[Code of Federal Regulations]
[Title 10, Volume 3]
[Revised as of January 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR430.23]

[Page 127-140]
 
                            TITLE 10--ENERGY
 
                    CHAPTER II--DEPARTMENT OF ENERGY
 
PART 430_ENERGY CONSERVATION PROGRAM FOR CONSUMER PRODUCTS--Table of 
Contents
 
                        Subpart B_Test Procedures
 
Sec. 430.23  Test procedures for the measurement of energy and water 
consumption.

    (a) Refrigerators and refrigerator-freezers. (1) The estimated 
annual operating cost for electric refrigerators and electric 
refrigerator-freezers without an anti-sweat heater switch shall be the 
product of the following three factors: (i) The representative average-
use cycle of 365 cycles per year, (ii) the average per-cycle energy 
consumption for the standard cycle in kilowatt-hours per cycle, 
determined according to 6.2 (6.3.6 for externally vented units) of 
appendix A1 of this subpart, and (iii) the representative average unit 
cost of electricity in dollars per kilowatt-hour as provided by the 
Secretary, the resulting product then being rounded off to the nearest 
dollar per year.
    (2) The estimated annual operating cost for electric refrigerators 
and electric refrigerator-freezers with an anti-sweat heater switch 
shall be the product of the following three factors: (i) The 
representative average-use cycle of 365 cycles per year, (ii) half the 
sum of the average per-cycle energy consumption for the standard cycle 
and the average per-cycle energy consumption for a test cycle type with 
the anti-sweat heater switch in the position set at the factory just 
prior to shipping, each in kilowatt-hours per cycle, determined 
according to 6.2 (6.3.6 for externally vented units) of appendix A1 of 
this subpart, and (iii) the representative average unit cost of 
electricity in dollars per kilowatt-hour as provided by the Secretary, 
the resulting product then being rounded off to the nearest dollar per 
year.
    (3) The estimated annual operating cost for any other specified 
cycle type for electric refrigerators and electric refrigerator-freezers 
shall be the product of the following three factors: (i) The 
representative average-use cycle of 365 cycles per year, (ii) the 
average per-cycle energy consumption for the specified cycle type, 
determined according to 6.2 (6.3.6 for externally vented units) of 
appendix A1 to this subpart, and (iii) the representative average unit 
cost of electricity in dollars per kilowatt-hour as provided by the 
Secretary, the resulting product then being rounded off to the nearest 
dollar per year.
    (4) The energy factor for electric refrigerators and electric 
refrigerator-freezers, expressed in cubic feet per kilowatt-hour per 
cycle, shall be--
    (i) For electric refrigerators and electric refrigerator-freezers 
not having an anti-sweat heater switch, the quotient of (A) the adjusted 
total volume in cubic feet, determined according to 6.1 of appendix A1 
of this subpart, divided by (B) the average per-cycle energy consumption 
for the standard cycle in kilowatt-hours per cycle, determined according 
to 6.2 (6.3.6 for externally vented units) of appendix A1 of this 
subpart, the resulting quotient then being rounded off to the second 
decimal place, and
    (ii) For electric refrigerators and electric refrigerator-freezers 
having an anti-sweat heater switch, the quotient of (A) the adjusted 
total volume in cubic feet, determined according to 6.1 of appendix A1 
of this subpart, divided by (B) half the sum of the average per-cycle 
energy consumption for the standard cycle and the average per-cycle 
energy consumption for a test cycle type with the anti-sweat heater 
switch in the position set at the factory just prior to shipping, each 
in kilowatt-hours per cycle, determined according to 6.2 (6.3.6 for 
externally vented units) of appendix A1 of this subpart, the resulting 
quotient then being rounded off to the second decimal place.
    (5) The annual energy use of electric refrigerators and electric 
refrigerator-freezers equals the representative average use cycle of 365 
cycles per year times the average per-cycle energy consumption for the 
standard cycle in kilowatt-hours per cycle, determined according to 6.2 
(6.3.6 for externally vented units) of appendix A1 of this subpart.
    (6) Other useful measures of energy consumption for electric 
refrigerators and electric refrigerator-freezers shall be those measures 
of energy consumption for electric refrigerators and electric 
refrigerator-freezers which the Secretary determines are likely to 
assist consumers in making purchasing decisions which are derived from 
the application of appendix A1 of this subpart.

[[Page 128]]

