Welcome to the Massachusetts electronic Technical Reference Manual (eTRM). The eTRM is an electronic database that allows regulators, government agencies, stakeholders, and the public to access reports that provide methods, formulas, and default assumptions for estimating energy, peak demand, and other resource impacts from energy efficiency measures. The eTRM documents how the energy efficiency Program Administrators consistently, reliably, and transparently calculate savings resulting from the installation of prescriptive energy efficiency measures. For more information on the eTRM, update process, measure characterization structure, impact factors and formulas, and glossary, please see the eTRM Overview.
To access the eTRM, please use the following link: