[Federal Register Volume 83, Number 220 (Wednesday, November 14, 2018)]
[Proposed Rules]
[Pages 56746-56750]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-24697]


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DEPARTMENT OF ENERGY

10 CFR Part 430


Energy Conservation Program: Test Procedures for Consumer Warm 
Air Furnaces, Notice of Petition for Rulemaking

AGENCY: Office of Energy Efficiency and Renewable Energy, Department of 
Energy.

ACTION: Notice of petition for rulemaking; request for comment.

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SUMMARY: On October 12, 2018, the Department of Energy (DOE) received a 
petition from the Air-Conditioning, Heating, and Refrigeration 
Institute (AHRI) asking DOE to initiate notice-and-comment rulemaking 
to develop a new, unified test procedure for residential furnaces which 
would replace the three currently required performance metrics (i.e., 
annual fuel utilization efficiency (AFUE), fan efficiency ratio (FER), 
and standby mode/off mode energy consumption (PW,SB and 
PW,OFF)) with a single new metric (AFUE2). As the petition 
acknowledges, a combined metric would necessitate a translation of the 
existing energy conservation standards applicable to residential 
furnaces using an appropriate crosswalk. Through this announcement, DOE 
seeks comment on the petition, as well as any data or information that 
could be used in DOE's determination whether to proceed with the 
petition.

DATES: Written comments and information are requested on or before 
January 14, 2019.

ADDRESSES: Interested persons are encouraged to submit comments, 
identified by ``Test Procedure for Consumer Warm Air Furnaces 
Petition,'' by any of the following methods:
    Federal eRulemaking Portal: http://www.regulations.gov. Follow the 
instructions for submitting comments.
    Email: [email protected]. Include Docket No. EERE-
2018-BT-PET-0017 in the subject line of the message.
    Postal Mail: Appliance and Equipment Standards Program, U.S. 
Department of Energy, Building Technologies Office, Mailstop EE-5B, 
1000 Independence Avenue SW, Washington, DC 20585-0121. If possible, 
please submit all items on a compact disc (CD), in which case it is not 
necessary to include printed copies.
    Hand Delivery/Courier: Appliance and Equipment Standards Program, 
U.S. Department of Energy, Building Technologies Office, 950 L'Enfant 
Plaza SW, Suite 600, Washington, DC 20024. Telephone: (202) 287-1445. 
If possible, please submit all items on a CD, in which case it is not 
necessary to include printed copies.
    Docket: For access to the docket to read background documents, or 
comments received, go to the Federal eRulemaking Portal at: http://www.regulations.gov/docket?D=EERE-2018-BT-PET-0017.

FOR FURTHER INFORMATION CONTACT: Mr. Eric Stas, U.S. Department of 
Energy, Office of the General Counsel, 1000 Independence Avenue SW, 
Washington, DC 20585. Telephone: (202) 586-9507. Email: 
[email protected].

SUPPLEMENTARY INFORMATION: The Administrative Procedure Act (APA), 5 
U.S.C. 551 et seq., provides among other things, that ``[e]ach agency 
shall give an interested person the right to petition for the issuance, 
amendment, or repeal of a rule.'' (5 U.S.C. 553(e)) DOE received a 
petition from AHRI, as described in this notice and set forth verbatim 
below,\1\ requesting that DOE

[[Page 56747]]

