Colosol's Energy Saving Earth-Sheltered House

In 1978, construction contractor Michael Wiggins built an earth-sheltered house in Dillon, Colorado that also incorporated passive-solar features to boost its energy efficiency.

062 Colosol home - diagram
The energy-efficiency of this home depends upon three major features: The heat-saving capabilities of earth-sheltering, the collection of solar warmth through the atrium and skylights, and the retention of heat in concrete, rock, and tile flooring.
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