    (7) The estimated regional annual operating cost for externally 
vented electric refrigerators and externally vented electric 
refrigerator-freezers without an anti-sweat heater switch shall be the 
product of the following three factors:
    (i) The representative average-use cycle of 365 cycles per year,
    (ii) The regional average per-cycle energy consumption for the 
standard cycle in kilowatt-hours per cycle, determined according to 
6.3.7 of appendix A1 of this subpart and
    (iii) The representative average unit cost of electricity in dollars 
per kilowatt-hour as provided by the Secretary, the resulting product 
then being rounded off to the nearest dollar per year.
    (8) The estimated regional annual operating cost for externally 
vented electric refrigerators and externally vented electric 
refrigerator-freezers with an anti-sweat heater switch shall be the 
product of the following three factors:
    (i) The representative average-use cycle of 365 cycles per year,
    (ii) Half the sum of the average per-cycle energy consumption for 
the standard cycle and the regional average per-cycle energy consumption 
for a test cycle with the anti-sweat heater switch in the position set 
at the factory just prior to shipping, each in kilowatt-hours per cycle, 
determined according to 6.3.7 of appendix A1 of this subpart, and
    (iii) The representative average unit cost of electricity in dollars 
per kilowatt-hour as provided by the Secretary, the resulting product 
then being rounded off to the nearest dollar per year.
    (9) The estimated regional annual operating cost for any other 
specified cycle for externally vented electric refrigerators and 
externally vented electric refrigerator-freezers shall be the product of 
the following three factors:
    (i) The representative average-use cycle of 365 cycles per year,
    (ii) The regional average per-cycle energy consumption for the 
specified cycle, in kilowatt-hours per cycle, determined according to 
6.3.7 of appendix A1 of this subpart, and
    (iii) The representative average unit cost of electricity in dollars 
per kilowatt-hour as provided by the Secretary, the resulting product 
then being rounded off to the nearest dollar per year.
    (b) Freezers. (1) The estimated annual operating cost for freezers 
without an anti-sweat heater switch shall be the product of the 
following three factors: (i) The representative average-use cycle of 365 
cycles per year, (ii) the average per-cycle energy consumption for the 
standard cycle in kilowatt-hours per cycle, determined according to 6.2 
of appendix B1 of this subpart, and (iii) the representative average 
unit cost of electricity in dollars per kilowatt-hour as provided by the 
Secretary, the resulting product then being rounded off to the nearest 
dollar per year.
    (2) The estimated annual operating cost for freezers with an anti-
sweat heater switch shall be the product of the following three factors: 
(i) The representative average-use cycle of 365 cycles per year, (ii) 
half the sum of the average per-cycle energy consumption for the 
standard cycle and the average per-cycle energy consumption for a test 
cycle type with the anti-sweat heater switch in the position set at the 
factory just prior to shipping, each in kilowatt-hours per cycle, 
determined according to 6.2 of appendix B1 of this subpart, and (iii) 
the representative average unit cost of electricity in dollars per 
kilowatt-hour as provided by the Secretary, the resulting product then 
being rounded off to the nearest dollar per year.
    (3) The estimated annual operating cost for an other specified cycle 
type for freezers shall be the product of the following three factors: 
(i) The representative average-use cycle of 365 cycles per year, (ii) 
the average per-cycle energy consumption for the specified cycle type, 
determined according to 6.2 of appendix B1 of this subpart and (iii) the 
representative average unit cost of electricity in dollars per kilowatt-
hour as provided by the Secretary, the resulting product then being 
rounded off to the nearest dollar per year.
    (4) The energy factor for freezers, expressed in cubic feet per 
kilowatt-hour per cycle, shall be--
    (i) For freezers not having an anti-sweat heater switch, the 
quotient of

[[Page 129]]

(A) the adjusted net refrigerated volume in cubic feet, determined 
according to 6.1 of appendix B1 of this subpart, divided by (B) the 
average per-cycle energy consumption for the standard cycle in kilowatt-
hours per cycle, determined according to or 6.2 of appendix B1 of this 
subpart, the resulting quotient then being rounded off to the second 
decimal place, and
    (ii) For freezers having an anti-sweat heater switch, the quotient 
of (A) the adjusted net refrigerated volume in cubic feet, determined 
according to 6.1 of appendix B1 of this subpart, divided by (B) half the 
sum of the average per-cycle energy consumption for the standard cycle 
and the average per-cycle energy consumption for a test cycle type with 
the anti-sweat switch in the position set at the factory just prior to 
shipping, each in kilowatt-hours per cycle, determined according to or 
6.2 of appendix B1 of this subpart, the resulting quotient then being 
rounded off to the second decimal place.
    (5) The annual energy use of all freezers equals the representative 
average-use cycle of 365 cycles per year times the average per-cycle 
energy consumption for the standard cycle in kilowatt-hours per cycle, 
determined according to 6.2 of appendix B1 of this subpart.
    (6) Other useful measures of energy consumption for freezers shall 
be those measures of energy consumption for freezers which the Secretary 
determines are likely to assist consumers in making purchasing decisions 
and which are derived from the application of appendix B1 of this 
subpart.
    (c) Dishwashers. (1) The Estimated Annual Operating Cost (EAOC) for 
dishwashers must be rounded to the nearest dollar per year and is 
defined as follows:
    (i) When cold water (50 [deg]F) is used,
    (A) For dishwashers having a truncated normal cycle as defined in 
section 1.15 of appendix C to this subpart,

EAOC = (DexS) + ( DexNx(M-(ED/2))).

    (B) For dishwashers not having a truncated normal cycle,

EAOC = (DexS) + ( DexNxM)

Where,

De = the representative average unit cost of electrical 
energy, in dollars per kilowatt-hour, as provided by the Secretary,
S = the annual standby electrical energy in kilowatt-hours per year and 
determined according to section 5.6 of Appendix C to this subpart,
N = the representative average dishwasher use of 215 cycles per year,
M = the machine electrical energy consumption per-cycle for the normal 
cycle as defined in section 1.6 of Appendix C to this subpart, in 
kilowatt-hours and determined according to section 5.1 of Appendix C to 
this subpart,
ED = the drying energy consumption defined as energy consumed 
using the power-dry feature after the termination of the last rinse 
option of the normal cycle and determined according to section 5.2 of 
appendix C to this subpart.

    (ii) When electrically-heated water (120 [deg]F or 140 [deg]F) is 
used,
    (A) For dishwashers having a truncated normal cycle as defined in 
section 1.15 of appendix C to this subpart,

EAOC = (DexS) + (DexNx(M-(ED/2)))+ 
    (DexNxW)

    (B) For dishwashers not having a truncated normal cycle,

EAOC = (DexS) + (DexNxM)+ (DexNxW)

Where,

De, S, N, M, and ED, are defined in paragraph 
(c)(1)(i) of this section, and
W = the total water energy consumption per cycle for the normal cycle as 
defined in section 1.6 of Appendix C to this subpart, in kilowatt-hours 
per cycle and determined according to section 5.4 of Appendix C to this 
subpart.

    (iii) When gas-heated or oil-heated water is used,
    (A) For dishwashers having a truncated normal cycle as defined in 
section 1.15 of appendix C to this subpart,

EAOCg = (DexS) + (DexNx(M-
    (ED/2)))+ (DgxNxWg)

    (B) For dishwashers not having a truncated normal cycle,

    (B) For dishwashers not having a truncated normal cycle,

EAOCg = (DexS) + (DexNxM)+ 
    (DgxNxWg)

Where,

De, S, N, M, and ED are defined in paragraph 
(c)(1)(i) of this section,
Dg = the representative average unit cost of gas or oil, as 
appropriate, in dollars per Btu, as provided by the Secretary, and

[[Page 130]]

Wg = the total water energy consumption per cycle for the 
normal cycle as defined in section 1.6 of appendix C to this subpart, in 
Btu's per cycle and determined according to section 5.5 of appendix C to 
this subpart.

