Abstract: Buildings or facilities containing energy consuming or energy generating devices may be optimized for efficient energy usage and distribution. Energy consumption or generation by a building or components may be controlled by a system comprising a building model for predicting behavior of the building given predicted future conditions and possible control inputs. An optimization component running an optimization algorithm in conjunction with the building model may evaluate the predicted building behavior in accordance with at least one criterion and determine a desired set of control inputs. Commercial building thermal mass may be harnessed to continuously and optimally integrate large commercial building HVAC operations with electric grid operations and markets in large metropolitan areas. The service may be deployed using scalable, automated, web-based technology.