Dick Blenz once entertained the idea of building a house in the
Volcano Room in Buckners Cave, near Bloomington, Indiana. Up there is
makes some sense. While the cave humidity is the usual very high, the
cave temperature is about 56 F, so that when the modest amount of
heating is applied, you end up with a reasonably indoor humidity.
In Texas, humidity would be a problem. You can't use passive cooling
without an increase in humidity (which around here is pretty high
anyway in the summer). If you actually used air from deep cave, you'd
be living in near-100% humidity because you wouldn't be heating up the
air much if any. If you used outside air without an air-conditioner,
it would be positively dripping when cooled by the surrounding earth.
Auto and home air-conditioners overcool the air to wring the water out
of it before they blow it into your space. That's why cars in Texas
always seem to be leaking fluid.
--Mixon
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