Site Feedback

Title 10

Displaying title 10, up to date as of 7/15/2026. Title 10 was last amended 7/13/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 10EnergyPart / Section
Chapter IIDepartment of Energy200 – 699
Subchapter DEnergy Conservation400 – 499
Part 431Energy Efficiency Program for Certain Commercial and Industrial Equipment431.1 – 431.485
Subpart GCommercial Water Heaters, Hot Water Supply Boilers and Unfired Hot Water Storage Tanks431.101 – 431.110
§ 431.101Purpose and scope.
§ 431.102Definitions concerning commercial water heaters, hot water supply boilers, unfired hot water storage tanks, and commercial heat pump water heaters.
Test Procedures431.105 – 431.106
§ 431.105Materials incorporated by reference.
§ 431.106Uniform test method for the measurement of energy efficiency of commercial water heating equipment.
Energy Conservation Standards431.110
§ 431.110Energy conservation standards and their effective dates.
Appendix A to Subpart G of Part 431
Uniform Test Method for the Measurement of Thermal Efficiency and Standby Loss of Gas-Fired and Oil-Fired Storage Water Heaters and Storage-Type Instantaneous Water Heaters
Appendix B to Subpart G of Part 431
Uniform Test Method for the Measurement of Standby Loss of Electric Storage Water Heaters and Storage-Type Instantaneous Water Heaters
Appendix C to Subpart G of Part 431
Uniform Test Method for the Measurement of Thermal Efficiency and Standby Loss of Gas-Fired and Oil-Fired Instantaneous Water Heaters and Hot Water Supply Boilers (Other Than Storage-Type Instantaneous Water Heaters)
Appendix D to Subpart G of Part 431
Uniform Test Method for the Measurement of Standby Loss of Electric Instantaneous Water Heaters (Other Than Storage-Type Instantaneous Water Heaters)
Appendix E to Subpart G of Part 431
Uniform Test Method for the Measurement of Energy Efficiency of Commercial Heat Pump Water Heaters