TECHNICAL SUPPORT DOCUMENT

Impacts on the Nation of the 

Energy Independence and Security Act of 2007

March 2009 
Table of Contents 

1 INTRODUCTION .................................................................................................................. 1

1.1 PURPOSE OF THE DOCUMENT................................................................................. 1 

1.2 OVERVIEW OF STANDARDS PRESCRIBED IN THE ENERGY SECURITY 

INDEPENDENCE ACT OF 2007 .............................................................................................. 1 

1.3 GENERAL APPROACH................................................................................................ 2 

1.4 SOURCES FOR SAVINGS ........................................................................................... 3 

1.5 PRODUCTS NOT CONSIDERED IN THE ANALYSIS ............................................. 4 

2 ENERGY CONSERVATION STANDARDS PRESCRIBED BY EISA 2007..................... 7 

2.1 INTRODUCTION .......................................................................................................... 7 

2.2 BASELINE EFFICIENCY LEVELS ............................................................................. 7 

2.3 EISA 2007 STANDARDS............................................................................................ 12 

3 ENERGY SAVINGS ESTIMATES ..................................................................................... 17 

3.1 INTRODUCTION ........................................................................................................ 17 

3.2 ENERGY SAVINGS ESTIMATES ............................................................................. 17 

3.3 ASSUMPTIONS........................................................................................................... 24 

3.4 ENERGY SAVINGS RESULTS.................................................................................. 25 

4 NET PRESENT VALUE ANALYSIS ................................................................................. 26 

4.1 INTRODUCTION ........................................................................................................ 26 

4.2 NET PRESENT VALUE ESTIMATES....................................................................... 26 

4.3 ASSUMPTIONS........................................................................................................... 30 

4.4 NET PRESENT VALUE RESULTS............................................................................ 31 

5 EMISSIONS REDUCTION ANALYSIS............................................................................. 32 

5.1 INTRODUCTION ........................................................................................................ 32 

5.2 EMISSIONS REDUCTIONS ESTIMATES ................................................................ 33 

5.3 EMISSIONS REDUCTIONS RESULTS..................................................................... 35 

i 
1 INTRODUCTION 

1.1 PURPOSE OF THE DOCUMENT 

This document provides analysis supporting the technical amendment incorporating the 

Energy Independence and Security Act of 2007 (EISA 2007) (Pub. L. 110-140) requirements 

into the Code of Federal Regulations. In this report, the Department of Energy (DOE) estimates 

the energy, economic, and environmental impacts of the energy conservation standards 

prescribed in EISA 2007 for certain consumer products and commercial and industrial 

equipment. 

Chapter 2 outlines the baseline efficiency levels as well as the new energy conservation 

standards for standards prescribed in EISA 2007. Chapters 3, 4, and 5 outline the methodology and 

results for the energy, economic, and emissions savings analyses. 

1.2 OVERVIEW OF STANDARDS PRESCRIBED IN THE ENERGY 

SECURITY INDEPENDENCE ACT OF 2007 

On December 19, 2007, Congress enacted EISA 2007, which amends the Energy Policy 

Conservation Act of 1975, Pub. L. 94-163 (42 U.S.C. 6291 et seq.) to establish energy 

conservation standards for certain consumer products and commercial and industrial equipment. 

In today’s technical amendment, DOE placed the prescribed energy conservation standards and 

related definitions into 10 CFR Part 430 (“Energy Conservation Program for Consumer 

Products”) or 10 CFR Part 431 (“Energy Efficiency Program for Certain Commercial and 

Industrial Equipment”) depending on the nature or type of the product or equipment. 

In accordance with Executive Order 12866, DOE estimated the impacts of standards on 

products and equipment prescribed by EISA 2007 (Table 1.1). In this report, DOE provides 

benefit analyses of the prescribed standards. 

Table 1.1 EISA 2007 Prescribed Energy Conservation Standards 

Product 

Dishwashers 

Residential Clothes Washers 

Dehumidifiers 

External Power Supplies, Class A 

Incandescent Reflector Lamps 

General Service Incandescent Lamps 

Candelabra Base Incandescent Lamps 

1 
Product 

Intermediate Base Incandescent Lamps 

Metal Halide Lamp Fixtures 

Electric Motors 

Small commercial Package Air-Conditioning and Heating Equipment 

Single Package Vertical Air-Conditioners and Heat Pumps 

Walk-In Coolers and Walk-In Freezers 

Residential Boilers 

Although standards for residential boilers are in EISA 2007, the standards were not codified 

in today’s technical amendment. Instead, the prescribed standards for residential boilers are 

included in the Furnace and Boiler Technical Amendment, published in the Federal Register on 

July 28, 2008 (73 FR 43611). 

1.3 GENERAL APPROACH 

 DOE analyzed four criteria to estimate the benefits of the prescribed standards: 

 cumulative energy savings (Quads) 

 increased total installed cost ($2007) 

 net present value ($2007) 

 emissions reductions (MMTCE)1

Where possible, DOE used available data from prior rulemaking analyses to provide benefit 

estimates. The benefit estimates consider the difference between typical baseline product models 

and product models that comply with the new EISA 2007 prescribed standard. Before EISA 

2007, DOE completed or began the rulemaking process and conducted preliminary benefit 

analyses for some of the products that were prescribed standards. 

When DOE did not already have data, DOE gathered data on shipments or installed 

equipment stock, baseline efficiency levels, and typical product usage to determine energy 

savings benefits of the prescribed standards. In most cases, DOE assumed the Federal minimum 

energy conservation standard as the baseline efficiency level. 

To determine cost benefits of products with no previous analyses, DOE analyzed the 

approximate changes in retail price of products that comply with EISA 2007. DOE also considered 

the energy cost savings associated with consuming less energy. DOE determined the emissions 

 

1

 Million metric tons of carbon equivalent includes only energy consumption effects, unless otherwise noted. 

Source: 2007 Building Energy Databook, U.S. Department of Energy, Office of Planning, Budget Formulation and 

Analysis, Energy Efficiency and Renewable Energy. September 2007.

2 
savings by estimating the reduction of carbon dioxide (CO2) from decreased energy consumption. 

Lastly, DOE discusses the monetary savings associated with a decrease of carbon emissions. 

DOE analyzed all standards over a single time period, 20082038. The analysis started in 

2008, the effective date of the earliest standard in EISA 2007 (class A external power supplies). 

DOE converted all cost data to 2007 dollars. 

1.4 SOURCES FOR SAVINGS 

Before EISA 2007, DOE completed or began the standards rulemaking process for 

residential boilers, dishwashers, dehumidifiers, and incandescent reflector lamps and was also 

working on the advance notice of proposed rulemaking for general service incandescent lamps, 

incandescent reflector lamps and general service fluorescent lamps. General service incandescent 

lamps were removed from this rulemaking after EISA 2007. Table 1.2 lists the products for 

which DOE had prior analysis when it began. 

Table 1.2 Products for Which DOE Has Prior Analysis 

Product Data Source Rulemaking 

Stage TSD Location Date of Data Release 

Residential 

Boilers 

Furnace and 

Boiler 

Rulemaking 

Technical 

Support 

Document (TSD) 

Final rule www.eere.energy.g

ov/buildings/applia

nce_standards/resid

ential/fb_tsd_0907.

html 

September 2007 

Residential 

Dishwashers 

AHAM 1 

Rulemaking TSD 

Draft Analysis – 

NIA Spreadsheet 

Framework 

document 

www.eere.energy.g

ov/buildings/applia

nce_standards/resid

ential/home_appl_t

sd.html 

November 2007 

Dehumidifiers AHAM 1 

Rulemaking TSD 

Draft Analysis – 

NIA Spreadsheet 

Framework 

document 

www.eere.energy.g

ov/buildings/applia

nce_standards/resid

ential/home_appl_t

sd.html 

November 2007 

Incandescent 

Reflector 

Lamps 

Lighting 

Rulemaking TSD 

Advanced 

notice of 

proposed rule 

www.eere.energy.g

ov/buildings/applia

nce_standards/resid

ential/incandescent

_lamps_anopr.html 

March 2008 

For some products, such as class-A external power supplies and walk-in coolers and freezers, 

DOE or another source conducted prior analyses that were not part of the rulemaking process. 

DOE did not start an applicable rulemaking before EISA 2007 for metal halide lamp fixtures, 

3 
commercial package air conditioning and heating equipment, or electric motors. For these 

products, DOE estimated the impacts of prescribed standards using the same general 

methodology as for a DOE rulemaking, but made assumptions based on other available data. 

1.5 PRODUCTS NOT CONSIDERED IN THE ANALYSIS 

DOE did not analyze prescribed standards for residential clothes washers, mercury vapor 

lamp ballasts, some commercial package air conditioning and heating equipment, candelabra 

base incandescent lamps, and intermediate base incandescent lamps because DOE considers the 

impacts of standards to be minimal. This section briefly outlines DOE’s reasoning. 

