APPENDIX 7-A. DETAILED NATIONAL ENERGY SAVINGS AND NATIONAL NET 

PRESENT VALUE OUTPUT 

TABLE OF CONTENTS 

7-A.1 INTRODUCTION ...............................................................................................................1 

7-A.2 NATIONAL ENERGY SAVINGS AND NATIONAL NET PRESENT VALUE 

RESULTS CALCULATED FROM THE MARKET BASELINE .........................1 

7-A.3 DETAILED NATIONAL ENERGY SAVINGS AND NATIONAL NET VALUE 

RESULTS GRAPHICS ...........................................................................................3 

7-A.3.1 SMALL GAS-FIRED HOT WATER BOILER .................................................. 4 

7-A.3.2 SMALL GAS-FIRED STEAM ALL EXCEPT NATURAL DRAFT BOILER . 9 

7-A.3.3 SMALL GAS-FIRED STEAM NATURAL DRAFT BOILER ........................ 14 

7-A.3.4 SMALL OIL-FIRED HOT WATER BOILER.................................................. 19 

7-A.3.5 SMALL OIL-FIRED STEAM BOILER ........................................................... 24 

7-A.3.6 LARGE GAS-FIRED HOT WATER BOILER ................................................ 29 

7-A.3.7 LARGE GAS-FIRED STEAM ALL EXCEPT NATURAL DRAFT BOILER 34 

7-A.3.8 LARGE GAS-FIRED STEAM NATURAL DRAFT BOILER ........................ 40 

7-A.3.9 LARGE OIL-FIRED HOT WATER BOILER .................................................. 45 

7-A.3.10 LARGE OIL-FIRED STEAM BOILER ............................................................ 50 

LIST OF TABLES 

Table 7-A.1 Cumulative National Energy Savings for Commercial Boiler Equipment 

(2012-2042) (Quadrillion Btu) by Equipment Class ...............................................1 

Table 7-A.2 Cumulative NPV Results Based on a Seven Percent Discount Rate (Billion 

2008$) by Equipment Class .....................................................................................2 

Table 7-A.3 Cumulative NPV Results based on a Three percent Discount Rate (Billion 

2008$) by Equipment Class .....................................................................................2 

LIST OF FIGURES 

Figure 7-A. 1 Cumulative NPV Results for Small, Gas-fired, Hot Water Based on a 

Seven-Percent Discount Rate (Billion 2008$) .........................................................4 

Figure 7-A. 2 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 

1, Seven-Percent Discount Rate ...............................................................................4 

Figure 7-A. 3 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 

2, Seven-Percent Discount Rate ...............................................................................5 

7-A-i 

EERE-2008-BT-STD-0013 COMMENT 06
Figure 7-A. 4 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 

3, Seven-Percent Discount Rate ...............................................................................5 

Figure 7-A. 5 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 

4, Seven-Percent Discount Rate ...............................................................................6 

Figure 7-A. 6 Cumulative NPV Results for Small, Gas-fired, Hot Water Based on a 

Three-Percent Discount Rate (Billion 2008$) .........................................................6 

Figure 7-A. 7 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 

1, Three-Percent Discount Rate ...............................................................................7 

Figure 7-A. 8 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 

2, Three-Percent Discount Rate ...............................................................................7 

Figure 7-A. 9 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 

3, Three-Percent Discount Rate ...............................................................................8 

Figure 7-A. 10 National Annual Costs and Savings for Small, Gas-fired, Hot Water, 

Level 4, Three-Percent Discount Rate .....................................................................8 

Figure 7-A. 11 Cumulative NPV Results for Small, Gas-fired, Steam, All Except natural 

Draft Based on a Seven-Percent Discount Rate (Billion 2008$) .............................9 

Figure 7-A. 12 National Annual Costs and Savings for Small, Gas-fired, Steam, All 

Except natural Draft, Level 1, Seven-Percent Discount Rate ..................................9 

Figure 7-A. 13 National Annual Costs and Savings for Small, Gas-fired, Steam, All 

Except natural Draft, Level 2, Seven-Percent Discount Rate ................................10 

Figure 7-A. 14 National Annual Costs and Savings for Small, Gas-fired, Steam, All 

Except natural Draft, Level 3, Seven-Percent Discount Rate ................................10 

Figure 7-A. 15 National Annual Costs and Savings for Small, Gas-fired, Steam, All 

Except natural Draft, Level 4, Seven-Percent Discount Rate ................................11 