    (2) The energy factor for dishwashers, EF, expressed in cycles per 
kilowatt-hour is defined as follows:
    (i) When cold water (50 [deg]F) is used,
    (A) For dishwashers having a truncated normal cycle as defined in 
section 1.15 of appendix C to this subpart,

EF = 1/(M-(ED/2))

    (B) For dishwashers not having a truncated normal cycle,

EF = 1/M


Where,

M, and ED are defined in paragraph (c)(1)(i) of this section.

    (ii) When electrically-heated water (120 [deg]F or 140 [deg]F) is 
used,
    (A) For dishwashers having a truncated normal cycle as defined in 
section 1.15 of appendix C to this subpart,

EF = 1/(M-(ED/2)+W)

    (B) For dishwashers not having a truncated normal cycle,

EF = 1/(M+W)

Where,

M, and ED are defined in paragraph (c)(1)(i) of this section, 
and W is defined in paragraph (c)(1)(ii)of this section.

    (3) The estimated annual energy use, EAEU, expressed in kilowatt-
hours per year is defined as follows:
    (i) For dishwashers having a truncated normal cycle as defined in 
section 1.15 of appendix C to this subpart,

EAEU = (M-(ED/2)+W)xN+S

Where,

M, ED, N and S are defined in paragraph (c)(1)(i) of this 
section, and W is defined in paragraph (c)(1)(ii) of this section.

    (ii) For dishwashers not having a truncated normal cycle,

EAEU = (M+W)xN+S

Where,

M, N and S are defined in paragraph (c)(1)(i) of this section, and W is 
defined in paragraph (c)(1)(ii) of this section.

    (4) Other useful measures of energy consumption for dishwashers are 
those which the Secretary determines are likely to assist consumers in 
making purchasing decisions and which are derived from the application 
of appendix C to this subpart.
    (d) Clothes dryers. (1) The estimated annual operating cost for 
clothes dryers shall be--
    (i) For an electric clothes dryer, the product of the following 
three factors: (A) The representative average-use cycle of 416 cycles 
per year, (B) the total per-cycle energy consumption in kilowatt-hours 
per-cycle, determined according to 4.1 of appendix D to this subpart, 
and (C) the representative average unit cost in dollars per kilowatt-
hour as provided by the Secretary, the resulting product then being 
rounded off to the nearest dollar per year, and
    (ii) For a gas clothes dryer, the product of the representative 
average-use cycle of 416 cycles per year times the sum of (A) the 
product of the gas dryer electric per-cycle energy consumption in 
kilowatt-hours per cycle, determined according to 4.2 of appendix D to 
this subpart, times the representative average unit cost in dollars per 
kilowatt-hour as provided by the Secretary plus (B) the product of the 
total gas dryer gas energy consumption per cycle, in Btu's per cycle, 
determined according to 4.5 of appendix D of this subpart, times the 
representative average unit cost in dollars per Btu as provided by the 
Secretary, the resulting product then being rounded off to the nearest 
dollar per year.
    (2) The energy factor, expressed in pounds of clothes per kilowatt-
hour, for clothes dryers shall be either the quotient of a 3-pound bone-
dry test load for compact dryers, as defined by 2.6.1 of appendix D to 
this subpart or the quotient of a 7 pound bone-dry test load for 
standard dryers, as defined by 2.6.2 of appendix D to this subpart, as 
applicable, divided by the clothes dryer energy consumption per cycle, 
as determined according to 4.1 for electric clothes dryers and 4.6 for 
gas clothes dryers of appendix D to this subpart, the resulting quotient 
then being rounded off to the nearest hundredth (.01).
    (3) Other useful measures of energy consumption for clothes dryers 
shall be those measures of energy consumption for clothes dryers which 
the Secretary

[[Page 131]]

determines are likely to assist consumers in making purchasing decisions 
and which are derived from the application of appendix D to this 
subpart.
    (e) Water Heaters. (1) The estimated annual operating cost for water 
heaters shall be--
    (i) For a gas or oil water heater, the product of the annual energy 
consumption, determined according to section 6.1.8 or 6.2.5 of appendix 
E of this subpart, times the representative average unit cost of gas or 
oil, as appropriate, in dollars per Btu as provided by the Secretary, 
the resulting product then being rounded off to the nearest dollar per 
year.
    (ii) For an electric water heater, the product of the annual energy 
consumption, determined according to section 6.1.8 or 6.2.5 of appendix 
E of this subpart, times the representative average unit cost of 
electricity in dollars per kilowatt-hour as provided by the Secretary, 
divided by 3412 Btu per kilowatt-hour, the resulting quotient then being 
rounded off to the nearest dollar per year.
    (2) The energy factor for the water heaters shall be--
    (i) For a gas or oil water heater, as determined by section 6.1.7 or 
6.2.4 of appendix E of this subpart rounded off to the nearest 0.01.
    (ii) For an electric water heater, as determined by section 6.1.7 or 
6.2.4 of appendix E of this subpart rounded off to the nearest 0.01.
    (3) Other useful measures of energy consumption for water heaters 
shall be those measures of energy consumption for water heaters which 
the Secretary determines are likely to assist consumers in making 
purchasing decisions and which are derived from the application of 
appendix E of this subpart.
    (4) The alternative uniform test method for measuring the energy 
consumption of untested water heaters shall be that set forth in section 
7.0 of appendix E of this subpart.
    (f) Room air conditioners. (1) The estimated annual operating cost 
for room air conditioners, expressed in dollars per year, shall be 
determined by multiplying the following three factors: (i) Electrical 
input power in kilowatts as determined in accordance with 4.2 of 
appendix F to this subpart, (ii) The representative average-use cycle of 
750 hours of compressor operation per year, and (iii) A representative 
average unit cost of electrical energy in dollars per kilowatt-hour as 
provided by the Secretary, the resulting product then being rounded off 
to the nearest dollar per year.
    (2) The energy efficiency ratio for room air conditioners, expressed 
in Btu's per watt-hour, shall be the quotient of: (i) The cooling 
capacity in Btu's per hour as determined in accordance with 4.1 of 
appendix F to this subpart divided by: (ii) The electrical input power 
in watts as determined in accordance with 4.2 of appendix F to this 
subpart the resulting quotient then being rounded off to the nearest 0.1 
Btu per watt-hour.
    (3) The average annual energy consumption for room air conditioners, 
expressed in kilowatt-hours per year, shall be determined by multiplying 
together the following two factors: (i) Electrical input power in 
kilowatts as determined in accordance with 4.2 of appendix F to this 
subpart, and (ii) A representative average use cycle of 750 hours of 
compressor operation per year, the resulting product then being rounded 
off to the nearest kilowatt-hour per year.
    (4) Other useful measures of energy consumption for room air 
conditioners 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 F to 
this subpart.
    (g) Unvented home heating equipment. (1) The estimated annual 
operating cost for primary electric heaters, shall be the product of: 
(i) The average annual electric energy consumption in kilowatt-hours per 
year, determined according to section 3.1 of appendix G of this subpart 
and (ii) the representative average unit cost in dollars per kilowatt-
hour as provided pursuant to section 323(b)(2) of the Act, the resulting 
product then being rounded off to the nearest dollar per year.