1.5.1 Residential Clothes Washers 

The 2001 DOE Residential Clothes Washer Final Rule (66 FR 3314) established the existing 

clothes washer energy conservation standard using a Modified Energy Factor (MEF). DOE 

established standards for residential clothes washers as 1.04 MEF in 2004 and 1.26 in 2007 for 

“standard” sized clothes washers. EISA 2007 amended Section 325(g) of EPCA by prescribing a 

water factor standard, but did not change the energy conservation standard. Therefore, DOE 

believes there will be minimum benefits resulting from the energy conservation standards for 

residential clothes washers prescribed in EISA 2007. 

1.5.2 Mercury Vapor Lamp Ballasts 

Section 135(c) of EPACT 2005 amended section 325 of EPCA by prohibiting the 

manufacture of new mercury vapor ballasts after January 1, 2008. Section 316(d) of EISA 2007 

amends the same section of EPCA by defining mercury vapor lamps as “screw-based” and 

providing an exception for ballasts for non-screw-based and specialty application mercury vapor 

lamps. This exclusion of ballasts for specialty application and non screw-based mercury vapor 

lamps does not result in increased equipment costs, energy savings, or emissions reductions. The 

exclusions apply to unique applications for which mercury vapor lamps are the best available 

technology, including quality inspection, industrial processing (such as chip manufacturing), and 

scientific use (such as fluorescent microscopy and ultraviolet curing). These special application 

and non-screw-based mercury vapor lamp ballasts must bear the label, “For specialty 

applications only, not for general illumination,” and will have minimal impact on the overall 

efficiency of mercury vapor lighting systems.

1.5.3 Commercial Package Air Conditioning and Heating Equipment 

Section 314(a) of EISA 2007 amended section 340 of EPCA by adding definitions for single 

packaged vertical air conditioners (SPVACs) and single packaged vertical heat pumps 

(SPVHPs). Section 314(b) of EISA 2007 amended section 342(a) of EPCA by providing energy 

conservation standards for SPVACs and SPVHPs manufactured on or after January 10, 2010. 

Table 1.3 summarizes the standards prescribed by EISA 2007. 

4 
Table 1.3 EISA 2007 Prescribed Standard for Commercial Package Air Conditioning 

Product Cooling Capacity 

(Btu/h) 

Category Efficiency 

Level 

Small Commercial Packaged Air 

Conditioning and Heating Equipment (AirCooled, Three-Phase) 

<65,000 AC 

HP 

SEER = 13.0 

SEER = 13.0 

HSPF = 7.7 

Single Package Vertical Air Conditioners 

and Single Package Vertical Heat Pumps 

(Single-Phase, Three-Phase) 

<65,000 AC 

HP 

EER=9.0 

EER=9.0 

COP=3.0 

Single Package Vertical Air Conditioners 

and Single Package Vertical Heat Pumps 

≥ 65,000 and 

< 135,000 

AC 

HP 

EER=8.9 

EER=8.9 

COP=3.0 

Single Package Vertical Air Conditioners 

and Single Package Vertical Heat Pumps 

≥ 135,000 and 

<240,000 

AC 

HP 

EER=8.6 

EER=8.6 

COP=2.9 

SEER – seasonal energy efficiency ratio 

HSPF – heating seasonal performance factor 

EER – energy efficiency ratio 

COP – coefficient of performance 

According to the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Directory of 

Certified Product Performance,

2

 all certified equipment has a cooling capacity less than 65,000 

Btu/h as of June 2008. Consequently, DOE did not analyze the two equipment classes included 

in EISA 2007 with cooling capacities above 65,000 Btu/h. 

DOE also used the analysis developed as part of the 2006 Technical Support Document for 

Commercial Heating, Air-Conditioning, and Water Heating Equipment.3 The market data 

presented in the TSD demonstrates that the majority of SPVACs are rated above 9.0 EER, which 

is the minimum energy conservation standard level EISA 2007 set for such equipment. The 

majority of SPVHPs are rated at or above 9.0 EER, which is also the minimum energy 

conservation standard level EISA set for such equipment. The energy conservation standards for 

SPVACs and SPVHPs set forth in EISA 2007 can be met by at least 97 percent of the total 

market.4

 DOE believes the efficiency levels set forth in EISA 2007 more closely represent the 

current market efficiency levels for SPVACs and SPVHPs and are representative of the baseline 

equipment. Therefore, DOE believes there will be minimal benefits resulting from the energy 

 

2

 Air-Conditioning, Heating, & Refrigeration Institute (AHRI). Directory of Certified Product Performance, Single 

Package Vertical Systems. (Last Accessed June 4, 2008). 

<http://www.ahridirectory.org/ahriDirectory/pages/spv/defaultSearch.aspx>. 

3

 Department of Energy. Technical Support Document (TSD): Energy Efficiency Program for Commercial and 

Industrial Equipment: Efficiency Standards for Commercial Heating, Air-Conditioning, and Water Heating 

Equipment, March 2, 2006. (Last Accessed June 4, 2008). 

<http://www.eere.energy.gov/buildings/appliance_standards/commercial/pdfs/ashrae_products/ashrae_products_draf

t_tsd_030206.pdf>. pp. 25-36. 

4

 Id. 

5 
conservation standards set forth in EISA 2007 for SPVACs and SPVHPs and did not perform 

any additional analysis on these equipment classes. 

 DOE only analyzed the EISA 2007 prescribed standard for small commercial packaged 

air conditioning and heating equipment (air-cooled, three-phase) for this report. 

1.5.4 Candelabra Base Incandescent Lamps and Intermediate Base Incandescent Lamps 

Section 321(a) of EISA 2007 also amended section 325(i) of EPCA to set energy 

conservation standards for candelabra incandescent lamps and intermediate base incandescent 

lamps. A candelabra base incandescent lamp shall not exceed 60 rated watts and an intermediate 

base incandescent lamp shall not exceed 40 rated watts. Because nearly all candelabra and 

intermediate base incandescent lamps on the market already meet their respective standards, 

DOE expects minimal impact as a result of the amendment. 

6 
2 ENERGY CONSERVATION STANDARDS PRESCRIBED BY EISA 2007 

2.1 INTRODUCTION 

DOE’s benefit analysis estimates the impacts of the standards prescribed by EISA 2007. For 

all rulemakings and its analysis in this report, DOE selected baseline units as reference points 

against which it measured changes resulting from energy conservation standards. To determine 

energy, economic, and environmental benefits, DOE compared each higher energy efficiency 

and lower energy efficiency design option with the baseline unit. This chapter outlines the 

baseline units DOE used for this report and the new EISA 2007 prescribed standards. 

2.2 BASELINE EFFICIENCY LEVELS 

The baseline unit represents the basic characteristics of equipment in that class. Typically, a 

baseline unit just meets the current required energy conservation standards and provides basic 

consumer utility. For most products, DOE selects baseline efficiency levels based on the current 

minimum standard. The assumed baseline efficiency levels used in this analysis are described 

below. 

Residential boilers. The current minimum energy conservation standards for gas- and oilfired residential boilers as measured by Annual Fuel Utilization Efficiency (AFUE)5

 became 

effective on January 1, 1992 and apply to gas- and oil-fired residential boilers manufactured 

before November 19, 2015. DOE developed the following standards, which also serve as the 

baseline efficiency level for gas- and oil-fired residential boilers (10 CFR Part 430.32(e)): 

 

 Boilers (excluding gas steam) = 80% AFUE 

 Gas steam boilers = 75% AFUE 

Dishwashers. The current minimum energy conservation standards for dishwashers, as 

measured by the energy factor (EF) in cycles per kilowatt-hour (kWh), became effective on May 

14, 1994. DOE developed the following standards, which also serve as the baseline efficiency 

level for compact and standard capacity dishwashers (10 CFR Part 430.32(f)): 

 Compact = 0.62 EF 

 Standard = 0.46 EF 

Incandescent Reflector Lamps. EPACT 1992 established minimum energy conservation 

standards for incandescent reflector lamps as measured by minimum average lamp efficacy 

(lumens per watt (LPW) that became effective on November 1, 1995. EISA 2007 extends the 

coverage of the EPACT 1992 standard to include certain elipsoidal reflector (ER), bulged 

 

5

 AFUE, as determined in §430.22(n)(2) of 10CFR Part 430.

7 
reflector (BR), and blown parabolic reflector (BPAR) reflector lamps. For this report, DOE 

considered the efficacy of lamps at two lamp wattages and generalized the energy savings from 

these two levels. At 120W, DOE estimated the baseline efficacy to be 10.8 lm/W, and at 90W, 

DOE used 12.2 lm/W as the baseline. 

 90W Baseline = 12.2 lm/W 

 120W Baseline = 10.8 lm/W 

Dehumidifiers. For dehumidifiers, each energy efficiency level is expressed as a minimum 

EF, which is a function of liters per kWh. EPACT 2005 established the current minimum energy 

conservation standards for dehumidifiers based on the unit’s capacity (in pints/day). Table 2.1

shows the product classes EPACT 2005 established, along with the standard levels set to take 

effect October 1, 2007. (EPACT 2005, section 135(c)(4); 42 U.S.C. 6295(cc); 70 FR 60407, 

60414, (October 18, 2005); 10 CFR 430.32(v)). DOE used the October 1, 2007 levels as baseline 

efficiency levels. 

