the manufacturer). That was the start of a very horrible nightmare. That trailer holds the record for the least amount of time we've owned a trailer (2 months - our first trailer lasted us 21 years). Trailer had an electric roof which wouldn't lift after installing the air conditioner. Will never trust a dealer after that one, so make sure you have written warranties to what is covered and what is not.