(a) Determination of represented value. Manufacturers must determine the represented value, which includes the certified rating, for each basic model of commercial packaged boilers 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 is determined through testing, the general requirements of Sec. 429.11 are applicable; and
(i) If the represented value is determined through testing, the general requirements of Sec. 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 ensure that--
(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:
[GRAPHIC] [TIFF OMITTED] TR05MY14.004
and, xx is the sample mean; n is the number of samples; and xi is the i\th\ sample; Or,
(2) The upper 95 percent confidence limit (UCL) of the true mean divided by 1.05, where:[GRAPHIC] [TIFF OMITTED] TR05MY14.005 And xx 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:
[GRAPHIC] [TIFF OMITTED] TR05MY14.006
and, xx is the sample mean; n is the number of samples; and xi is the i\th\ sample; Or,
(2) The lower 95 percent confidence limit (LCL) of the true mean divided by 0.95, where: [GRAPHIC] [TIFF OMITTED] TR05MY14.007 And xx 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 packaged boiler must be determined through the application of an AEDM pursuant to the requirements of Sec. 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 Sec. 429.12 are applicable to commercial packaged boilers; and
(1) The requirements of Sec. 429.12 are applicable to commercial packaged boilers; and
(2) Pursuant to Sec. 429.12(b)(13), a certification report must include the following public equipment-specific information: The combustion efficiency in percent (%) or the thermal efficiency in percent (%), as required in Sec. 431.87 of this chapter; and the maximum rated input capacity in British thermal units per hour (Btu/h).
(3) Pursuant to Sec. 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 Sec. 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 Sec. 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 packaged boilers can be found in Sec. 429.70. [79 FR 25504, May 5, 2014]