10 CFR 431.96 - Uniform test method for the measurement of energy efficiency of commercial air conditioners and heat pumps.

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§ 431.96 Uniform test method for the measurement of energy efficiency of commercial air conditioners and heat pumps.
(a) Scope. This section contains test procedures for measuring, pursuant to EPCA, the energy efficiency of any small, large, or very large commercial package air-conditioning and heating equipment, packaged terminal air conditioners and packaged terminal heat pumps, computer room air conditioners, variable refrigerant flow systems, and single package vertical air conditioners and single package vertical heat pumps.
(b) Testing and calculations.
(1) Determine the energy efficiency of each covered product by conducting the test procedure(s) listed in the rightmost column of Table 1 of this section, that apply to the energy efficiency descriptor for that product, category, and cooling capacity, until compliance with this test procedure version is no longer required per the date shown in the 5th most column from the left of Table 1 of this section.
Table 1 to § 431.96 —Test Procedures for Commercial Air Conditioners and Heat Pumps
Equipment type Category Coolingcapacity Energy efficiency descriptor Test procedure required forcompliance until Use tests, conditions, and procedures 1 in
1 Incorporated by reference, see § 431.95.
Small Commercial Packaged Air-Conditioning and Heating Equipment Air-Cooled, 3-Phase, AC and HPAir-Cooled AC and HP <65,000 Btu/h≥65,000 Btu/h and <135,000 Btu/h SEER and HSPFEER and COP May 13, 2013May 13, 2013 ARI 210/240-2003.ARI 340/360-2004.
Water-Cooled and Evaporatively-Cooled AC <65,000 Btu/h≥65,000 Btu/h and <135,000 Btu/h EEREER May 13, 2013May 13, 2013 ARI 210/240-2003.ARI 340/360-2004.
Water-Source HP <135,000 Btu/h EER and COP May 13, 2013 ISO Standard 13256-1 (1998).
Large Commercial Packaged Air-Conditioning and Heating Equipment Air-Cooled AC and HPWater-Cooled and Evaporatively-Cooled AC ≥135,000 Btu/h and <240,000 Btu/h≥135,000 Btu/h and <240,000 Btu/h EER and COPEER May 13, 2013May 13, 2013 ARI 340/360-2004.ARI 340/360-2004.
Very Large Commercial Packaged Air-Conditioning and Heating Equipment Air-Cooled AC and HPWater-Cooled and Evaporatively-Cooled AC ≥240,000 Btu/h and <760,000 Btu/h≥240,000 Btu/h and <760,000 Btu/h EER and COPEER May 13, 2013May 13, 2013 ARI 340/360-2004.ARI 340/360-2004.
Packaged Terminal Air Conditioners and Heat Pumps AC and HP <760,000 Btu/h EER and COP May 13, 2013 AHRI 310/380-2004.
(2) On or after the compliance dates listed in Table 2 of this section, determine the energy efficiency of each type of covered equipment by conducting the test procedure(s) listed in the rightmost column of Table 2 of this section along with any additional testing provisions set forth in paragraphs (c), (d), and (e) of this section, that apply to the energy efficiency descriptor for that equipment, category, and cooling capacity. Note, the omitted sections of the test procedures listed in the rightmost column of Table 1 of this section shall not be used.
Table 2 to § 431.96 —Test Procedures for Commercial Air Conditioners and Heat Pumps
Equipment type Category Cooling capacity Energy efficiency descriptor Compliance with test procedurerequired on or after Use tests, conditions, andprocedures 1 in
1 Incorporated by reference, see § 431.95.
Small Commercial Packaged Air-Conditioning and Heating Equipment Air-Cooled, 3-Phase, AC and HPAir-Cooled AC and HP <65,000 Btu/h≥65,000 Btu/h and <135,000 Btu/h SEER and HSPFEER and COP May 13, 2013May 13, 2013 AHRI 210/240-2008 (omit section 6.5).AHRI 340/360-2007 (omit section 6.3).
Water-Cooled and Evaporatively-Cooled AC <65,000 Btu/h≥65,000 Btu/h and <135,000 Btu/h EEREER May 13, 2013May 13, 2013 AHRI 210/240-2008 (omit section 6.5).AHRI 340/360-2007 (omit section 6.3).
Water-Source HP <135,000 Btu/h EER and COP May 13, 2013 ISO Standard 13256-1 (1998).
Large Commercial Packaged Air-Conditioning and Heating Equipment Air-Cooled AC and HPWater-Cooled and Evaporatively-Cooled AC ≥135,000 Btu/h and <240,000 Btu/h≥135,000 Btu/h and <240,000 Btu/h EER and COPEER May 13, 2013May 13, 2013 AHRI 340/360-2007 (omit section 6.3).AHRI 340/360-2007 (omit section 6.3).
Very Large Commercial Packaged Air-Conditioning and Heating Equipment Air-Cooled AC and HPWater-Cooled and Evaporatively-Cooled AC ≥240,000 Btu/h and <760,000 Btu/h≥240,000 Btu/h and <760,000 Btu/h EER and COPEER May 13, 2013May 13, 2013 AHRI 340/360-2007 (omit section 6.3).AHRI 340/360-2007 (omit section 6.3).
Packaged Terminal Air Conditioners and Heat Pumps AC and HP <760,000 Btu/h EER and COP May 13, 2013 AHRI 310/380-2004 (omit section 5.6).
