This house is the culmination of many years of solar and energy efficient design experience. The backup for the solar is solar. The walls are made of compressed earth blocks made on site. The vega roof has R-76 cellulose insulation and the walls have R-27 spray foam with stucco. The foundation is built with a continuous insulation barrier and has 270 tons of solar heated gravel inside the insulate envelope to keep the house warm. A heat recovery ventilator provides fresh air and concentrating solar thermal panels supply heat and hot water. The solar electric system will generate enough power to satisfy the needs of the house.