I'm sure this has been beat to death but, is it more efficient to run the dash air or to run the generator and one roof air.This is on a gas Ford v-10 and a 7000w Onan. Thanks for any input.
Whether your ScangaugeD sees the fuel usage on the genny or not depends on where fuel flow is measured. If it's where it leaves the tank, then yes. If it's measured at the input to the lift pump, no.
My gen runs on propane and the dash air doesn't do a great job of cooling the pup if he's on the couch. So far I haven't needed to run the house A/C, but it's there.
In the last such discussion, I think I saw a number of 0.5 MPG to run the generator.