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re: duct basics
14 sep 2003
don ocean   wrote:
 
>> >>...don't go above 400 feet per minute, to keep fan power low...

>ummmm? just exactly how are you getting 400 fpm...

a fan, as mentioned above. but it might happen naturally. with an 8' rise,
400 = 486sqrt(8dt/(70+460)) makes dt 45 f, with 115 f air coming out of
a vent at the top of an 8' tall closet, in a 70 f room. 

>you would have to be using the pali mountain system of oahu for that much
>thermosyphoning. or the santana vortex of calif.

would you care to explain this article of faith? :-)

nick




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