Table 2.1 EPACT 2005 Standards for Residential Dehumidifiers 

Dehumidifier Capacity EF 

(liters/kWh)

25.00 pints/day or less 1.00 

25.01–35.00 pints/day 1.20 

35.01–54.00 pints/day 1.30 

54.01–74.99 pints/day 1.50 

75.00 pints/day or more 2.25 

Class A External Power Supplies. There is no current energy conservation standard for 

class A external power supplies. DOE obtained the baseline efficiency for class A external 

power supplies using line-frequency designs for units with low and medium output power and 

low-efficiency switched-mode for units with high output power. Table 2.2 shows the 

characteristics of the baseline units in each of the three product classes DOE analyzed. 

Table 2.2 Class A External Power Supply Baseline Units 

Representative Unit 

Low Power 

Representative Unit 

Medium Power

Representative Unit 

High Power

Output Power 2.75 W 18 W 90 W 

Output Voltage 5 V 12 V 19 V 

Baseline Design 

Characteristics Line-Frequency Line-Frequency Baseline SwitchedMode 

Baseline Efficiency 30% 66% 78% 

Baseline No-Load 2 W 2 W 2 W 

8 
Power 

Despite the absence of Federal standards before the passage of EISA 2007, the class A power 

supplies DOE examined exhibit a wide range of efficiencies. DOE estimated that at the time 

EISA was enacted, only 30 percent and 15 percent of power supplies on the market were 

operating at the baseline efficiency for those units similar to the low and medium power 

representative units, respectively. The remaining units on the market operate at higher efficiency 

levels. The proportion of units operating at the baseline efficiency level was higher for devices 

with higher output power; DOE estimated that 60 percent of the power supplies characterized by 

the high power representative unit were operating at baseline efficiency. The remainder of the 

market was estimated to be distributed among five (or four, in the case of the high power 

representative unit) additional efficiency levels to form the base case (i.e., before the standard) 

distribution of products (Table 2.3). DOE attributes this variation in efficiency to consumer 

demand for portability,6 market-pull programs such as ENERGY STAR, and international and 

state standards, including those developed by the California Energy Commission (CEC). 

Table 2.3 Base Case Efficiency Distribution for Class A External Power Supplies 

Representative Unit 

Low Power (%)

Representative Unit 

Medium Power (%)

Representative Unit 

High Power (%)

Baseline LineFrequency 30 15 Not Applicable 

Baseline Switched 

Mode 30 45 60 

CEC Tier 1 15 15 15 

CEC Tier 2 12 6 9 

> CEC Tier 2 10 18 5 

Market Best 3 1 11 

General Service Incandescent Lamps. Although DOE completed draft analysis on general 

service incandescent lamps before EISA 2007, the Act preceded the DOE rulemaking. This 

report’s data on general service incandescent lamps is from manufacturer interviews, product 

catalogs, and a literature review conducted before EISA 2007. For this analysis, DOE assumed 

the residential incandescent lamp market only contains 75W and 60W lamps. These two lamp 

types have the largest market share. DOE assumed a baseline market of 70 percent incandescent 

lamps (both 60W and 75W) and 30 percent compact fluorescent lamps. 

Metal Halide Lamp Fixtures. The baseline efficiency levels for metal halide lamp fixtures 

are from manufacturer catalogs for ballasts operating the most common metal halide lamps used 

in the market. DOE identified these lamps from data provided by the National Electrical 

 

6

 The size of power electronic components is limited by the component’s ability to dissipate heat generated during 

operation. More efficient components generate less heat for a given output power, requiring less surface area for 

dissipation and permitting smaller power supply sizes. 

9 
Manufacturers Association’s (NEMA) for the Energy Conservation Program for Commercial 

and Industrial Equipment: High-Intensity Discharge (HID) Lamps Rulemaking. For this report, 

DOE assumed a baseline metal halide ballast efficiency of 78 percent for medium-base magnetic 

probe-start ballasts, 77 percent for medium-base pulse-start ballasts, 88 percent for mogul-base 

magnetic probe start ballasts, 85 percent for mogul-base magnetic pulse-start ballasts, 87 percent 

for mogul-base electronic pulse-start ballasts, and 75 percent for ceramic metal halide ballasts. 

Table 2.4 Baseline Efficiency Levels for Metal Halide Lamp Fixtures 

Ballast Type Ballast Efficiency (%) 

Medium-Base Magnetic Probe Start 78 

Medium-Base Pulse Start 77 

Mogul-Base Magnetic Probe Start 88 

Mogul-Base Magnetic Pulse Start 85 

Mogul-Base Electronic Pulse Start 87 

Ceramic Metal Halide 75 

Electric Motors. The Energy Policy Act of 1992 (EPACT 1992) established nominal 

efficiency levels for electric motors. For this report, the baseline efficiency levels are the current 

energy conservation standard set by EPACT 1992. DOE considered only the product classes (as 

defined by horsepower) displayed in Table 2.5 due to limited shipment data. Because there is no 

energy conservation standard for motors with 500 horsepower, DOE assumed a baseline 

efficiency equal to that of 200 horsepower motors. The complete listing of motor horsepower 

and nominal full load efficiency established by EPACT 1992 can be found in 10 CFR Part 

431.25. 

Table 2.5 Baseline Efficiency Levels for Electric Motors 

Motor 

Horsepower 

Nominal Full Load Efficiency 

Open Motors (four poles), (%) 

1 82.5 

5 87.5 

20 91.0 

50 93.0 

100 94.1 

200 95.0 

500* 95.0 

* DOE assumed the baseline efficiency for 500 hp motors to be the 

same as for 200 hp motors. 

10 
Commercial air conditioning and heating equipment. Table 2.6 presents the baseline 

efficiency level DOE assumed for commercial air conditioning and heating equipment. 

Table 2.6 Baseline Efficiency Levels for Commercial Air Conditioning and Heating 

Equipment 

Product Cooling Capacity 

(Btu/h) 

Category Efficiency 

Level 

Small Commercial Packaged Air 

Conditioning and Heating Equipment 

(Air-Cooled, Three-Phase) Split System 

<65,000 AC 

HP 

SEER = 10 

SEER = 10 

HSPF = 6.8 

Small Commercial Packaged Air 

Conditioning and Heating Equipment 

(Air-Cooled, Three-Phase) Single Package 

<65,000 AC 

HP 

SEER = 9.7 

SEER = 9.7 

HSPF = 6.6 

Walk-in coolers and walk-in freezers. Because there are no Federal energy conservation 

standards for walk-in coolers and walk-in freezers, DOE took the baseline energy use from 

Energy Savings Potential for Commercial Refrigeration Equipment by Arthur D. Little, 1996. 

Table 2.7 Baseline Efficiency Levels for Walk-In Coolers and Walk-In Freezers 

Product Average Energy 

Consumption 

(kWh/year) 

Walk-In Coolers 16,200 

Walk-In Freezers 21,400 

Walk-In Freezer/Cooler Combination Units 30,200 

11 
2.3 EISA 2007 STANDARDS 

This section outlines standards prescribed by EISA 2007. 

2.3.1 Residential Boilers 

Section 303 of EISA 2007 amended section 325(f) of EPCA to adopt energy conservation 

standards for residential boilers manufactured after September 1, 2012 (Table 2.8). 

Table 2.8 EISA 2007 Prescribed Standards for Residential Boilers 

Boiler Type AFUE 

(%) 

Design Requirements 

Gas Hot Water 82 No constant burning pilot, automatic means for 

adjusting water temperature 

Gas Steam 80 No constant burning pilot 

Oil Hot Water 84 Automatic means for adjusting temperature 

Oil Steam 82 None 

Electric Hot Water None Automatic means for adjusting temperature 

Electric Steam None None 

2.3.2 Dishwasher 

Section 311(a) of EISA 2007 amended section 325(g) of EPCA to adopt energy conservation 

standards and water conservation standards for residential dishwashers manufactured on or after 

January 1, 2010 (Table 2.9). 

Table 2.9 EISA 2007 Prescribed Standards for Residential Dishwashers 

Product Size 

Maximum 

Energy Use

(kwh/year)

Maximum Water 

Consumption 

(gallons per cycle)

Standard Size 355 6.5 

Compact Size 260 4.5 

DOE did not analyze compact dishwashers in this report because they represent such a small 

fraction of the current market. In 2005, compact dishwashers comprised approximately 1 percent 

of the total U.S. dishwasher market.7

 

 

7

 ENERGY STAR® Criteria for Dishwashers Revision Meeting Notes, U.S. Department of Energy Headquarters, 

July 13, 2005. Available at: 

12 
2.3.3 Incandescent Reflector Lamps 

Section 322(b) of EISA 2007 amended section 325(i) of EPCA by extending coverage of 

incandescent reflector lamps to include certain elipsoidal reflector (ER), bulged reflector (BR), 

and blown parabolic reflector (BPAR) reflector lamps; added definitions for these lamps; and 

established energy conservation standards for lamps manufactured on and after January 1, 2008. 

