> I found a 24 volt centrifugal blower
> unit without scroll at Burden's Surplus Center (Lincoln, NE) that I
> mounted to the lid with a spacer. It runs fine on 12, takes less
> current, is quieter than the fan and moves a lot more. I can't tell for
> sure, though since the areas I camped in last August and September were
> cool enough venting wasn't needed.
>
> http://www.surpluscenter.com/item.asp?
> UID=2008042416520336&item=16-1335&catname=electric<http://www.surpluscenter.com/item.asp?UID=2008042416520336&item=16-1335&catname=electric>
>
> They call this a motorized impeller.
>
Dr. J,
I looked at the impeller and saw that is sucks up the air in the center and
blows it out the sides. How do you know that that air will go out the vent
as opposed to back into the trailer?
Dave