An energy-neutral home according to the Passive home principles hardly needs any energy to heat the house. Electricity is generated by a wind turbine on the roof. Integrated in the roof line are 14 m2 heatpipes. These provide warm tapwater. Air from outside is first heated up by a Sole ground heat exchanger before entering the house. Next to all these high tech features, the house also uses low tech solutions. A summer night ventilation system works by opening a shutter on the ground and on the top floors. And to increase thermic mass, adobe walls are featured on the sleeping floors. This adobe is enhanced with Phase Changing Materials that absorb heat during the day and set it free again during the night.