For this analysis, DOE considered the benefits of the previously exempted ER, BR, and BPAR 

lamps complying with the incandescent reflector lamp standard established by EPACT 1992 

(Table 2.10). 

Table 2.10 EPACT 1992 Prescribed Standards for Incandescent Reflector Lamps 

Nominal Lamp 

Wattage 

Minimum Average 

Lamp Efficacy (LPW) 

40-50 10.5 

51-66 11.0 

67-85 12.5 

86-115 14.0 

116-155 14.5 

156-205 15.0 

2.3.4 Dehumidifiers 

Section 311(a) of EISA 2007 amended EPCA to add a new section 325(cc)(2) setting energy 

conservation standards using energy factor levels for dehumidifiers manufactured on or after 

October 1, 2012 (Table 2.11). 

Table 2.11 EISA 2007 Prescribed Standards for Dehumidifiers 

Product Capacity 

(pints/day) 

Minimum Energy 

Factor 

(liters/kWh) 

Up to 35.00* 1.35 

35.01  45.00 1.50 

45.01  54.00 1.60 

54.01  75.00 1.70 

75.00 or more 2.50 

* DOE analyzed 025.00 pints/day and 25.0135.00 pints/day 

separately in the rulemaking. Values provided are for 

 

http://www.energystar.gov/ia/partners/prod_development/revisions/downloads/dishwashers/DW_CriteriaMeeting_M

eetingNotes_0705.pdf (last accessed Dec. 9, 2008). 

13 
25.0135.00 pints/day class, which is most representative. 

2.3.5 Class A External Power Supplies 

Section 301 of EISA 2007 amended sections 321 and 325(u) of EPCA by adding definitions and 

establishing energy conservation standards for class A external power supplies manufactured on or 

after July 1, 2008. The EISA 2007 standard for class A external power supplies, presented in Table 

2.12, is equal to the Tier 2 level of California Energy Commission (CEC) appliance efficiency 

standards. As Table 2.3 shows, DOE estimates that 25 percent of class A external power supplies 

already complied with this level and would not be affected by the EISA 2007 standard. 

Table 2.12 EISA 2007 Prescribed Standards for Class A External Power Supplies 

Active Mode 

Nameplate Output Required Efficiency 

(decimal equivalent of a percentage) 

Less than 1 watt 0.5 times the nameplate output 

From 1 watt to no more than 51 

watts 

The sum of 0.09 times the natural logarithm or the 

nameplate output and 0.5 

Greater than 51 watts 0.85 

No-Load Mode 

Nameplate Output maximum consumption 

No more than 250 watts 0.5 watts 

2.3.6 General Service Incandescent Lamps 

Section 321(a) of EISA 2007 amended sections 321 and 325 of EPCA to add definitions and 

set energy conservation standards for general service incandescent lamps for certain rated lumen 

ranges and effective dates. Prescribed standards for general service lamps are shown in Table 

2.13. 

Table 2.13 EISA 2007 Prescribed Standards for General Service Incandescent Lamps 

Rated Lumen Ranges Maximum Rated 

Wattage 

Minimum Rated 

Lifetime (hrs) Effective Date 

1,490 - 2,600 72 1,000 1/1/2012 

1,050 - 1,489 53 1,000 1/1/2013 

750 - 1,049 43 1,000 1/1/2014 

310 - 749 29 1,000 1/1/2014 

EISA 2007 also required the Secretary of the Department of Energy to complete a general 

service incandescent lamp rulemaking when the savings are greater than or equal to 45 lumens 

per watt by January 1, 2020. Currently, there is no 45 lumen per watt lamp available. For this 

14 
analysis, DOE assumed that all incandescent lamps would be obsolete by 2020 and only compact 

fluorescent lamps would be sold. 

2.3.7 Metal Halide Lamps 

Section 324(e) of EISA 2007 amends sections 321 and 325 of EPCA to add definitions and 

set energy conservation standards for metal halide lamp fixtures. EISA 2007 prescribed that 

metal halide lamp fixtures manufactured on or after January 1, 2009, and designed to be operated 

with lamps rated greater than or equal to 150 watts but less than or equal to 500 watts, shall 

contain (a) a pulse-start metal halide ballast with a minimum ballast efficiency of 88 percent; (b) 

a magnetic probe-start ballast with a minimum ballast efficiency of 94 percent; (c) a nonpulsestart electronic ballast with either a minimum ballast efficiency of 92 percent for wattages 

greater than 250 watts; or (d) a minimum ballast efficiency of 90 percent for wattages less than 

or equal to 250 watts. 

DOE modeled the metal halide ballast market as composed of six different product classes: 

(1) medium-base magnetic probe-start metal halide, (2) medium-base pulse-start metal halide, 

(3) mogul-base magnetic probe-start metal halide, (4) mogul-base magnetic pulse start metal 

halide, (5) mogul-base electronic pulse-start metal halide, and (6) ceramic metal halide. DOE 

assumed that medium-base magnetic probe-start lamp technology would become obsolete as a 

result of the EISA 2007 metal halide ballast efficiency standards, and would be replaced by 

medium-base electronic pulse start technology. DOE also assumed that mogul-base magnetic 

probe-start ballasts would be replaced by EISA 2007-compliant magnetic probe-start ballasts, 

and mogul-base magnetic and electronic pulse start ballasts would be replaced by EISA 2007-

compliant electronic pulse-start ballasts. EISA 2007 has limited impact on the energy 

consumption of medium-base magnetic and electronic pulse-start ballasts and ceramic metal 

halide ballasts because most of these product classes are outside EISA 2007 coverage (i.e.,

150500 W). 

2.3.8 Electric Motors 

Section 313 of EISA 2007 amended sections 340 and 342 of EPCA to add definitions and set 

energy conservation standards for general purpose electric motors (subtype I), fire pump motors, 

general purpose electric motors (subtype II), and NEMA design B general purpose electric 

motors. EISA 2007 requires that general purpose electric motors (subtype I) with a power rating 

of 1 horsepower or greater, but not greater than 200 horsepower, manufactured alone or as a 

component of another piece of equipment on or after December 19, 2010, shall meet the nominal 

full load efficiency levels specified in Table 12-12 of NEMA’s MG-1 (2006), “Motors and 

Generators.” In addition, EISA 2007 requires that fire pump motors; general purpose electric 

motors (subtype II) with a power rating of 1 horsepower or greater, but not greater than 200 

horsepower; and NEMA design B general purpose electric motors with a power rating of more 

than 200 horsepower, but not greater than 500 horsepower manufactured alone or as a 

component of another piece of equipment on or after December 19, 2010, shall meet the full load 

efficiency levels specified in NEMA MG-1 (2006) Table 12-11. 

Because the shipment data for electric motors was minimal, DOE used the standards in Table 

15 
2.14 to estimate the benefits of the EISA 2007 prescribed standards. 

Table 2.14 EISA 2007 Prescribed Standard for Electric Motors Used in This Analysis 

Motor 

Horsepower 

Nominal Full Load Efficiency 

Open Motors (four poles) 

1 85.5 

5 89.5 

20 93.0 

50 94.5 

100 95.4 

200 95.8 

500 96.2 

2.3.9 Commercial Package Air Conditioning 

 Section 314 of EISA 2007 amends sections 340 and 342(a) of EPCA to add definitions of 

new classes of commercial package air conditioning and heating equipment and to establish 

energy conservation standards for commercial package air-conditioning and heating equipment. 

Small commercial package air-conditioning and heating equipment (other than single package 

vertical air conditioners) manufactured on or after June 16, 2008, shall meet specific minimum 

energy efficiency levels, depending on category and on the product capacity (Btu per hour) 

specified in EISA 2007. DOE used the standards in Table 2.15 to estimate the benefits of the 

EISA 2007 prescribed standards. 

Table 2.15 EISA 2007 Prescribed Standard for Commercial Package Air Conditioning 

Considered in This Report 

Product Cooling Capacity 

(Btu/h) 

Category Efficiency 

Level 

Small Commercial Packaged Air 

Conditioning and Heating Equipment, 

(Air-Cooled, Three-Phase) 

<65,000 AC 

HP 

SEER = 13.0 

SEER = 13.0 

HSPF = 7.7 

2.3.10 Walk-In Coolers and Walk-In Freezers 

Section 312(b) of EISA 2007 amended sections 340, 342, and 343 of EPCA to add 

definitions, energy conservation standards, and test procedures for measuring the thermal 

resistance (R value) of the panels, doors, floors, door closures, motors, and lighting used in walkin coolers and walk-in freezers manufactured on or after January 1, 2009. The energy 

conservation standards for these products are discussed in section 431.306 of the Code of 

Federal Regulations. 

16 
3 ENERGY SAVINGS ESTIMATES 

3.1 INTRODUCTION 

The following chapter explains the general methodology used to estimate the energy savings 

of the EISA 2007 prescribed standards. For the products for which DOE has not conducted a 

rulemaking analysis, DOE followed a similar methodology, although DOE made some 

assumptions based on the available data. Table 1.2 shows the DOE rulemakings considered in 

this analysis and their corresponding data sources. 

