CFR > Title 10 - Energy > CHAPTER II—DEPARTMENT OF ENERGY > SUBCHAPTER D—ENERGY CONSERVATION (parts 400 to 491) > PART 431—ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT > SUBPART R—Walk-in Coolers and Walk-in Freezers (§431.301 to §431.306) > 431.304—Uniform test method for the measurement of energy consumption of walk-in coolers and walk-in freezers.

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 refrigerated bottled or canned beverage vending machines.
(b) Testing and Calculations. (1) [Reserved]
(2) The R value shall be the 1/K factor multiplied by the thickness of the panel.
(3) The K factor shall be based on ASTM C518 (incorporated by reference; see § 431.303 ).
(4) For calculating the R value for freezers, the K factor of the foam at 20 degrees Fahrenheit (average foam temperature) shall be used.
(5) For calculating the R value for coolers, the K factor of the foam at 55 degrees Fahrenheit (average foam temperature) shall be used.