--- Michael Elliott <camping.elliott@GMAIL.COM> wrote:

> neil wrote:
> > Good point about "stack effect". Hot air does
> rise....
> >
> Yeah but. The lower vent is about floor-level in the
> van. Punch a hole
> through the bottom of the van and that adds, what?
> two inches?
>
> Anyway, height is added /above/ the heat source in a
> flue to increase
> draw, adding depth below the heat source doesn't do
> anything useful. Add
> a 12-foot chimney if you want to see some flow up
> the flue.

Actually the idea was to punch a hole through floor to
access *possibly* cooler air under van. This air would
be directed across fins with fan/duct and exhausted
outside of van. Of course thinking about it more later
tonight, I realized the earth/pavement would retain
heat for part of the evening. Temp of air under van
might just be warmer than the rest of surrounding air....

Neil Nicholson.
1981 air cooled Westfalia.
Cheap-o web site:

http://www.members.shaw.ca/tubanick/welcomewesty.html

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