3.2 ENERGY SAVINGS ESTIMATES 

To determine energy saving benefits for consumers, DOE must determine the annual energy 

use, shipment data, equipment stock, national energy consumption, and site-to-source conversion 

factors. 

DOE calculates annual national energy savings (NES) as the difference between two 

projections: a base case (without new standards) and a standards case (with new standards) 

(Equation 1). Positive values from this equation correspond to energy savings (i.e., national 

energy consumption with standards is less than national energy consumption in the base case). 

Equation 1: NESy = AEC BASE – AEC STD

where 

AEC = annual national energy consumption each year in quadrillion British 

thermal units (Btus) – or quads, summed over vintages of the product 

stock, STOCKV, 

NES = annual national energy savings (quads), 

STOCKV = stock of product (millions of units) of vintage V surviving in the year for 

which DOE calculated annual energy consumption (vintages range from 5 

to approximately 28 years, depending on the retirement function of the 

product), 

UECV = annual energy consumption per product in either kilowatt-hours (kWh) or 

million Btus (MMBtu) (electricity and gas consumption are converted 

from site energy to source energy (quads) by applying a time-dependent 

conversion factor), 

V = year in which the product was purchased as a new unit, and 

y = year in the forecast (i.e., 2012 to 2042). 

Cumulative energy savings are the sum over the forecast period, extending from the assumed 

effective date of the energy conservation standard, i.e., 2008, to 2038, of the annual national 

energy savings (Equation 2). 

17 
Equation 2: NEScum = Σ NES 

y 

DOE calculated the national annual energy consumption by multiplying the number or stock 

of the given product by its unit energy consumption (Equation 3): 

Equation 3: AEC = Σ STOCKV × UECV 

The following subsections describe the general approach DOE used to develop the four 

inputs to calculate the energy savings estimates. 

3.2.1 Annual Energy Consumption Per Unit 

In a rulemaking, DOE presents the per-unit annual energy consumption as a function of product 

efficiency. Because the per-unit annual energy consumption directly depends on efficiency, DOE 

used the base case and standards case in combination with the annual energy data to estimate the 

shipment-weighted average annual per-unit energy consumption under the base case and standards 

cases. The technical support document accompanying each DOE rulemaking describes this process in 

detail (Table 1.2). 

For products that had no prior analysis, DOE determined the annual per-unit energy consumption 

using the same methodology used in the rulemakings. Table 3.1 and Table 3.2 show the sources 

DOE used to determine the unit efficiency and operating hours of the baseline and EISA 2007 

standard levels. 

Table 3.1 Unit Efficiency Sources 

Product/Equipment Type Unit Efficiency Data Source 

General Service Incandescent Lamps Lamp catalogs and product research 

Class A External Power Supplies Manufacturer interviews, DOE measurements, 

and ENERGY STAR qualified product list 

Metal Halide Lamp Fixtures Ballast product catalogs 

Electric Motors N/A. The standard is presented in horsepower 

efficiency. 

Commercial Package Air Conditioning and 

Heating Equipment 

Department of Energy. “Commercial Package 

Air Conditioning and Heating Equipment 

Screening Analysis.” 2000. 

Walk-In Coolers and Walk-In Freezers Arthur D. Little. “Energy Savings Potential for 

Commercial Refrigeration Equipment.” 1996. 

Table 3.2 Operating Hour Sources 

Product/Equipment Type Operating Hours Source 

General Service Incandescent Lamps Energy Information Agency. “Residential 

Energy Consumption, Energy Information 

Agency.” 2003. 

18 
Navigant Consulting, Inc. "U.S. Lighting Market 

Characterization: Volume 1: National Lighting 

Inventory and Energy Consumption Estimate." 

2002. Washington, DC: U.S. Department of 

Energy. 

http://www.netl.doe.gov/ssl/publicationsssltechreports.htm. 

Class A External Power Supplies Porter, Moorefield, Ostendorp. “Final Field 

Research Report.” October 2006. Ecos 

Consulting: Durango, CO. 

Rosen and Meier. “Energy Use of Consumer 

Electronics at the End of the 20th Century.” 

2000. Lawrence Berkeley National Laboratory: 

Berkeley, CA. 

Roth, Ponoum, and Goldstein. “US Residential 

Information Technology Energy Consumption in 

2005 and 2010.” May 2006. TIAX: Cambridge, 

MA. 

TIAX LLC. “Assessment of Analyses Performed 

for the California Energy Efficiency Regulations 

for Consumer Electronics Products. Prepared by 

TIAX for CEA.” Feb 2006. TIAX LLC: 

Cambridge, MA. 

Metal Halide Lamp Fixtures Navigant Consulting, Inc. "U.S. Lighting Market 

Characterization: Volume 1: National Lighting 

Inventory and Energy Consumption Estimate." 

2002. Washington, DC: U.S. Department of 

Energy. 

http://www.netl.doe.gov/ssl/publicationsssltechreports.htm. 

Electric Motors American Council for and Energy-Efficient 

Economy. “Impact of Proposed Increases to 

Motor Efficiency Performance Standards.” 

October 2007. 

Commercial Package Air Conditioning and 

Heating Equipment 

Department of Energy. “Commercial Package 

Air Conditioning and Heating Equipment 

Screening Analysis.” 2000. 

Walk-In Coolers and Walk-In Freezers Operating hours were assumed to be 24 hr/day. 

3.2.2 Shipments Equipment Stock 

19 
DOE forecasts shipments for the base case and all proposed standards cases in a rulemaking. 

Several factors, including total installed costs (purchase price plus installation costs), operating 

cost, household income, and equipment lifetime, all affect forecasted shipments. Of these factors, 

total installed cost was the primary driver in forecasting the impact of standards on shipments. 

The increased total installed cost of more efficient equipment causes some customers to 

forego equipment purchases. Consequently, shipments forecasted under the standards cases can 

be lower than under the base case. An extensive description of the methodology for conducting 

and generating the shipments forecasts for each of the considered products can be found in the 

product’s technical support document in the shipments analysis chapter (Table 1.2). 

For products that DOE has no prior analysis on, DOE estimated the shipment data using 

outside sources. Historical shipments were available for general service incandescent lamps and 

metal halide lamp fixtures. Based on that data, DOE made flat projections of future shipments. 

DOE estimates that metal halide ballast shipments are one-third of metal halide lamp shipments, 

assuming one lamp per ballast and that each ballast has a lifetime as long as a metal halide lamp. 

DOE did not project future shipments for electric motors or walk-in coolers and walk-in 

freezers because the available shipment data was too limited. DOE assumed that the shipments 

and installed base for electric motors would not change significantly by 2038. DOE was able to 

project future shipments for class A external power supplies and commercial package air 

conditioning and heating equipment based on historical shipments. 

Table 3.3 Shipment and Equipment Stock Data Sources 

Product/Equipment Type Shipment Data Source 

General Service Incandescent Lamps Obtained from National Electrical 

Manufacturers Association (NEMA), 2007. 

Lamp catalogs 

Class A External Power Supplies Department of Energy. “Battery Chargers and 

External Power Supplies Draft Technical 

Report.” June 2008. 

Metal Halide Lamp Fixtures NEMA. “High-Intensity Discharge Lamp 

Survey.” Energy Conservation Program for 

Commercial and Industrial Equipment: HighIntensity Discharge (HID) Lamps Rulemaking, 

2004. 

Electric Motors U.S. Census Bureau. Current Industry Reports 

2003. MA335H. 2003. 

Commercial Package Air Conditioning and 

Heating Equipment 

Department of Energy. “Commercial Package 

Air Conditioning and Heating Equipment 

Screening Analysis.” 2000. 

Walk-In Coolers and Walk-In Freezers Arthur D. Little. “Energy Savings Potential for 

Commercial Refrigeration Equipment.” 1996. 

20 
The equipment stock of a product denotes the number of devices in use in commercial 

buildings, industries, and residential buildings, or a combination of these, depending on which 

segment is under investigation. The equipment stock in a given year is the number of products 

shipped from earlier years that survive in the given year. The models DOE uses for a rulemaking 

track the number of units shipped each year. DOE assumes that the products have an increasing 

probability of retiring as they age. The probability of survival as a function of years-sincepurchase is the survival function. See the specific TSD product sections for further details on the 

survival functions that DOE used in its rulemaking analysis. 

For products for which DOE had no prior analysis, stock estimates came from other studies, 

commercial stock estimates, sales data, and equipment lifetimes. DOE summed the sales data 

over the lifetime of a product to develop a stock estimate. Table 3.3 provides a list of sources for 

equipment stock; Table 3.4 provides a list of sources for lifetime. 

Table 3.4 Lifetime Sources 

Product/Equipment Type Lifetime Source 

General Service Incandescent Lamps Lamp product catalogs 

Energy Information Agency. “Residential 

Energy Consumption, Energy Information 

Agency.” 2003. 

