# 10 CFR Appendix I to Subpart B of Part 430 - Uniform Test Method for Measuring the Energy Consumption of Cooking Products

Appendix I to Subpart B of Part 430 - Uniform Test Method for Measuring the Energy Consumption of Cooking Products
Note:

Any representation related to energy or power consumption of cooking products made after June 14, 2017 must be based upon results generated under this test procedure. Upon the compliance date(s) of any energy conservation standard(s) for cooking products, use of the applicable provisions of this test procedure to demonstrate compliance with the energy conservation standard will also be required.

1. Definitions

The following definitions apply to the test procedures in this appendix, including the test procedures incorporated by reference:

1.1 Active mode means a mode in which the product is connected to a mains power source, has been activated, and is performing the main function of producing heat by means of a gas flame, electric resistance heating, electric inductive heating, or microwave energy.

1.2 Built-in means the product is enclosed in surrounding cabinetry, walls, or other similar structures on at least three sides, and can be supported by surrounding cabinetry or the floor.

1.3 Combined cooking product means a household cooking appliance that combines a cooking product with other appliance functionality, which may or may not include another cooking product. Combined cooking products include the following products: Conventional range, microwave/conventional cooking top, microwave/conventional oven, and microwave/conventional range.

1.4 Combined low-power mode means the aggregate of available modes other than active mode, but including the delay start mode portion of active mode.

1.5 Cooking area is an area on a conventional cooking top surface heated by an inducted magnetic field where cookware is placed for heating, where more than one cookware item can be used simultaneously and controlled separately from other cookware placed on the cooking area, and that is either -

(1) An area where no clear limitative markings for cookware are visible on the surface of the cooking top; or

(2) An area with limitative markings.

1.6 Cooking zone is a conventional cooking top surface that is either a single electric resistance heating element or multiple concentric sizes of electric resistance heating elements, an inductive heating element, or a gas surface unit that is defined by limitative markings on the surface of the cooking top and can be controlled independently of any other cooking area or cooking zone.

1.7 Cooking top control is a part of the conventional cooking top used to adjust the power and the temperature of the cooking zone or cooking area for one cookware item.

1.8 Cycle finished mode is a standby mode in which a conventional cooking top provides continuous status display following operation in active mode.

1.9 Drop-in means the product is supported by horizontal surface cabinetry.

1.10 EN 60350-2:2013 means the CENELEC test standard titled, “Household electric cooking appliances Part 2: Hobs - Methods for measuring performance,” Publication 60350-2 (2013) (incorporated by reference; see § 430.3).

1.11 Freestanding means the product is supported by the floor and is not specified in the manufacturer's instructions as able to be installed such that it is enclosed by surrounding cabinetry, walls, or other similar structures.

1.12 IEC 62301 (First Edition) means the test standard published by the International Electrotechnical Commission, titled “Household electrical appliances - Measurement of standby power,” Publication 62301 (First Edition 2005-06) (incorporated by reference; see § 430.3).

1.13 IEC 62301 (Second Edition) means the test standard published by the International Electrotechnical Commission, titled “Household electrical appliances - Measurement of standby power,” Publication 62301 (Edition 2.0 2011-01) (incorporated by reference; see § 430.3).

1.14 Inactive mode means a standby mode that facilitates the activation of active mode by remote switch (including remote control), internal sensor, or timer, or that provides continuous status display.

1.15 Maximum power setting means the maximum possible power setting if only one cookware item is used on the cooking zone or cooking area of a conventional cooking top.

1.16 Normal non-operating temperature means a temperature of all areas of an appliance to be tested that is within 5 °F (2.8 °C) of the temperature that the identical areas of the same basic model of the appliance would attain if it remained in the test room for 24 hours while not operating with all oven doors closed.

1.17 Off mode means any mode in which a cooking product is connected to a mains power source and is not providing any active mode or standby function, and where the mode may persist for an indefinite time. An indicator that only shows the user that the product is in the off position is included within the classification of an off mode.

1.18 Standard cubic foot (or liter (L)) of gas means that quantity of gas that occupies 1 cubic foot (or alternatively expressed in L) when saturated with water vapor at a temperature of 60 °F (15.6 °C) and a pressure of 30 inches of mercury (101.6 kPa) (density of mercury equals 13.595 grams per cubic centimeter).

1.19 Standby mode means any mode in which a cooking product is connected to a mains power source and offers one or more of the following user-oriented or protective functions which may persist for an indefinite time:

(1) Facilitation of the activation of other modes (including activation or deactivation of active mode) by remote switch (including remote control), internal sensor, or timer;

(2) Provision of continuous functions, including information or status displays (including clocks) or sensor-based functions. A timer is a continuous clock function (which may or may not be associated with a display) that allows for regularly scheduled tasks and that operates on a continuous basis.