Figure 7-A. 16 Cumulative NPV Results for Small, Gas-fired, Steam, All Except natural 

Draft Based on a Three-Percent Discount Rate (Billion 2008$) ...........................11 

Figure 7-A. 17 National Annual Costs and Savings for Small, Gas-fired, Steam, All 

Except natural Draft, Level 1, Three-Percent Discount Rate ................................12 

Figure 7-A. 18 National Annual Costs and Savings for Small, Gas-fired, Steam, All 

Except natural Draft, Level 2, Three-Percent Discount Rate ................................12 

Figure 7-A. 19 National Annual Costs and Savings for Small, Gas-fired, Steam, All 

Except natural Draft, Level 3, Three-Percent Discount Rate ................................13 

7-A-ii 

EERE-2008-BT-STD-0013 COMMENT 06
Figure 7-A. 20 National Annual Costs and Savings for Small, Gas-fired, Steam, All 

Except natural Draft, Level 4, Three-Percent Discount Rate ................................13 

Figure 7-A. 21 Cumulative NPV Results for Small, Gas-fired, Steam, Natural Draft 

Based on a Seven-Percent Discount Rate (Billion 2008$) ....................................14 

Figure 7-A. 22 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural 

Draft, Level 1, Seven-Percent Discount Rate ........................................................14 

Figure 7-A. 23 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural 

Draft, Level 2, Seven-Percent Discount Rate ........................................................15 

Figure 7-A. 24 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural 

Draft, Level 3, Seven-Percent Discount Rate ........................................................15 

Figure 7-A. 25 Cumulative NPV Results for Small, Gas-fired, Steam, Natural Draft 

Based on a Three-Percent Discount Rate (Billion 2008$) .....................................16 

Figure 7-A. 26 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural 

Draft, Level 1, Three-Percent Discount Rate .........................................................17 

Figure 7-A. 27 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural 

Draft, Level 2, Three-Percent Discount Rate .........................................................17 

Figure 7-A. 28 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural 

Draft, Level 3, Three-Percent Discount Rate .........................................................18 

Figure 7-A. 29 Cumulative NPV Results for Small, Oil-fired, Hot Water Based on a 

Seven-Percent Discount Rate (Billion 2008$) .......................................................19 

Figure 7-A. 30 National Annual Costs and Savings for Small, Oil-fired, Hot Water, 

Level 1, Seven-Percent Discount Rate ...................................................................19 

Figure 7-A. 31 National Annual Costs and Savings for Small, Oil-fired, Hot Water, 

Level 2, Seven-Percent Discount Rate ...................................................................20 

Figure 7-A. 32 National Annual Costs and Savings for Small, Oil-fired, Hot Water, 

Level 3, Seven-Percent Discount Rate ...................................................................20 

Figure 7-A. 33 Cumulative NPV Results for Small, Oil-fired, Hot Water Based on a 

Three-Percent Discount Rate (Billion 2008$) .......................................................21 

Figure 7-A. 34 National Annual Costs and Savings for Small, Oil-Fired, Hot Water, 

Level 1, Three-Percent Discount Rate ...................................................................22 

Figure 7-A. 35 National Annual Costs and Savings for Small, Oil-fired, Hot Water, 

Level 2, Three-Percent Discount Rate ...................................................................22 

7-A-iii 

EERE-2008-BT-STD-0013 COMMENT 06
Figure 7-A. 36 National Annual Costs and Savings for Small, Oil-fired, Hot Water, 

Level 3, Three-Percent Discount Rate ...................................................................23 

Figure 7-A. 37 Cumulative NPV Results for Small, Oil-fired, Steam Based on a SevenPercent Discount Rate (Billion 2008$) ..................................................................24 

Figure 7-A. 38 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 1, 

Seven-Percent Discount Rate .................................................................................24 

Figure 7-A. 39 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 2, 

Seven-Percent Discount Rate .................................................................................25 

Figure 7-A. 40 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 3, 

Seven-Percent Discount Rate .................................................................................25 

Figure 7-A. 41 Cumulative NPV Results for Small, Oil-fired, Steam Based on a ThreePercent Discount Rate (Billion 2008$) ..................................................................26 

Figure 7-A. 42 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 1, 

Three-Percent Discount Rate .................................................................................27 

Figure 7-A. 43 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 2, 

Three-Percent Discount Rate .................................................................................27 

