RE:  ... a fan placed in the pass through to help keep the feets and
paws cooler.

http://tinyurl.com/8xvk6mv   (less likely to flip over)
(Wally World sells this brand)

Geo/ATL .
********
So, I'm OK with math but limited with electricity.  This thing uses an
A/C adapter (included) or 8 D-Cells (not included).  Does this mean it's
12 volt and could be directly wired into the van without an adapter?