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This walk-in cooler was designed by Dennis and David Winkelman.  This energy-efficient natural refrigerator is kept cool by the earth.  The humidity and temperature are controlled with adjustable ventilation and the steel substructure acts as a Faraday cage in screening out cosmic radiation. (Photo of steel substructure in front of main dome foundation).  Root Cellar building information is available through Eco Domes Conservation Campus.  Phone 1-800-944-3764 or 1-218-764-2321

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