Navigant Consulting, Inc. "U.S. Lighting Market 

Characterization: Volume 1: National Lighting 

Inventory and Energy Consumption Estimate." 

2002. Washington, DC: U.S. Department of 

Energy. 

http://www.netl.doe.gov/ssl/publicationsssltechreports.htm. 

Class A External Power Supplies Department of Energy. “Battery Chargers and 

External Power Supplies Draft Technical 

Report.” June 2008. 

Metal Halide Lamp Fixtures Lamp product catalogs. 

Venture. “Ballast Function.” 2003. 

http://www1.eere.energy.gov/buildings/ 

appliance_standards/commercial/pdfs/ 

hid_lamps/venture_2003b.pdf 

Electric Motors American Council for and Energy-Efficient 

Economy. “Impact of Proposed Increases to 

Motor Efficiency Performance Standards.” 

October 2007. 

21 
Commercial Package Air Conditioning and 

Heating Equipment 

Department of Energy. “Commercial Package 

Air Conditioning and Heating Equipment 

Screening Analysis.” 2000. 

Walk-In Coolers and Walk-In Freezers Arthur D. Little. “Energy Savings Potential for 

Commercial Refrigeration Equipment.” 1996. 

For electric motors, DOE estimated that the survival function is approximately one half the 

lifetime. DOE assumed that products that comply with EISA 2007 would diffuse into the stock 

linearly over the lifetime of the device (Figure 3.1). This is similar to the assumption DOE made 

in the FY 2003 Priority Setting Summary Report and Action Proposed.8

3.2.3 National Annual Energy Consumption 

For DOE rulemakings, the national annual energy consumption is the product of the annual 

energy consumption per unit and the number of units of each vintage (Equation 4). This 

approach accounts for differences in unit energy consumption from year to year. 

Equation 4: AEC = Σ STOCKV × UECV 

Except for electric motors, DOE used the same methodology as above for products that had 

no prior analysis. Since the shipment data was minimal for electric motors, DOE calculated the 

annual energy savings from 20082038 assuming that products that comply with EISA 2007 

diffuse into the stock linearly over the lifetime of the motor (see Figure 3-1) (Equation 5). The 

area under the shaded portion in the graph corresponds to the total actual savings and equals: 

Equation 5: AEC(Motors) = (2038 – 2010) * AES– (1/2 Lifetime * AES) 

Where: 

AES = annual national energy savings and represents the energy saved by 

replacing the entire installed base with products that comply with EISA 

2007, and 

Lifetime = average number of years the product functions as intended. 

 

8

 FY 2003 Priority Setting Summary Report and Action Proposed, Technical Support Document. Available at: 

www.eere.energy.gov/buildings/appliance_standards/pdfs/fy03_priority_setting_app_a.pdf (last accessed Dec. 9, 

2008). 

22 
100%

50%

0%

2008 2008 + Lifetime 2038

100%

50%

0%

2008 2008 + Lifetime 2038

Figure 3.1 Product Penetration Model 

For electric motors, DOE calculated energy savings relative to typical new annual energy 

consumption estimates, i.e., assuming that with the energy conservation standard the entire stock 

has the same efficiency level as the typical new product. 

In determining national annual energy consumption, DOE initially calculated the annual 

energy consumption at the site, and then applied a conversion factor to calculate primary energy 

consumption. 

3.2.4 Energy Site-to-Source Conversion Factors 

For DOE rulemakings, DOE initially calculates the annual energy consumption at the site 

(e.g., for electricity, the energy in kWh consumed at the household or establishment). It then 

calculates primary (source) energy consumption from site energy consumption by applying a 

conversion factor to account for losses associated with the generation, transmission, and 

distribution of electricity and gas. The site-to-source conversion factor is the multiplicative 

factor used for converting site energy consumption into primary or source energy consumption, 

expressed in quads. DOE used annual site-to-source conversion factors in EIA’s Annual Energy 

Outlook.

9

 The factors used are marginal values, which represent the response of the system to an 

incremental decrease in consumption. Natural gas losses include pipeline leakage, pumping 

energy, and transportation fuel. The specific site-to-source conversion factors can be found in the 

 

9

 For DOE rulemakings, the AEO version varies based on when the data was published.

23 
TSD for the corresponding product. For products that had no prior rulemaking analysis, DOE 

estimated the site-to-source conversion for electricity as 10,851 Btu/kWh10 and for natural gas as 

1.10 Btu/Btu11. 

3.3 ASSUMPTIONS 

The energy savings estimates and calculations do not address several issues that could affect 

future energy consumption or savings estimates. For residential boilers, dishwashers, 

dehumidifiers, and incandescent reflector lamps, the assumptions are found in each rulemaking’s 

TSD. Table 3.5 lists assumptions for other products. 

Table 3.5 Energy Savings Calculation Assumptions 

Product/Equipment Type Assumptions 

General Service Incandescent Lamps All energy standards come into effect in 2012 

and then in 2020 (no staggering). 

Impacts of other lumen packages apart from 

baseline 75W and baseline 60W packages are 

negligible. 

Class A External Power Supplies The assumptions for this analysis can be found 

in the Battery Chargers and External Power 

Supplies Draft Technical Report, June 2008. 

Metal Halide Lamp Fixtures DOE estimated the metal halide ballast 

shipments to be one-third of historical metal 

halide lamp shipments, assuming one lamp per 

ballast and that each ballast has a lifetime three 

times as long as a metal halide lamp. From the 

lamp/ballast shipments, DOE determined the 

inventory of metal halide lamps/ballasts for 

20082038. 

 

10 2007 Building Energy Databook. U.S. Department of Energy, Office of Planning, Budget Formulation and 

Analysis, Energy Efficiency and Renewable Energy. September 2007. 

11 Estimated from EIA’s Annual Energy Outlook, 2007. 

24 
Electric Motors DOE assumed fixed shipments from 20082038 

based on average shipments in 2003. 

DOE calculated average efficiencies by 

averaging efficiency standard for the two 

extreme levels. 

DOE assumed 60% of full load for operating 

hours. 

Commercial Package Air Conditioning and 

Heating Equipment 

The assumptions for this analysis can be found 

in the DOE 2000 Screening Analysis for 

Commercial package air conditioning and 

heating equipment. 

Walk-In Coolers and Walk-In Freezers DOE assumed constant shipments across the 

analysis period. 

DOE assumed constant installed base across the 

analysis period. 

3.4 ENERGY SAVINGS RESULTS 

The following section provides the energy saving estimates for the products prescribed in 

EISA 2007. DOE estimates that the prescribed standards in EISA 2007 will save the Nation 

approximately 31 quads of energy from 2008–2038.

Table 3.6 Cumulative Energy Savings, 2008–2038 

Product Cumulative Energy Savings 

(Quads) 

Residential Boilers 0.16

Residential Dishwashers 0.65

Incandescent Reflector Lamps 1.02

Dehumidifiers 0.17

Class A External Power Supplies 4.43

Metal Halide Lamp Fixtures 5.94

Electric Motors 0.14

General Service Incandescent Lamps 14.14

Small Commercial Package Air Conditioning and Heating 

Equipment 

2.91

Walk-In Coolers and Walk-In Freezers 1.35

Total 30.93

25 
4 NET PRESENT VALUE ANALYSIS 

4.1 INTRODUCTION 

The following chapter explains the general methodology DOE used to calculate the net 

present value of the EISA 2007 prescribed standards. For the products for which DOE has not 

conducted a rulemaking analysis, DOE followed a similar methodology, although DOE made 

some assumptions based on the available data. Table 1.2 shows the rulemakings considered in 

this analysis. 

4.2 NET PRESENT VALUE ESTIMATES 

The net present value (NPV) is the value in the present of a time series of costs and savings. 

NPV is described by the equation: 

NPV = PVS - PVC 

where: 

PVS = present value of operating cost savings (including energy, water, repair, and 

maintenance costs), and 

PVC = present value of increased total installed costs (including equipment and 

installation). 

DOE determines the PVS and PVC using the following equations: 

PVS = Σ OCSy × DFy 

PVC = Σ TICy × DFy 

For DOE rulemakings, DOE calculates the total annual operating cost savings by multiplying 

the number or stock of the given product (by vintage) by its per-unit operating cost savings (also 

by vintage). DOE calculated the total annual installed cost increases by multiplying the number 

or stock of the given product (by vintage) by its per-unit total installed cost increase (also by 

vintage). DOE calculates the annual operating costs savings and total annual installed equipment 

cost increases using the following equations: 

OCS 

y 

= Σ STOCKV ×UOCSV 

TIC 

y 

= Σ STOCKV × UTICV 

where: 

26 
OCS = total annual operating cost savings each year summed over vintages of the product 

stock, STOCKV, 

TIC = total annual installed cost increases each year summed over vintages of the product 

stock, STOCKV, 

DF = discount factor in each year, 

STOCKV = stock of product (millions of units) of vintage V surviving in the year for 

which DOE calculated annual energy consumption, 

UOCSV = annual operating cost savings per unit, 

UTICV = annual total installed cost increase per unit, 

V = year in which the product was purchased as a new unit, and 

y = year in the forecast (i.e., 2008 to 2038). 

