This report responds to a September 29, 2004, request from Senator Byron L. Dorgan requesting a quantitative analysis of the impacts of various energy efficiency policies. The policies include tax incentives, appliance efficiency standards, building code revisions, increases in mileage requirements for new vehicles based on revised testing procedures, voluntary energy reduction programs, and energy efficiency performance standards for suppliers of electricity and natural gas. The report includes estimates of the policy impacts through 2025 compared to the reference case of EIA's Annual Energy Outlook 2005.

Contents	(complete Report)
Executive Summary
1. Background
Policies Represented Using Assumed Impacts Provided to EIA in the Study Request
Policies Represented Explicitly by End Use
Methodology and Uncertainties
2. Results
Multi-Policy Case Aggregate Results
Impacts of Individual Policies
Contacts
Appendix A. Analysis Request Letter
Appendix B. Forecast Comparison Tables
Special Topics