If you are building have you considered this????
www.monolithicdome.com It is basically a stressed concrete, tornado proof residence.
All the ductwork is usually hidden in the walls and the thermal efficiency is so high that many of these things are cooled with RV AC units.
Not exactly the best building if you are in the middle of a standard box subdivision though.
Food for thought.
btw, is your sig the Vogon?
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the chewtoy for the dog of Life
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