develop a new test procedure for residential furnaces with a combined 
metric (annual fuel utilization efficiency 2 (AFUE2)), which would 
encompass the three existing metrics currently required (i.e., AFUE, 
FER, and PW,SB/PW,OFF). In promulgating this 
petition for public comment, DOE is seeking views on whether it should 
grant the petition and undertake a rulemaking to consider the proposal 
contained in the petition. By seeking comment on whether to grant this 
petition, DOE takes no position at this time regarding the merits of 
the suggested rulemaking or the assertions in AHRI's petition.
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    \1\ Attachments and data submitted by AHRI with its petition for 
rulemaking are available in the docket at http://www.regulations.gov/docket?D=EERE-2018-BT-PET-0017.
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    In its petition, AHRI requests that DOE undertake notice-and-
comment rulemaking to develop a new test procedure for residential warm 
air furnaces that would consolidate all aspects of the regulation of 
such furnaces using a single metric (AFUE2) and yield a unified 
timeline for rulemaking and compliance. Currently, residential furnaces 
are subject to separate requirements for heating (AFUE), air 
circulation (FER), and standby mode and off mode energy consumptions 
(power in watts for standby mode and off mode (PW,SB and 
PW,OFF)). The petitioner asserts that its recommended single 
metric would reduce regulatory burden on manufacturers by streamlining 
test requirements and aligning regulatory review schedules, thereby 
promoting design flexibility and product innovation. The petitioner 
further asserts that consumers would also benefit by having a single, 
combined metric for product comparison purposes and by receiving some 
portion of anticipated cost savings, all of which could be achieved 
without sacrificing energy savings. As the petition acknowledges, a 
combined metric would necessitate a translation of the existing energy 
conservation standards applicable to residential furnaces using an 
appropriate crosswalk.
    DOE welcomes comments and views of interested parties on any aspect 
of the petition for rulemaking.
    In conjunction with its petition, AHRI requested that DOE not 
enforce the reporting, certification and compliance obligations related 
to the furnace fan energy conservation standards (for which compliance 
is required on July 3, 2019) pending consideration of this petition for 
rulemaking.\2\ In response to AHRI's request, DOE is issuing an 
enforcement policy regarding enforcement of the furnace fan standards. 
Further details will be provided on the DOE website.\3\
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    \2\ AHRI's request is available in the docket at http://www.regulations.gov/docket?D=EERE-2018-BT-PET-0017.
    \3\ See http://www.energy.gov/gc/enforcement/.
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Submission of Comments

    DOE invites all interested parties to submit in writing by January 
14, 2019 comments and information regarding this petition.
    Submitting comments via http://www.regulations.gov. The http://www.regulations.gov webpage will require you to provide your name and 
contact information prior to submitting comments. Your contact 
information will be viewable to DOE Building Technologies staff only. 
Your contact information will not be publicly viewable except for your 
first and last names, organization name (if any), and submitter 
representative name (if any). If your comment is not processed properly 
because of technical difficulties, DOE will use this information to 
contact you. If DOE cannot read your comment due to technical 
difficulties and cannot contact you for clarification, DOE may not be 
able to consider your comment.
    However, your contact information will be publicly viewable if you 
include it in the comment or in any documents attached to your comment. 
Any information that you do not want to be publicly viewable should not 
be included in your comment, nor in any document attached to your 
comment. Persons viewing comments will see only first and last names, 
organization names, correspondence containing comments, and any 
documents submitted with the comments.
    Do not submit to http://www.regulations.gov information for which 
disclosure is restricted by statute, such as trade secrets and 
commercial or financial information (hereinafter referred to as 
Confidential Business Information (CBI)). Comments submitted through 
http://www.regulations.gov cannot be claimed as CBI. Comments received 
through the website will waive any CBI claims for the information 
submitted. For information on submitting CBI, see the Confidential 
Business Information section.
    DOE processes submissions made through http://www.regulations.gov 
before posting. Normally, comments will be posted within a few days of 
being submitted. However, if large volumes of comments are being 
processed simultaneously, your comment may not be viewable for up to 
several weeks. Please keep the comment tracking number that http://www.regulations.gov provides after you have successfully uploaded your 
comment.
    Submitting comments via email, hand delivery, or postal mail. 
Comments and documents via email, hand delivery, or postal mail will 
also be posted to http://www.regulations.gov. If you do not want your 
personal contact information to be publicly viewable, do not include it 
in your comment or any accompanying documents. Instead, provide your 
contact information on a cover letter. Include your first and last 
names, email address, telephone number, and optional mailing address. 
The cover letter will not be publicly viewable as long as it does not 
include any comments.
    Include contact information in your cover letter each time you 
submit comments, data, documents, and other information to DOE. If you 
submit via postal mail or hand delivery, please provide all items on a 
CD, if feasible, in which case it is not necessary to submit printed 
copies. No telefacsimiles (faxes) will be accepted.
    Comments, data, and other information submitted electronically 
should be provided in PDF (preferred), Microsoft Word or Excel, 
WordPerfect, or text (ASCII) file format. Provide documents that are 
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Documents should not include any special characters or any form of 
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signature of the author.
    Campaign form letters. Please submit campaign form letters by the 
originating organization in batches of between 50 to 500 form letters 
per PDF or as one form letter with a list of supporters' names compiled 
into one or more PDFs. This reduces comment processing and posting 
time.
    Confidential Business Information. Pursuant to 10 CFR 1004.11, any 
person submitting information that he or she believes to be 
confidential and exempt by law from public disclosure should submit via 
email, postal mail, or hand delivery two well-marked copies: One copy 
of the document marked ``Confidential'' including all the information 
believed to be confidential, and one copy of the document marked ``Non-
confidential'' with the information believed to be confidential 
deleted. Submit these documents via email or on a CD, if feasible. DOE 
will make its own determination about the confidential status of the 
information and treat it according to its determination.

[[Page 56748]]

    Factors of interest to DOE when evaluating requests to treat 
submitted information as confidential include: (1) A description of the 
items; (2) whether and why such items are customarily treated as 
confidential within the industry; (3) whether the information is 
generally known by or available from other sources; (4) whether the 
information has previously been made available to others without 
obligation concerning its confidentiality; (5) an explanation of the 
competitive injury to the submitting person which would result from 
public disclosure; (6) when such information might lose its 
confidential character due to the passage of time, and (7) why 
disclosure of the information would be contrary to the public interest.
    It is DOE's policy that all comments may be included in the public 
docket, without change and as received, including any personal 
information provided in the comments (except information deemed to be 
exempt from public disclosure).
    DOE considers public participation to be a very important part of 
its process for considering rulemaking petitions. DOE actively 
encourages the participation and interaction of the public during the 
comment period. Interactions with and between members of the public 
provide a balanced discussion of the issues and assist DOE in 
determining how to proceed with a petition. Anyone who wishes to be 
added to DOE mailing list to receive future notices and information 
about this petition should contact Appliance and Equipment Standards 
Program staff at (202) 287-1445 or via email at 
[email protected].

Approval of the Office of the Secretary

    The Secretary of Energy has approved publication of this notice of 
petition for rulemaking.

    Signed in Washington, DC, on November 2, 2018.
Kathleen B. Hogan,
Deputy Assistant Secretary for Energy Efficiency, Energy Efficiency and 
Renewable Energy.

Before the

UNITED STATES DEPARTMENT OF ENERGY
Office of Energy Efficiency and Renewable Energy

Energy Conservation Program:
Test Procedures for Consumer Warm Air Furnaces

PETITION FOR A RULEMAKING

    The Air-Conditioning, Heating, and Refrigeration Institute 
(AHRI) submits this Petition for a Rulemaking to formally request 
that the Department of Energy (DOE or the Department) promulgate a 
new test procedure for residential furnaces pursuant to its 
authority under the Energy Policy and Conservation Act (EPCA), 42 
U.S.C. Sec.  6293. Currently, three separate Federal test procedures 
measure three different performance characteristics of consumer 
warm-air furnaces: fuel efficiency (AFUE), air-movement efficiency 
(FER), and stand-by/off-mode energy consumption. AHRI petitions DOE 
to establish a new test procedure that will designate a single 
efficiency metric for the entire product and replace the existing 
test procedures for all three performance characteristics. A whole-
product test procedure and single performance metric will reduce 
regulatory burden and increase opportunity for innovation.

AHRI Petitions DOE to Conduct a Notice-and-Comment Rulemaking to Adopt 
the AFUE2 Test Procedure and Metric for Residential Furnaces

    AHRI is the trade association representing air conditioning, 
heating, commercial refrigeration, and ventilation equipment 
manufacturers. AHRI advocates for the HVACR industry, administers a 
third-party certification program that verifies the performance of 
HVACR equipment, and publishes global industry standards. Many of 
AHRI's 315 members design, develop, and manufacture residential 
furnaces. Any AHRI member that manufactures a furnace for sale in 
the United States or Canada is eligible to participate in AHRI's 
Furnace Product Section. The Furnace Engineering Committee is a 
subcommittee of the Furnace Product Section and is comprised of 
furnace product engineers with decades of experience. Over a year 
ago, the Furnace Engineering Committee identified challenges with 
the existing residential furnace Federal test procedures and has 
dedicated its time and resources to developing a more functional and 
facile test procedure. The goal of the new test procedure is to 
combine the three existing furnace test procedures into a single 
test using a single metric: AFUE2.\4\
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    \4\ During previous discussions with DOE about unrelated 
performance metric changes, DOE staff indicated that the name of a 
metric is mandated by statute, and therefore any metric change must 
retain the codified nomenclature. If upon further review, DOE 
determines that the nomenclature, like the test procedure, is 
mutable, then AHRI encourages DOE to adopt a fitting identifier for 
the metric. AHRI is not bound to ``AFUE2.''
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I. Description of the Test Method and Metric

