National Geographic Society sets an example with green headquarters

The National Geographic Society is saving 8 to 11% on energy costs, amounting to USD 300 000 per year, following energy efficiency and water conservation upgrades to its headquarters in Washington DC.
The Society’s 100-year-old building complex was the first in the USA to achieve Leadership in Energy and Environmental Design® for Existing Buildings (LEED-EB) certification. Johnson Controls and the Society worked together to implement a broad range of improvements to reduce energy usage, including: upgrading HVAC and lighting systems; replacing chillers, boilers, and air-handling systems with more efficient equipment; installing digital building control systems.