ers shall be those measures of energy consumption which the Secretary of Energy determines are likely to assist consumers in making purchasing decisions and which are derived from the application of Appendix M to this subpart. (5) After September 12, 1988, all measures of energy consumption shall be determined by the test method as set forth in Appendix M to this subpart; or by an alternate rating method set forth in § 430.23(m)(4) as approved by the Assistant Secretary for Conservation and Renewable Energy in accordance with § 430.23(m)(5). (n) Furnaces. (1) The estimated annual operating cost for furnaces is the sum of: (i) The product of the average annual fuel energy consumption, in Btu's per year for gas or oil furnaces or in kilowatt-hours per year for electric furnaces, determined according to section 4.8 or 4.10 of Appendix N of this subpart, respectively, and the representative average unit cost in dollars per Btu for gas or oil, or dollars per kilowatt-hour for electric, as appropriate, as provided pursuant to section 323(b)(2) of the Act, plus (ii) the product of the average annual auxiliary electric energy consumption in kilowatt-hours per year determined according to section 4.9 of Appendix N of this subpart, and the representative average unit cost in dollars per kilowatt-hour as provided pursuant to section 323(b)(2) of the Act, the resulting sum then being rounded off to the nearest dollar per year. (For furnaces which operate with variable inputs, an estimated annual operating cost is to be calculated for each degree of oversizing specified in section 4 of Appendix N of this subpart.) (2) The annual fuel utilization efficiency for furnaces, expressed in percent, is the ratio of annual fuel output of useful energy delivered to the heated space to the annual fuel energy input to the furnace determined according to section 4.6 of Appendix N of this subpart for gas and oil furnaces and determined in accordance with section 4.1 of Appendix N of this subpart for electric furnaces. (3) The estimated regional annual operating cost for furnaces is the sum of: (i) The product of the regional annual fuel energy consumption in Btu's per year for gas or oil furnaces or in kilowatt-hours per year for electric furnaces, determined according to section 4.11 or 4.13 of Appendix N of this subpart, respectively, and the representative average unit cost in dollars per Btu for gas or oil, or dollars per kilowatt-hour for electric, as appropriate, as provided pursuant to section 323(b)(2) of the Act, plus (ii) the product of the regional annual auxiliary electrical energy consumption in kilowatt-hours per year, determined according to section 4.12 of Appendix N of this subpart, and the representative average unit cost in dollars per kilowatt-hour as provided pursuant to section 323(b)(2) of the Act, the resulting sum then being rounded off to the nearest dollar per year. (4) The energy factor for furnaces, expressed in percent, is the ratio of annual fuel output of useful energy delivered to the heated space to the total annual energy input to the furnace determined according to section 4.14 of Appendix N of this subpart. (5) Other useful measures of energy consumption for furnaces shall be those measures of energy consumption which the Secretary determines are likely to assist consumers in making purchasing decisions and which are derived from the application of Appendix N of this subpart. (0) Vented home heating equipment. (1) The annual fuel utilization efficiency for vented home heating equipment, expressed in percent, which is the ratio of the annual fuel output of useful energy delivered to the heated space to the annual fuel energy input to the vented heater, shall be determined either according to section 4.1.17 of Appendix O of this subpart for vented heaters without either manual controls or thermal stack dampers; according to section 4.2.6 of Appendix O of this subpart for vented heaters equipped with manual controls; or according to section 4.3.7 of Appendix O of this subpart for vented heaters equipped with thermal stack dampers. (2) The estimated operating cost per million Btu output for vented heaters without an auxiliary electric system shall be the product of: (i) One hun dred; (ii) the quotient of one million Btu output divided by the annual fuel utilization efficiency as determined in paragraph (o) (1) and (iii) the representative unit cost in dollars per Btu for natural gas, propane, or oil, as appropriate, as provided pursuant to section 323(b)(2) of the Act, the resulting product shall be rounded to the nearest 0.01 dollar per million Btu output. (3) The estimated operating cost per million Btu output for gas or oil vented home heating equipment with an auxiliary electric system shall be the product of: (A) The quotient of one million Btu divided by the sum of: (1) The product of the maximum fuel input in Btu's per hour as determined in 3.1.1 or 3.1.2 of Appendix 0 of this subpart times the annual fuel utilization efficiency in percent as determined in 4.1.17, 4.2.6, or 4.3.7 of this appendix as appropriate divided by 100, plus (2) the product of the maximum electric power in watts as determined in 3.1.3 of Appendix 0 of this subpart times the quantity 3.412; and (B) of the sum of: (1) the product of the maximum fuel input in Btu's per hour as determined in 3.1.1 of this appendix times the representative unit cost in dollars per Btu for natural