These very low cost and fast constructions were made during an educational activity and have a capacity of 2-3 people. The foundation is drywall, the masonry out of earthbags, and the roof is a wooden geodesic dome that was invested with used clothes and rugs dipped in lime, insulated with old clothes and the interior final surface was made out of old bags of coffee. They are being heated by a fireplace and a rocket mass heater.