    The AFUE2 test procedure is based upon the methods established 
by the ASHRAE 103-2017 AFUE test procedure; \5\ the Federal FER test 
procedure (10 CFR Sec.  430 Appx AA); and the Federal stand-by loss/
off-mode test procedure (10 CFR Sec.  430 Appx N). The AFUE2 metric 
accounts for furnace fuel, fan power, and stand-by and off-mode 
power consumption. The measured value represents the sum of usable 
heat and fan benefit, divided by the total fuel and electricity 
consumed. A draft of the test procedure is attached.\6\ For the 
benefit of the Department and the public, a description of the 
notable features of the test procedure and metric are provided 
below.
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    \5\ AFUE2 fuel efficiency measures are based primarily on ASHRAE 
103-2017. DOE has codified ASHRAE 103-1993 in 10 CFR Sec.  430 Appx 
N. The relevant portions of the ASHRAE 103-2017 that are referenced 
in the AFUE2 test procedure are similar to the equivalent provisions 
in ASHRAE 103-1993/10 CFR 430 Appendix N. Other provisions, related 
to cyclic testing, are only applicable to products with draft hoods 
and draft diverter technologies.
    \6\ Exhibit 1 AFUE2 Draft Test Procedure.
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    The first step in the process is to measure the fuel 
consumption. The furnace is set up and measurements are taken in 
accordance with the most current industry test standard, ASHRAE 103-
2017.\7\ The AFUE2 test procedure differs most significantly from 
the ASHRAE 103-2017 test procedure by including only steady-state 
testing and excluding cyclic testing for fuel and oil furnace models 
currently available in the U.S. market.\8\ Cyclic testing is time 
consuming and requires the execution of complex calculations, and 
the value of the cyclic testing is limited at best. AHRI's data 
indicates that for the vast majority of modern products, the steady-
state efficiency accurately represents the AFUE efficiency, and 
cyclic testing and calculations are unnecessary. Based on an 
analysis of over 100 models, only a handful demonstrated greater 
than a 1% difference between measured AFUE and steady-state 
efficiencies (less jacket loss).\9\ The average difference between 
actual AFUE and steady-state efficiencies is close to zero. The 
elimination of cyclic testing for currently compliant products is 
warranted and reduces testing burden without sacrificing accuracy. 
Notably, to close any loopholes that might permit technology 
backsliding, the test procedure specifies that products that 
incorporate draft hoods and draft diverter technologies must 
complete the cyclic testing procedures published in ASHRAE 103-2017. 
AHRI is not aware of any furnaces on the market today that 
incorporate these technologies.
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    \7\ Per Note 2, DOE regulations currently refer to the ASHRAE 
103-1993, but the test set-up is the same with some clarifications.
    \8\ These are models with power burners as defined by the DOE 
test procedures.
    \9\ Exhibit 2: Calculations reflecting steady-state efficiency 
and measured AFUE efficiency.
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    After the fuel consumption is measured, the next step in the 
procedure is to turn off the equipment and measure the electrical 
consumption of the furnace when not in heating mode. The procedure 
for measuring and calculating stand-by and off-mode energy use is 
identical to the Federal method.
    Finally, the ventilation energy consumption is measured. The 
AFUE2 test method for measuring and calculating ventilation energy 
consumption is based on the FER test procedure, with some 
significant changes. First, the AFUE2 test procedure describes set-
up and settings for the ventilation test in greater detail than the 
FER test procedure. For example, the AFUE2 test procedure 
specifically identifies the location of the external static pressure 
taps. These set-up descriptions are intended to reduce test-to-test 
variability.
    The AFUE2 test procedure also clarifies the hierarchy of speed 
taps settings for the

