Section 431.304 - Uniform test method for the measurement of energy consumption of walk-in coolers and walk-in freezers(a)Scope. This section provides test procedures for measuring, pursuant to EPCA, the energy consumption of walk-in coolers and walk-in freezers.(b)Testing and calculations. Determine the energy efficiency and/or energy consumption of the specified walk-in cooler and walk-in freezer components by conducting the appropriate test procedure as follows: (1)Display panels. Determine the energy use of walk-in cooler and walk-in freezer display panels by conducting the test procedure set forth in appendix A to this subpart.(2)Display doors and non-display doors. Determine the energy use of walk-in cooler and walk-in freezer display doors and non-display doors by conducting the test procedure set forth in appendix A to this subpart.(3)Non-display panels and non-display doors. Determine the R-value of insulation of walk-in cooler and walk-in freezer non-display panels and non-display doors by conducting the test procedure set forth in appendix B to this subpart.(4)Refrigeration systems. Determine the AWEF and net capacity of walk-in cooler and walk-in freezer refrigeration systems by conducting the test procedures set forth in appendix C or C1 to this subpart, as applicable. Refer to the notes at the beginning of those appendices to determine the applicable appendix to use for testing.(i)For unit coolers: follow the general testing provisions in sections 3.1 and 3.2 , and the equipment-specific provisions in section 3.3 of appendix C or sections 4.5 through 4.8 of appendix C1.(ii)For dedicated condensing units: follow the general testing provisions in sections 3.1 and 3.2 , and the product-specific provisions in section 3.4 of appendix C or sections 4.5 through 4.8 of appendix C1.(iii)For single-packaged dedicated systems: follow the general testing provisions in sections 3.1 and 3.2 , and the product-specific provisions in section 3.3 of appendix C or sections 4.5 through 4.8 of appendix C1.74 FR 12074, Mar. 23, 2009, as amended at 76 FR 21605, Apr. 15, 2011; 76 FR 33631, June 9, 2011; 76 FR 65365, Oct. 21, 2011; 79 FR 27412, May 13, 2014; 79 FR 32123, June 3, 2014; 81 FR 95802, Dec. 28, 2016 81 FR 95802, 1/27/2017; 88 FR 28839, 6/5/2023