Computer Room Air Conditioners AC <65,000 Btu/h<65,000 Btu/h and <760,000 Btu/h SCOPSCOP October 29, 2012May 13, 2013 ASHRAE 127-2007 (omit section 5.11).ASHRAE 127-2007 (omit section 5.11).
Variable Refrigerant Flow Multi-split Systems AC <760,000 Btu/h EER and COP May 13, 2013 AHRI 1230-2010 (omit sections 5.1.2 and 6.6).
Variable Refrigerant Flow Multi-split Systems, Air-cooled HP <760,000 Btu/h EER and COP May 13, 2013 AHRI 1230-2010 (omit sections 5.1.2 and 6.6).
Variable Refrigerant Flow Multi-split Systems, Water-source HP <17,000 Btu/h EER and COP October 29, 2012 AHRI 1230-2010 (omit sections 5.1.2 and 6.6).
Variable Refrigerant Flow Multi-split Systems, Water-source HP ≥17,000 Btu/h and <760,000 Btu/h EER and COP May 13, 2013 AHRI 1230-2010 (omit sections 5.1.2 and 6.6).
Single Package Vertical Air Conditioners and Single Package Vertical Heat Pumps AC and HP <760,000 Btu/h EER and COP July 16, 2012 AHRI 390-2003 (omit section 6.4).
(c) Optional break-in period for tests conducted using AHRI 210/240-2008, AHRI 340/360-2007, AHRI 390-2003, AHRI 1230-2010, and ASHRAE 127-2007. Manufacturers may optionally specify a “break-in” period, not to exceed 20 hours, to operate the equipment under test prior to conducting the test method specified by AHRI 210/240-2008, AHRI 340/360-2007, AHRI 390-2003, AHRI 1230-2010, or ASHRAE 127-2007 (incorporated by reference, see § 431.95). A manufacturer who elects to use an optional compressor break-in period in its certification testing should record this information (including the duration) in the test data underlying the certified ratings that is required to be maintained under 10 CFR 429.71.
(d) Refrigerant line length corrections for tests conducted using AHRI 1230-2010. For test setups where it is physically impossible for the laboratory to use the required line length listed in Table 3 of the AHRI 1230-2010 (incorporated by reference, see § 431.95), then the actual refrigerant line length used by the laboratory may exceed the required length and the following correction factors are applied:
Piping length beyond minimum, X(ft) Piping length beyond minimum, Y(m) Cooling capacity correction%
0>X ≤20 0>Y ≤6.1 1
20>X ≤40 6.1>Y ≤12.2 2
40>X ≤60 12.2>Y ≤18.3 3
60>X ≤80 18.3>Y ≤24.4 4
80>X ≤100 24.4>Y ≤30.5 5
100 >X ≤120 30.5>Y ≤36.6 6
(e) Additional provisions for equipment set-up. The only additional specifications that may be used in setting up the basic model for test are those set forth in the installation and operation manual shipped with the unit. Each unit should be set up for test in accordance with the manufacturer installation and operation manuals. Paragraphs (e)(1) through (3) of this section provide specifications for addressing key information typically found in the installation and operation manuals.
(1) If a manufacturer specifies a range of superheat, sub-cooling, and/or refrigerant pressure in its installation and operation manual for a given basic model, any value(s) within that range may be used to determine refrigerant charge or mass of refrigerant, unless the manufacturer clearly specifies a rating value in its installation and operation manual, in which case the specified rating value shall be used.
(2) The air flow rate used for testing must be that set forth in the installation and operation manuals being shipped to the commercial customer with the basic model and clearly identified as that used to generate the DOE performance ratings. If a rated air flow value for testing is not clearly identified, a value of 400 standard cubic feet per minute (scfm) per ton shall be used.
(3) For VRF systems, the test set-up and the fixed compressor speeds (i.e., the maximum, minimum, and any intermediate speeds used for testing) should be recorded and maintained as part of the test data underlying the certified ratings that is required to be maintained under 10 CFR 429.71.
(f) Manufacturer involvement in assessment or enforcement testing for variable refrigerant flow systems. A manufacturer's representative will be allowed to witness assessment and/or enforcement testing for VRF systems. The manufacturer's representative will be allowed to inspect and discuss set-up only with a DOE representative and adjust only the modulating components during testing in the presence of a DOE representative that are necessary to achieve steady-state operation. Only previously documented specifications for set-up as specified under paragraphs (d) and (e) of this section will be used.
[77 FR 28989, May 16, 2012]
Beta! The text on the eCFR tab represents the unofficial eCFR text at ecfr.gov.
§ 431.96 Uniform test method for the measurement of energy efficiency of commercial air conditioners and heat pumps.
Link to an amendment published at 80 FR 79669, Dec. 23, 2015.

