What is the fuel consumption on A Carrier Auxiliary Power Unit?

It varies based upon load. I have found it to be 0.25 Gal on the low side to 0.35 Gallons under heavy load. Its a bloody pig. The unit has to run at all times for any heating or cooling. This is where the Tripac has this unit beat hands down is on the fuel consumption. In the winter the Tripac uses an Espar bunk heater which uses only a fraction of the fuel that an APU engine does. In the summer when the APU cools the cab to the desired temperature, the Tripac shuts off where as the Carrier only turns off the electric A/C compressor but the engine continues to run.