1.20 Thermocouple means a device consisting of two dissimilar metals which are joined together and, with their associated wires, are used to measure temperature by means of electromotive force.

1.21 Symbol usage. The following identity relationships are provided to help clarify the symbology used throughout this procedure.

A - Number of Hours in a Year
C - Specific Heat
E - Energy Consumed
H - Heating Value of Gas
K - Conversion for Watt-hours to Kilowatt-hours or Btu to kBtu
Ke - 3.412 Btu/Wh, Conversion for Watt-hours to Btu
M - Mass
n - Number of Units
P - Power
Q - Gas Flow Rate
T - Temperature
t - Time
V - Volume of Gas Consumed
2. Test Conditions

2.1 Installation. Install a freestanding combined cooking product with the back directly against, or as near as possible to, a vertical wall which extends at least 1 foot above the appliance and 1 foot beyond both sides of the appliance, and with no side walls. Install a drop-in or built-in cooking product in a test enclosure in accordance with manufacturer's instructions. If the manufacturer's instructions specify that the cooking product may be used in multiple installation conditions, install the appliance according to the built-in configuration and, for cooking tops, with the back directly against, or as near as possible to, a vertical wall which extends at least 1 foot above the appliance and 1 foot beyond both sides of the appliance. Completely assemble the product with all handles, knobs, guards, and similar components mounted in place. Position any electric resistance heaters, gas burners, and baffles in accordance with the manufacturer's instructions.

2.1.1 Conventional electric cooking tops. Connect these products to an electrical supply circuit with voltage as specified in section 2.2.1 of this appendix with a watt-hour meter installed in the circuit. The watt-hour meter shall be as described in section 2.8.1.1 of this appendix. For standby mode and off mode testing, install these products in accordance with Section 5, Paragraph 5.2 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3), disregarding the provisions regarding batteries and the determination, classification, and testing of relevant modes.

2.1.2 Conventional gas cooking tops. Connect these products to a gas supply line with a gas meter installed between the supply line and the appliance being tested, according to manufacturer's specifications. The gas meter shall be as described in section 2.8.2 of this appendix. Connect conventional gas cooking tops with electrical ignition devices or other electrical components to an electrical supply circuit of nameplate voltage with a watt-hour meter installed in the circuit. The watt-hour meter shall be as described in section 2.8.1.1 of this appendix. For standby mode and off mode testing, install these products in accordance with Section 5, Paragraph 5.2 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3), disregarding the provisions regarding batteries and the determination, classification, and testing of relevant modes.

2.1.3 Microwave ovens, excluding any microwave oven component of a combined cooking product. Install the microwave oven in accordance with the manufacturer's instructions and connect to an electrical supply circuit with voltage as specified in section 2.2.1 of this appendix. Install the microwave oven also in accordance with Section 5, Paragraph 5.2 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3), disregarding the provisions regarding batteries and the determination, classification, and testing of relevant modes. A watt meter shall be installed in the circuit and shall be as described in section 2.8.1.2 of this appendix.

2.1.4 Combined cooking products standby mode and off mode. For standby mode and off mode testing of combined cooking products, install these products in accordance with Section 5, Paragraph 5.2 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3), disregarding the provisions regarding batteries and the determination, classification, and testing of relevant modes.

2.2 Energy supply.

2.2.1 Electrical supply.

2.2.1.1 Voltage. For the test of conventional cooking tops, maintain the electrical supply requirements specified in Section 5.2 of EN 60350-2:2013 (incorporated by reference; see § 430.3). For microwave oven testing, maintain the electrical supply to the unit at 240/120 volts ±1 percent. For combined cooking product standby mode and off mode measurements, maintain the electrical supply to the unit at 240/120 volts ±1 percent. Maintain the electrical supply frequency for all products at 60 hertz ±1 percent.

2.2.2.1 Gas burner adjustments. Test conventional gas cooking tops with all of the gas burners adjusted in accordance with the installation or operation instructions provided by the manufacturer. In every case, adjust the burner with sufficient air flow to prevent a yellow flame or a flame with yellow tips.

2.2.2.2 Natural gas. For testing convertible cooking appliances or appliances which are designed to operate using only natural gas, maintain the natural gas pressure immediately ahead of all controls of the unit under test at 7 to 10 inches of water column (1743.6 to 2490.8 Pa). The regulator outlet pressure shall equal the manufacturer's recommendation. The natural gas supplied should have a heating value of approximately 1,025 Btu per standard cubic foot (38.2 kJ/L). The actual gross heating value, Hn, in Btu per standard cubic foot (kJ/L), for the natural gas to be used in the test shall be obtained either from measurements made by the manufacturer conducting the test using equipment that meets the requirements described in section 2.8.4 of this appendix or by the use of bottled natural gas whose gross heating value is certified to be at least as accurate a value that meets the requirements in section 2.8.4 of this appendix.

