Welcome to the Jayco Owner's forums.
Mine is a 2010 and if I get time to do so I will measure the door this afternoon when I am out and about. I replaced my uncomfortable sofa with dual recliners that attach to each other and with no center armrest (similar to many or all loveseats). The dual recliners back sections are removable and in fact the back was not connected during the shipping. Had the backs not been off (or not removable) I feel confident I would not have been able to get it through the door. Point being, I would check and make sure the loveseat you are considering has a removable back otherwise I doubt it will fit through the door. (perhaps they all have removable backs...). ~CA
BTW, I see you posted this in the wrong forum, there is a class c forum and a super c forum, perhaps a moderator can move this for you if you send them a message.