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Federal Register / Vol. 86, No. 235 / Friday, December 10, 2021 / Proposed Rules
are needed to achieve the target capacity or sensible heat ratio SHR limit for an IEER cooling test. Perform critical parameter adjustments independently on each system as described in section 5.2 of appendix D1 to subpart F of part 431, with the following exceptions:
i Replace all references to certified critical parameter values with alternate critical parameter values as determined in paragraph s3iiiB of this section.
ii Determine CPMax from a CVP
conducted at full-load cooling conditions as the maximum value observed during the R2 period as described in Section C.4.4.2.3 of AHRI
12302021. If multiple components corresponding to a single parameter are present, determine CPMax at the point during the R2 period at which the average value across all components corresponding to that critical parameter is maximized.
PART 431ENERGY EFFICIENCY
PROGRAM FOR CERTAIN
COMMERCIAL AND INDUSTRIAL
EQUIPMENT
8. The authority citation for part 431
continues to read as follows:

Authority: 42 U.S.C 62916317; 28 U.S.C
2461 note.

9. Section 431.92 is amended by revising the definition of Integrated energy efficiency ratio, or IEER to read as follows:

431.92 Definitions concerning commercial air conditioners and heat pumps.

Integrated energy efficiency ratio, or IEER, means a weighted average calculation of mechanical cooling EERs determined for four load levels and corresponding rating conditions, expressed in Btu/watt-hour. IEER is measured per appendix A of this subpart for air-cooled small 65,000
Btu/h, large, and very large commercial package air conditioning and heating equipment and measured per appendix
D1 of this subpart for variable refrigerant flow multi-split air conditioners and heat pumps other than air-cooled with rated cooling capacity less than 65,000 Btu/h.

10. Amend 431.95 by:
a. Revising paragraph a;
b. Revising paragraph b6;
c. Adding paragraph b7; and d. Revising paragraph c2.
The revisions and addition read as follows:
431.95 Materials incorporated by reference.

a Certain material is incorporated by reference into this subpart with the approval of the Director of the Federal Register in accordance with 5 U.S.C.
552a and 1 CFR part 51. To enforce any edition other than that specified in this section, DOE must publish a document in the Federal Register and the material must be available to the public. All approved material is available for inspection at the U.S.
Department of Energy, Office of Energy Efficiency and Renewable Energy, Building Technologies Program, Sixth Floor, 950 LEnfant Plaza SW, Washington, DC 20024, 202 5869127, Buildings@ee.doe.gov, https
www.energy.gov/eere/buildings/
building-technologies-office, and may be obtained from the other sources in this section. It is also available for inspection at the National Archives and Records Administration NARA. For information on the availability of this material at NARA, email: fr.inspection@
nara.gov, or go to: www.archives.gov/
federal-register/cfr/ibr-locations.html.
b
6 ANSI/AHRI Standard 12302010, 2010 Standard for Performance Rating of Variable Refrigerant Flow VRF
Multi-Split Air-Conditioning and Heat Pump Equipment, approved August 2, 2010 and updated by addendum 1 in March 2011 AHRI 12302010, IBR
approved for 431.96 and appendix D
of this subpart.

7 AHRI Standard 12302021, Performance Rating of Variable Refrigerant Flow VRF Multi-Split AirConditioning and Heat Pump Equipment, published in 2021 AHRI
12302021, IBR approved for appendix D1 of this subpart.
c
2 ANSI/ASHRAE Standard 372009, ANSI/ASHRAE 372009, Methods of Testing for Rating Electrically Driven Unitary Air-Conditioning and Heat Pump Equipment, including Errata Sheet issued October 3, 2016, ASHRAE
approved June 24, 2009, IBR approved for 431.96 and appendices A and D1
of this subpart.

11. Amend 431.96 by:
a. Revising paragraph b1;
b. Redesignating table 1 to paragraph b2 as table 1 to 431.96; and c. Revising newly redesignated table 1
to 431.96.
The revisions read as follows:
431.96 Uniform test method for the measurement of energy efficiency of commercial air conditioners and heat pumps.

b Testing and calculations. 1
Determine the energy efficiency of each type of covered equipment by conducting the test procedures listed in table 1 to this section along with any additional testing provisions set forth in paragraphs c through g of this section and appendices A through D1 of this subpart, that apply to the energy efficiency descriptor for that equipment, category, and cooling capacity. The omitted sections of the test procedures listed in table 1 to this section must not be used. For equipment with multiple appendices listed in table 1 to this section, consult the notes at the beginning of those appendices to determine the applicable appendix to use for testing.
2

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TABLE 1 TO 431.96TEST PROCEDURES FOR COMMERCIAL AIR CONDITIONERS AND HEAT PUMPS
Additional test procedure provisions as indicated in the listed paragraphs of this section
Equipment type
Category
Cooling capacity
Energy efficiency descriptor
Use tests, conditions, and procedures 1 in
Small Commercial Package Air-Conditioning and Heating Equipment.

Air-Cooled, 3-Phase, AC and HP.

<65,000 Btu/h

SEER and HSPF

AHRI 210/2402008
omit section 6.5.

None.

Air-Cooled AC and HP.
Water-Cooled and EvaporativelyCooled AC.

65,000 Btu/h and <135,000 Btu/h. <65,000 Btu/h

EER, IEER, and COP.
EER

Appendix A of this subpart.
AHRI 210/2402008
omit section 6.5.

None.

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Paragraphs c and e.