(a) Scope. This section contains test procedures for measuring, pursuant to EPCA, the energy efficiency of any small, large, or very large commercial package air-conditioning and heating equipment, packaged terminal air conditioners and packaged terminal heat pumps, computer room air conditioners, variable refrigerant flow systems, and single package vertical air conditioners and single package vertical heat pumps.

(b) Testing and calculations.

(1) Determine the energy efficiency of each type of covered equipment by conducting the test procedure(s) listed in the fifth column of Table 1 of this section along with any additional testing provisions set forth in paragraphs (c) through (g) of this section, that apply to the energy efficiency descriptor for that equipment, category, and cooling capacity. The omitted sections of the test procedures listed in the fifth column of Table 1 of this section shall not be used.

(2) After June 24, 2016, any representations made with respect to the energy use or efficiency of packaged terminal air conditioners and heat pumps (PTACs and PTHPs) must be made in accordance with the results of testing pursuant to this section. Manufacturers conducting tests of PTACs and PTHPs after July 30, 2015 and prior to June 24, 2016, must conduct such test in accordance with either table 1 to this section or § 431.96 as it appeared at 10 CFR part 431, subpart F, in the 10 CFR parts 200 to 499 edition revised as of January 1, 2014. Any representations made with respect to the energy use or efficiency of such packaged terminal air conditioners and heat pumps must be in accordance with whichever version is selected.

Table 1 to § 431.96 - Test Procedures for Commercial Air Conditioners and Heat Pumps