2.2.2.3 Propane. For testing convertible cooking appliances with propane or for testing appliances which are designed to operate using only LP-gas, maintain the propane pressure immediately ahead of all controls of the unit under test at 11 to 13 inches of water column (2740 to 3238 Pa). The regulator outlet pressure shall equal the manufacturer's recommendation. The propane supplied should have a heating value of approximately 2,500 Btu per standard cubic foot (93.2 kJ/L). Obtain the actual gross heating value, Hp, in Btu per standard cubic foot (kJ/L), for the propane to be used in the test either from measurements made by the manufacturer conducting the test using equipment that meets the requirements described in section 2.8.4 of this appendix, or by the use of bottled propane whose gross heating value is certified to be at least as accurate a value that meets the requirements described in section 2.8.4 of this appendix.

2.2.2.4 Test gas. Test a basic model of a convertible cooking appliance with natural gas or propane. Test with natural gas any basic model of a conventional cooking top that is designed to operate using only natural gas as the energy source. Test with propane gas any basic model of a conventional cooking top which is designed to operate using only LP gas as the gas energy source.

2.3 Air circulation. Maintain air circulation in the room sufficient to secure a reasonably uniform temperature distribution, but do not cause a direct draft on the unit under test.

2.5 Ambient room test conditions

2.5.1 Active mode ambient room air temperature. During the active mode test for conventional cooking tops, maintain the ambient room air temperature and pressure specified in Section 5.1 of EN 60350-2:2013 (incorporated by reference; see § 430.3).

2.5.2 Standby mode and off mode ambient temperature. For standby mode and off mode testing, maintain room ambient air temperature conditions as specified in Section 4, Paragraph 4.2 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3).

2.6 Normal non-operating temperature. All areas of the appliance to be tested must attain the normal non-operating temperature, as defined in section 1.16 of this appendix, before any testing begins. Measure the applicable normal non-operating temperature using the equipment specified in sections 2.8.3.1 and 2.8.3.2 of this appendix. For conventional cooking tops, forced cooling may be used to assist in reducing the temperature of the appliance, as specified in Section 5.5 of EN 60350-2:2013 (incorporated by reference; see § 430.3).

2.7 Conventional cooking top test vessels

2.7.1 Conventional electric cooking top test vessels. The test vessels and water amounts required for the test of conventional electric cooking tops must meet the requirements specified in Section 7.1.Z2 of EN 60350-2:2013 (incorporated by reference; see § 430.3).

2.7.2 Conventional gas cooking top test vessels. The test vessels for conventional gas cooking tops must be constructed according to Section 7.1.Z2 of EN 60350-2:2013 (incorporated by reference; see § 430.3). Use the following test vessel diameters and water amounts to test gas cooking zones having the burner input rates as specified:

Nominal gas burner input rate Test vessel
diameter
inches (mm)
mass
lbs (kg)
Minimum
Btu/h (kW)
Maximum
Btu/h (kW)
3,958 (1.16) 5,596 (1.64) 8.27 (210) 4.52 (2.05)
5,630 (1.65) 6,756 (1.98) 9.45 (240) 5.95 (2.70)
6,790 (1.99) 8,053 (2.36) 10.63 (270) 7.54 (3.42)
8,087 (2.37) 14,331 (4.2) 10.63 (270) 7.54 (3.42)
>14,331 (4.2) 11.81 (300) 9.35 (4.24)

2.8 Instrumentation. Perform all test measurements using the following instruments, as appropriate:

2.8.1 Electrical Measurements.

2.8.1.1 Watt-hour meter. The watt-hour meter for measuring the electrical energy consumption of conventional cooking tops must have a resolution as specified in Table Z1 of Section 5.3 of EN 60350-2:2013 (incorporated by reference; see § 430.3). The watt-hour meter for measuring the electrical energy consumption of microwave ovens must have a resolution of 0.1 watt-hour (0.36 kJ) or less and a maximum error no greater than 1.5 percent of the measured value.

2.8.1.2 Standby mode and off mode watt meter. The watt meter used to measure standby mode and off mode power must meet the requirements specified in Section 4, Paragraph 4.4 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3). For microwave oven standby mode and off mode testing, if the power measuring instrument used for testing is unable to measure and record the crest factor, power factor, or maximum current ratio during the test measurement period, measure the crest factor, power factor, and maximum current ratio immediately before and after the test measurement period to determine whether these characteristics meet the requirements specified in Section 4, Paragraph 4.4 of IEC 62301 (Second Edition).

2.8.2 Gas Measurements.

2.8.2.1 Positive displacement meters. The gas meter to be used for measuring the gas consumed by the gas burners of the conventional cooking top must have a resolution of 0.01 cubic foot (0.28 L) or less and a maximum error no greater than 1 percent of the measured valued for any demand greater than 2.2 cubic feet per hour (62.3 L/h).

