The trouble with the high idle is that it don't come on untill you get 90 lbs of air so what good is it? As a passenger bus they used it or A/C other than that I don't see any good use for it . Once I have 90 lbs of air the only othe good usse is to warm up the engine and I have a block heater for that. I suppose if I were dry camping there would be a difference but I am just getting it set up for the ability to dry camp. RV furnaces use to much juice so I am installing Esper or Eberspacher diesel fired heaters which draw very little current at 24 volts. I have 6 80 watt solar panels and am building a generator for DC charging the batteries. Jerry