gas, propane, or oil, as appropriate, as provided pursuant to section 323(b)(2) of the Act; plus (2) the product of the maximum auxiliary electric power in kilowatts as determined in 3.1.3 of Appendix O of this subpart times the representative unit cost in dollars per kilowatt-hour as provided pursuant to section 323(b)(2) of the Act, the resulting quantity shall be rounded off to the nearest 0.01 dollar per million Btu output. (4) Other useful measures of energy consumption for vented home heating equipment shall be those measures of energy consumption which the Secretary determines are likely to assist consumers in making purchasing decisions and which are derived from the application of Appendix O of this subpart. [42 FR 27898, June 1, 1977, as amended at 42 FR 39967, Aug. 8, 1977; 42 FR 49807, Sept. 28, 1977; 42 FR 54116, Oct. 4, 1977; 42 FR 55603, 55610, Oct. 18, 1977; 43 FR 20119, May 10, 1978; 43 FR 48986, Oct. 19, 1978; 47 FR 34524, Aug. 10, 1982; 48 FR 9206, Mar. 3, 1983; 49 FR 12156, Mar. 28, 1984; 52 FR 47550, Dec. 15, 1987; 53 FR 8311, Mar. 14, 1988] § 430.23 Units to be tested. When testing of a covered product is required to comply with section 323(c) of the Act or to comply with rules prescribed under section 324 of the Act, a sample shall be selected and tested comprised of units which are production units, or are representative of production units of the basic model being tested, and shall meet the following applicable criteria. (a)(1) For each basic model of electric refrigerators and electric refrigerator-freezers, a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 95 percent confidence limit of the true mean divided by 1.10, and (ii) Any represented value of the energy factor or other measure of energy consumption of a basic model for which consumer would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 95 percent confidence limit of the true mean divided by .90. (b)(1) For each basic model1 of freezers, a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 95 percent confidence limit of the true mean divided by 1.10, and (ii) Any represented value of the energy factor or other measure of energy consumption of a basic model for which consumers would favor 'Components of similar design may be substituted without requiring additional testing if the represented measures of energy consumption continue to satisfy the applicable sampling provision. higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 95 percent confidence limit of the true mean divided by .90. 1 (c)(1) For each basic model of dishwashers, a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 972 percent confidence limit of the true mean divided by 1.05, and (ii) Any represented value of the energy factor or other measure of energy consumption of a basic model for which consumers would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 971⁄2 percent confidence limit of the true mean divided by .95. (d)(1) For each basic model' of clothes dryers a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 97% percent confidence limit of the true mean divided by 1.05, and (ii) Any represented value of the energy factor or other measure of energy consumption of a basic model for which consumers would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 971⁄2 percent confidence limit of the true mean divided by .95. (e)(1) For each basic model 1 of water heaters, a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 95 percent confidence limit of the true mean divided by 1.10, and (ii) Any represented value of the energy factor or other measure of energy consumption of a basic model for which consumers would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 95 percent confidence limit of the true mean divided by .90. (f)(1) For each basic model of room air conditioners, a sample of sufficient size shall be tested to insure that— (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 971⁄2 percent confidence limit of the true mean divided by 1.05, and (ii) Any represented value of the energy efficiency ratio or other measure of energy consumption of a basic model for which consumers would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 971⁄2 percent confidence limit of the true mean divided by .95. (g)(1) For each basic model of unvented home heating equipment (not including furnaces), a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 972 percent confidence limit of the true mean divided by 1.075, and (ii) Any represented value of the annual fuel utilization efficiency or other measure of energy consumption of a basic model for which consumers would favor higher values shall be not greater than the lower of (A) the mean of the sample or (B) the lower 972 percent confidence limit of the true mean divided by .925. 1 (h)(1) For each basic model of television sets, a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 972 percent confidence limit of the true mean divided by 1.05, and (ii) Any represented value of the energy factor or other measure of energy consumption of a basic model for which consumers would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 97% percent confidence limit of the true mean divided by .95. (i)(1) Except as provided in paragraph (i)(2) of this section, for each basic model' of conventional cooking tops, conventional ovens and microwave ovens a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 97% percent confidence limit of the true mean divided by 1.05, and (ii) Any represented value of the energy factor or other measure of energy consumption of a basic model for which consumers would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 97% percent confidence limit of the true mean divided by .95. (2) Basic models need not be tested which differ from other tested basic models by only the design of oven doors the use of which leads to improved efficiency and decreased energy consumption and estimated annual operating cost. Any represented values of measures of energy con sumption for basic models not tested shall be the same as for the tested basic model. 