Pachamama Farmhouse is a home for a family of four on an organic farm north of Boulder, Colorado. A passive solar concrete house, it incorporates mass walls and floors, solar hot water, hot water radiant floors, daylighting, shading, energy-efficient lighting, natural ventilation, and natural, non-toxic materials. Notice the effect of simple overhangs in the renderings created at the winter and summer solsti.

Solar noon - summer solstice

Solar noon - winter solstice