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Federal Register / Vol. 86, No. 56 / Thursday, March 25, 2021 / Proposed Rules
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TABLE II.1TECHNOLOGY OPTIONS FOR CONSUMER BOILERS CONSIDERED IN THE DEVELOPMENT OF THE JANUARY 2016
FINAL RULE
Heat exchanger improvements.
Modulating operation.
Dampers.
Direct vent.
Pulse combustion.
Premix burners.
Burner derating.
Delayed-action oil pump solenoid valve.
Electronic ignition.
Low-pressure air-atomized oil burner.
Transformer improvements standby mode and off mode.
Control relay for models with brushless permanent magnet motors standby mode and off mode.
Switching mode power supply standby mode and off mode.
Technology already in baseline units, so not considered further.
Screened-out technology.

DOE seeks comment on any changes to these technology options that could affect DOEs evaluation of whether energy conservation standards need to be amended. DOE also seeks comment on whether there are any other technology options that DOE should consider in its analysis.
While DOEs request for information is not limited to the following issues, DOE is particularly interested in comment, information, and data on the following:
Issue 10: DOE seeks information on technologies that may impact the efficiency of consumer boilers as measured according to the DOE test procedure. DOE also seeks information on how these technologies may have changed since they were considered in the January 2016 final rule analysis.
Specifically, DOE seeks information on the range of efficiencies or performance characteristics that are currently available for each technology option.
Issue 11: DOE seeks comment on other technology options that it should consider for inclusion in its analysis and whether these technologies would be expected to impact product features or consumer utility of consumer boilers.
DOE defines the max-tech efficiency level to represent the theoretical maximum possible efficiency if all available design options are incorporated in a model. In the January 2016 final rule, the max-tech efficiency levels for AFUE corresponded to the maximum available AFUE levels in products on the market at the time of the analysis except for oil-fired hot water boilers for which the max-tech level was slightly below the maximum available level.5 For standby mode and 5 See the technical support document for the January 2016 final rule, Chapter 3, section 3.2.9 and chapter 5, section 5.4.4. Available at: https
www.regulations.gov/document/EERE-2012-BTSTD-0047-0070.

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off mode energy consumption, the maxtech efficiency levels i.e., the levels with the lowest amount of energy consumption were determined by starting with the baseline design and implementing design options based on cost-effectiveness until all available technologies were employed.6 At the time this RFI was drafted, based on data from the CCMS database, the maximum available AFUE efficiency levels currently on the market for the subject products are as follows: 86.1 percent for non-condensing gas-fired hot water boilers, 96.8 percent for condensing gasfired hot water boilers, 88.2 percent for oil-fired hot water boilers which are all non-condensing, 83.4 percent for gasfired steam boilers which are all noncondensing, and 86.5 percent oil-fired steam boilers which are all noncondensing. In the January 2016 final rule, DOE identified the max-tech level for standby mode and off mode consumption as follows: 9 watts for gasfired hot water boilers; 8 watts for gasfired steam, electric hot water, and electric steam boilers; and 11 watts for oil-fired hot water and oil-fired steam boilers. 81 FR 2320, 23452346 Jan. 15, 2016.
Issue 12: DOE seeks input on whether the maximum available AFUE efficiency levels are appropriate and technologically feasible for potential consideration as possible energy conservation standardsand if not, why not. DOE also seeks feedback on the design options incorporated at max-tech efficiency levels. As part of this request, DOE also seeks information as to whether there are limitations on the use of certain combinations of design options.
6 See the technical support document for the January 2016 final rule, chapter 5, section 5.4.2.
Available at: https www.regulations.gov/
document/EERE-2012-BT-STD-0047-0070.

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Issue 13: DOE seeks input on the maxtech standby mode and off mode efficiency levels. In particular, are morestringent i.e., lower standby mode and off mode efficiency levels technologically feasible that are appropriate for consideration as possible energy conservation standards, and if so, what are the design options incorporated at those levels. DOE also seeks information as to whether there are limitations on the use of certain combinations of design options.
D. Economic Justification In determining whether a proposed energy conservation standard is economically justified, DOE analyzes, among other things, the potential economic impact on consumers, manufacturers, and the Nation. DOE
seeks comment on whether there are economic barriers to the adoption of more-stringent energy conservation standards for consumer boilers. DOE
also seeks comment and data on any other aspects of its economic justification analysis from the January 2016 final rule that may indicate whether a more-stringent energy conservation standard would be economically justified or cost-effective.
While DOEs request for information is not limited to the following issues, DOE is particularly interested in comment, information, and data on the issues discussed in the following paragraphs.
In its analysis, DOE intends to take into account consumer prices from locations where ultra-low-NOX gas-fired hot water and steam boilers would be required by the compliance date for any amended standards, such as the Bay Area Air Quality Management District AQMD Regulation 9, Rule 6,7
7 Bay Area Air Quality Management District, Regulation 9: Inorganic Gaseous Pollutants; Rule 6:

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