[[Page 132]]

    (2) The estimated regional annual operating cost for primary 
electric heaters, shall be the product of: (i) The regional annual 
electric energy consumption in kilowatt-hours per year for primary 
heaters determined according to section 3.2 of appendix G of this 
subpart and (ii) the representative average unit cost in dollars per 
kilowatt-hour as provided pursuant to section 323(b)(2) of the Act, the 
resulting product then being rounded off to the nearest dollar per year.
    (3) The estimated operating cost per million Btu output shall be--
    (i) For primary and supplementary electric heaters and unvented gas 
and oil heaters without an auxiliary electric system, the product of: 
(A) One million; and (B) the representative unit cost in dollars per Btu 
for natural gas, propane, or oil, as provided pursuant to section 
323(b)(2) of the Act as appropriate, or the quotient of the 
representative unit cost in dollars per kilowatt-hour, as provided 
pursuant to section 323(b)(2) of the Act, divided by 3,412 Btu per 
kilowatt hour, the resulting product then being rounded off to the 
nearest 0.01 dollar per million Btu output; and
    (ii) For unvented gas and oil heaters with an auxiliary electric 
system, the product of: (A) The quotient of one million divided by the 
rated output in Btu's per hour as determined in 3.4 of appendix G of 
this subpart; and (B) the sum of: (1) The product of the maximum fuel 
input in Btu's per hour as determined in 2.2. 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 2.1 of appendix G 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) The rated output for unvented heaters is the rated output as 
determined according to either sections 3.3 or 3.4 of appendix G of this 
subpart, as appropriate, with the result being rounded to the nearest 
100 Btu per hour.
    (5) Other useful measures of energy consumption for unvented home 
heating equipment shall be those measures of energy consumption for 
unvented home heating equipment which the Secretary determines are 
likely to assist consumers in making purchasing decisions and which are 
derived from the application of appendix G of this subpart.
    (h) Television sets. (1) The estimated average annual operating cost 
for television sets shall be the product of:
    (i) The average annual energy consumed by the television set in 
kilowatt-hours per year, determined according to 3.0 of appendix H of 
this subpart, and
    (ii) The representative average unit cost of energy in dollars per 
kilowatt-hour as provided by the Secretary, the resulting product then 
being rounded off to the nearest dollar per year.
    (2) The receiver energy efficiency factor for television sets shall 
be:
    (i) For color television sets, the product of the estimated minimum 
power requirement (.130 kilowatts) and the average annual hours of use 
(2,200 hr/yr.), divided by the average annual energy consumed by the 
television set in kilowatt-hours per year, determined according to 3.0 
of appendix H to this subpart. The resultant is then multiplied by 100 
and expressed as a percent.
    (ii) For monochrome television sets, the product of the estimated 
minimum power requirement (.040 kilowatts) and the average annual hours 
of use (2,200 hr/yr.), divided by the average annual energy consumed by 
the television set in kilowatt-hours per year determined according to 
3.0 of appendix H of this subpart. The result is then multiplied by 100 
and expressed as a percent.
    (3) Other useful measures of energy consumption for television sets 
shall be those measures of energy consumption for television sets which 
the Secretary determines are likely to assist consumers in making 
purchasing decisions and which are derived from the application of 
appendix H of this subpart.
    (i) Kitchen ranges and ovens. (1) The estimated annual operating 
cost for conventional ranges, conventional cooking tops, conventional 
ovens,

[[Page 133]]

