10 CFR 429.44 - Commercial water heating equipment.

§ 429.44 Commercial water heating equipment. Link to an amendment published at 79 FR 40565, July 11, 2014.
(a) Determination of represented value. Manufacturers must determine the represented value, which includes the certified rating, for each basic model of commercial water heating equipment, either by testing, in conjunction with the applicable sampling provisions, or by applying an AEDM.
(1) Units to be tested.
(i) If the represented value for a given basic model is determined through testing, the general requirements of§ 429.11 are applicable; and
(ii) For each basic model selected for testing, a sample of sufficient size shall be randomly selected and tested to ensurethat—
(A) Any represented value of energy consumption or other measure of energy use of a basic model for which consumers would favor lower values shall be greater than or equal to the higher of:
(1) The mean of the sample, where:
And, x is the sample mean; n is the number of samples; and xi is the ith sample; or,
(2) The upper 95 percent confidence limit (UCL) of the truemean divided by 1.05, where:
And x is the sample mean; s is the sample standard deviation; n is the number of samples; and t0.95 is the t statistic for a 95% one-tailed confidence interval with n-1 degrees of freedom (from Appendix A to subpart B of part 429). And,
(B) Any represented value of energy efficiency or other measure of energy consumption of a basic model for which consumers would favor higher values shall be less than or equal to the lower of:
(1) The mean of the sample, where:
And, x is the sample mean; n is the number of samples; and xi is the ith sample; or,
(2) The lower 95 percent confidence limit (LCL) of the truemean divided by 0.95, where:
And x is the sample mean; s is the sample standard deviation; n is the number of samples; and t0.95 is the t statistic for a 95% one-tailed confidence interval with n-1 degrees of freedom (from Appendix A to subpart B of part 429).
(2) Alternative efficiency determination methods. In lieu of testing, a represented value of efficiency or consumption for a basic model of commercial water heating equipment must be determined through the application of an AEDM pursuant to the requirements of § 429.70 and the provisions of this section, where:
(i) Any represented value of energy consumption or other measure of energy use of a basic model for which consumers would favor lower values shall be greater than or equal to the output of the AEDM and less than or equal to the Federal standard for that basic model; and
(ii) Any represented value of energy efficiency or other measure of energy consumption of a basic model for which consumers would favor higher values shall be less than or equal to the output of the AEDM and greater than or equal to the Federal standard for that basic model.
(b) Certification reports.
(1) The requirements of§ 429.12 are applicable to commercial WH equipment; and
(2) Pursuant to§ 429.12(b)(13), a certification report must include the following public equipment-specific information:
(i) Commercial electric storage water heaters: The maximum standby loss in percent per hour (%/hr) and the measured storage volume in gallons (gal).
(ii) Commercial gas-fired and oil-fired storage water heaters: The thermal efficiency in percent (%), the maximum standby loss in British thermal units per hour (Btu/h), the rated storage volume in gallons (gal), and the nameplate input rate in British thermal units per hour (Btu/h).
(iii) Commercial water heaters and hot water supply boilers with storage capacity greater than 140 gallons: The thermal efficiency in percent (%), whether the storage volume is greater than 140 gallons (Yes/No); whether thetank surface area is insulated with at least R-12.5 (Yes/No); whether a standing pilot light is used (Yes/No); for gas or oil-fired water heaters, whether the basic model has a fire damper or fan assisted combustion (Yes/No); and, if applicable, pursuant to 10 CFR 431.110, the maximum standby loss in British thermal units per hour (Btu/h) and measured storage volume in gallons (gal).
(iv) Commercial gas-fired and oil-fired instantaneous water heaters greater than or equal to 10 gallons and gas-fired and oil-fired hot water supply boilers greater than or equal to 10 gallons: The thermal efficiency in percent (%), the maximum standby loss in British thermal units per hour (Btu/h), the rated storage volume in gallons (gal), and the nameplate input rate in Btu/h.
(v) Commercial gas-fired and oil-fired instantaneous water heaters less than 10 gallons and gas-fired and oil-fired hot water supply boilers less than 10 gallons: The thermal efficiency in percent (%) and the rated storage volume in gallons (g).
(vi) Commercial unfired hot water storage tanks: The thermal insulation (i.e., R-value) and stored volume in gallons (gal).
(3) Pursuant to§ 429.12(b)(13), a certification report must include the following additional, equipment-specific information:
(i) Whether the basic model is engineered-to-order; and
(ii) For any basic model rated with an AEDM, whether the manufacturer elects the witness test option for verification testing. (See§ 429.70(c)(5)(iii) for options). However, the manufacturer may not select more than 10% of AEDM-rated basic models to be eligible for witness testing.
(4) Pursuant to§ 429.12(b)(13), a certification report may include supplemental testing instructions in PDF format. A manufacturer may also include with a certification report other supplementary items in PDF format (e.g., manuals) for DOE consideration in performing testing under subpart C of this part.
(c) Alternative methods for determining efficiency or energy use for commercial WH equipment can be found in§ 429.70 of this subpart.
[76 FR 12451, Mar. 7, 2011; 76 FR 24776, May 2, 2011, as amended at 78 FR 79594, Dec. 31, 2013; 79 FR 25504, May 5, 2014]
Effective Date Note:
At 79 FR 40565, July 11, 2014, § 429.44 was amended by redesignating paragraphs (a), (b), and (c) as (b), (c), and (d), respectively; adding new paragraph (a); and revising newly redesignated paragraph (b), effective July 13, 2015. For the convenience of the user, the added and revised text is set forth as follows:
§ 429.44 Commercial water heating equipment.
(a) For residential-duty commercial water heaters, all represented values must be determined in accordance with§ 429.17.
(b) Determination of Represented Value for All Types of Commercial Water Heaters Except Residential-Duty Commercial Water Heaters. Manufacturers must determine the represented value, which includes the certified rating, for each basic model of commercial water heating equipment except residential-duty commercial water heaters, either by testing, in conjunction with the applicable sampling provisions, or by applying an AEDM as set forth in § 429.70.
Beta! The text on the eCFR tab represents the unofficial eCFR text at ecfr.gov.
§ 429.44 Commercial water heating equipment.