Equipment type Category Cooling capacity Energy efficiency descriptor Use tests, conditions, and procedures 1 in Additional test procedure provisions as indicated in the listed paragraphs of this section
Small Commercial Packaged Air-Conditioning and Heating Equipment Air-Cooled, 3-Phase, AC and HP <65,000 Btu/h SEER and HSPF AHRI 210/240-2008 (omit section 6.5) Paragraphs (c) and (e).
Air-Cooled AC and HP ≥65,000 Btu/h and <135,000 Btu/h EER and COP AHRI 340/360-2007 (omit section 6.3) Paragraphs (c) and (e).
Water-Cooled and Evaporatively-Cooled AC <65,000 Btu/h EER AHRI 210/240-2008 (omit section 6.5) Paragraphs (c) and (e).
≥65,000 Btu/h and <135,000 Btu/h EER AHRI 340/360-2007 (omit section 6.3) Paragraphs (c) and (e).
Water-Source HP <135,000 Btu/h EER and COP ISO Standard 13256-1 (1998) Paragraph (e).
Large Commercial Packaged Air-Conditioning and Heating Equipment Air-Cooled AC and HP ≥135,000 Btu/h and <240,000 Btu/h EER and COP AHRI 340/360-2007 (omit section 6.3) Paragraphs (c) and (e).
Water-Cooled and Evaporatively-Cooled AC ≥135,000 Btu/h and <240,000 Btu/h EER AHRI 340/360-2007 (omit section 6.3) Paragraphs (c) and (e).
Very Large Commercial Packaged Air-Conditioning and Heating Equipment Air-Cooled AC and HP ≥240,000 Btu/h and <760,000 Btu/h EER and COP AHRI 340/360-2007 (omit section 6.3) Paragraphs (c) and (e).
Water-Cooled and Evaporatively-Cooled AC ≥240,000 Btu/h and <760,000 Btu/h EER AHRI 340/360-2007 (omit section 6.3). Paragraphs (c) and (e).
Packaged Terminal Air Conditioners and Heat Pumps AC and HP <760,000 Btu/h EER and COP See paragraph (g) of this section Paragraphs (c), (e), and (g).
Computer Room Air Conditioners AC <65,000 Btu/h SCOP ASHRAE 127-2007 (omit section 5.11) Paragraphs (c) and (e).
≥65,000 Btu/h and <760,000 Btu/h SCOP ASHRAE 127-2007 (omit section 5.11) Paragraphs (c) and (e).
Variable Refrigerant Flow Multi-split Systems AC <760,000 Btu/h EER and COP AHRI 1230-2010 (omit sections 5.1.2 and 6.6) Paragraphs (c), (d), (e), and (f).
Variable Refrigerant Flow Multi-split Systems, Air-cooled HP <760,000 Btu/h EER and COP AHRI 1230-2010 (omit sections 5.1.2 and 6.6) Paragraphs (c), (d), (e), and (f).
Variable Refrigerant Flow Multi-split Systems, Water-source HP <17,000 Btu/h EER and COP AHRI 1230-2010 (omit sections 5.1.2 and 6.6) Paragraphs (c), (d), (e), and (f).
Variable Refrigerant Flow Multi-split Systems, Water-source HP ≥17,000 Btu/h and <760,000 Btu/h EER and COP AHRI 1230-2010 (omit sections 5.1.2 and 6.6) Paragraphs (c), (d), (e), and (f).
Single Package Vertical Air Conditioners and Single Package Vertical Heat Pumps AC and HP <760,000 Btu/h EER and COP AHRI 390-2003 (omit section 6.4) Paragraphs (c) and (e).

1 Incorporated by reference, see § 431.95.

(c) Optional break-in period. Manufacturers may optionally specify a “break-in” period, not to exceed 20 hours, to operate the equipment under test prior to conducting the test method specified by AHRI 210/240-2008, AHRI 310/380-2014, AHRI 340/360-2007, AHRI 390-2003, AHRI 1230-2010, or ASHRAE 127-2007 (incorporated by reference, see § 431.95). A manufacturer who elects to use an optional break-in period in its certification testing should record this information (including the duration) in the test data underlying the certified ratings that is required to be maintained under 10 CFR 429.71.

(d) Refrigerant line length corrections for tests conducted using AHRI 1230-2010. For test setups where it is physically impossible for the laboratory to use the required line length listed in Table 3 of the AHRI 1230-2010 (incorporated by reference, see § 431.95), then the actual refrigerant line length used by the laboratory may exceed the required length and the following correction factors are applied:

Piping length beyond minimum, X
(ft)
Piping length beyond minimum, Y
(m)
Cooling capacity correction
%
0>X ≤20 0>Y ≤6.1 1
20>X ≤40 6.1>Y ≤12.2 2
40>X ≤60 12.2>Y ≤18.3 3
60>X ≤80 18.3>Y ≤24.4 4
80>X ≤100 24.4>Y ≤30.5 5
100 >X ≤120 30.5>Y ≤36.6 6

(e) Additional provisions for equipment set-up. The only additional specifications that may be used in setting up the basic model for test are those set forth in the installation and operation manual shipped with the unit. Each unit should be set up for test in accordance with the manufacturer installation and operation manuals. Paragraphs (e)(1) through (3) of this section provide specifications for addressing key information typically found in the installation and operation manuals.

(1) If a manufacturer specifies a range of superheat, sub-cooling, and/or refrigerant pressure in its installation and operation manual for a given basic model, any value(s) within that range may be used to determine refrigerant charge or mass of refrigerant, unless the manufacturer clearly specifies a rating value in its installation and operation manual, in which case the specified rating value shall be used.

(2) The air flow rate used for testing must be that set forth in the installation and operation manuals being shipped to the commercial customer with the basic model and clearly identified as that used to generate the DOE performance ratings. If a rated air flow value for testing is not clearly identified, a value of 400 standard cubic feet per minute (scfm) per ton shall be used.

