- Defined in:
DEER and MASControl The Database for Energy Efficient Resources (DEER) contains information on selected energy-efficient technologies and measures. The DEER provides estimates of the energy-savings potential for these technologies in residential and nonresidential applications. To determine the energy-savings potential, a DOE-2-based system called MASControl was developed by consultants of the California Public Utility Commission. The DEER “Standards” in this library represent the input assumptions used inside of MASControl to represent CA buildings of different vintages.