This new, three-story, 115,000 square foot interdisciplinary laboratory building is LEED registered, and a model of sustainable design for laboratories.  It will provide 25 wet and dry laboratories, 16 science-project prep rooms, four classrooms, group study areas, observatory, vivarium, greenhouse, and 58 faculty and department offices.  Our mechanical design features such energy-efficient measures as low-velocity ductwork, VAV fume hoods and heat recovery in the laboratories, pre-cooling of outside air using a cooling tower that also provides process water cooling for lab equipment (which reduces the chiller plant load by 35%), condensing boilers and mixed-mode HVAC for the atrium.  Other features include dust-collection systems, a high-pressure air system for “air tracks” in the physics labs, and a greenhouse using radiant heating and evaporative cooling.  Our energy analysis resulted in a design that exceeds the California energy code by 15.5 percent.  A significant portion of the load from the 100% outdoor air systems is handled by indirect evaporative cooling systems. The building envelope and program configuration was optimized to maximize glazing or north elevations, and utilize skating devices on the elevations. The building is designed to achieve LEED Silver.