microwave ovens, and microwave/conventional ranges shall be the sum of 
the following products: (i) The total annual electrical energy 
consumption for any electrical energy usage, in kilowatt-hours (kWh's) 
per year, times the representative average unit cost for electricity, in 
dollars per kWh, as provided pursuant to section 323(b)(2) of the Act; 
plus (ii) the total annual gas energy consumption for any natural gas 
usage, in British thermal units (Btu's) per year, times the 
representative average unit cost for natural gas, in dollars per Btu, as 
provided pursuant to section 323(b)(2) of the Act; plus (iii) the total 
annual gas energy consumption for any propane usage, in Btu's per year, 
times the representative average unit cost for propane, in dollars per 
Btu, as provided pursuant to section 323(b)(2) of the Act. The total 
annual energy consumption for conventional ranges, conventional cooking 
tops, conventional ovens, microwave ovens, and microwave/conventional 
ranges shall be as determined according to 4.3, 4.2.2, 4.1.2, and 4.4.3, 
respectively, of appendix I to this subpart. The estimated annual 
operating cost shall be rounded off to the nearest dollar per year, 
except for microwave ovens, for which the estimated annual operating 
cost shall be rounded off to the nearest one-quarter of a dollar per 
year.
    (2) The cooking efficiency for conventional cooking tops, 
conventional ovens, and microwave ovens shall be the ratio of the 
cooking energy output for the test to the cooking energy input for the 
test, as determined according to 4.2.1, 4.1.3, and 4.4.4, respectively, 
of appendix I to this subpart. The final cooking efficiency values shall 
be rounded off to three significant digits.
    (3) [Reserved]
    (4) The energy factor for conventional ranges, conventional cooking 
tops, conventional ovens, microwave ovens, and microwave/conventional 
ranges shall be the ratio of the annual useful cooking energy output to 
the total annual energy input, as determined according to 4.3, 4.2.3, 
4.1.4, 4.4.5, respectively, of Appendix I to this subpart. The final 
energy factor values shall be rounded off to three significant digits.
    (5) There shall be two estimated annual operating costs, two cooking 
efficiencies, and two energy factors for convertible cooking 
appliances--(i) an estimated annual operating cost, a cooking efficiency 
and an energy factor which represent values for those three measures of 
energy consumption for the operation of the appliance with natural gas; 
and (ii) an estimated annual operating cost, a cooking efficiency and an 
energy factor which represent values for those three measures of energy 
consumption for the operation of the appliance with LP-gas.
    (6) The estimated annual operating cost for convertible cooking 
appliances which represents natural gas usage, as described in paragraph 
(i)(5)(i) of this section, shall be determined according to paragraph 
(i)(1) of this section using the total annual gas energy consumption for 
natural gas times the representative average unit cost for natural gas.
    (7) The estimated annual operating cost for convertible cooking 
appliances which represents LP-gas usage, as described in paragraph 
(i)(5)(ii) of this section, shall be determined according to paragraph 
(i)(1) of this section using the representative average unit cost for 
propane times the total annual energy consumption of the test gas, 
either propane or natural gas.
    (8) The cooking efficiency for convertible cooking appliances which 
represents natural gas usage, as described in paragraph (i)(5)(i) of 
this section, shall be determined according to paragraph (i)(2) of this 
section when the appliance is tested with natural gas.
    (9) The cooking efficiency for convertible cooking appliances which 
represents LP-gas usage, as described in paragraph (i)(5)(ii) of this 
section, shall be determined according to paragraph (i)(2) of this 
section, when the appliance is tested with either natural gas or 
propane.
    (10) The energy factor for convertible cooking appliances which 
represents natural gas usage, as described in paragraph (i)(5)(i) of 
this section, shall be determined according to paragraph (i)(4) of this 
section when the appliance is tested with natural gas.

[[Page 134]]

    (11) The energy factor for convertible cooking appliances which 
represents LP-gas usage, as described in paragraph (i)(5)(ii) of this 
section, shall be determined according to paragraph (i)(4) of this 
section when the appliance is tested with either natural gas or propane.
    (12) Other useful measures of energy consumption for conventional 
ranges, conventional cooking tops, conventional ovens, microwave ovens 
and microwave/conventional ranges 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 I to this subpart.
    (j) Clothes washers. (1) The estimated annual operating cost for 
automatic and semi-automatic clothes washers shall be--
    (i) When electrically heated water is used, the product of the 
following three factors:
    (A) The representative average-use of 392 cycles per year,
    (B) The total per-cycle energy consumption in kilowatt-hours per 
cycle determined according to 4.1.6 of appendix J before appendix J1 
becomes mandatory and 4.1.7 of appendix J1 when appendix J1 becomes 
mandatory, (see the note at the beginning of appendix J1), and
    (C) The representative average unit cost in dollars per kilowatt-
hour as provided by the Secretary, the resulting product then being 
rounded off to the nearest dollar per year, and
    (ii) When gas-heated or oil-heated water is used, the product of: 
the representative average-use of 392 cycles per year and the sum of 
both:
    (A) The product of the per-cycle machine electrical energy 
consumption in kilowatt-hours per cycle, determined according to 4.1.5 
of appendix J before the date that appendix J1 to the subpart becomes 
mandatory or 4.1.6 of appendix J1 upon the date that appendix J1 to this 
subpart becomes mandatory, and the representative average unit cost in 
dollars per kilowatt-hours as provided by the Secretary, and
    (B) The product of the per-cycle water energy consumption for gas-
heated or oil-heated water in BTU per cycle, determined according to 
4.1.4 of appendix J before the date that appendix J1 becomes mandatory 
or 4.1.4 of appendix J1 upon the date that appendix J1 to this subpart 
becomes mandatory, and the representative average unit cost in dollars 
per Btu for oil or gas, as appropriate, as provided by the Secretary, 
the resulting product then being rounded off to the nearest dollar per 
year.
    (2)(i) The energy factor for automatic and semi-automatic clothes 
washers is determined in accordance with 4.5 of appendix J before the 
date that appendix J1 becomes mandatory or 4.5 of appendix J1 upon the 
date that appendix J1 to this subpart becomes mandatory. The result 
shall be rounded off to the nearest 0.01 cubic foot per kilowatt-hours.
    (ii) The modified energy factor for automatic and semi-automatic 
clothes washers is determined in accordance with 4.4 of appendix J 
before the date that appendix J1 becomes mandatory or 4.4 of appendix J1 
upon the date that appendix J1 to this subpart becomes mandatory. The 
result shall be rounded off to the nearest 0.01 cubic foot per kilowatt-
hours.
    (3) Other useful measures of energy consumption for automatic or 
semi-automatic clothes washers 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 J before the date that appendix J1 becomes 
mandatory or appendix J1 upon the date that appendix J1 to this subpart 
becomes mandatory. In addition, the annual water consumption of a 
clothes washer can be determined by the product of:
    (A) The representative average-use of 392 cycles per year, and
    (B) The total weighted per-cycle water consumption in gallons per 
cycle determined according to 4.3.2 of appendix J before the date that 
appendix J1 becomes mandatory or 4.2.2 of appendix J1 upon the date that 
appendix J1 to this subpart becomes mandatory. The water consumption 
factor can be determined in accordance with 4.3.3 of appendix J before 
the date that appendix