Figure 7-A. 44 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 3, 

Three-Percent Discount Rate .................................................................................28 

Figure 7-A. 45 Cumulative NPV Results for Large, Gas-fired, Hot Water Based on a 

Seven-Percent Discount Rate (Billion 2008$) .......................................................29 

Figure 7-A. 46 National Annual Costs and Savings for Large, Gas-fired, Hot Water, 

Level 1, Seven-Percent Discount Rate ...................................................................29 

Figure 7-A. 47 National Annual Costs and Savings for Large, Gas-fired, Hot Water, 

Level 2, Seven-Percent Discount Rate ...................................................................30 

Figure 7-A. 48 National Annual Costs and Savings for Large, Gas-fired, Hot Water, 

Level 3, Seven-Percent Discount Rate ...................................................................30 

Figure 7-A. 49 National Annual Costs and Savings for Large, Gas-fired, Hot Water, 

Level 4, Seven-Percent Discount Rate ...................................................................31 

Figure 7-A. 50 Cumulative NPV Results for Large, Gas-fired, Hot Water Based on a 

Three-Percent Discount Rate (Billion 2008$) .......................................................31 

Figure 7-A. 51 National Annual Costs and Savings for Large, Gas-fired, Hot Water, 

Level 1, Three-Percent Discount Rate ...................................................................32 

7-A-iv 

EERE-2008-BT-STD-0013 COMMENT 06
Figure 7-A. 52 National Annual Costs and Savings for Large, Gas-fired, Hot Water, 

Level 2, Three-Percent Discount Rate ...................................................................32 

Figure 7-A. 53 National Annual Costs and Savings for Large, Gas-fired, Hot Water, 

Level 3, Three-Percent Discount Rate ...................................................................33 

Figure 7-A. 54 National Annual Costs and Savings for Large, Gas-fired, Hot Water, 

Level 4, Three-Percent Discount Rate ...................................................................33 

Figure 7-A. 55 Cumulative NPV Results for Large, Gas-fired, Steam, All Except Natural 

Draft Based on a Seven-Percent Discount Rate (Billion 2008$) ...........................34 

Figure 7-A. 56 National Annual Costs and Savings for Large, Gas-fired, Steam, All 

Except Natural Draft, Level 1, Seven-Percent Discount Rate ...............................35 

Figure 7-A. 57 National Annual Costs and Savings for Large, Gas-fired, Steam, All 

Except Natural Draft, Level 2, Seven-Percent Discount Rate ...............................35 

Figure 7-A. 58 National Annual Costs and Savings for Large, Gas-fired, Steam, All 

Except Natural Draft, Level 3, Seven-Percent Discount Rate ...............................36 

Figure 7-A. 59 National Annual Costs and Savings for Large, Gas-fired, Steam, All 

Except Natural Draft, Level 4, Seven-Percent Discount Rate ...............................36 

Figure 7-A. 60 Cumulative NPV Results for Large, Gas-fired, Steam, All Except Natural 

Draft Based on a Three-Percent Discount Rate (Billion 2008$) ...........................37 

Figure 7-A. 61 National Annual Costs and Savings for Large, Gas-fired, Steam, All 

Except Natural Draft, Level 1, Three-Percent Discount Rate ...............................37 

Figure 7-A. 62 National Annual Costs and Savings for Large, Gas-fired, Steam, All 

Except Natural Draft, Level 2, Three-Percent Discount Rate ...............................38 

Figure 7-A. 63 National Annual Costs and Savings for Large, Gas-fired, Steam, All 

Except Natural Draft, Level 3, Three-Percent Discount Rate ...............................38 

Figure 7-A. 64 National Annual Costs and Savings for Large, Gas-fired, Steam, All 

Except Natural Draft, Level 4, Three-Percent Discount Rate ...............................39 

Figure 7-A. 65 Cumulative NPV Results for Large, Gas-fired, Steam, Natural Draft 

Based on a Seven-Percent Discount Rate (Billion 2008$) ....................................40 

Figure 7-A. 66 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural 

Draft, Level 1, Seven-Percent Discount Rate ........................................................40 

Figure 7-A. 67 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural 

Draft, Level 2, Seven-Percent Discount Rate ........................................................41 

7-A-v 

EERE-2008-BT-STD-0013 COMMENT 06
Figure 7-A. 68 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural 

Draft, Level 3, Seven-Percent Discount Rate ........................................................41 

