---- george jannini <georgejoann@GMAIL.COM> wrote:
>    Insulation- you must be joking.  A nice hot propane burner right
> underneath the box ain't exactly a help, either.

Well, that propane burner is smaller than the pilot light on a typical home hot water heater.
>
>    Incidentally, my fridge has been running on AC for a couple of days, box
> empty, van closed up (mostly).  At the moment it's around 82 degF inside
> the bus and  39 degF inside.

Mine will typically hold that temperature, with frost on the cooling fins,  on either A.C. or propane when it is 95 F ambient, if the van is in the shade.
At 80 F ambient, it will be closer to 35 F in the refrigerator.  But it will not do that on D.C., more like 42 or 43 F, and no frost at 95 F ambient.  But then, on the highway, which is when it is on D.C., it is not in the shade.  mcneely
>
> Geo/ATL

--
David McNeely