Projected baseline energy use is calculated by an energy model during the design phase. All ECMs are removed from the model, and this energy data becomes the baseline to determine energy savings when compared to actual energy use. According to Option D of

Projected baseline energy use is calculated by an energy model during the design phase. All ECMs are removed from the model, and this energy data becomes the baseline to determine energy savings when compared to actual energy use. According to Option D of IPMVP III, the model must be calibrated so that it is ready to be used after one year of data collection.