2.8.3 Temperature measurement equipment.

2.8.3.1 Room temperature indicating system. For the test of microwave ovens, the room temperature indicating system must have an error no greater than ±1 °F (±0.6 °C) over the range 65° to 90 °F (18 °C to 32 °C). For conventional cooking tops, the room temperature indicating system must be as specified in Table Z1 of Section 5.3 of EN 60350-2:2013 (incorporated by reference; see § 430.3).

2.8.3.2 Temperature indicator system for measuring surface temperatures. Measure the temperature of any surface of a conventional cooking top by means of a thermocouple in firm contact with the surface. The temperature indicating system must have an error no greater than ±1 °F (±0.6 °C) over the range 65° to 90 °F (18 °C to 32 °C).

2.8.3.3 Water temperature indicating system. For the test of conventional cooking tops, measure the test vessel water temperature by means of a thermocouple as specified in Table Z1 of Section 5.3 of EN 60350-2:2013 (incorporated by reference; see § 430.3).

2.8.3.4 Room air pressure indicating system. For the test of conventional cooking tops, the room air pressure indicating system must be as specified in Table Z1 of Section 5.3 of EN 60350-2:2013 (incorporated by reference; see § 430.3).

2.8.4 Heating Value. Measure the heating value of the natural gas or propane with an instrument and associated readout device that has a maximum error no greater than ±0.5% of the measured value and a resolution of ±0.2% or less of the full scale reading of the indicator instrument. Correct the heating value of natural gas or propane to standard pressure and temperature conditions in accordance with U.S. Bureau of Standards, circular C417, 1938.

2.8.5 Scale. The scale used to measure the mass of the water amount must be as specified in Table Z1 of Section 5.3 of EN 60350-2:2013 (incorporated by reference; see § 430.3).

3. Test Methods and Measurements

3.1. Test methods.

3.1.1 Conventional cooking top. Establish the test conditions set forth in section 2, Test Conditions, of this appendix. Turn off the gas flow to the conventional oven(s), if so equipped. The temperature of the conventional cooking top must be its normal non-operating temperature as defined in section 1.16 and described in section 2.6 of this appendix. For conventional electric cooking tops, select the test vessel(s) and test position(s) according to Sections 6.2.Z1, 7.1.Z2, 7.1.Z3, 7.1.Z4, Annex ZA to ZD, and Annex ZF of EN 60350-2:2013 (incorporated by reference; see § 430.3). When measuring the surface unit cooking zone diameter, the outer diameter of the cooking zone printed marking shall be used for the measurement. For conventional gas cooking tops, select the appropriate test vessel(s) from the test vessels specified in section 2.7.2 of this appendix based on the burner input rate. Use the test methods set forth in Section 7.1.Z6 of EN 60350-2:2013 to measure the energy consumption of electric and gas cooking zones and electric cooking areas. The temperature overshoot, ΔT0, calculated in Section 7.1.Z6.2.2 is the difference between the highest recorded temperature value and T70 as shown in Figure Z2. During the simmering energy consumption measurement specified in Section 7.1.Z6.3, the 20-minute simmering period starts when the water temperature first reaches 90 °C and does not drop below 90 °C for more than 20 seconds after initially reaching 90 °C. Do not test specialty cooking zones that are for use only with non-circular cookware, such as bridge zones, warming plates, grills, and griddles.

3.1.1.1 Conventional cooking top standby mode and off mode power except for any conventional cooking top component of a combined cooking product. Establish the standby mode and off mode testing conditions set forth in section 2, Test Conditions, of this appendix. For conventional cooking tops that take some time to enter a stable state from a higher power state as discussed in Section 5, Paragraph 5.1, Note 1 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3), allow sufficient time for the conventional cooking top to reach the lower power state before proceeding with the test measurement. Follow the test procedure as specified in Section 5, Paragraph 5.3.2 of IEC 62301 (Second Edition) for testing in each possible mode as described in sections 3.1.1.1.1 and 3.1.1.1.2 of this appendix. For units in which power varies as a function of displayed time in standby mode, set the clock time to 3:23 at the end of the stabilization period specified in Section 5, Paragraph 5.3 of IEC 62301 (First Edition), and use the average power approach described in Section 5, Paragraph 5.3.2(a) of IEC 62301 (First Edition), but with a single test period of 10 minutes +0/−2 sec after an additional stabilization period until the clock time reaches 3:33.

3.1.1.1.1 If the conventional cooking top has an inactive mode, as defined in section 1.14 of this appendix, measure and record the average inactive mode power of the conventional cooking top, PIA, in watts.

3.1.1.1.2 If the conventional cooking top has an off mode, as defined in section 1.17 of this appendix, measure and record the average off mode power of the conventional cooking top, POM, in watts.