Figure 7-A. 69 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural 

Draft, Level 4, Seven-Percent Discount Rate ........................................................42 

Figure 7-A. 70 Cumulative NPV Results for Large, Gas-fired, Steam, Natural Draft 

Based on a Three-Percent Discount Rate (Billion 2008$) .....................................42 

Figure 7-A. 71 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural 

Draft, Level 1, Three-Percent Discount Rate .........................................................43 

Figure 7-A. 72 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural 

Draft, Level 2, Three-Percent Discount Rate .........................................................43 

Figure 7-A. 73 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural 

Draft, Level 3, Three-Percent Discount Rate .........................................................44 

Figure 7-A. 74 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural 

Draft, Level 4, Three-Percent Discount Rate .........................................................44 

Figure 7-A. 75 Cumulative NPV Results for Large, Oil-fired, Hot Water Based on a 

Seven-Percent Discount Rate (Billion 2008$) .......................................................45 

Figure 7-A. 76 National Annual Costs and Savings for Large, Oil-fired, Hot Water, 

Level 1, Seven-Percent Discount Rate ...................................................................45 

Figure 7-A. 77 National Annual Costs and Savings for Large, Oil-fired, Hot Water, 

Level 2, Seven-Percent Discount Rate ...................................................................46 

Figure 7-A. 78 National Annual Costs and Savings for Large, Oil-fired, Hot Water, 

Level 3, Seven-Percent Discount Rate ...................................................................46 

Figure 7-A. 79 Cumulative NPV Results for Large, Oil-fired, Hot Water Based on a 

Three-Percent Discount Rate (Billion 2008$), Three-Percent Discount 

Rate ........................................................................................................................47 

Figure 7-A. 80 National Annual Costs and Savings for Large, Oil-fired, Hot Water, 

Level 1, Three-Percent Discount Rate ...................................................................48 

Figure 7-A. 81 National Annual Costs and Savings for Large, Oil-fired, Hot Water, 

Level 2, Three-Percent Discount Rate ...................................................................48 

Figure 7-A. 82 National Annual Costs and Savings for Large, Oil-fired, Hot Water, 

Level 3, Three-Percent Discount Rate ...................................................................49 

Figure 7-A. 83 Cumulative NPV Results for Large, Oil-fired, Steam Based on a SevenPercent iscount Rate (Billion 2008$) .....................................................................50 

7-A-vi 

EERE-2008-BT-STD-0013 COMMENT 06
7-A-vii 

Figure 7-A. 84 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 1, 

Seven-Percent Discount Rate .................................................................................50 

Figure 7-A. 85 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 2, 

Seven-Percent Discount Rate .................................................................................51 

Figure 7-A. 86 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 3, 

Seven-Percent Discount Rate .................................................................................51 

Figure 7-A. 87 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 4, 

Seven-Percent Discount Rate .................................................................................52 

Figure 7-A. 88 Cumulative NPV Results for Large, Oil-fired, Steam Based on a ThreePercent Discount Rate (Billion 2008$) ..................................................................52 

Figure 7-A. 89 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 1, 

Three-Percent Discount Rate .................................................................................53 

Figure 7-A. 90 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 2, 

Three-Percent Discount Rate .................................................................................53 

Figure 7-A. 91 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 3, 

Three-Percent Discount Rate .................................................................................54 

Figure 7-A. 92 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 4, 

Three-Percent Discount Rate .................................................................................54 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.1 INTRODUCTION 

 Appendix 7-A contains detailed output results from the National Energy 

Savings/National Economic Impact spreadsheet model. Results are presented for each 

equipment class in terms of cumulative energy savings (source) and cumulative net 

present value at each trial standard level and at a national level. 

See Chapter 7 for an explanation of the figures in this appendix 

7-A.2 NATIONAL ENERGY SAVINGS AND NATIONAL NET PRESENT 

VALUE RESULTS CALCULATED FROM THE MARKET BASELINE 

Tables 7-A.1 through 7-A.3 show the national energy savings and national net present 

value results from the NIA spreadsheet as calculated above the market baseline. As 

discussed in chapter 7, the subtraction of the impacts benefits from adoption of standards 

consistent with the ASHRAE 90.1-2007 levels in 2012 (impacts calculated from the 

market baseline) from the impacts benefits determined for adoption of higher standards 

(also calculated from the market baseline) allows determination of the net impacts for 

adoption of higher standards when compared with the adoption of standards at the 

ASHRAE 90.1-2007 baseline. 