(a) For residential-duty commercial water heaters, all represented values must be determined in accordance with § 429.17.

(b) Determination of Represented Value for All Types of Commercial Water Heaters Except Residential-Duty Commercial Water Heaters. Manufacturers must determine the represented value, which includes the certified rating, for each basic model of commercial water heating equipment except residential-duty commercial water heaters, either by testing, in conjunction with the applicable sampling provisions, or by applying an AEDM as set forth in § 429.70.

(c) Certification reports.

(1) The requirements of § 429.12 are applicable to commercial WH equipment; and

(2) Pursuant to § 429.12(b)(13), a certification report must include the following public equipment-specific information:

(i) Commercial electric storage water heaters: The maximum standby loss in percent per hour (%/hr) and the measured storage volume in gallons (gal).

(ii) Commercial gas-fired and oil-fired storage water heaters: The thermal efficiency in percent (%), the maximum standby loss in British thermal units per hour (Btu/h), the rated storage volume in gallons (gal), and the nameplate input rate in British thermal units per hour (Btu/h).

(iii) Commercial water heaters and hot water supply boilers with storage capacity greater than 140 gallons: The thermal efficiency in percent (%), whether the storage volume is greater than 140 gallons (Yes/No); whether the tank surface area is insulated with at least R-12.5 (Yes/No); whether a standing pilot light is used (Yes/No); for gas or oil-fired water heaters, whether the basic model has a fire damper or fan assisted combustion (Yes/No); and, if applicable, pursuant to 10 CFR 431.110, the maximum standby loss in British thermal units per hour (Btu/h) and measured storage volume in gallons (gal).

(iv) Commercial gas-fired and oil-fired instantaneous water heaters greater than or equal to 10 gallons and gas-fired and oil-fired hot water supply boilers greater than or equal to 10 gallons: The thermal efficiency in percent (%), the maximum standby loss in British thermal units per hour (Btu/h), the rated storage volume in gallons (gal), and the nameplate input rate in Btu/h.

(v) Commercial gas-fired and oil-fired instantaneous water heaters less than 10 gallons and gas-fired and oil-fired hot water supply boilers less than 10 gallons: The thermal efficiency in percent (%) and the rated storage volume in gallons (g).

(vi) Commercial unfired hot water storage tanks: The thermal insulation (i.e., R-value) and stored volume in gallons (gal).

(3) Pursuant to § 429.12(b)(13), a certification report must include the following additional, equipment-specific information:

(i) Whether the basic model is engineered-to-order; and

(ii) For any basic model rated with an AEDM, whether the manufacturer elects the witness test option for verification testing. (See § 429.70(c)(5)(iii) for options). However, the manufacturer may not select more than 10% of AEDM-rated basic models to be eligible for witness testing.

(4) Pursuant to § 429.12(b)(13), a certification report may include supplemental testing instructions in PDF format. If necessary to run a valid test, the equipment-specific, supplemental information must include any additional testing and testing set up instructions (e.g., whether a bypass loop was used for testing) for the basic model and all other information (e.g., operational codes or overrides for the control settings) necessary to operate the basic model under the required conditions specified by the relevant test procedure. A manufacturer may also include with a certification report other supplementary items in PDF format (e.g., manuals) for DOE consideration in performing testing under subpart C of this part.

(d) Alternative methods for determining efficiency or energy use for commercial WH equipment can be found in § 429.70 of this subpart.

[76 FR 12451, Mar. 7, 2011; 76 FR 24776, May 2, 2011, as amended at 78 FR 79594, Dec. 31, 2013; 79 FR 25504, May 5, 2014; 80 FR 151, Jan. 5, 2015; 79 FR 40565, July 11, 2014]

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 429 after this date.

  • 2015-11-27; vol. 80 # 228 - Friday, November 27, 2015
    1. 80 FR 74020 - Energy Conservation Program: Test Procedures for Portable Air Conditioners
      GPO FDSys XML | Text
      DEPARTMENT OF ENERGY, 10 CFR Parts 429 and 430
      Supplemental notice of proposed rulemaking.
      DOE will accept comments, data, and information regarding this SNOPR, submitted no later than December 28, 2015. See section V, “Public Participation,” for details.
      10 CFR Part 429