3.1.2 Combined cooking product standby mode and off mode power. Establish the standby mode and off mode testing conditions set forth in section 2, Test Conditions, of this appendix. For combined cooking products that take some time to enter a stable state from a higher power state as discussed in Section 5, Paragraph 5.1, Note 1 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3), allow sufficient time for the combined cooking product to reach the lower power state before proceeding with the test measurement. Follow the test procedure as specified in Section 5, Paragraph 5.3.2 of IEC 62301 (Second Edition) for testing in each possible mode as described in sections 3.1.2.1 and 3.1.2.2 of this appendix. For units in which power varies as a function of displayed time in standby mode, set the clock time to 3:23 at the end of the stabilization period specified in Section 5, Paragraph 5.3 of IEC 62301 (First Edition), and use the average power approach described in Section 5, Paragraph 5.3.2(a) of IEC 62301 (First Edition), but with a single test period of 10 minutes +0/−2 sec after an additional stabilization period until the clock time reaches 3:33.

3.1.2.1 If the combined cooking product has an inactive mode, as defined in section 1.14 of this appendix, measure and record the average inactive mode power of the combined cooking product, PIA, in watts.

3.1.2.2 If the combined cooking product has an off mode, as defined in section 1.17 of this appendix, measure and record the average off mode power of the combined cooking product, POM, in watts.

3.1.3 Microwave oven.

3.1.3.1 Microwave oven test standby mode and off mode power except for any microwave oven component of a combined cooking product. Establish the testing conditions set forth in section 2, Test Conditions, of this appendix. For microwave ovens that drop from a higher power state to a lower power state as discussed in Section 5, Paragraph 5.1, Note 1 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3), allow sufficient time for the microwave oven to reach the lower power state before proceeding with the test measurement. Follow the test procedure as specified in Section 5, Paragraph 5.3.2 of IEC 62301 (Second Edition). For units in which power varies as a function of displayed time in standby mode, set the clock time to 3:23 and use the average power approach described in Section 5, Paragraph 5.3.2(a) of IEC 62301 (First Edition), but with a single test period of 10 minutes +0/−2 sec after an additional stabilization period until the clock time reaches 3:33. If a microwave oven is capable of operation in either standby mode or off mode, as defined in sections 1.19 and 1.17 of this appendix, respectively, or both, test the microwave oven in each mode in which it can operate.

3.2 Test measurements.

3.2.1 Conventional cooking top test energy consumption.

3.2.1.1 Conventional cooking area or cooking zone energy consumption. Measure the energy consumption for each electric cooking zone and cooking area, in watt-hours (kJ) of electricity according to section 7.1.Z6.3 of EN 60350-2:2013 (incorporated by reference; see § 430.3). For the gas surface unit under test, measure the volume of gas consumption, VCT, in standard cubic feet (L) of gas and any electrical energy, EIC, consumed by an ignition device of a gas heating element or other electrical components required for the operation of the conventional gas cooking top in watt-hours (kJ).

3.2.1.2 Conventional cooking top standby mode and off mode power except for any conventional cooking top component of a combined cooking product. Make measurements as specified in section 3.1.1.1 of this appendix. If the conventional cooking top is capable of operating in inactive mode, as defined in section 1.15 of this appendix, measure the average inactive mode power of the conventional cooking top, PIA, in watts as specified in section 3.1.1.1.1 of this appendix. If the conventional cooking top is capable of operating in off mode, as defined in section 1.17 of this appendix, measure the average off mode power of the conventional cooking top, POM, in watts as specified in section 3.1.1.1.2 of this appendix.

3.2.2 Combined cooking product standby mode and off mode power. Make measurements as specified in section 3.1.2 of this appendix. If the combined cooking product is capable of operating in inactive mode, as defined in section 1.15 of this appendix, measure the average inactive mode power of the combined cooking product, PIA, in watts as specified in section 3.1.2.1 of this appendix. If the combined cooking product is capable of operating in off mode, as defined in section 1.17 of this appendix, measure the average off mode power of the combined cooking product, POM, in watts as specified in section 3.1.2.2 of this appendix.

3.2.3 Microwave oven standby mode and off mode power except for any microwave oven component of a combined cooking product. Make measurements as specified in Section 5, Paragraph 5.3 of IEC 62301 (Second Edition) (incorporated by reference; see § 430.3). If the microwave oven is capable of operating in standby mode, as defined in section 1.19 of this appendix, measure the average standby mode power of the microwave oven, PSB, in watts as specified in section 3.1.3.1 of this appendix. If the microwave oven is capable of operating in off mode, as defined in section 1.17 of this appendix, measure the average off mode power of the microwave oven, POM, as specified in section 3.1.3.1.

