The new CENCE, the first modern Energy Control Centre in Central America, is the ICE headquarters, one of the most representative institutions of Costa Rica. With a built area over 10,000 m2 and an urbanized one exceeding 15,000 m2, it houses its offices and central technical services, and it manages both the energy that is generated and the one that goes through the country.The rationale behind the project had five main points: high level of comfort and habitability conditions for employees; high energy efficiency; maximum physical and functional security (Tier IV); flexibility for both the extension of the building and the internal distribution changes and an opti-mum water management system. The building is formed by adding equal size hexagonally shaped modules. With the sole exception of the module that harbours the Control Room, each module, whatever its location, has a central courtyard which guarantees optimum ventilation and illumination conditions.