1 (j)(1) For each basic model of clothes washers, a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 97% percent confidence limit of the true mean divided by 1.05, and (ii) Any represented value of the energy factor or other measure of energy consumption of a basic model for which consumers would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 971⁄2 percent confidence limit of the true mean divided by .95. 1 (k)(1) For each basic model of humidifiers, a sample of sufficient size shall be tested to insure that (1)(1) For each basic model of dehumidifier; a sample of sufficient size shall be tested to insure that (i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of a basic model for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 971⁄2 percent confidence limit of the true mean divided by 1.10, and (ii) Any represented value of the energy factor or other measure of energy consumption of a basic model for which consumers would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 971⁄2 percent confidence limit of the true mean divided by .90. (m)(1) For central air conditioners, each condensing unit shall have a condenser-evaporator coil combination selected and a sample of sufficient size tested in accordance with applicable provisions of this subpart such that(i) Any represented value of estimated annual operating cost, energy consumption or other measure of energy consumption of the condenser-evaporator coil combination for which consumers would favor lower values shall be no less than the higher of (A) the mean of the sample or (B) the upper 90 percent confidence limit of the true mean divided by 1.05, and (ii) Any represented value of the energy efficiency or other measure of energy consumption of the condenserevaporator coil combination for which consumers would favor higher values shall be no greater than the lower of (A) the mean of the sample or (B) the lower 90 percent confidence limit of the true mean divided by 0.95. (2) The condenser-evaporator coil combination selected for tests pursuant to paragraph (m)(1) of this section shall be that combination manufactured by the condensing unit manufacturer likely to have the largest volume of retail sales. Components of similar design may be substituted without requiring additional testing if the represented measures of energy consumption continue to satisfy the applicable sampling provisions of paragraphs (m)(1)(i) and (m)(1)(ii) of this section. For every other condenser-evaporator coil combination manufactured by the same manufacturer or in part by a component manufacturer using that same condensing unit, either (i) A sample of sufficient size, comprised of production units or representing production units, shall be tested to ensure that the requirements of paragraphs (m)(1)(i) and (m)(1)(ii) of this section are met for such other condenser-evaporator coil combinations; or (ii) The representative values of the measures of energy consumption shall be based on an alternative rating method that has been approved by DOE in accordance with the provisions of paragraphs (m)(4) and (m)(5) of this section. (3) Whenever the representative values of the measures of energy consumption, as determined by the provisions of paragraph (m)(2)(ii) of this section, do not agree within five percent of the representative values of the measures of energy consumption as determined by actual testing, the representative values determined by actual testing shall be used to comply with section 323(c) of the Act, or to comply with rules prescribed under section 324 of the Act. (4) The basis of the alternative rating method referred to in paragraph (m)(2)(ii) of this section shall be a representation of the test data and calculations of a mechanical vapor compression refrigeration cycle. The major components in the refrigeration cycle shall be modeled as "fits" to manufacturer performance data or by graphic or tabular performance data. Heat transfer characteristics of coils may be modeled as a function of face area, number of rows, fins per inch, refrigerant circuitry, air flow rate and entering air enthalpy. Additional performance-related characteristics to be considered may include type of expansion device, refrigerant flow rate through the expansion device, power of the indoor fan and degradation coefficient. (5) Manufacturers who elect to use an alternative rating method for determining measures of energy consumption under paragraphs (m)(2)(ii) and (m)(4) of this section must submit a request to DOE for reviewing the alternative rating method to the Assistant Secretary of Conservation and Renewable Energy, 1000 Independence Avenue, SW., Washington, DC 20585, and receive approval to use the alternative method by the Assistant Secretary before the alternative method may be used for rating central air conditioners. |