Pfizer La Jolla, one of the largest pharmaceutical companies in the world, has taken strong steps to reduce peak demand, including an innovative chiller optimization project, and numerous equipment modifications. These upgrades, along with participation in SDG&E's demand response program helped Pfizer to average a 20% load reduction during the summer of 2007, with their highest peak reduction being 1.3 megawatts. Combined results from these measures have cut carbon emissions by 4298 metric tons, reducing energy usage by 17% from 2006 levels. Pfizer has also saved energy by encouraging colleagues to close fume hoods when not in use. Together, Pfizer's efforts have saved them over $625,000 annually.