3.3 Recorded values.

3.3.1 Record the test room temperature, TR, at the start and end of each conventional cooking top or combined cooking product test, as determined in section 2.5 of this appendix.

3.3.2 Record the relative air pressure at the start of the test and at the end of the test in hectopascals (hPa).

3.3.3 For conventional cooking tops and combined cooking products, record the standby mode and off mode test measurements PIA and POM, if applicable.

3.3.4 For each test of an electric cooking area or cooking zone, record the values listed in 7.1.Z6.3 in EN 60350-2:2013 (incorporated by reference; see § 430.3) and the total test electric energy consumption, ETV.

3.3.5 For each test of a conventional gas surface unit, record the gas volume consumption, VCT; the time until the power setting is reduced, tc; the time when the simmering period starts, t90; the initial temperature of the water; the water temperature when the setting is reduced, Tc; the water temperature at the end of the test, Ts; and the electrical energy for ignition of the burners, EIC.

3.3.6 Record the heating value, Hn, as determined in section 2.2.2.2 of this appendix for the natural gas supply.

3.3.7 Record the heating value, Hp, as determined in section 2.2.2.3 of this appendix for the propane supply.

3.3.8 Record the simmering setting selected in accordance with section 7.1.Z6.2.3.

3.3.9 For microwave ovens except for any microwave oven component of a combined cooking product, record the average standby mode power, PSB, for the microwave oven standby mode, as determined in section 3.2.3 of this appendix for a microwave oven capable of operating in standby mode. Record the average off mode power, POM, for the microwave oven off mode power test, as determined in section 3.2.3 of this appendix for a microwave oven capable of operating in off mode.

4. Calculation of Derived Results From Test Measurements

4.1 Conventional cooking top.

4.1.1 Conventional cooking top energy consumption.

4.1.1.1 Energy consumption for electric cooking tops. Calculate the energy consumption of a conventional electric cooking top, ECTE, in Watt-hours (kJ), using the following equation:

${E}_{\mathrm{CTE}}=\frac{2853g}{{n}_{\mathrm{tv}}}×\sum _{\mathrm{tv}=1}^{{n}_{\mathrm{tv}}}\frac{{E}_{\mathrm{tv}}}{{m}_{\mathrm{tv}}}$

Where:
ntv = the total number of tests conducted for the conventional electric cooking top
Etv = the energy consumption measured for each test with a given test vessel, tv, in Wh
mtv is the mass of water used for the test, in g
2853 = the representative water load mass, in g

4.1.1.2 Gas energy consumption for conventional gas cooking tops. Calculate the energy consumption of the conventional gas cooking top, ECTG, in Btus (kJ) using the following equation:

${E}_{\mathrm{CTG}}=\frac{2853g}{{n}_{\mathrm{tv}}}×\sum _{\mathrm{tv}=1}^{{n}_{\mathrm{tv}}}\frac{{E}_{\mathrm{tvg}}}{{m}_{\mathrm{tv}}}$

Where:
ntv = the total number of tests conducted for the conventional gas cooking top
mtv = the mass of the water used to test a given cooking zone or area
Etvg = (VCT × H), the gas energy consumption measured for each test with a given test vessel, tv, in Btu (kJ)
Where:
VCT = total gas consumption in standard cubic feet (L) for the gas surface unit test as measured in section 3.2.1.1 of this appendix.
H = either Hn or Hp, the heating value of the gas used in the test as specified in sections 2.2.2.2 and 2.2.2.3 of this appendix, expressed in Btus per standard cubic foot (kJ/L) of gas.
2853 = the representative water load mass, in g

4.1.1.3 Electrical energy consumption for conventional gas cooking tops. Calculate the energy consumption of the conventional gas cooking top, ECTGE, in Watt-hours (kJ) using the following equation:

${E}_{\mathrm{CTGE}}=\frac{2853g}{{n}_{\mathrm{tv}}}×\sum _{\mathrm{tv}=1}^{{n}_{\mathrm{tv}}}\frac{{E}_{IC}}{{m}_{\mathrm{tv}}}$

Where:
ntv = the total number of tests conducted for the conventional gas cooking top
mtv = the mass of the water used to test a given cooking zone or area
EIC = the electrical energy consumed in watt-hours (kJ) by a gas surface unit as measured in section 3.2.1.1 of this appendix.
2853 = the representative water load mass, in g

4.1.2 Conventional cooking top annual energy consumption.

4.1.2.1 Conventional electric cooking top.

4.1.2.1.1 Annual energy consumption of a conventional electric cooking top. Calculate the annual energy consumption of a conventional electric cooking top, ECA, in kilowatt-hours (kJ) per year, defined as:

ECA = ECTE × K × NCE
Where:
K = 0.001 kWh/Wh conversion factor for watt-hours to kilowatt-hours.
NCE = 207.5 cooking cycles per year, the average number of cooking cycles per year normalized for duration of a cooking event estimated for conventional electric cooking tops.
ECTE = energy consumption of the conventional electric cooking top as defined in section 4.1.1.1 of this appendix.

