Thanks. AC is in top of the old oxygen compartment, behind the driver. Where the silver vent is. It is a Kool Kat by Dometic, 10K BTU AC & heat pump. Pulled it out of a Coleman popup trailer years ago, sitting on my garage floor since. The only things on my roof are a stick on Unisolar panel, vent for the fridge(I thought of going side vent, but top vent is MUCH more efficient) & a small black tank vent. I'm not planning to take my kayak & accompaning Yakima box this time to Alaska, but there's plenty of real estate up there without a giant AC stuck in the middle. The 2800 genset runs the AC & heat pump with power to spare.The unit has a rotary compressor & the Onan doesn't seem to be working hard at all.