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Federal Register / Vol. 86, No. 167 / Wednesday, September 1, 2021 / Proposed Rules
increments, and none are available in increments of 125 F to 135 F. AHAM, No. 5 at pp. 67 According to AHAM, testers must estimate when 135 F is reached on labels that are currently available. Thus, AHAM suggests that DOE consider permitting the use of submersible temperature loggers. Id.
As discussed by UL and AHAM, DOE
is aware that none of the temperature indicator labels available on the market provide an indicator at 135 F, the current Extra-Hot Wash water temperature threshold. Because of this, temperature indicator labels can be used to confirm that the water temperature reached 135 F only if the water temperature exceeds 140 F. The temperature indicator labels are unable to identify an Extra-Hot Wash/Cold Rinse cycle if the temperature of the cycle is greater than 135 F but less than 140 F. DOE recognizes the potential benefit of other methods of measurement to supplement or replace the temperature indicator labels.
DOE investigated submersible temperature loggers as suggested by AHAM. DOE found submersible temperature loggers available for less than $175 and available with a resolution of 0.5 C 0.9 F or better and an accuracy of 0.5 C 0.9 F for water temperatures between 10 C 14 F and +65 C 149 F.24 In testing with such temperature loggers, DOE found them small enough in size to be able to embed within the test load during testing.
However, DOE testing indicated a 5 to 10-minute time lag in measuring dynamically changing temperatures, which is likely due to the thermal mass of the waterproof capsule. As a result of this time lag, if a clothes washers wash water temperature were to reach 135 F
only briefly, then a submersible temperature logger may not record that 135 F had been reached. DOE
concludes that, similar to temperature indicator labels, a submersible temperature logger indicating a temperature higher than 135 F can provide confirmation that the water temperature reached 135 F, but failure to record a temperature of 135 F does not necessarily determine that the temperature threshold for the Extra-Hot Wash cycle has not been achieved. For clothes washers with sustained water temperatures greater than 135 F but less than 140 F, submersible temperature loggers may provide potentially reduced 24 See e.g., www.maximintegrated.com/en/
products/ibutton-one-wire/data-loggers/
DS1923.html/product-details/tabs-3, www.maximintegrated.com/en/products/ibuttonone-wire/ibutton/DS9107.html, and www.maximintegrated.com/en/products/interface/
universal-serial-bus/DS9490.html.

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test burden, compared to using temperature indicator labels.
For Appendix J2, DOE is proposing to allow the use of a submersible temperature logger as an additional temperature measurement option to confirm that an Extra-Hot Wash temperature greater than 135 F has been achieved during the wash cycle. DOE is proposing that the submersible temperature logger must have a time resolution of at least 1 data point every 5 seconds and a temperature measurement accuracy of 1 F. As described currently for temperature indicator labels, DOE would include a note that failure to measure a temperature of 135 F would not necessarily indicate of the lack of an Extra-Hot Wash temperature. However, such a result would not be conclusive due to the lack of verification of that the required water temperature was achieved, in which case an alternative method must be used to confirm that an extra-hot wash temperature greater than 135 F has been achieved during the wash cycle.
Because DOE is proposing to change the Extra-Hot Wash water temperature threshold to 140 F for the proposed new Appendix J, commercially available temperature indicator labels with indications at 140 F would be able to be used more readily to determine whether the water temperature reached the Extra-Hot Wash temperature threshold.
DOE is also proposing to allow the usage of a submersible temperature logger in the proposed new Appendix J
as an option to confirm that an ExtraHot Wash temperature greater than 140 F has been achieved during the wash cycle. Like the temperature threshold of 135 F in Appendix J2, failure to measure a temperature of 140 F would not necessarily indicate the lack of an Extra-Hot Wash temperature. However, such a result would not be conclusive due to the lack of verification of that the required water temperature was achieved, in which case an alternative method must be used to confirm that an extra-hot wash temperature greater than 140 F has been achieved during the wash cycle.
Lastly, DOE is proposing to move the description of allowable temperature measuring devices from section 3.3 of Appendix J2 to section 2.5.4 of both Appendix J2 and the proposed new Appendix J Water and air temperature measuring devices, specifying the use of non-reversible temperature indicator labels in new section 2.5.4.1, and adding specifications for the use of submersible temperature loggers to new section 2.5.4.2 of both Appendix J2 and the proposed new Appendix J.

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DOE requests comment on its proposal to allow the use of a submersible temperature logger in Appendix J2 and the proposed new Appendix J as an option to confirm that an Extra-Hot Wash temperature greater than the Extra-Hot Wash threshold has been achieved during the wash cycle.
DOE requests data and information confirming or disputing DOEs discussion of the benefits and limitations of using a submersible temperature logger, including DOEs determination that a submersible loggers failure to measure a temperature greater than the Extra-Hot Wash threshold does not necessarily indicate that the cycle under test does not meet the definition of an Extra-Hot Wash/
Cold Rinse cycle.
5. Pre-Conditioning Requirements Section 2.11 of Appendix J2 specifies the procedure for clothes washer preconditioning. The current preconditioning procedure requires that any clothes washer that has not been filled with water in the preceding 96
hours, or any water-heating clothes washer that has not been in the test room at the specified ambient conditions for 8 hours, must be preconditioned by running it through a Cold Rinse cycle and then draining it to ensure that the hose, pump, and sump are filled with water. The purpose of pre-conditioning is to promote repeatability and reproducibility of test results by ensuring a consistent starting state for each test, as well as to promote the representativeness of test results by ensuring that the clothes washer is operated consistent with the defined ambient conditions. In particular, the additional specification for waterheating clothes washers was first suggested in a supplemental NOPR
published on April 22, 1996, April 1996 SNOPR, in which DOE
expressed concern about the testing of water-heating clothes washers that may have been stored at a temperature outside of the specified ambient temperature range 75 F 5 F prior to testing. 61 FR 17589, 1759417595. DOE
stated that the energy consumed in a water-heating clothes washer may be affected by the ambient temperature. Id.
Thus, if the ambient temperature prior to and during testing is relatively hot, then less energy will be consumed than under typical operating conditions, i.e., the test will understate the clothes washers energy consumption. Id.
Conversely, if the ambient temperature prior to and during the test is relatively cold, then the energy consumption will be overstated. Id. In the subsequent August 1997 Final Rule, DOE added the
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