Its a 1994 unit. Yeah I have thought about the roof top, but I am not sure my generator can handle a roof top air unit. I have a window unit that I know it works with. Or might look at the portable air unit. But leaning towards taking the rear window out of the camper and trying to put the unit I already have in. Its small enough I shouldn't have to cut anything and if I do it right I could always put the window back.