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Non-vented crawlspaces and radon

I am about to begin new construction in Northern Idaho (dry) near a lake (wet). This area is very radon-rich. I have read that non-vented, "conditioned" crawlspaces are a great idea in moist environments as they inhibit moisture and mold, but am wondering how doing this would impact steps to make the house radon-resistent (gravel foudation covered with plastic, and pipe/fan installed in the ground to vent radon out through the roof.) The non-vented crawlspace article was in the Feb. 18, 2008 issue of Fine Home Building, entire issue devoted to energy-smart homes. (Very good issue). Thanks for any advice you can offer.

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