DOE determined the PVC and PVS for each year, from the effective date of the standard to 

the year when units purchased in 2038 retire. DOE calculated costs and savings as the difference 

between a standards case and a base case (i.e., without new standards). 

DOE calculated a discount factor from the discount rate and the number of years between the 

“present” (i.e., year to which the sum is being discounted) and the year in which the costs and 

savings occur. The NPV is the sum over time of the discounted net savings. 

The NPV calculation uses the following inputs: 

o total installed cost per unit 

o annual operating cost savings per unit 

o total annual installed cost increases 

o total annual operating costs 

o discount factor 

o present value of costs 

o present value of savings 

The increase in the total annual installed cost is equal to the annual change in the per-unit 

total installed cost (difference between base case and standards case) multiplied by the shipments 

forecasted in the standards case. The total annual operating cost savings are equal to the change 

in the annual operating costs (difference between base case and standards case) per unit 

multiplied by the shipments forecasted in the standards case. The annual operating cost includes 

energy, water, repair, and maintenance costs. 

4.1.1 Total Installed Cost Per Unit 

DOE analyzed the per-unit total installed cost as a function of product efficiency. Because 

the per-unit total annual installed cost directly depends on efficiency, DOE used the base case 

and standards case, in combination with the total installed costs to estimate the shipmentweighted average annual per-unit total installed cost under the base case and standards cases. For 

the products that had no prior DOE analysis, DOE researched price data and estimated the 

increase in unit prices for products that comply with EISA 2007. Table 4.1 shows the sources 

DOE used for price data. 

27 
Table 4.1 Equipment Price Sources 

Product/Equipment Type Price Sources 

General Service Incandescent Lamps Lamp product catalogs (i.e., Grainger), online 

distributors, manufacturing interviews 

Class A External Power Supplies The assumptions for this analysis can be found 

in the Battery Chargers and External Power 

Supplies Draft Technical Report, June 2008. 

Metal Halide Lamp Fixtures State of Arkansas (AR) Procurement contracts 

for Osram Sylvania and Advance Transformer 

lighting products. 

www.state.ar.us/dfa//procurement/documents/ba

llastprice.xls. 

www.state.ar.us/dfa/procurement/documents/sp0

70399_consolidated_pricing.pdf. 

State of South Dakota (SD) Procurement 

documents for Advance Transformer lighting 

products. 

www.state.sd.us/boa/opm/Downloads/23809%2

0Electrical%20Supplies%20Price%20Lists/2380

9%20Voss%20Electric%20Price%20Lists.xls 

Electric Motors Motor Challenge Information Clearinghouse, 

Motor Master+ 

Commercial Package Air Conditioning and 

Heating Equipment 

Department of Energy. “Commercial Package 

Air Conditioning and Heating Equipment 

Screening Analysis.” 2000. 

Walk-In Coolers and Walk-In Freezers Arthur D. Little. “Energy Savings Potential for 

Commercial Refrigeration Equipment.” 1996. 

4.1.2 Annual Operating Cost Savings Per Unit 

The per-unit annual operating cost includes energy, water, repair, and maintenance costs. 

DOE assumed no increase in maintenance and repair costs due to standards for all products. 

Therefore, DOE determined the per-unit annual operating cost savings based only on the energy 

cost savings due to a standard level. DOE determined the per-unit annual operating cost savings 

by taking the per-unit annual energy consumption savings developed for each product and 

multiplying it by the appropriate energy price. As described previously, DOE forecasted the perunit annual energy consumption for the base case and each standards case for all products. 

The energy prices used in the DOE rulemakings are presented in each corresponding TSD 

and follow EIA’s Annual Energy Output. For products for which there was no prior analysis, 

DOE forecasted energy prices based on EIA’s Annual Energy Output 2008 – Early Released 

Edition. 

4.1.3 Total Annual Installed Cost Increases 

28 
The total annual installed cost increase for any given standards case is the product of the total 

installed cost increase per unit due to the standard and the number of units of each vintage. This 

approach accounts for differences in total installed cost from year to year. 

4.1.4 Total Annual Operating Cost Savings 

The total annual operating cost savings for any given standards case is the product of the 

annual operating cost savings per unit due to the standard and the number of units of each 

vintage. This approach accounts for differences in annual operating cost savings from year to 

year. 

4.1.5 Discount Factors 

For DOE rulemakings and most of the analyses in this report, DOE multiplies monetary 

values in future years by a discount factor (DF) to determine the present value (Equation 5): 

p )y-(y r)(1

1 DF(y)

 

where: 

r = discount rate, 

y = year of the monetary value, and 

yP = year in which the present value is being determined. 

DOE estimated national impacts with both a 3-percent and a 7-percent real discount rate as 

the average real rate of return on private investment in the U.S. economy. It used these discount 

rates in accordance with the Office of Management and Budget (OMB)’s guidance to Federal 

agencies on the development of regulatory analysis (OMB Circular A-4, September 17, 2003), 

and section E, “Identifying and Measuring Benefits and Costs,” therein. 

4.1.6 Present Value of Costs 

The present value of increased installed costs is the annual installed cost increase in each 

year (i.e., the difference between the standards case and base case), discounted to the present, 

and summed for the time period over which DOE is considering the installation of equipment 

(i.e., from the effective date of standards, 2008 to 2038). 

The increase in total installed cost refers to both equipment costs and installation costs 

associated with the higher energy efficiency of equipment purchased in the standards case 

compared to the base case. DOE calculated annual increases in installed costs as the difference in 

total installed cost for new equipment purchased each year, multiplied by the shipments in the 

standards case. 

4.1.7 Present Value of Savings 

29 
The present value of operating cost savings is the annual operating cost savings (i.e., the 

difference between the base case and standards case) discounted to the present, and summed over 

the period from the effective date, 2008, to the time when the last unit installed in 2038 is retired 

from service. 

Savings are decreases in operating costs (including electricity, repair, and maintenance costs) 

associated with the higher energy efficiency of equipment purchased in the standards case 

compared to the base case. Total annual operating cost savings are the savings per unit 

multiplied by the number of units of each vintage surviving in a particular year. DOE 

rulemakings consider that equipment consumes energy over its entire lifetime. For units 

purchased in 2038, the consumption includes energy consumed until the unit is retired from 

service. 

4.3 ASSUMPTIONS 

The value of energy savings estimates and calculations do not address several issues that 

could affect the estimates. For residential boilers, dishwashers, dehumidifiers, and incandescent 

reflector lamps, the assumptions are found in each rulemaking’s TSD. Table 4.2 lists additional 

assumptions for other products that may affect the energy savings results. 

Table 4.2 Net Present Value Calculation Assumptions 

Product/Equipment Type Assumptions 

General Service Incandescent Lamps Equipment prices stay fixed (in 2007 dollars). 

Class A External Power Supplies The assumptions for this analysis can be found 

in the Battery Chargers and External Power 

Supplies Draft Technical Report, June 2008. 

Metal Halide Lamp Fixtures Equipment prices stay fixed (in 2007 dollars). 

Electric Motors DOE used price data from 450 hp motors 

because there was insufficient data for 500 hp 

motors. 

Equipment prices stay fixed (in 2007 dollars). 

Commercial Package Air Conditioning and 

Heating Equipment 

The assumptions for this analysis can be found 

in the DOE 2000 Screening Analysis for 

Commercial Package Air Conditioning and 

Heating Equipment. 

Walk-In Coolers and Walk-In Freezers Equipment prices stay fixed (in 2007 dollars). 

30 
4.4 NET PRESENT VALUE RESULTS 

The following section provides the net present value results for the products prescribed in 

EISA 2007. The results are cumulative from 2008 to 2038 and are shown as primary energy 

savings. DOE estimates that the prescribed standards will save the Nation approximately $48 

billion-$105 billion ($2007) between 2008 and 2038.

Table 4.3 Cumulative Net Present Value, 2008–2038 

Product 

Net Present Value 

($2007 Billion) 

(7% Discount Rate)

Net Present Value 

($2007 Billion) 

(3% Discount Rate)

Residential Boilers 0.3 1.2*

Residential Dishwashers 1.4 4.1

Incandescent Reflector Lamps 1.4 2.5

Dehumidifiers 0.3 0.7

Class A External Power Supplies 7.0 14.7

Metal Halide Lamp Fixtures 9.6 16.0

Electric Motors (0.6) (1.0)

General Service Incandescent Lamps 27.5 64.2

Small Commercial Package Air 

Conditioning and Heating Equipment (0.9) (2.1)

Walk-In Coolers and Walk-In Freezers 2.1 4.7

Total 48.0 104.9

*Data was not available to calculate the value of energy savings for the residential steam boiler product class. 

