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Federal Register / Vol. 86, No. 243 / Wednesday, December 22, 2021 / Proposed Rules
performance is evaluated on the same cycles that are used to determine energy and water consumption i.e., the heavy, medium, and light soil loads. ENERGY
STAR Cleaning Performance Test Method Section 5.1.B For non-soilsensing dishwashers, cleaning performance is evaluated on three additional cycles at the heavy, medium, and light soil loads that are run immediately after the clean-load cycle that is used to determine energy and water consumption. ENERGY STAR
Cleaning Performance Test Method Section 5.1.C Each test load item is quantitatively evaluated for cleanliness under prescribed lighting conditions referenced from ANSI/AHAM DW1
2010. ENERGY STAR Cleaning Performance Test Method Section 4.B
Additionally, Section 5.2 of the ENERGY STAR Test Method specifies the criteria to grade the load; it references Section 5.10 of ANSI/AHAM
DW12010, which specifies the following requirements: Each test load item receives a score based on the number and size of soil particles that remain on the item following the termination of a test cycle. Glassware items are additionally evaluated for the number and size of remaining spots, streaks, and rack contact marks. A score of 0 indicates a completely clean test load item, and a single test load item cannot exceed a cumulative score of 9.
The number of test items that receive each score is counted i.e., number of items in the test load that receive a score of 0, 1, 2, . . ., 9 and the weighted average of these counts is subtracted from 100 to produce a final cleaning index for the test cycle. A score of 100
indicates perfect cleaning performance.
Accordingly, DOE proposes to include the requirements specified in Sections 4B, 5.2, and 5.3, of the ENERGY STAR
Cleaning Performance Test Method, as follows:
Section 4B of the ENERGY STAR
Cleaning Performance Test Method establishes the lighting requirements for the evaluation room for scoring the test load, as specified in ANSI/AHAM DW
12010. These same lighting requirements are also specified in Section 5.10 of AHAM DW22020;
therefore, DOE proposes to reference Section 5.10 of AHAM DW22020 to specify the lighting requirements for the evaluation room.
Section 5.2 of the ENERGY STAR
Cleaning Performance Test Method establishes the scoring procedure to evaluate each dishware item in the test load after completion of the test cycle, as specified in ANSI/AHAM DW1
2010. The scoring method is also specified in Section 5.10.1 of AHAM

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DW22020; therefore, DOE proposes to reference the scoring requirements specified in AHAM DW22020.
Section 5.3 of the ENERGY STAR
Cleaning Performance Test Method specifies the equation for calculating a cleaning index for each test cycle, which is also specified in Section 5.12.3.2 of AHAM DW22020;
therefore, DOE proposes to reference the calculation of cleaning index for each test cycle from AHAM DW22020.
DOE notes that the calculation to determine per-cycle cleaning index is based on the individual score of each item such that dishware and flatware are scored based on soil particles, while glassware are scored based on soil particles as well as spots, streaks, and rack contact marks. DOE further notes that AHAM DW22020 provides two separate equations for calculating the total cleaning index for one test run.
The equation in Section 5.12.3.1 of AHAM DW22020 specifies a soil-only cleaning index, which is calculated using the scores of each test load item including glassware based only on soil particles. Section 5.12.3.2 of AHAM
DW22020 uses the same equation as that in the ENERGY STAR Cleaning Performance Test Method and ANSI/
AHAM DW12010, and defines the total cleaning index calculation using the scores of dishware and flatware cleaning performance based on soil particles and glassware based on soil particles as well as spots, streaks, and rack contact marks. DOE is proposing to reference Section 5.12.3.2 of AHAM
DW22020 to calculate the total cleaning index of a cycle because DOE
expects that consumers would evaluate the cleanliness of their load items at the completion of a cycle . DOE requests feedback on whether it should consider referencing Section 5.12.3.1 of AHAM
DW22020 instead, which would calculate the cleaning index based on soil particles only. If DOE were to calculate the cleaning index using soil particles only, it would reevaluate the per-cycle cleaning index threshold value discussed further in Section III.G.2 of this document to reflect this change. DOE requests stakeholder feedback on an appropriate threshold to consider.
DOE requests feedback on the proposed methodology to test, score, and calculate a cleaning index to validate the tested cycle and seeks comment if other methodologies should be considered for validating the cleaning performance of the tested cycle.
DOE requests feedback on whether it should consider referencing Section 5.12.3.1 of AHAM DW22020 to
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measure cleaning performance, which would calculate the cleaning index based on soil particles only. DOE notes that if it were to calculate cleaning index using soil particles only, it would reevaluate the per-cycle cleaning index threshold value to reflect this change.
2. Cleaning Index Threshold In response to the August 2019 RFI, Samsung commented that DOE should use the ENERGY STAR Most-Efficient cleaning index threshold when establishing the standard for dishwashers in the future standards rulemaking. Samsung, No. 9 at p. 3
In this NOPR, DOE proposes to provide direction in the test procedure as to what constitutes whether a cycle under test can completely wash a full load of normally soiled dishes, by establishing a minimum cleaning index threshold as a condition for each individual test cycle to be valid. The threshold is intended to represent a level of cleaning such that if the dishwasher did not meet this threshold after operating in the normal cycle, the consumer would be expected to operate the dishwasher using a more energy-intensive cycle than the normal cycle. Specifically, DOE proposes that if the normal cycle at a particular soil level i.e., heavy, medium, or light does not achieve the defined cleaning index threshold, that soil level i.e., heavy, medium, or light would need to be retested using the most energy-intensive cycle to be determined using the proposed methodology discussed in Section III.G.4 of this document that achieves the defined cleaning index threshold. The data from the most energy-intensive cycle would be used to represent that soil level in the downstream calculations.
To determine an appropriate threshold value, DOE aggregated confidential consumer cycle selection data provided by industry for this NOPR, and considered past consumer comments and test data collected in support of the October 2020 Final Rule.27
DOE understands general consumer satisfaction as a fundamental characteristic of a functioning market, and that consumers are largely satisfied with the performance of dishwashers currently on the market. However, based on Samsungs comments discussed in Section III.G of this document as well as qualitative comments that DOE received during the rulemaking that culminated in the October 2020 Final Rule, DOE
27 See Dishwasher NODA Test Data 52120, available at: www.regulations.gov/document/EERE2018-BT-STD-0005-3213.

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