The house is designed as a giant three-dimensional sundial, set on a fixed angle in relationship to the sun's movements to provide shade during the summer months, keeping the inside temperature cool, and during Fall, Winter and Spring sunlight enters the large windows as the sun's position is lower in the sky, thus warming the living space.

An interior view of a room inside of the Heliodome, a bioclimatic solar house, is pictured in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France
An interior view of a room inside of the Heliodome, a bioclimatic solar house, is pictured in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France, August 4, 2011. Reuters
An interior view of a room inside of the Heliodome, a bioclimatic solar house, is pictured in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France
An interior view of a room inside of the Heliodome, a bioclimatic solar house, is pictured in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France, August 4, 2011. Reuters
French cabinet maker and designer Eric Wasser looks at his Heliodome, a bioclimatic solar house, in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France
French cabinet maker and designer Eric Wasser looks at his Heliodome, a bioclimatic solar house, in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France, August 4, 2011. Reuters
The Heliodome, a bioclimatic solar house is seen in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France
The Heliodome, a bioclimatic solar house is seen in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France, August 4, 2011. Reuters
Visitors look at the Heliodome, a bioclimatic solar house build in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France
Visitors look at the Heliodome, a bioclimatic solar house build in Cosswiller in the Alsacian countryside near Strasbourg, Eastern France, August 4, 2011. Reuters
Solar