4.1.2.1.2 Integrated annual energy consumption of a conventional electric cooking top. Calculate the integrated annual electrical energy consumption, EIAEC, of a conventional electric cooking top, except for any conventional electric cooking top component of a combined cooking product, in kilowatt-hours (kJ) per year, defined as:

E1AEC = ECA + ECTLP
Where:
ECA = the annual energy consumption of the conventional electric cooking top as defined in section 4.1.2.1.1 of this appendix.
ECTLP = conventional cooking top annual combined low-power mode energy consumption = [(PIA × SIA) + (POM × SOM)] × K,

Where:

PIA = conventional cooking top inactive mode power, in watts, as measured in section 3.1.1.1.1 of this appendix.

POM = conventional cooking top off mode power, in watts, as measured in section 3.1.1.1.2 of this appendix.

If the conventional cooking top has both inactive mode and off mode annual hours, SIA and SOM both equal 4273.4;

If the conventional cooking top has an inactive mode but no off mode, the inactive mode annual hours, SIA, is equal to 8546.9, and the off mode annual hours, SOM, is equal to 0;

If the conventional cooking top has an off mode but no inactive mode, SIA is equal to 0, and SOM is equal to 8546.9;

K = 0.001 kWh/Wh conversion factor for watt-hours to kilowatt-hours.

4.1.2.2 Conventional gas cooking top

4.1.2.2.1 Annual gas energy consumption of a conventional gas cooking top. Calculate the annual gas energy consumption, ECCG, in kBtus (kJ) per year for a conventional gas cooking top, defined as:

ECCG = ECTG × K × NCG
Where:
NCG = 214.5 cooking cycles per year, the average number of cooking cycles per year normalized for duration of a cooking event estimated for conventional gas cooking tops.
ECTG = gas energy consumption of the conventional gas cooking top as defined in section 4.1.1.2 of this appendix.
K = 0.001 conversion factor for Btu to kBtu.

4.1.2.2.2 Annual electrical energy consumption of a conventional gas cooking top. Calculate the annual electrical energy consumption, ECCE, in kilowatt-hours (kJ) per year for a conventional gas cooking top, defined as:

ECCE = ECTGE × K × NCG
Where:
NCG = 214.5 cooking cycles per year, the average number of cooking cycles per year normalized for duration of a cooking event estimated for conventional gas cooking tops.
ECTGE = secondary electrical energy consumption of the conventional gas cooking top as defined in section 4.1.1.3 of this appendix.
K = 0.001 conversion factor for Wh to kWh.

4.1.2.2.3 Integrated annual energy consumption of a conventional gas cooking top. Calculate the integrated annual energy consumption, EIAEC, of a conventional gas cooking top, except for any conventional gas cooking top component of a combined cooking product, in kBtus (kJ) per year, defined as:

E1AEC = ECC + (ECTSO × Ke)
Where:
ECC = ECCG + (ECCE × Ke) the total annual energy consumption of a conventional gas cooking top

Where:

ECCG = the primary annual energy consumption of a conventional gas cooking top as determined in section 4.1.2.2.1 of this appendix.

ECCE = the secondary annual energy consumption of a conventional gas cooking top as determined in section 4.1.2.2.2 of this appendix.

Ke = 3.412 Btu/Wh (3.6 kJ/Wh), conversion factor of watt-hours to Btus.

ECTSO = conventional cooking top annual combined low-power mode energy consumption = [(PIA × SIA) + (POM × SOM)] × K,

Where:

PIA = conventional cooking top inactive mode power, in watts, as measured in section 3.1.1.1.1 of this appendix.

POM = conventional cooking top off mode power, in watts, as measured in section 3.1.1.1.2 of this appendix.

If the conventional cooking top has both inactive mode and off mode annual hours, SIA and SOM both equal 4273.4;

If the conventional cooking top has an inactive mode but no off mode, the inactive mode annual hours, SIA, is equal to 8546.9, and the off mode annual hours, SOM, is equal to 0;

If the conventional cooking top has an off mode but no inactive mode, SIA is equal to 0, and SOM is equal to 8546.9;

K = 0.001 kWh/Wh conversion factor for watt-hours to kilowatt-hours.