[[Page 135]]

J1 becomes mandatory or 4.2.3 of appendix J1 upon the date that appendix 
J1 to this subpart becomes mandatory. The remaining moisture content can 
be determined in accordance with 3.3 of appendix J before the date that 
appendix J1 becomes mandatory or 3.8 of appendix J1 upon the date that 
appendix J1 to this subpart becomes mandatory.
    (k)-(l) [Reserved]
    (m) Central Air Conditioners. (1) The estimated annual operating 
cost for cooling-only units and air-source heat pumps shall be one of 
the following:
    (i) For cooling-only units or the cooling portion of the estimated 
annual operating cost for air-source heat pumps which provide both 
heating and cooling, the product of: (A) The quotient of the cooling 
capacity, in Btu's per hour, determined from the steady-state wet-coil 
test (Test A) measured at the highest compressor speed, as described in 
section 3.1 of appendix M to this subpart, divided by the seasonal 
energy efficiency ratio, in Btu's per watt-hour, determined from section 
5.1 of appendix M to this subpart; (B) the representative average use 
cycle for cooling of 1,000 hours per year; (C) a conversion factor of 
0.001 kilowatt per watt; and (D) the representative average unit cost of 
electricity in dollars per kilowatt-hour as provided pursuant to section 
323(b)(2) of the Act, the resulting product then being rounded off to 
the nearest dollar per year;
    (ii) For air-source heat pumps which provide only heating or the 
heating portion of the estimated annual operating cost for air-source 
heat pumps which provide both heating and cooling, the product of: (A) 
The quotient of the standardized design heating requirement, in Btu's 
per hour, nearest to the capacity measured in the high temperature test, 
determined in sections 5.2 and 6.2.6 of appendix M to this subpart, 
divided by the heating seasonal performance factor, in Btu's per watt-
hour, calculated for heating region IV corresponding to the above 
mentioned standardized design heating requirement determined from 
section 5.2 of appendix M to this subpart; (B) the representative 
average use cycle for heating of 2,080 hours per year; (C) the 
adjustment factor of 0.77 which serves to adjust the calculated design 
heating requirement and heating load hours to the actual load 
experienced by a heating system; (D) a conversion factor of 0.001 
kilowatt per watt; and (E) the representative average unit cost of 
electricity in dollars per kilowatt-hour as provided pursuant to section 
323(b)(2) of the Act, the resulting product then being rounded off to 
the nearest dollar per year; or
    (iii) For air-source heat pumps which provide both heating and 
cooling, the estimated annual operating cost is the sum of the quantity 
determined in paragraph (m)(1)(i) of this section added to the quantity 
determined in paragraph (m)(1)(ii) of this section.
    (2) The estimated regional annual operating cost for cooling-only 
units and for air-source heat pumps shall be one of the following:
    (i) For cooling-only units or the cooling portion of the estimated 
regional annual operating cost for air-source heat pumps which provide 
both heating and cooling, the product of: (A) The quotient of the 
cooling capacity, in Btu's per hour, determined from the steady-state 
wet-coil test (Test A) measured at the highest compressor speed, as 
described in section 3.1 of appendix M to this subpart, divided by the 
seasonal energy efficiency ratio, in Btu's per watt-hour, determined 
from section 5.1 of appendix M to this subpart; (B) the estimated number 
of regional cooling load hours per year determined from section 6.1.3 of 
appendix M to this subpart; (C) a conversion factor of 0.001 kilowatts 
per watt; and (D) the representative average unit cost of electricity in 
dollars per kilowatt-hour as provided pursuant to section 323(b)(2) of 
the Act, the resulting product then being rounded off to the nearest 
dollar per year;
    (ii) For air-source heat pumps which provide only heating or the 
heating portion of the estimated regional annual operating cost for air-
source heat pumps which provide both heating and cooling, the product 
of: (A) The quotient of the standardized design heating requirement, in 
Btu's per hour, nearest to the capacity measured in the high temperature 
test (Test A), determined in sections 5.2 and 6.2.6 of appendix M to 
this subpart, divided by

[[Page 136]]

the heating seasonal performance factor, in Btu's per watt-hour, 
calculated for the appropriate region of interest and corresponding to 
the above mentioned standardized design heating requirement determined 
from section 5.2 of appendix M to this subpart; (B) the estimated number 
of regional heating load hours per year determined from section 6.2.5 of 
appendix M to this subpart; (C) the adjustment factor of 0.77 which 
serves to adjust the calculated design heating requirement and heating 
load hours to the actual load experienced by a heating system; (D) a 
conversion factor of 0.001 kilowatts per watt; and (E) the 
representative average unit cost of electricity in dollars per kilowatt-
hour as provided pursuant to section 323(b)(2) of the Act, the resulting 
product then being rounded off to the nearest dollar per year; or
    (iii) For air-source heat pumps which provide both heating and 
cooling, the estimated regional annual operating cost is the sum of the 
quantity determined in paragraph (m)(3)(i) of this section added to the 
quantity determined in paragraph (m)(3)(ii) of this section.
    (3) The measure(s) of efficiency for cooling-only units and air-
source heat pumps shall be one or more of the following:
    (i) The seasonal energy efficiency ratio for cooling-only units and 
air-source heat pumps which provide cooling shall be the seasonal energy 
efficiency ratio, in Btu's per watt-hour, determined according to 
section 5.1 of appendix M to this subpart, rounded off to the nearest 
0.05.
    (ii) The heating seasonal performance factors for air-source heat 
pumps shall be the heating seasonal performance factors, in Btu's per 
watt-hour, determined according to section 5.2 of appendix M to this 
subpart for each applicable standardized design heating requirement 
within each climatic region, rounded off to the nearest 0.05.
    (iii) The annual performance factors for air-source heat pumps which 
provide heating and cooling, shall be the annual performance factors, in 
Btu's per watt-hour, determined according to section 5.3 of appendix M 
to this subpart for each standardized design heating requirement within 
each climatic region, rounded off to the nearest 0.05.
    (4) Other useful measures of energy consumption for central air 
conditioners 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 Sec. 
430.23(m)(4) as approved by the Assistant Secretary for Conservation and 
Renewable Energy in accordance with Sec. 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 
10.2.2 or 10.3 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 10.2.3 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 10 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 10.1 of appendix N of this 
subpart for gas and oil furnaces and determined in accordance with 
section 11.1

