Coleman-Mach 8 Cub
The Mach 8 Cub is the smallest rooftop unit in the range: 9,200 BTU, 8.25 in tall, and light enough for a van roof. It runs comfortably on a 2,200 W inverter generator and fits the standard 14 x 14 in opening. Optional electric heat kit for cool mornings. Unit, kit and parts here.