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khammond on DSKJM1Z7X2PROD with PROPOSALS3

Federal Register / Vol. 86, No. 127 / Wednesday, July 7, 2021 / Proposed Rules present, and air moving systems that have a common nominal moisture removal capacity.
3 Packaged terminal air conditioner PTAC or packaged terminal heat pump PTHP means all units manufactured by one manufacturer within a single equipment class, having the same primary energy source e.g., electric or gas, and which have the same or comparable compressors, same or comparable heat exchangers, and same or comparable air moving systems that have a cooling capacity within 300
Btu/h of one another.
4 Single package vertical units means all units manufactured by one manufacturer within a single equipment class, having the same primary energy source e.g., electric or gas, and which have the same or comparably performing compressors, heat exchangers, and air moving systems that have a rated cooling capacity within 1500 Btu/h of one another.
5 Small, large, and very large aircooled or water-cooled commercial package air conditioning and heating equipment means all units manufactured by one manufacturer within a single equipment class, having the same or comparably performing compressors, heat exchangers, and air moving systems that have a common nominal cooling capacity.
6 Small, large, and very large water source heat pump means all units manufactured by one manufacturer within a single equipment class, having the same primary energy source e.g., electric or gas, and which have the same or comparable compressors, same or comparable heat exchangers, and same or comparable nominal capacity.
7 Variable refrigerant flow systems means all units manufactured by one manufacturer within a single equipment class, having the same primary energy source e.g., electric or gas, and which have the same or comparably performing compressors that have a common nominal cooling capacity and the same heat rejection medium e.g., air or water includes VRF water source heat pumps.

Dehumidifying direct expansiondedicated outdoor air system, or DDX
DOAS, means a direct expansiondedicated outdoor air system that is capable of dehumidifying air to a 55 F
dew pointwhen operating under Standard Rating Condition A as specified in Table 4 or Table 5 of AHRI
9202020 incorporated by reference, see 431.95 with a barometric pressure of 29.92 in Hgfor any part of the range
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of airflow rates advertised in manufacturer materials, and has a moisture removal capacity of less than 324 lb/h.
Direct expansion-dedicated outdoor air system, or DXDOAS, means a category of small, large, or very large commercial package air-conditioning and heating equipment which is capable of providing ventilation and conditioning of 100-percent outdoor air or marketed in materials including but not limited to, specification sheets, insert sheets, and online materials as having such capability.

Integrated seasonal coefficient of performance 2, or ISCOP2, means a seasonal weighted-average heating efficiency for heat pump dedicated outdoor air systems, expressed in W/W, as measured according to appendix B of this subpart.
Integrated seasonal moisture removal efficiency 2, or ISMRE2, means a seasonal weighted average dehumidification efficiency for dedicated outdoor air systems, expressed in lbs. of moisture/kWh, as measured according to appendix B of this subpart.

Ventilation energy recovery system, or VERS, means a system that preconditions outdoor ventilation air entering the equipment through direct or indirect thermal and/or moisture exchange with the exhaust air, which is defined as the building air being exhausted to the outside from the equipment.

7. Section 431.95 is amended by:
a. Revising paragraph a and the introductory text to paragraph b;
b. Redesignating paragraphs b6 and 7 as b8 and 9;
c. Adding new paragraphs b6 and 7;
d. Revising the introductory text to paragraph c and paragraph c2;
e. Redesignating paragraphs c3 and 4 as c5 and 6; and f. Adding new paragraphs c3 and 4, and paragraph c7.
The revisions and additions 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
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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, 6th Floor, 950 LEnfant Plaza SW, Washington, DC 20024, 202 5861445, or go to: www.energy.gov/eere/
buildings/appliance-and-equipmentstandards-program, 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: fedreg.legal@
nara.gov, or go to: www.archives.gov/
federal-register/cfr/ibr-locations.html.
b AHRI. Air-Conditioning, Heating, and Refrigeration Institute, 2311 Wilson Blvd., Suite 400, Arlington, VA 22201, 703 5248800, or go to:
www.ahrinet.org.

6 AHRI Standard 9202020 IP, AHRI 9202020, 2020 Standard for Performance Rating of DX-Dedicated Outdoor Air System Units, approved February 4, 2020, IBR approved for appendix B to this subpart.
7 AHRI Standard 10602018, ANSI/AHRI 10602018, 2018
Standard for Performance Rating of Airto-Air Exchangers for Energy Recovery Ventilation Equipment, approved 2018, ANSI/AHRI 10602018, IBR
approved for appendix B to this subpart.
c ASHRAE. American Society of Heating, Refrigerating and AirConditioning Engineers, 180
Technology Parkway, Peachtree Corners, Georgia 30092, 404 6368400, or go to: www.ashrae.org.

2 ANSI/ASHRAE Standard 372009, ANSI/ASHRAE 37 or ANSI/
ASHRAE 372009, Methods of Testing for Rating Electrically Driven Unitary Air-Conditioning and Heat Pump Equipment, ASHRAE approved June 24, 2009, IBR approved for 431.96
and appendices A and B to this subpart.
3 ANSI/ASHRAE Standard 41.1
2013, ANSI/ASHRAE 41.12013, Standard Method for Temperature Measurement, ANSI approved January 30, 2013, IBR approved for appendix B
to this subpart.
4 ANSI/ASHRAE Standard 41.6
2014, ANSI/ASHRAE 41.62014, Standard Method for Humidity Measurement, ANSI approved July 3, 2014, IBR approved for appendix B to this subpart.

7 ANSI/ASHRAE Standard 198
2013, ANSI/ASHRAE 1982013,
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