[[Page 56749]]

various modes of ventilation testing. The FER procedure directs 
manufacturers to test using the ``maximum airflow settings,'' but 
this description is ambiguous and can lead to absurd results 
depending on its interpretation. The AFUE2 test procedure specifies 
that the airflow be set according to the installation and operations 
manual, and the test procedure prescribes which airflow setting 
should be selected if there is overlap between operating modes. If 
the manual identifies the maximum airflow during the heating mode, 
and the second highest airflow during cooling mode, then the speed 
taps should be set accordingly: first heating, then cooling. If the 
heating and cooling mode airflows are the same, then the cooling 
mode speed tap is set first, which reflects how the furnace would 
operate in the field.
    Finally, manufacturers have been challenged with the 
repeatability of the FER test. Testing has demonstrated more than a 
5% difference among tests on the same unit. The poor repeatability 
of the FER measurements is resolved in AFUE2 due to the relatively 
small proportion of the electrical consumption. The AFUE fuel 
efficiency test is well established and repeatable, so overall AFUE2 
will be much more repeatable than FER.

II. The AFUE2 Metric Prevents Double Regulation

    AFUE2 efficiency is the sum of the fan benefit and usable heat, 
divided by electric and fuel consumption, all weighted by operating 
hours. The calculations for AFUE2 and FER are based on different 
operating hours. The hours differ in two meaningful ways: (1) The 
cooling hours are derived directly from AHRI Standard 210/240, which 
is incorporated by reference into the Federal standard for central 
air conditioners; and (2) package equipment is ascribed zero fan 
operating hours in the cooling mode. The AFUE2 test procedure relies 
on cooling mode operating hours from AHRI Standard 210/240 based on 
the simple logic that air conditioners conduct the cooling during 
furnace-ventilation cooling mode and air conditioner operating hours 
are already defined in AHRI 210/240. Harmonizing the two standards 
is preferable and logical, and assigning different operating hours 
in two different regulations for what is essentially the same 
product is arbitrary. Packaged equipment is assigned zero operating 
hours because the ventilation electricity consumption is already 
directly regulated by DOE's air conditioning standard. DOE is 
strictly prohibited from regulating the same product twice. Two 
separate regulations (SEER and FER) imposed on the same component of 
a single type of equipment is contrary to DOE's statutory authority. 
Eliminating operating hours for packaged equipment permits the 
furnace to be measured by AFUE2 without double-regulating the 
ventilation energy use.
    Aside from the above distinctions, most of the methods and 
measurements from the currently applicable test procedures and 
metrics are reflected in the AFUE2 test procedure and metric. The 
ultimate goal of combining the AFUE, FER, and stand-by/off-mode test 
procedures is to streamline the testing requirements, align 
regulatory review schedules, and reduce regulatory burden.

