---
kind: "section"
citation: "10 C.F.R. § 429.20"
title: "10"
number: "429.20"
heading: "Residential clothes washers."
url: "https://uscodex.org/cfr/10/429.20"
---

# §429.20. Residential clothes washers.

- (a) **Sampling plan for selection of units for testing.**
  - (1) The requirements of [§ 429.11](/cfr/10/429.11.md) are applicable to residential clothes washers; and
  - (2) For each basic model of residential clothes washers, a sample of sufficient size shall be randomly selected and tested to ensure that—
    - (i) Any represented value of the integrated water factor, the estimated annual operating cost, the energy or water consumption, or other measure of energy or water consumption of a basic model for which consumers would favor lower values shall be greater than or equal to the higher of:
      - (A) **The mean of the sample, where—** Or,
      - (B) The upper 97 1/2 percent confidence limit (UCL) of the true mean divided by 1.05, where:
    - (ii) Any represented value of the integrated modified energy factor, energy efficiency ratio, water efficiency ratio, or other measure of energy or water consumption of a basic model for which consumers would favor higher values shall be less than or equal to the lower of:
      - (A) **The mean of the sample, where—** Or,
      - (B) The lower 97 1/2 percent confidence limit (LCL) of the true mean divided by 0.95, where:
  - (3) The clothes container capacity of a basic model reported in accordance with [paragraph (b)(2)](#b-2) of this section shall be the mean of the measured clothes container capacity, C, of all tested units of the basic model.
  - (4) The remaining moisture content (RMC) of a basic model reported in accordance with [paragraph (b)(2)](#b-2) of this section shall be the mean of the final RMC value measured for all tested units of the basic model.
- (b) **Certification reports.**
  - (1) The requirements of [§ 429.12](/cfr/10/429.12.md) are applicable to residential clothes washers; and
  - (2) Pursuant to [§ 429.12(b)(13)](/cfr/10/429.12.md?p=b-13), a certification report shall contain the following public product-specific information:
    - (i) **For residential clothes washers tested in accordance with appendix J1—** The modified energy factor (MEF) in cubic feet per kilowatt hour per cycle (cu ft/kWh/cycle), the capacity in cubic feet (cu ft), the corrected remaining moisture content (RMC) expressed as a percentage, and, for standard-size residential clothes washers, a water factor (WF) in gallons per cycle per cubic foot (gal/cycle/cu ft).
    - (ii) **For residential clothes washers tested in accordance with appendix J2—** The integrated modified energy factor (IMEF) in cu ft/kWh/cycle, the integrated water factor (IWF) in gal/cycle/cu ft, the capacity in cu ft, the corrected remaining moisture content (RMC) expressed as a percentage, and the type of loading (top-loading or front-loading).
  - (3) Pursuant to [§ 429.12(b)(13)](/cfr/10/429.12.md?p=b-13), a certification report must include the following additional product-specific information: A list of all cycle selections comprising the complete energy test cycle for each basic model.
- (c) **Reported values.** Values reported pursuant to this subsection must be rounded as follows: MEF and IMEF to the nearest 0.01 cu ft/kWh/cycle; WF and IWF to the nearest 0.1 gal/cycle/cu ft; RMC to the nearest 0.1 percentage point; and clothes container capacity to the nearest 0.1 cu ft.

## Notes

### Amendments

[76 FR 12451, Mar. 7, 2011; 76 FR 24767, May 2, 2011, as amended at 77 FR 13936, Mar. 7, 2012; 77 FR 32379, May 31, 2012; 80 FR 46760, Aug. 5, 2015; 87 FR 33379, June 1, 2022; 89 FR 82061, Oct. 9, 2024; 90 FR 43379, Sept. 9, 2025]

### Authority

Authority: 42 U.S.C. 6291-6317; 28 U.S.C. 2461 note.

### Source

Source: 76 FR 12451, Mar. 7, 2011, unless otherwise noted.

### Amendments

[76 FR 12451, Mar. 7, 2011; 76 FR 24767, May 2, 2011, as amended at 77 FR 13936, Mar. 7, 2012; 77 FR 32379, May 31, 2012; 80 FR 46760, Aug. 5, 2015; 87 FR 33379, June 1, 2022; 89 FR 82061, Oct. 9, 2024; 90 FR 43379, Sept. 9, 2025]