(3) For VRF systems, the test set-up and the fixed compressor speeds (i.e., the maximum, minimum, and any intermediate speeds used for testing) should be recorded and maintained as part of the test data underlying the certified ratings that is required to be maintained under 10 CFR 429.71.

(f) Manufacturer involvement in assessment or enforcement testing for variable refrigerant flow systems. A manufacturer's representative will be allowed to witness assessment and/or enforcement testing for VRF systems. The manufacturer's representative will be allowed to inspect and discuss set-up only with a DOE representative and adjust only the modulating components during testing in the presence of a DOE representative that are necessary to achieve steady-state operation. Only previously documented specifications for set-up as specified under paragraphs (d) and (e) of this section will be used.

(g) Test Procedures for Packaged Terminal Air Conditioners and Packaged Terminal Heat Pumps -

(1) Cooling mode testing. The test method for testing packaged terminal air conditioners and packaged terminal heat pumps in cooling mode shall consist of application of the methods and conditions in AHRI 310/380-2014 sections 3, 4.1, 4.2, 4.3, and 4.4 (incorporated by reference; see § 431.95), and in ANSI/ASHRAE 16 (incorporated by reference; see § 431.95) or ANSI/ASHRAE 37 (incorporated by reference; see § 431.95), except that instruments used for measuring electricity input shall be accurate to within ±0.5 percent of the quantity measured. Where definitions provided in AHRI 310/380-2014, ANSI/ASHRAE 16, and/or ANSI/ASHRAE 37 conflict with the definitions provided in 10 CFR 431.92, the 10 CFR 431.92 definitions shall be used. Where AHRI 310/380-2014 makes reference to ANSI/ASHRAE 16, it is interpreted as reference to ANSI/ASHRAE 16-1983 (RA 2014).

(2) Heating mode testing. The test method for testing packaged terminal heat pumps in heating mode shall consist of application of the methods and conditions in AHRI 310/380-2014 sections 3, 4.1, 4.2 (except the section 4.2.1.2(b) reference to ANSI/ASHRAE 37), 4.3, and 4.4 (incorporated by reference; see § 431.95), and in ANSI/ASHRAE 58 (incorporated by reference; see § 431.95). Where definitions provided in AHRI 310/380-2014 or ANSI/ASHRAE 58 conflict with the definitions provided in 10 CFR 431.92, the 10 CFR 431.92 definitions shall be used. Where AHRI 310/380-2014 makes reference to ANSI/ASHRAE 58, it is interpreted as reference to ANSI/ASHRAE 58-1986 (RA 2014).

(3) Wall sleeves. For packaged terminal air conditioners and packaged terminal heat pumps, the unit must be installed in a wall sleeve with a 14 inch depth if available. If a 14 inch deep wall sleeve is not available, use the available wall sleeve option closest to 14 inches in depth. The area(s) between the wall sleeve and the insulated partition between the indoor and outdoor rooms must be sealed to eliminate all air leakage through this area.

(4) Optional pre-filling of the condensate drain pan. For packaged terminal air conditioners and packaged terminal heat pumps, test facilities may add water to the condensate drain pan of the equipment under test (until the water drains out due to overflow devices or until the pan is full) prior to conducting the test method specified by AHRI 310/380-2014 (incorporated by reference, see § 431.95). No specific level of water mineral content or water temperature is required for the water added to the condensate drain pan.

(5) Filter selection. For packaged terminal air conditioners and packaged terminal heat pumps, the indoor filter used during testing shall be the standard or default filter option shipped with the model. If a particular model is shipped without a filter, the unit must be tested with a MERV-1 filter sized appropriately for the filter slot.

[77 FR 28989, May 16, 2012; 80 FR 11857, Mar. 5, 2015, as amended at 80 FR 37148, June 30, 2015]

Title 10 published on 2015-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 10 CFR Part 431 after this date.

  • 2015-12-09; vol. 80 # 236 - Wednesday, December 9, 2015
    1. 80 FR 76355 - Energy Conservation Program: Energy Conservation Standards for High-Intensity Discharge Lamps
      GPO FDSys XML | Text
      DEPARTMENT OF ENERGY, Office of Energy Efficiency and Renewable Energy
      Final determination.
      This final determination is effective December 9, 2015.
      10 CFR Part 431