--- 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 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com |
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