I have a Jayco Greyhawk 31SS, and it has one ducted 15K BTU A/C, it "works" but in 90 degree heat, in direct sunlight, I doubt i would see any temp below 78... Luckily, i don't go anywhere that hot. We don't like the hot, humid weather, so one A/C works for us. I believe in 2006 when this coach was built, that they were calling these super c's... I could be wrong. Also, i only have 2 small storage compartments on the passenger side, and a large one across the back from one side to the other.