4.2 Combined cooking products.

4.2.1 Combined cooking product annual combined low-power mode energy consumption. Calculate the combined cooking product annual combined low-power mode energy consumption, ECCLP, defined as:

ECCLP = (PIA × SIA) + (POM × SOM)] × K,
Where:
PIA = combined cooking product inactive mode power, in watts, as measured in section 3.1.2.1 of this appendix.
POM = combined cooking product off mode power, in watts, as measured in section 3.1.2.2 of this appendix.
STOT equals the total number of inactive mode and off mode hours per year, 8,329.2;
If the combined cooking product has both inactive mode and off mode, SIA and SOM both equal STOT/2;
If the combined cooking product has an inactive mode but no off mode, the inactive mode annual hours, SIA, is equal to STOT, and the off mode annual hours, SOM, is equal to 0;

If the combined cooking product has an off mode but no inactive mode, SIA is equal to 0, and SOM is equal to STOT;

K = 0.001 kWh/Wh conversion factor for watt-hours to kilowatt-hours.

4.2.2 Integrated annual energy consumption of any conventional cooking top component of a combined cooking product.

4.2.2.1 Integrated annual energy consumption of any conventional electric cooking top component of a combined cooking product. Calculate the integrated annual energy consumption of a conventional electric cooking top component of a combined cooking product, EIAEC, in kilowatt-hours (kJ) per year and defined as:

EIAEC = ECA + ECCTLP
Where,
ECA = the annual energy consumption of the conventional electric cooking top as defined in section 4.1.2.1.1 of this appendix.
ECCTLP = annual combined low-power mode energy consumption for the conventional cooking top component of a combined cooking product, in kWh (kJ) per year, calculated as:

${E}_{\mathrm{CCTLP}}={E}_{\mathrm{CCLP}}×\frac{{H}_{\mathrm{CT}}}{{H}_{T}}$

Where:
ECCLP = combined cooking product annual combined low-power mode energy consumption, determined in section 4.2.1 of this appendix.
HCT = 213.1 hours per year, the average number of cooking hours per year for a conventional cooking top.

HT = HOV + HCT + HMWO

Where:

HOV = average number of cooking hours per year for a conventional oven, which is equal to 219.9 hours per year. If the combined cooking product does not include a conventional oven, then HOV = 0.

HMWO = average number of cooking hours per year for a microwave oven, which is equal to 44.9 hours per year. If the combined cooking product does not include a microwave oven, then HMWO = 0.

4.2.2.2 Integrated annual energy consumption of any conventional gas cooking top component of a combined cooking product. Calculate the integrated annual energy consumption of a conventional gas cooking top component of a combined cooking product, EIAEC, in kBtus (kJ) per year and defined as:

EIAEC = ECC + (ECCTLP × Ke)
Where,
ECC = ECCG + ECCE, the total annual energy consumption of a conventional gas cooking top,

Where:

ECCG = the annual gas energy consumption of a conventional gas cooking top as determined in section 4.1.2.2.1 of this appendix.

ECCE = the annual electrical energy consumption of a conventional gas cooking top as determined in section 4.1.2.2.2 of this appendix.

Ke = 3.412 kBtu/kWh (3,600 kJ/kWh), conversion factor for kilowatt-hours to kBtus.
ECCTLP = annual combined low-power mode energy consumption for the conventional cooking top component of a combined cooking product, in kWh (kJ) per year, calculated as:

${E}_{\mathrm{CCTLP}}={E}_{\mathrm{CCLP}}×\frac{{H}_{\mathrm{CT}}}{{H}_{T}}$

Where:
ECCLP = combined cooking product annual combined low-power mode energy consumption, determined in section 4.2.1 of this appendix.
HCT = 213.1 hours per year, the average number of cooking hours per year for a conventional cooking top.
HT = HOV + HCT + HMWO

Where:

HOV = average number of cooking hours per year for a conventional oven, which is equal to 219.9 hours per year. If the combined cooking product does not include a conventional oven, then HOV = 0.

HMWO = average number of cooking hours per year for a microwave oven, which is equal to 44.9 hours per year. If the combined cooking product does not include a microwave oven, then HMWO = 0.

4.2.3 Annual combined low-power mode energy consumption for any microwave oven component of a combined cooking product. Calculate the annual combined low-power mode energy consumption of a microwave oven component of a combined cooking product, ECMWOLP, in kWh (kJ) per year, and defined as:

${E}_{\mathrm{CMWOLP}}={E}_{\mathrm{CCLP}}×\frac{{H}_{\mathrm{MWO}}}{{H}_{T}}$

Where:
ECCLP = combined cooking product annual combined low-power mode energy consumption, determined in section 4.2.1 of this appendix.
HMWO = 44.9 hours per year, the average number of cooking hours per year for a microwave oven.
HT = HOV + HCT + HMWO

Where:

HOV = average number of cooking hours per year for a conventional oven, which is equal to 219.9 hours per year. If the combined cooking product does not include a conventional oven, then HOV = 0.

HCT = average number of cooking hours per year for a conventional cooking top, which is equal to 213.1 hours per year. If the combined cooking product does not include a conventional cooking top, then HCT = 0.

[81 FR 91447, Dec. 16, 2016]