III. Establishing the AFUE2 as the Federal Test Procedure and Metric Is 
in the Public Interest

A. A Combined Test Procedure and Metric Reduces Burden

    The AFUE2 test procedure and metric will decrease the regulatory 
burden. At least six different regulations apply to consumer furnace 
efficiency: (1) AFUE test procedure (2) AFUE energy conservation 
standard (3) FER test procedure (4) FER energy conservation standard 
(5) stand-by loss/off-mode test procedure (6) stand-by loss/off-mode 
energy conservation standard. Each of these regulations is subject 
to mandatory review--every six years for energy conservation 
standards and every seven years for test procedures. Each of the six 
applicable regulations follows a different schedule, which places 
the equipment manufacturers, distributors, contractors and DOE in a 
constant state of change and adjustment. The AFUE test procedure was 
most recently finalized in 2016. DOE is required to review it again 
by 2023. The FER test procedure was finalized in 2014; it will be 
reviewed by 2021. The stand-by loss test procedure was finalized in 
2013; it will be reviewed by 2020. Stand-by and off-mode test 
procedures were amended in 2012 and are due for review in 2019. 
Energy conservation standards for stand-by and FER were published in 
2013 and 2014, respectively, while the AFUE standard has been under 
review since 2011. Industry expects that energy conservation 
standards will be reviewed again in 2019 and 2020. The Department is 
perennially reviewing and amending furnace regulations, while 
manufacturers pour time and resources into public comments, testing, 
redesign, and ever-shifting compliance requirements. The total 
reduction in regulatory burden resulting from implementation of 
AFUE2 will save manufacturers more than $250 million over thirty 
years.\10\
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    \10\ Exhibit 3, ``Estimated Benefits of AFUE2''
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    If DOE adopts the AFUE2 test procedure that assesses all three 
performance characteristics simultaneously, then the Department 
would only have to conduct a test procedure rulemaking process once 
every seven years. Similarly, combining the performance measurements 
into a single metric will obviate the need for three separate energy 
conservation standards, and DOE will only have to review energy 
conservation standards once every six years.
    Resource savings to the Department are relevant, but pale in 
comparison to the significant savings afforded manufacturers, and 
consequently consumers, if DOE were to combine the test metric and 
eliminate four of six rulemaking review cycles. Multiple discordant 
regulatory requirements generate unnecessary costs. For example, 
manufacturers must run an FER test, and a separate AFUE test, and 
stand-by loss testing. The incremental costs of the equipment, the 
set-up, mounting on the test stand, the laboratory time, and 
technician costs can be drastically reduced by conducting one test 
instead of three. The alignment of review cycles and redesign cycles 
further reduces repetitive testing required for design development 
and safety certifications. The AFUE2 test procedure mimics many of 
the existing test methods, but the merging of the instances of 
active testing cuts superfluous costs.\11\
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    \11\ Id.
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    Every time DOE makes an amendment to any of the applicable 
regulations, manufacturers must redesign equipment, make capital 
investments to update manufacturing facilities, republish all 
marketing literature, and educate distributors, contractors, and 
consumers about the change. Merging six rulemaking cycles into two 
dramatically reduces the compliance burden associated with 
regulatory changes because changes will occur two-thirds less 
frequently. Manufacturers can pass on significant savings to 
consumers by making all required changes to their furnaces within a 
single design-cycle rather than spending resources on unnecessary 
tooling, design, testing, production introduction, training and 
other related costs.\12\ Less frequent regulatory changes offer 
greater certainty to manufacturers, which promotes investment in 
innovation and product improvements.
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    \12\ Id.
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    Crucially, reduced costs for manufacturers and consumers does 
not translate to lost energy savings. Fewer regulatory review cycles 
does not mean regulatory roll-back or less oversight. AHRI is 
confident that DOE will take no less interest in the 
representativeness and effectiveness of the applicable test 
procedure as a result of this change. And each energy conservation 
standard review remains targeted at achieving the ``maximum energy 
savings'' that are economically justified. Ultimately, DOE will be 
able to look at the furnace as a whole and make necessary 
adjustments to testing and energy conservation during a single 
rulemaking review instead of executing its mandate piecemeal.

B. The AFUE2 Test Procedure and Metric Will Increase Innovation

    As discussed above, the AFUE2 test metric combines three 
performance characteristics into a single measure. The current 
approach fragments furnace efficiency into three separate minimum 
requirements: stand-by/off mode, ventilation, and fuel efficiency. 
The practice of setting minimums for discrete characteristics of a 
single product is overly prescriptive; this approach drives product 
development in only one direction. Component level regulation 
restricts design choices between manufacturers. AFUE2 gives 
manufacturers more design flexibility on how they achieve overall 
energy savings. The AFUE2 test method and metric requires 
manufacturers to account for all three performance characteristics, 
but it promotes innovation by allowing for internal efficiency 
trade-offs at the product level. Product designers must be given 
license to develop better ways to save fuel and electricity while 
improving the quality and performance of the equipment. A combined 
metric saves energy

[[Page 56750]]

without prescribing multiple engineering requirements.

C. The Combined Metric Is Easier for Consumers To Use and 
Understand

    AFUE2 is easier for consumers to understand. It is difficult for 
the average consumer to distinguish between the fuel efficiency of a 
furnace, the electric efficiency of the furnace fans and the watts 
saved or lost during stand-by or off-mode. The average consumer 
considers three separate measures for a single product unnecessarily 
complex and unhelpful. A single metric will serve as an easy basis 
of comparison between all fuel furnace types. A simple label can 
concisely represent the single efficiency metric and provide 
approximate costs of operation, which is a chief concern of 
consumers.
    The AFUE2 test method and metric improves consumer utility of 
the efficiency information. Furnace manufacturers question the 
technical viability of the FER test procedure and metric. A separate 
regulation for ventilation energy disproportionately emphasizes the 
electrical consumption of a furnace, when the fuel consumption is 
much more significant to consumers. A representative proportion of 
energy use by both parts is described by AFUE2.

