The U.S. Department of Energy (DOE) encourages greater energy efficiency in buildings through the development and implementation of model energy codes and standards. In support of this goal, DOE 1) evaluates published editions of ANSI/ASHRAE/IES Standard 90.1: Energy Standard for Buildings Except Low-Rise Residential buildings, and the International Energy Conservation Code to help states and local jurisdictions better understand the impacts of updating their commercial and residential building energy codes and standards, and 2) assess the savings associated with updated these codes and standards.
DOE relies on an established methodology for each model code, and conducts both national and custom state-level analyses. In addition, a State Savings Calculator allows for further customization based on various economic perspectives and other state-level assumptions.
The BC3 data, as referenced in the methodology, was originally available as a web-based database, but has now been archived and made available as a spreadsheet. This spreadsheet represents the complete contents of the BC3 database.