CHAPTER 9. TRIAL STANDARD LEVELS

TABLE OF CONTENTS
9 .1 INTRODUCTION

........................................................................................................... 9-1 9.2 COOKTOPS AND OVENS

............................................................................................ 9-1 9.3 MICROWAVE OVENS

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LIST OF TABLES Table 9.2.1 Trial Standard Levels for Cooktops and Ovens

................................................... 9-2 Table 9.3.1 Trial Standard Levels for Microwave Oven EF

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9-iCHAPTER 9. TRIAL STANDARD LEVELS

9.1 INTRODUCTION DOE generated NES and NPV results based on trial standard levels (TSLs). The TSLs are based on the following: (1) candidate standard (efficiency) levels identified in the Advance Notice of Proposed Rulemaking (ANOPR) published in November 15, 2007, 1 (2) the candidate standard level identified with the maximum ef ficiency, and (3) a combination of candidate standard levels for different equipment classes that have potentially positi ve impacts on consumers and the Nation. The technical support document (TSD) for DOE’s notice of proposed rulemaking (NOPR) covered conventional cooking products (i.e., cooktops and ovens), microwave oven energy factor (EF), microwave oven standby power consumption, and commercial clothes washers (CCW). 2 This chapter presents information and results pertaining solely to conventional cooking products and microwave oven EF. Th e impact of more-efficient equipment on microwave oven standby power and CCWs w ill be addressed in subsequent TSDs.

9.2 COOKTOPS AND OVENS Table 9.2.1 shows the TSLs for conventional co oking products. As discussed in Chapter 4, Screening Analysis, DOE conducts a screening an alysis to determine the design options that are technologically feasible and can be consider ed as measures to improve product efficiency. However, there are few design options availabl e for improving the efficiency of these cooking products due to physical limitations on energy transfer to the food loa d. This is particularly the case for all cooktop and self-clean ing oven product classes. For el ectric cooktops, DOE was able to identify only a single design change for analysis. For gas cookt ops and electric self-cleaning ovens, DOE was able to identify two design optio ns for analysis. And for gas self-cleaning ovens, DOE was able to identify three design op tions for analysis. Although DOE considered several design options for standardovens, with the exception of eliminating standing pilots for gas standard ovens, none significan tly increased product efficienc y. Specifically, eliminating standing pilots reduces overall gas consumption by over 50 percent while all other design options reduce gas consumption by approximately two percent. Therefore, DOE gave further consideration to only four TSLs for conventional cooking products. TSL 1 represents the elimination of standi ng pilot ignition systems from gas cooking products. All other product classes are unaffect ed by TSL 1, including gas self-cleaning ovens, which are not allowed to use standing pilot igniti on systems because they already use electricity and come equipped with power cords to enable the self-cleaning cycle. Under TSL 1, DOE’s current prescriptive standard of disallowing the use of standing pilot ignition systems in gas cooking pilots equipped with power cords would be extended to all gas cooking products, regardless of whether the appliance is equippe d with a power cord. Also, under TSL 1, there

9-1would be no need for DOE to regulate the EF of any of the conventiona l cooking product classes because only standing pilot igni tion systems are being affected. TSL 2 for conventional cooking products consists of the candidate standard levels from each of the product classes that provide a majo rity of consumers (who are impacted by the standard) with an economic benefit. Based on this criterion, only electric coil cooktops and electric standard ovens have candidate standard le vels that differ from those in TSL 1. In other words, for the remaining five product classes (e lectric smooth cooktops, el ectric self-cleaning ovens, and all gas cooking product classes), anal ytical results indicate there is no candidate standard level that provides an economi c benefit to a majority of consumers. TSL 3 for conventional cooking pr oducts consists of the same candidate standard levels as TSL 2, with the exception of the gas self-clean ing oven product class. For gas self-cleaning ovens, the design option that provides, on aver age, a small level of economic benefit to consumers is included. TSL 4 is the maximum technologically feasible level. Table 9.2.1 summarizes the four TS Ls for cooktops and ovens. Table 9.2.1 Trial Standard Levels for Cooktops and Ovens Trial standard levels (EF) Product classes TSL 1 TSL 2 TSL 3 TSL 4 Electric Coil Cooktops No Standard 0.769 0.769 0.769 Electric Smooth Cooktops No Standard No Standard No Standard 0.753 Gas Cooktops No Pilot No Pilot No Pilot 0.420 Electric Standard Ovens No Standard 0.1163 0.1163 0.1209 Electric Self-Cleaning Ovens No Standard No Standard No Standard 0.1123 Gas Standard Ovens No Pilot No Pilot No Pilot 0.0600 Gas Self-Cleaning Ovens No New Standard* No New Standard* 0.0625 0.0632 * Gas self-cleaning ovens are alread y required to use pilotle ss ignition systems because they are equipped with

power cords.

9.3 MICROWAVE OVENS Table 9.3.1 shows the TSLs for the regulati on of cooking efficiency or EF. TSLs 1 though 4 correspond to candidate standardlevels 1 through 4, respectively.

9-2Table 9.3.1 Trial Standard Levels for Microwave Oven EF Trial standard levels TSL 1 TSL 2 TSL 3 TSL 4 EF 0.586 0.588 0.597 0.602

9-3REFERENCES

1 U.S. Department of Energy-Office of En ergy Efficiency and Re newable Energy, Energy Conservation Program: Energy Conservation Standards for Certain Consumer Products (Dishwashers, Dehumidifiers, Electric and Ga s Kitchen Ranges and Ovens, and Microwave Ovens) and for Certain Comm ercial and Industrial Equipment (Commercial Clothes Washers); Advance Notice of Proposed Ru lemaking and Notice of Public Meeting . Federal Register , 2007. 72(220): pp. 64432-64515.

2 U.S. Department of Energy-Office of Energy Efficiency and Renewable Energy. Technical Support Document: Energy Efficiency Program for Consumer Products and Commercial and Industrial Equipment: Residential Dishwa shers, Dehumidifiers, Cooking Products, and Commercial Clothes Washers , September, 2008. Washington, DC. < http://www1.eere.energy.gov/buildings/appliance_ standards/residential/home_appl_tsd.html >

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