[[Page 137]]

of American National Standards Institute/American Society of Heating, 
Refrigerating, and Air-Conditioning Engineers (ANSI/ASHRAE) Standard 
103-1993 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 10.5.1 or 10.5.3 
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 10.5.2 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 10.4 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.
    (o) 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 annual operating cost for vented home heating 
equipment is the sum of: (i) The product of the average annual fuel 
energy consumption, in Btu's per year for natural gas, propane, or oil 
fueled vented home heating equipment, determined according to section 
4.6.2 of appendix O of this subpart, and the representative average 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 
(ii) The product of the average annual auxiliary electric energy 
consumption in kilowatt-hours per year determined according to section 
4.6.3 of appendix O of this subpart, and the representative average unit 
cost in dollars per kilowatt-hours as provided pursuant to section 
323(b)(2) of the Act, the resulting sum then being rounded off to the 
nearest dollar per year.
    (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.

[[Page 138]]

    (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.
    (p) Pool heaters. (1) The estimated annual operating cost for pool 
heaters is the sum of:
    (i) The product of the average annual fuel energy consumption, in 
Btu's per year, of natural gas or oil fueled pool heaters, determined 
according to section 4.2 of appendix P of this subpart, and the 
representative average unit cost in dollars per Btu for natural gas or 
oil, 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 
4.3 of appendix P of this subpart, and the representative average unit 
cost in dollars per kilowatt-hours as provided pursuant to section 
323(b)(2) of the Act, the resulting sum then being rounded off to the 
nearest dollar per year.
    (2) The thermal efficiency of pool heaters, expressed as a percent, 
shall be determined in accordance with section 4 of appendix P to this 
subpart.
    (q) Fluorescent Lamp Ballasts. (1) The Estimated Annual Energy 
Consumption (EAEC) for fluorescent lamp ballasts, expressed in kilowatt-
hours per year, shall be the product of: (i) The input power in 
kilowatts as determined in accordance with section 3.3.1 of appendix Q 
to this subpart and (ii) the representative average use cycle of 1,000 
hours per year, the resulting product then being rounded off to the 
nearest kilowatt-hour per year.
    (2) Ballast Efficacy Factor (BEF) shall be as determined in section 
4.2 of appendix Q of this subpart.
    (3) The Estimated Annual Operating Cost (EAOC) for fluorescent lamp 
ballasts, expressed in dollars per year, shall be the product of: (i) 
The representative average unit energy cost of electricity in dollars 
per kilowatt-hour as provided by the Secretary, (ii) the representative 
average use cycle of 1,000 hours per year, and (iii) the input power in 
kilowatts as determined in accordance with section 3.3.1 of appendix Q 
to this subpart, the resulting product then being rounded off to the 
nearest dollar per year.
    (4) Other useful measures which may be applicable. [Reserved]
    (r) General Service Fluorescent Lamps and General Service 
Incandescent Lamps. (1) The estimated annual energy consumption for 
general service fluorescent lamps and incandescent reflector lamps, 
expressed in kilowatt-hours per year, shall be the product of the input 
power in kilowatts as determined in accordance with section 4 of 
Appendix R to this subpart and an average annual use specified by the 
manufacturer, with the resulting product rounded off to the nearest 
kilowatt-hour per year. Manufacturers must provide a clear and accurate 
description of the assumptions used for the estimated annual energy 
consumption.
    (2) The lamp efficacy for general service fluorescent lamps shall be 
equal to the average lumen output divided by the average lamp wattage as 
determined in section 4 of Appendix R of this subpart, with the 
resulting quotient rounded off to the nearest lumen per watt.
    (3) The lamp efficacy for incandescent reflector lamps shall be 
equal to the average lumen output divided by the average lamp wattage as 
determined in section 4 of Appendix R of this subpart, with the 
resulting quotient rounded off to the nearest tenth of a lumen per watt.
    (4) The color rendering index of a general service fluorescent lamp 
shall be tested and determined in accordance with section 4.5 of 
Appendix R of this subpart and rounded off to the nearest unit.
    (s) Faucets. The maximum permissible water use allowed for lavatory 
faucets, lavatory replacement aerators, kitchen faucets, and kitchen 
replacement aerators, expressed in gallons and liters per minute (gpm 
and L/min), shall be measured in accordance to section 2(a) of Appendix 
S of this subpart. The maximum permissible water use allowed for 
metering faucets, expressed in gallons and liters per cycle (gal/cycle 
and L/cycle), shall be measured

[[Page 139]]

in accordance to section 2(a) of Appendix S of this subpart.
    (t) Showerheads. The maximum permissible water use allowed for 
showerheads, expressed in gallons and liters per minute (gpm and L/min), 
shall be measured in accordance to section 2(b) of Appendix S of this 
subpart.
    (u) Water closets. The maximum permissible water use allowed for 
water closets, expressed in gallons and liters per flush (gpf and Lpf), 
shall be measured in accordance to section 3(a) of Appendix T of this 
subpart.
    (v) Urinals. The maximum permissible water use allowed for urinals, 
expressed in gallons and liters per flush (gpf and Lpf), shall be 
measured in accordance to section 3(b) of Appendix T of this subpart.

[42 FR 27898, June 1, 1977]

    Editorial Note: For Federal Register citations affecting Sec. 
430.23, see the List of CFR Sections Affected, which appears in the 
Finding Aids section of the printed volume and on GPO Access.