Table 7-A.1 Cumulative National Energy Savings for Commercial Boiler 

Equipment (2012-2042) (Quadrillion Btu) by Equipment Class 

Equipment Class Level 0 (ASHRAE)* Level 1 Level 2 Level 3 Level 4 

Small, Gas-fired, Hot 

Water 

0.013 0.035 0.085 0.153 0.225 

Small, Gas-fired, Steam, 

All Except natural Draft 

0.001 0.001 0.015 0.030 0.046 

Small, Gas-fired, Steam, 

Natural Draft 

0.038 0.032 0.054 0.080 na 

Small, Oil-fired, Hot 

Water 

0.010 0.025 0.044 0.066 na 

Small, Oil-fired, Steam 0.005 0.014 0.031 0.073 na 

Large, Gas-fired, Hot 

Water 

0.006 0.020 0.043 0.067 0.182 

Large, Gas-fired, Steam, 

All Except Natural 

Draft 

0.004 0.025 0.066 0.108 0.151 

Large, Gas-fired, Steam, 

Natural Draft 

0.029 0.007 0.031 0.061 0.096 

Large, Gas-fired, Hot 

Water 

0.000 0.014 0.024 0.034 na 

Large, Oil-fired, Steam 0.000 0.039 0.106 0.198 0.410 

 * 0.000 indicates savings are less than 0.0005 quadrillion Btu. na means that this efficiency level was not available for analysis 

7-A-1 

EERE-2008-BT-STD-0013 COMMENT 06
Table 7-A.2 Cumulative NPV Results Based on a Seven Percent Discount Rate 

(Billion 2008$) by Equipment Class 

Equipment Class Level 0 (ASHRAE)* Level 1 Level 2 Level 3 Level 4 

Small, Gas-fired, Hot 

Water 

$0.046 $0.031 $0.034 ($0.124) ($0.504) 

Small, Gas-fired, Steam, 

All Except natural Draft 

$0.002 ($0.036 ($0.039) ($0.080) ($0.112) 

Small, Gas-fired, Steam, 

Natural Draft 

$0.041 $0.004 $0.025 $0.013 na 

Small, Oil-fired, Hot 

Water 

$0.038 $0.030 $0.037 ($0.004) na 

Small, Oil-fired, Steam $0.018 ($0.013) ($0.023) ($0.069) na 

Large, Gas-fired, Hot 

Water 

$0.020 $0.031 $0.047 $0.022 ($0.076) 

Large, Gas-fired, Steam, 

All Except Natural 

Draft 

$0.012 $0.039 $0.139 $0.237 $0.333 

Large, Gas-fired, Steam, 

Natural Draft 

$0.062 $0.009 $0.041 $0.050 $0.018 

Large, Gas-fired, Hot 

Water 

$0.037 $0.079 $0.109 $0.100 na 

Large, Oil-fired, Steam $0.000 $0.062 $0.183 $0.247 $0.501 

* 0.000 indicates savings are less than $0.0005 billion. na means that this efficiency level was not available for analysis. Negative 

values shown in parentheses.

Table 7-A.3 Cumulative NPV Results based on a Three percent Discount Rate 

(Billion 2008$) by Equipment Class 

Equipment Class Level 0 (ASHRAE)* Level 1 Level 2 Level 3 Level 4 

Small, Gas-fired, Hot 

Water 

$0.156 $0.233 $0.426 $0.291 ($0.377) 

Small, Gas-fired, Steam, 

All Except natural Draft 

$0.007 ($0.069) ($0.007) ($0.029) ($0.046) 

Small, Gas-fired, Steam, 

Natural Draft 

$0.270 $0.171 $0.311 $0.394 NA 

Small, Oil-fired, Hot 

Water 

$0.117 $0.170 $0.253 $0.236 NA 

Small, Oil-fired, Steam $0.056 $0.033 $0.069 $0.101 NA 

Large, Gas-fired, Hot 

Water 

$0.068 $0.161 $0.289 $0.324 $0.540 

Large, Gas-fired, Steam, 

All Except Natural Draft 

$0.041 $0.207 $0.616 $1.024 $1.431 

Large, Gas-fired, Steam, 

Natural Draft 

$0.311 $0.054 $0.230 $0.387 $0.484 

Large, Gas-fired, Hot 

Water 

$0.071 $0.216 $0.313 $0.332 NA 

Large, Oil-fired, Steam $0.000 $0.302 $0.829 $1.324 $2.692 

* 0.000 indicates savings are less than $0.0005 billion. na means that this efficiency level was not available for analysis. Negative 

values shown in parentheses. 

