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Federal Register / Vol. 86, No. 153 / Thursday, August 12, 2021 / Proposed Rules For the June 2013 Final Rule, DOE
used a methodology consistent with the national impact analysis to calculate the energy savings from each EL.
1. Product Efficiency Trends A key component of the national energy savings analysis is the trend in energy efficiency projected for the nonew-standards case and each of the standards cases. To accurately estimate
the share of consumers that would be affected by a potential energy conservation standard at a particular efficiency level, DOEs analysis considered the projected distribution market shares of product efficiencies under the no-new-standards case i.e., the case without amended or new energy conservation standards.
To estimate the energy efficiency distribution for microwave oven
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standby power, DOE used the same methodology as presented in the June 2013 Final Rule TSD and updated the model counts from the Compliance Certification Management System. The estimated market shares for the no-newstandards case for microwave ovens are shown in Table IV6. See chapter 8 of the June 2013 Final Rule TSD for further information on the derivation of the efficiency distributions.

TABLE IV6EFFICIENCY DISTRIBUTIONS: NO-NEW-STANDARDS-CASE MARKET SHARES IN 2019
Microwave-only and countertop convection microwave ovens Standby power W

Standard level Baseline
1

For the standards cases, DOE used a roll-up scenario to establish the shipment-weighted efficiency for the year that standards are assumed to become effective. In this scenario, the market shares of products in the nonew-standards case that do not meet the standard under consideration would roll up to meet the new standard level, and the market share of products above the standard would remain unchanged.

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2. National Energy Savings The NES analysis involves a comparison of national energy consumption of the considered products between each potential standards case and the case with no new or amended energy conservation standards. DOE
calculated the national energy consumption by multiplying the number of units stock of each product by vintage or age by the unit energy consumption also by vintage. DOE
calculated annual NES based on the difference in national energy consumption for the no-new-standards case and for each higher efficiency standard case. DOE estimated energy consumption and savings based on site energy and converted the electricity consumption and savings to primary energy i.e., the energy consumed by power plants to generate site electricity using annual conversion factors derived from the U.S. Energy Information Administrations Annual Energy Outlook 2019. 11 Cumulative energy savings are the sum of the NES for each year over the timeframe of the analysis.
11 U.S. Energy Information Administration, Annual Energy Outlook 2019. https www.eia.gov/
outlooks/archive/aeo19/.

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Built-in and over-the-range convection microwave ovens Market share %

1.00
0.84

78.38
21.62

F. Life-Cycle Cost and Payback Period Analysis In evaluating cost-effectiveness, DOE
typically conducts life-cycle cost LCC and payback period PBP
analyses to evaluate the economic impacts on individual consumers of potential energy conservation standards for microwave ovens. The effect of new or amended energy conservation standards on individual consumers usually involves a reduction in operating cost and an increase in purchase cost. DOE uses the following two metrics to measure consumer impacts:
The LCC is the total consumer expense of an appliance or product over the life of that product, consisting of total installed cost manufacturer selling price, distribution chain markups, sales tax, and installation costs plus operating costs expenses for energy use, maintenance, and repair. To compute the operating costs, DOE discounts future operating costs to the time of purchase and sums them over the lifetime of the product.
The PBP is the estimated amount of time in years it takes consumers to recover the increased purchase cost including installation of a moreefficient product through lower operating costs. DOE calculates the PBP
by dividing the change in purchase cost at higher efficiency levels by the change in annual operating cost for the year that amended or new standards are assumed to take effect.
For any given efficiency level, DOE
measures the change in LCC relative to the LCC in the no-new-standards case, which reflects the estimated efficiency distribution of microwave ovens in the
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Standard level Baseline
1
2

Standby power W
2.20
1.16
1.00

Market share %
81.25
0.00
18.75

absence of new or amended energy conservation standards. In contrast, the PBP for a given efficiency level is measured relative to the baseline product.
One input to the LCC analysis is the repair and maintenance cost. AHAM
stated that LED and liquid crystal display LCD technologies are more expensive and could result in higher repair and maintenance costs for the consumer. AHAM, No. 6 at p. 6 AHAM
also stated that LED and LCD displays have lower reliability compared to vacuum fluorescent displays VFDs, especially in high temperature over-therange conditions. AHAM, No. 6 at p. 5
GE Appliances stated that there are no existing over-the-range microwave ovens using LCD technology due to extreme temperature conditions. They also indicated that previous GE
Appliances over-the-range microwave ovens with an LCD screen are no longer being produced due to quality issues related to LCD screen heat exposure.
GE Appliances, No. 5 at p. 2
As discussed in section V of this document, DOE has initially determined that the amended energy conservation standards for microwave ovens would not result in significant energy savings as required by EPCA. As such, DOE did not conduct the LCC and PBP analyses.
Therefore, DOE considers the comments from AHAM and GE Appliances regarding the repair costs related to LED
and LCD technologies moot.
V. Conclusions As required by EPCA, this NOPD
analyzes whether the Secretary should issue a notification of determination not to amend standards for microwave ovens based on DOEs consideration of
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