Code of Federal Regulations > Title 10 > Chapter II > Part 431 > Subpart D - Subpart D—Commercial Warm Air Furnaces

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

TEST PROCEDURES

§ 431.75 - Materials incorporated by reference.

§ 431.76 - Uniform test method for the measurement of energy efficiency of commercial warm air furnaces.

§ 431.71 - Purpose and scope.

§ 431.72 - Definitions concerning commercial warm air furnaces.

ENERGY CONSERVATION STANDARDS

§ 431.77 - Energy conservation standards and their effective dates.

Appendix Appendix A - Appendix A to Subpart D of Part 431—Uniform Test Method for Measurement of the Energy Efficiency of Commercial Warm Air Furnaces (Thermal Efficiency)

Appendix Appendix B - Appendix B to Subpart D of Part 431-Uniform Test Method for Measurement of the Energy Efficiency of Commercial Warm Air Furnaces (Thermal Efficiency Two)