Does anyone remember reading about the construction of the largest zero-energy office building in Golden, Colorado? Commissioned by the Department of Energy, this 222,000 square-foot research support facility is located on the National Renewable Energy Laboratory campus and is now complete!

This is the largest zero-energy office building in the United States, and it will hopefully serve as an example to other commercial developers. True to it's name, this building will create as much energy as it uses during the year. Estimates on energy efficiency peg it as consuming up to fifty percent less energy than buildings constructed to current commercial codes. How did they do it?