7-A-2 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3 DETAILED NATIONAL ENERGY SAVINGS AND NATIONAL NET 

VALUE RESULTS GRAPHICS 

Figures 7-A.1 through 7-A.92 show the cumulative national energy savings and national 

net present value results at both seven percent and three percent discount rates as well as 

show the annual operating cost savings and annual equipment costs (shown as negative 

savings) for each year from 2012-2085 for each efficiency level treated as a potential 

standard level. The results shown here represent the impacts for adoption of boiler 

standards higher than the levels specified in ASHRAE 90.1-2007. 

7-A-3 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.1 SMALL GAS-FIRED HOT WATER BOILER 

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.05

0.1

0.15

0.2

0.25

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.05

0.1

0.15

0.2

0.25

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.05

0.1

0.15

0.2

0.25

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 1 Cumulative NPV Results for Small, Gas-fired, Hot Water Based on a Seven-Percent 

Discount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 2 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 1, SevenPercent Discount Rate 

7-A-4 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 3 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 2, SevenPercent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 4 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 3, SevenPercent Discount Rate 

7-A-5 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 4

Net Savings

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 5 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 4, SevenPercent Discount Rate 

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.05

0.1

0.15

0.2

0.25

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.05

0.1

0.15

0.2

0.25

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.05

0.1

0.15

0.2

0.25

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 6 Cumulative NPV Results for Small, Gas-fired, Hot Water Based on a Three-Percent 

Discount Rate (Billion 2008$) 

7-A-6 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 7 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 1, ThreePercent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 8 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 2, ThreePercent Discount Rate 

7-A-7 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 9 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 3, ThreePercent Discount Rate 

Efficiency Level

Level 4

Net Savings

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 10 National Annual Costs and Savings for Small, Gas-fired, Hot Water, Level 4, ThreePercent Discount Rate 

7-A-8 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.2 SMALL GAS-FIRED STEAM ALL EXCEPT NATURAL DRAFT 

BOILER 

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

0.05

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

0.045

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

0.05

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

0.045

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

0.05

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

0.045

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

0.05

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.12

-0.1

-0.08

-0.06

-0.04

-0.02

0

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 11 Cumulative NPV Results for Small, Gas-fired, Steam, All Except natural Draft Based 

on a Seven-Percent Discount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.008

-0.007

-0.006

-0.005

-0.004

-0.003

-0.002

-0.001

0

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.008

-0.007

-0.006

-0.005

-0.004

-0.003

-0.002

-0.001

0

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.008

-0.007

-0.006

-0.005

-0.004

-0.003

-0.002

-0.001

0

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.008

-0.007

-0.006

-0.005

-0.004

-0.003

-0.002

-0.001

0

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 12 National Annual Costs and Savings for Small, Gas-fired, Steam, All Except natural 

Draft, Level 1, Seven-Percent Discount Rate 

7-A-9 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 13 National Annual Costs and Savings for Small, Gas-fired, Steam, All Except natural 

Draft, Level 2, Seven-Percent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 14 National Annual Costs and Savings for Small, Gas-fired, Steam, All Except natural 

Draft, Level 3, Seven-Percent Discount Rate 

7-A-10 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 4

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 15 National Annual Costs and Savings for Small, Gas-fired, Steam, All Except natural 

Draft, Level 4, Seven-Percent Discount Rate 

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

0.05

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

0.045

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

0.05

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

0.045

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

0.05

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

0.045

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

0.05

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.08

-0.07

-0.06

-0.05

-0.04

-0.03

-0.02

-0.01

0

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 16 Cumulative NPV Results for Small, Gas-fired, Steam, All Except natural Draft Based 

on a Three-Percent Discount Rate (Billion 2008$) 

7-A-11 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.008

-0.007

-0.006

-0.005

-0.004

-0.003

-0.002

-0.001

0

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.008

-0.007

-0.006

-0.005

-0.004

-0.003

-0.002

-0.001

0

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.008

-0.007

-0.006

-0.005

-0.004

-0.003

-0.002

-0.001

0

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.008

-0.007

-0.006

-0.005

-0.004

-0.003

-0.002

-0.001

0

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 17 National Annual Costs and Savings for Small, Gas-fired, Steam, All Except natural 

Draft, