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 - house exterior
Exterior of the Colosol earth-sheltered house. The structure's garage and air-lock entryway are located above ground. The living area is set partially below ground.
PHOTO: MOTHER EARTH NEWS STAFF