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Electronic Code of Federal Regulations

e-CFR data is current as of February 20, 2020

Title 10Chapter IISubchapter DPart 429Subpart C → Appendix


Title 10: Energy
PART 429—CERTIFICATION, COMPLIANCE, AND ENFORCEMENT FOR CONSUMER PRODUCTS AND COMMERCIAL AND INDUSTRIAL EQUIPMENT
Subpart C—Enforcement


Appendix B to Subpart C of Part 429—Sampling Plan for Enforcement Testing of Covered Equipment and Certain Low-Volume Covered Products

The Department will determine compliance as follows:

(a) The first sample size (n1) must be four or more units, except as provided by §429.57(e)(1)(ii).

(b) Compute the mean of the measured energy performance (x1) for all tests as follows:

eCFR graphic er07mr11.145.gif

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where xi is the measured energy efficiency or consumption from test i, and n1 is the total number of tests.

(c) Compute the standard deviation (s1) of the measured energy performance from the n1 tests as follows:

eCFR graphic er07mr11.146.gif

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(d) Compute the standard error (sx1) of the measured energy performance from the n1 tests as follows:

eCFR graphic er07mr11.147.gif

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(e)(1) For an energy efficiency standard (EES), determine the appropriate lower control limit (LCL1) according to:

eCFR graphic er07mr11.148.gif

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And use whichever is greater. Where EES is the energy efficiency standard and t is a statistic based on a 97.5 percent, one-sided confidence limit and a sample size of n1.

(2) For an energy consumption standard (ECS), determine the appropriate upper control limit (UCL1) according to:

eCFR graphic er07mr11.149.gif

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And use whichever is less, where ECS is the energy consumption standard and t is a statistic based on a 97.5 percent, one-sided confidence limit and a sample size of n1.

(f)(1) Compare the sample mean to the control limit.

(i) The basic model is in compliance and testing is at an end if:

(A) For an energy or water efficiency standard, the sample mean is equal to or greater than the lower control limit, or

(B) For an energy or water consumption standard, the sample mean is equal to or less than the upper control limit.

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