IV. Metric Changes Require a Crosswalk

    AHRI requests that DOE adopt the AFUE2 test procedure pursuant 
to a notice-and-comment rulemaking. The Department has statutory 
authority to amend test procedures under 42 U.S.C. 6293(e) of EPCA. 
The statute prescribes steps to establish a crosswalk from the 
previous metric to the new metric. Specifically, EPCA states that 
DOE ``shall determine, in the rulemaking carried out with respect to 
prescribing such procedure, to what extent, if any, the proposed 
test procedure would alter the measured energy efficiency . . . of a 
covered product as determined under the existing test procedure.''
    The transition from three independent metrics to one integrated 
product metric will demonstrably ``alter the measured efficiency.'' 
As such, DOE ``shall amend the applicable energy conservation 
standard during the rulemaking carried out with respect to such test 
procedure. In determining the amended energy conservation standard, 
the Secretary shall measure, pursuant to the amended test procedure, 
the energy efficiency . . . of a representative sample of covered 
products that minimally comply with the existing standard. The 
average of such energy efficiency . . . determined under the amended 
test procedure shall constitute the amended conservation standard 
for the applicable covered products.''
    AHRI has begun analyzing testing data to assist in the 
development of the required crosswalk. A representative sample of 
furnaces that are ``minimally compliant'' with energy conservation 
minimums at each furnace product class will be tested, rated, and 
averaged. This average will provide a degradation factor that can be 
applied to all furnaces within that product class to ensure 
equivalence across product lines with the current AFUE metric. 
Uniquely, this particular crosswalk requires translation from three 
performance characteristics to one product efficiency measure, and 
each of those performance characteristic standards are currently 
further divided into separate product classes. It will likely be 
necessary to adjust the calculated baseline efficiencies to ensure 
that the maximum permissible energy use of the furnace reflects 
minimally compliant furnaces at each product class for each metric.
    For example, minimally compliant non-weatherized natural gas 
furnaces are currently rated with an AFUE of 80%. Based on 
preliminary estimates, after the application of the degradation 
factor, the baseline efficiencies for the AFUE2 rating is 77%.\13\ 
The FER and stand-by loss regulations also specify different product 
classes for which the minimally compliant product will also have to 
be measured and averaged. Using this data, the baseline minimum 
efficiencies can be adjusted upward to ensure all current energy use 
is appropriately captured. More testing is required to assign values 
to this methodology.
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    \13\ The 3% degradation factor is based on preliminary findings. 
AHRI will provide more substantial testing to support a degradation 
factor as more tests are conducted. The preliminary value will 
likely change with more data.
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    Crosswalks can create havoc in the market if not carefully 
executed. AHRI urges DOE to work with stakeholders to ensure a 
precise and simple transition from ``AFUE + FER + Stand-by/off-
mode'' to ``AFUE2.'' For clarity, AHRI recommends that the baseline 
efficiency for translation is the AFUE minimum for each residential 
furnace product class. Maintaining the established product class 
structure for residential furnaces will have the least disruptive 
impact on the market. As described above, these baseline 
efficiencies can be adjusted to ensure that maximum energy use and 
minimum efficiencies remain steady, but the decades-old definitions 
and classifications remain constant for ease of market adoption.

V. AHRI Requests a Prompt Response

    Finally, AHRI requests that DOE act promptly to initiate a 
notice-and-comment rulemaking to adopt the proffered test procedure 
and metric as soon as possible. The FER minimum efficiency standards 
go into effect in July of 2019, and DOE will have to expedite the 
release of a notice of proposed rulemaking to ensure that 
manufacturers do not have to comply with one metric and test 
procedure while preparing to comply with another. AHRI appreciates 
the consideration that DOE will give this petition and thanks the 
Department in advance for its attention to this petition.

    Signed,

Caroline Davidson-Hood,
General Counsel.

Air-Conditioning, Heating, and Refrigeration Institute
2311 Wilson Boulevard, Suite 400
Arlington, Virginia 22201
[email protected]
    (703) 600-0383

[FR Doc. 2018-24697 Filed 11-13-18; 8:45 am]
BILLING CODE 6450-01-P