    Effective Date Note: At 70 FR 59134, Oct. 11, 2005, Sec. 430.23 was 
amended by revising the section heading, paragraph (m) introductory 
heading and paragraph (m)(1), (2), and (3), effective Apr. 10, 2006. For 
the convenience of the user the revised text follows:

Sec. 430.23  Test procedure for measures of energy consumption.

                                * * * * *

    (m) Central air conditioners and heat pumps. (1) The estimated 
annual operating cost for cooling-only units and air-source heat pumps 
shall be one of the following:
    (i) For cooling-only units or the cooling portion of the estimated 
annual operating cost for air-source heat pumps which provide both 
heating and cooling, the product of:
    (A) The quotient of the cooling capacity, in Btu's per hour, 
determined from the steady-state wet-coil test (A or A2 
Test), as described in section 3.2 of appendix M to this subpart, 
divided by the seasonal energy efficiency ratio (SEER), in Btu's per 
watt-hour, determined from section 4.1 of appendix M to this subpart;
    (B) The representative average use cycle for cooling of 1,000 hours 
per year;
    (C) A conversion factor of 0.001 kilowatt per watt; and
    (D) The representative average unit cost of electricity in dollars 
per kilowatt-hour as provided pursuant to section 323(b)(2) of the Act, 
the resulting product then being rounded off to the nearest dollar per 
year.
    (ii) For air-source heat pumps which provide only heating or the 
heating portion of the estimated annual operating cost for air-source 
heat pumps which provide both heating and cooling, the product of:
    (A) The quotient of the standardized design heating requirement, in 
Btu's per hour, nearest to the heating Region IV minimum design heating 
requirement, determined in section 4.2 of appendix M to this subpart, 
divided by the heating seasonal performance factor (HSPF), in Btu's per 
watt-hour, calculated for heating Region IV corresponding to the above-
mentioned standardized design heating requirement and determined in 
section 4.2 of appendix M to this subpart;
    (B) The representative average use cycle for heating of 2,080 hours 
per year;
    (C) The adjustment factor of 0.77 which serves to adjust the 
calculated design heating requirement and heating load hours to the 
actual load experienced by a heating system;
    (D) A conversion factor of 0.001 kilowatt per watt; and
    (E) The representative average unit cost of electricity in dollars 
per kilowatt-hour as provided pursuant to section 323(b)(2) of the Act, 
the resulting product then being rounded off to the nearest dollar per 
year.
    (iii) For air-source heat pumps which provide both heating and 
cooling, the estimated annual operating cost is the sum of the quantity 
determined in paragraph (m)(1)(i) of this section added to the quantity 
determined in paragraph (m)(1)(ii) of this section.
    (2) The estimated regional annual operating cost for cooling-only 
units and for air-source heat pumps shall be one of the following:
    (i) For cooling-only units or the cooling portion of the estimated 
regional annual operating cost for air-source heat pumps which provide 
both heating and cooling, the product of:
    (A) The quotient of the cooling capacity, in Btu's per hour, 
determined from the steady-state wet-coil test (A or A2 
Test), as described in section 3.2 of appendix M to this subpart, 
divided by the seasonal energy efficiency ratio (SEER), in Btu's per 
watt-hour, determined from section 4.1 of appendix M to this subpart;
    (B) The estimated number of regional cooling load hours per year 
determined from Figure 3 in section 4.3 of appendix M to this subpart;
    (C) A conversion factor of 0.001 kilowatts per watt; and
    (D) The representative average unit cost of electricity in dollars 
per kilowatt-hour as provided pursuant to section 323(b)(2) of the Act, 
the resulting product then being rounded off to the nearest dollar per 
year.
    (ii) For air-source heat pumps which provide only heating or the 
heating portion of the estimated regional annual operating cost

[[Page 140]]

for air-source heat pumps which provide both heating and cooling, the 
product of:
    (A) The estimated number of regional heating load hours per year 
determined from Figure 2 in section 4.3 of appendix M to this subpart;
    (B) The quotient of the standardized design heating requirement, in 
Btu's per hour, for the appropriate generalized climatic region of 
interest (i.e., corresponding to the regional heating load hours from 
``A'') and determined in section 4.2 of appendix M to this subpart, 
divided by the heating seasonal performance factor (HSPF), in Btu's per 
watt-hour, calculated for the appropriate generalized climatic region of 
interest and corresponding to the above-mentioned standardized design 
heating requirement while being determined in section 4.2 of appendix M 
to this subpart;
    (C) The adjustment factor of 0.77 which serves to adjust the 
calculated design heating requirement and heating load hours to the 
actual load experienced by a heating system;
    (D) A conversion factor of 0.001 kilowatts per watt; and
    (E) The representative average unit cost of electricity in dollars 
per kilowatt-hour as provided pursuant to section 323(b)(2) of the Act, 
the resulting product then being rounded off to the nearest dollar per 
year.
    (iii) For air-source heat pumps which provide both heating and 
cooling, the estimated regional annual operating cost is the sum of the 
quantity determined in paragraph (m)(3)(i) of this section added to the 
quantity determined in paragraph (m)(3)(ii) of this section.
    (3) The measure(s) of efficiency of performance for cooling-only 
units and air-source heat pumps shall be one or more of the following:
    (i) The cooling mode efficiency measure for cooling-only units and 
air-source heat pumps which provide cooling shall be the seasonal energy 
efficiency ratio (SEER), in Btu's per watt-hour, determined according to 
section 4.1 of appendix M to this subpart, rounded off to the nearest 
0.05.
    (ii) The heating mode efficiency measure for air-source heat pumps 
shall be the heating seasonal performance factors (HSPF), in Btu's per 
watt-hour, determined according to section 4.2 of appendix M to this 
subpart for each applicable standardized design heating requirement 
within each climatic region, rounded off to the nearest 0.05.
    (iii) The annual efficiency measure for air-source heat pumps which 
provide heating and cooling, shall be the annual performance factors 
(APF), in Btu's per watt-hour, determined according to section 4.3 of 
appendix M to this subpart for each standardized design heating 
requirement within each climatic region, rounded off to the nearest 
0.05.

                                * * * * *