permaculture

["Robert Waldrop" <rmwj@soonernet.com>]

"They say" the ancient Romans and Muslims used such ground tube
technology, and there is supposedly a building in DC that used to have
such a system.

there is a solar AC yahoo group and its archives have a rather
extensive discussion of this.  As I recall, to cool a 1400 sq ft
house, you would need about 400 ft of 6" underground tubes.  problems
associated with such systems include heating up the ground, so you
lose the cooling effect (primarily a problem in places with limited
space so they loop the tubes, not a good idea as it turns out).

Robert Waldrop, okc
-----Original Message-----
From: Sharon Gordon <gordonse@one.net>
>I am trying to find a site I saw once before which describes the use
of
>underground cooling tubes which brought cool air into the house
without the
>use of fans.  It seems to me the drawings were of nonwestern
architecture
>and may have had rooms around a courtyard as well.
>
>Does this sound familiar to anyone, or do you know of other sites
that
>describe this well and have examples?
>
>Sharon
>gordonse@one.net