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Federal Register / Vol. 86, No. 167 / Wednesday, September 1, 2021 / Proposed Rules
container capacity: energy efficiency ratio, active-mode energy efficiency ratio, and water efficiency ratio;
11 Update the number of annual clothes washer cycles from 295 to 234;
and 12 Update the number of hours assigned to low-power mode to be based
on the clothes washers measured cycle time rather than an assumed fixed value.
Finally, in this NOPR, DOE is proposing to remove Appendix J1 and to update the relevant sections of 10 CFR
parts 429, 430 and 431 in accordance with the edits discussed previously, and
to modify the product-specific enforcement provisions regarding the determination of RMC.
DOEs proposed actions are summarized in Table II.1 compared to the current test procedures as well as the reason for the proposed change.

TABLE II.1SUMMARY OF CHANGES IN PROPOSED TEST PROCEDURES RELATIVE TO CURRENT TEST PROCEDURES
Current DOE test procedure Specifies a water meter resolution of no larger than 0.1 gallons.
Does not specify how to install clothes washers with a single inlet.
Specifies a hot water supply temperature of 130
135 F.
Defines the Extra-Hot Wash threshold as 135 F
Specifies a target water supply temperature at the high end of the water supply temperature range.
Specifically allows the use of temperature indicating labels for measuring wash water temperature.
Specifies different pre-conditioning requirements for water-heating and non-water-heating clothes washers.
Specifies the test load sizes for clothes container capacities up to 6.0 ft3.
Requires 3 tested load sizes on clothes washers with automatic water fill control systems.
Defines load sizes for each 0.1 ft3 increment in clothes container capacity.
Defines water fill levels to use with each tested load sizes on clothes washers with manual water fill control systems.
Requires testing up to 3 Warm Wash temperature selections.
Specifies that the RMC is to be measured on separate cycles from the energy test cycle.
Provides product-specific enforcement provisions to address anomalous RMC results that are not representative of a basic models performance.

Specifies that the starting weight of the test cloth may be up to 104 percent of bone-dry.
Does not specify a measure of cycle time

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Specifies discarding data from a wash cycle that provides a visual or audio indicator to alert the user that an out-of-balance condition has been detected, or that terminates prematurely if an out-ofbalance condition is detected.
Does not explicitly state how to test semi-automatic clothes washers.
Does not explicitly address the required configuration for network-connected functionality.

Defines metrics that are dependent on capacity IMEF, MEF, IWF.
Estimates the number of annual use cycles for clothes washers as 295, based on the 2005 Residential Energy Consumption Survey RECS
data.

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Proposed test procedure
Attribution
Requires a water meter with a resolution no larger than 0.01 gallons if the hot water use is less than 0.1 gallons, in Appendices J and J2.
Specifies installing clothes washers with a single inlet to the cold water inlet, in Appendix J.
Specifies a hot water supply temperature of 120
125 F, in Appendix J.
Specifies an Extra-Hot Wash threshold of 140 F, in Appendix J.
Removes the target water temperature specification, in Appendices J and J2.
Adds specification for using a submersible temperature logger to measure wash water temperature, in Appendices J and J2.
Requires the same pre-conditioning requirements for all clothes washers, in Appendix J.

Improve representativeness of test results.

Specifies the test load sizes for clothes container capacities up to 8.0 ft3, in Appendices J and J2.
Reduces the number of load sizes to test to 2, and specifies new load sizes, in Appendix J.
Redefines load sizes for each increment in clothes container capacity, consistent with reduction from 3 to 2 load sizes, in Appendix J.
Changes the water fill levels consistent with the updated load sizes, in Appendix J.
Requires testing a maximum of 2 Warm Wash temperature selections, in Appendix J.
Specifies that the RMC is to be measured on all energy test cycles, in Appendix J.
Provides additional product-specific enforcement provisions to accommodate differences in RMC
values that may result from DOE using a different test cloth lot than was used by the manufacturer for testing and certifying the basic model, for Appendices J and J2.
Requires that the test cloth be bone-dry at the start of every test cycle, in Appendix J.
Specifies provisions for measuring cycle time, in Appendix J.
Specifies discarding the test data if during a wash cycle the clothes washer signals the user by means of a visual or audio alert that an out-ofbalance condition has been detected or terminates prematurely, in Appendices J and J2.
Provides explicit test provisions for testing semiautomatic clothes washers, in Appendix J.
Specifies that clothes washers with connected functionality shall be tested with the network-connected functions disabled if such settings can be disabled by the end-user, and the products user manual provides instructions on how to do so, in Appendices J and J2.
Specifies new metrics that are dependent on the weighted-average load size, in Appendix J.
Updates the estimate to 234 cycles per year, based on the latest available 2015 RECS data, in Appendix J.

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Provide further direction for unaddressed feature.
Improve representativeness of test results.
Improve representativeness of test results.
Reduce test burden.
Reduce test burden.

Improve reproducibility of test results.
Response to waiver.
Reduce test burden.
Maintain representativeness.

Maintain representativeness.

Reduce test burden.
Reduce test burden, improve representativeness of test results.
Accommodate potential source of variation in enforcement testing.

Improve reproducibility of test results.
Improve representativeness of test results.
Response to test laboratory question.

Provide further direction for unaddressed feature.
Improve reproducibility of test results.

Improve representativeness of test results.
Update with more recent consumer usage data.

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