Sampling plan for selection of units for testing. (1) The requirements of § 429.11 are applicable to furnace fans; and
For each basic model of furnace fan within the scope of appendix AA of subpart B of part 430, a sample of sufficient size shall be randomly selected and tested to ensure that any represented value of fan energy rating (FER), rounded to the nearest integer, shall be greater than or equal to the higher of:
The mean of the sample, where:
And, x is the sample mean; n is the number of samples; and x i is the measured value for the ith sample; Or,
The upper 90 percent confidence limit (UCL) of the true mean divided by 1.05, where:
And x is the sample mean; s is the sample standard deviation; n is the number of samples; and t 0.90 is the t statistic for a 90% one-tailed confidence interval with n-1 degrees of freedom (from Appendix A).
Certification reports. (1) The requirements of § 429.12 are applicable to residential furnace fans; and
Pursuant to § 429.12(b)(13), a certification report shall include the following public product-specific information: The fan energy rating (FER) in watts per thousand cubic feet per minute (W/1000 cfm); the calculated maximum airflow at the reference system external static pressure (ESP) in cubic feet per minute (cfm); the control system configuration for achieving the heating and constant-circulation airflow-control settings required for determining FER as specified in the furnace fan test procedure (10 CFR part 430, subpart B, appendix AA); the measured steady-state gas, oil, or electric heat input rate (QIN) in the heating setting required for determining FER; and for modular blowers, the manufacturer and model number of the electric heat resistance kit with which it is equipped for certification testing.
Copyright ©2024 LegalFix. All rights reserved. LegalFix is not a law firm, is not licensed to practice law, and does not provide legal advice, services, or representation. The information on this website is an overview of the legal plans you can purchase—or that may be provided by your employer as an employee benefit or by your credit union or other membership group as a membership benefit.
LegalFix provides its members with easy access to affordable legal services through a network of independent law firms. LegalFix, its corporate entity, and its officers, directors, employees, agents, and contractors do not provide legal advice, services, or representation—directly or indirectly.
The articles and information on the site are not legal advice and should not be relied upon—they are for information purposes only. You should become a LegalFix member to get legal services from one of our network law firms.
You should not disclose confidential or potentially incriminating information to LegalFix—you should only communicate such information to your network law firm.
The benefits and legal services described in the LegalFix legal plans are not always available in all states or with all plans. See the legal plan Benefit Overview and the more comprehensive legal plan contract during checkout for coverage details in your state.
Use of this website, the purchase of legal plans, and access to the LegalFix networks of law firms are subject to the LegalFix Terms of Service and Privacy Policy.