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Federal Register / Vol. 86, No. 87 / Friday, May 7, 2021 / Proposed Rules TABLE II.4PREVIOUSLY SCREENED OUT TECHNOLOGY OPTIONS FROM THE JANUARY 2017 FINAL RULE
Screening criteria X = Basis for screening out Screened technology option Three-phase induction motors Standard, hugger, and HSSD ceiling fans
Beveled blades
Twisted blades
Blade attachments
Alternative blade materials
Occupancy, wind, and temperature sensors
Single-phase direct-drive induction motors Large diameter ceiling fans

Technological feasibility
Practicability to manufacture, install, and service
Adverse impact on product utility
Adverse impacts on health and safety
Uniquepathway proprietary technologies
X

X X
X X
X

X

Affected equipment classes are listed in the parenthetical.

Issue 13: DOE requests feedback on what impact, if any, the five screening criteria described in this section would have on each of the technology options listed in Table II.2 and Table II.3 of this document with respect to ceiling fans.
Similarly, DOE seeks information regarding how these same criteria would affect any other technology options not already identified in this document with respect to their potential use in ceiling fans.
Issue 14: DOE requests comment on which technology options are specific to air flow, as measured by the DOE test procedure. DOE is interested in which technology options, if any, provide both consumer comfort and improved energy efficiency. As such, DOE also requests data on consumer buying patterns and whether or not consumers have specific requests regarding blade shape and material, fan hub size and shape, and other aspects of the design.
3. Representative Ceiling Fan Blade Span Ceiling fans are sold with a range of diameters or blade spans. It is impractical to conduct a detailed engineering analysis on every possible blade span. As such, for the January 2017 Final Rule, DOE identified representative sizes for each ceiling fan product class to use as the basis for its engineering analysis. 82 FR 6826, 6852.
The representative unit sizes evaluated to support the January 2017 Final Rule are presented in Table II.5.

TABLE II.5REPRESENTATIVE CEILING
FAN DIAMETERS/BLADE SPANS USED
IN THE DEVELOPMENT OF THE JANUARY 2017 FINAL RULEContinued Representative unit sizes blade span
Product class
Standard
Hugger
HSSD
LDCF

16-inch 44-inch 52-inch 60-inch 44-inch 52-inch 36-inch 56-inch 8-foot 12-foot 20-foot
Issue 15: DOE requests feedback on whether the representative blade spans listed in Table II.5 of this document are representative for the respective ceiling fan product classes. If the blade spans listed in Table II.5 of this document are not representative for a given product class, DOE seeks data and supporting information on what blade spans are representative for each product class.
Specifically, DOE is interested in information about any units that would have a significantly different costefficiency curve from the representative units. For example, if certain technology options are not feasible for a given blade span or would significantly increase costs for blade spans above or below the representative units.

4. Baseline Efficiency Levels For each established product class, TABLE II.5REPRESENTATIVE CEILING DOE selects a baseline model as a FAN DIAMETERS/BLADE SPANS USED reference point against which any IN THE DEVELOPMENT OF THE JANUchanges resulting from new or amended energy conservation standards can be ARY 2017 FINAL RULE
measured. The baseline model in each product class represents the Representative Product class unit sizes characteristics of common or typical blade span products in that class. Typically, a VSD
13-inch baseline model is one that meets the
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current minimum energy conservation standards and provides basic consumer utility. Consistent with this analytical approach, DOE expects to consider the current minimum energy conservations standards which went into effect on January 1, 2020 to establish the baseline efficiency levels for each product class. The current standards for each product class are based on CFM/
W for small-diameter fans and on CFEI
for LDCFs. The current standards for ceiling fans are found at 10 CFR
430.32s.
Issue 16: DOE requests feedback on whether using the current established energy conservation standards for ceiling fans are appropriate baseline efficiency levels for DOE to apply to each product class in evaluating whether to amend the current energy conservation standards for these products. If the current energy conservation efficiency levels are not appropriate for use as baseline efficiency levels, DOE requests proposals for alternate baseline efficiency levels, supported by appropriate market and technical data.
Issue 17: DOE requests feedback on the appropriate baseline efficiency levels for any potential product classes that are not currently in place or for any contemplated combined product classes, as discussed in section II.A of this document. For potential new product classes, DOE requests energy use data to characterize the baseline efficiency level.
5. Standby Energy Consumption Metric As stated, LDCFs are no longer subject to the minimum efficiency requirements in terms of the CFM/W metric as established in the January 2017 Final Rule, 42 U.S.C. 6295ff6CiI, as codified instead, LDCFs are subject to standards in terms of the CFEI metric.
42 U.S.C. 6295ff6CiII, as
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