31 
5 EMISSIONS REDUCTION ANALYSIS 

5.1 INTRODUCTION 

DOE estimated the environmental emissions reductions of the energy conservation standards 

prescribed by EISA 2007. For a rulemaking, DOE assesses the impact on certain environmental 

indicators using a variant of the U.S. DOE/Energy Information Administration (EIA)’s National 

Energy Modeling System (NEMS)12 known as NEMS-BT to provide key inputs to the analysis. 

The model is based on the latest version of the AEO. Results of the environmental assessment 

will be similar to those provided in the Annual Energy Outlook. 

DOE only provides emissions reductions for carbon dioxide in this report, but recognizes that 

other pollutants are important to consider. The Clean Air Act requires the Environmental 

Protection Agency (EPA) to set National Ambient Air Quality Standards for the following six 

common air pollutants, also known as “criteria pollutants”: (1) ozone, (2) particulate matter 

(PM), (3) carbon monoxide (CO), (4) nitrogen dioxide (NOX), (5) sulfur dioxide (SO2), and (6) 

lead. EPA recently added mercury to this list. Four of the “criteria pollutants” (ozone, PM, CO, 

and lead) are not increased significantly by either electric utility power plants or fuel-fired 

appliances. Other pollutants are precursors to the formation of ozone and particulate matter. 

Electric utilities and fuel-fired appliances are also not significant sources of CO. Almost all 

carbon emissions from electric power plants come in the form of CO2 as the combustion process 

is lean enough not to yield CO in significant amounts. For fuel-fired appliances, proper appliance 

maintenance, installation, and use can prevents dangerous levels of CO. Finally, the ban on the 

use of leaded gasoline has resulted in a dramatic decrease in lead emissions since the mid 1970s. 

Now industrial processes (but not electric utilities)—particularly primary and secondary lead 

smelters and battery manufacturersare responsible for most lead emissions and all violations 

of the lead air quality standards. 

The Clean Air Act Amendments of 1990 gave EPA authority to control acidification and 

require operators of electric power plants to reduce emissions of SO2 and NOX. In addressing 

SO2 emissions, the Clean Air Act Amendments of 1990 set an SO2 emissions cap on all power 

generation, but permitted flexibility among generators through the use of emissions allowances 

and tradable permits. This SO2 trading implies that physical emissions impacts of a standard are 

likely to be zero because emissions will always be at, or near, the allowable amount. 

Consequently, there is no direct SO2 environmental benefit from electricity conservation, as long 

as there is enforcement of the emissions ceiling. To the extent reduced power generation demand 

 

12 For more information on NEMS, please refer to the U.S. Department of Energy, Energy Information 

Administration documentation. A useful summary is National Energy Modeling System: An Overview 2000, 

DOE/EIA-0581(2000), March 2000. EIA approves use of the name NEMS to describe only an official version of the 

model without any modification to code or data. Because this analysis entails some minor code modifications and the 

model is run under various policy scenarios that are variations on EIA assumptions, DOE refers to the model as 

NEMS-BT (BT is DOE’s Building Technologies Program). NEMS-BT was previously called NEMS-BRS. 

32 
decreases the demand for and price of emissions allowance permits, there could be an 

environmentally related economic benefit from standards reducing SO2 emissions allowance 

demand. DOE recognizes there will be a direct benefit of NOX emission savings; however, no 

data is available to calculate those estimates at this time. 

5.2 EMISSIONS REDUCTIONS ESTIMATES 

While DOE analyzed the energy savings and net present value for several products, the 

emissions reductions analysis occurs later in the rulemaking stage and for most products, was not 

completed in time for EISA 2007. However, the final rule for residential boilers contains 

emissions reductions analysis using NEMS-BT.13 For the other products, because there was little 

available data on environmental emissions savings, DOE determined these savings from the 

primary energy savings estimates. DOE assumed there would be emissions reductions from 

decreased energy consumption. 

5.1.1 Carbon Dioxide Emission Savings 

Carbon dioxide is of interest because of its classification as a greenhouse gas and its impact 

on global climate change. Greenhouse gases — which trap the sun’s radiation inside the Earth’s 

atmosphere — either occur naturally in the atmosphere or result from human activities. Naturally 

occurring greenhouse gases include water vapor, CO2, methane (CH4), nitrous oxide, and ozone. 

Human activities, however, add to the levels of most of these naturally occurring gases. For 

example, CO2 is emitted to the atmosphere when solid waste, fossil fuels (oil, natural gas, and 

coal), wood, and wood products are burned. During the past 20 years, about three-quarters of 

anthropogenic (i.e., human-made) CO2 emissions resulted from burning fossil fuels. 

Concentrations of CO2 in the atmosphere are naturally regulated by numerous processes, 

collectively known as the “carbon cycle.” The movement of carbon between the atmosphere and 

the land and oceans is dominated by natural processes, such as plant photosynthesis. While these 

natural processes can absorb some of the anthropogenic CO2 emissions produced each year, 

billions of metric tons are added to the atmosphere annually. The Earth’s positive imbalance 

between emissions and absorption results in the continuing growth of greenhouse gases in the 

atmosphere, thereby causing surface air temperatures and sub-surface ocean temperatures to rise. 

For this report, DOE translated the energy savings estimates into carbon dioxide emissions 

savings using a 15.75 MMTCE/quad conversion factor14. This factor assumes primary energy 

savings from reduced building energy consumption and is an average conversion factor for fuel 

types. 

 

13 US Department of Energy. Environmental Assessment for Today’s Energy Conservation Standards for 

Residential Furnaces and Boilers. September 2007.

14 2008 Building Energy Databook, U.S. Department of Energy, Office of Planning, Budget Formulation and 

Analysis, Energy Efficiency and Renewable Energy. Table 1.4.8 September 2007. 

33 
5.1.2 Monetization of Carbon Dioxide Emission Savings 

DOE may consider a monetary benefit of CO2 emission reductions associated with the 

prescribed standards in EISA 2007. During the preparation of its most recent review of the state 

of climate science, the Intergovernmental Panel on Climate Change (IPCC) identified various 

estimates of the present value of reducing CO2 emissions by one ton over the life that these 

emissions would remain in the atmosphere. The estimates reviewed by the IPCC spanned a range 

of values. Without a consensus on any single estimate of the monetary value of CO2 emissions, 

DOE used an estimate identified by the study cited in Summary for Policymakers prepared by 

Working Group II of the IPCC’s Fourth Assessment Report to estimate the potential monetary 

value of the CO2 reductions likely to result from the standards under consideration in this report. 

DOE converted the estimated yearly reductions in CO2 emissions into a range of monetary 

values based on an assumption of no benefit to an average benefit value reported by the IPCC. 

According to the IPCC, the mean social cost of carbon (SCC) reported in studies published in 

peer-reviewed journals was U.S. $43 per ton of carbon. This translates into about $12 per ton of 

carbon dioxide. The literature review (Tol 2005) from which this mean was derived indicated the 

values to be approximately 1995 values in 1995 dollars, which correspond to a range of $0 to 

$15 in 2007 dollars.15 Additionally, DOE has applied an annual growth rate of 2.4 percent as 

suggested by the IPCC Working Group II, based on estimated increases in damages from future 

emissions.16 As a result, DOE is using a range for the social cost of carbon of $0$20 ($2007) 

per ton of CO2 emissions. Table 5.1 shows the resulting estimates of the potential range of 

benefits associated with reducing CO2 emissions. 

The estimate DOE used as the upper bound value was derived from an estimate of the mean 

value of worldwide climate impacts caused by CO2 emissions. There are no estimated values for 

the U.S. benefits likely to result from CO2 emission reductions. However, if such values were 

developed, DOE would likely use them in its analysis. DOE also expects that such values would 

be lower than comparable global values. 

 

15 Tol, Richard S. J., 2005. The Marginal Damage Costs of Carbon Dioxide Emissions: An Assessment of the 

Uncertainties, Energy Policy, November. Vol. 33, Issue 16, p. 2064-2074. 

16 IPCC Fourth Assessment Report: Working Group II Report Impacts, Adaptation and Vulnerability. 2007. p. 822. 

34 
35 

5.3 EMISSIONS REDUCTIONS RESULTS 

The following section provides emission reduction estimates for the products prescribed by 

in EISA 2007. DOE estimates that the prescribed standards will save the Nation approximately 

490 MMTCE of CO2 emissions from 2008–2038. 

Table 5.1 Cumulative Carbon Dioxide Emissions Savings and Value of Emission Savings, 

2008-2038 

Product 

Carbon Dioxide 

Emission Savings 

 (MMTCE) 

Value of Estimated CO2

Emission Reductions 

Based on IPCC Range 

 ($2007 Billion) 

Residential Boilers 2.6 00.19

Residential Dishwashers 10.2 00.74

Incandescent Reflector Lamps 16.1 01.18

Dehumidifiers 2.7 00.20

Class A External Power Supplies 69.8 05.12

Metal Halide Lamp Fixtures 93.6 06.86

Electric Motors 2.3 00.17

General Service Incandescent Lamps 222.8 016.34

Small Commercial Package Air Conditioning 

and Heating Equipment 45.9 03.36

Walk-In Coolers and Walk-In Freezers 21.3 01.56

Total 487.1 035.72