Sorry for the long span... I wanted to let all know - there is a cool Passive House project going on in Athens County Ohio. Details, details, and more details. The blog at this site will show you all there is on the construction of a passive house. TWO recoupaerators going into this place, and earth tubes. 17" thick walls, 10" of insulation under the slab. Take a look! www.sustainablepath.us.