The design uses the building's concrete thermal mass to mitigate extreme temperature swings and integrate radiant heating and cooling systems, with a solar chimney to provide 100% fresh air by moving exhaust air to the bottom of the chimney to combine with the atria's preconditioned air and preheat incoming cold air to within room temperature, and employing geothermal technology via a closed loop system of 280 boreholes, six inches in diameter (variously reported as five inches in diameter), 400 feet deep, located between elements of the foundation. The geo-thermal boreholes are filled with tubing carrying glycol, which extracts heat from the building in warmer months while warming the thermal mass of the floor slabs radiantly in colder months. Heat pumps and exchangers maximize the system's efficiency, providing conditioned water that is then circulated in tubes in the exposed ceiling slabs, providing 100% of the mechanical temperature conditioning.