BTPO1 wrote:
As others have said, I fire up the Generator and start the air. My dash air works, but it is useless IMO. If I keep the DW cool everyone is a lot happier. I don't think the extra fuel useage is as important as the comfort that the AC provides. JMO
Not only that, but you might find that the your mileage suffers considerably with the dash air, as well. That's quite a load on the engine and robs HP with these systems being the size of a small house unit. I mean how else to cool a car even, with so much inefficiency's to combat and without over-killing the size of it.