The DOE-2 computer program has been used extensively in recent years for modeling energy conservation measures (ECMs). Due to the complex and timeconsuming data gathering process demanded by the program, use of the model is most appropriate for complicated buildings. Methods that can streamline the input and output effort are possible. Retrofit measures simulated on a DOE-2 computer model, as opposed to manual methods, are simply executed and produce more reliable results. In addition, a completed computer model can be a powerful resource for an energy manager if used periodically to understand and control building energy use.
