Forum Discussion
MrMudstud
Aug 15, 2006Explorer
Parrotguy wrote:
Dash vs. roof air
Someone asked awhile back, and I can't find the thread, which was more efficient, all things considered, when traveling in hot weather--using the dash or the roof air(with generator).
Motor Home magazine studied the issue and concluded that you should run the dash air. It seems counter-intuitive because of the additional load on the engine, but that's what they found.
I run the dash air, and if I start to climb a very steep hill I flip it off while climbing to take the drag off the engine. It will still blow cool air for a while, then I put it back on at the top of the hill.
Countrybiker wrote:
Well, I tried a different tactic today. After reading several post on the Class A forum about gas mileage, I drove from Fort Smith, Arkansas to Amarillo, TX using my cruise control set on 60 MPH (2500 rpm), running the generator and the coach AC's instead of the dash AC. When I filled up in Amarillo, my mileage came out to be 6.4 mpg. Tomorrow I'm going back to the dash AC at 60 mph.
Well we are in Gallup, New Mexico tonight. I drove across New Mexico using the dash air and not running the generator at all. I drove up some good grades and didn't find much difference in my level of power with the dash air on. Gas mileage was 7 mpg.
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