Dash Air

[Ralph7]

           Who makes the gas or diesel powered AC units for big trucks. They mount the engine n compressor on the frame of the truck and condenser on the back of the cab.

[TomC]

ThermoKing makes the Tripack that uses a 2 cylinder Diesel (2 cylinders are rough running) to power the A/C compressor that uses the existing truck evaporators to cool the cab.
Powertech uses a conventional generator to power a Dometic electric under bed A/C and heat.
There are numerous APU (Auxiliary Power Unit) made for trucks. Most have about a 14,000btu capacity for the A/C-which is the same as a roof top A/C.
Because of most APU's using a 2 cylinder and not much sound insulation, they are noisier then you would want to use in a campsite. In a noisy truck stop, not a problem. Good Luck, TomC