For those of you using window AC units hung off the side and pointing
in the passenger window, or otherwise.  I am assuming people mostly
use the 5-6000 BTU units for that.  My question is how well does that
size unit cool the van?  If it's hot outside, like 90+ degrees, and
you start out cooling a van that is already hot inside, like 110
degrees because it's been sitting in the sun...  How does the AC unit
do to cool it down?  Does it take hours or minutes before it starts
getting comfortable?  Pop top up or down?  Please give me some feedback.

Thanks,
Edward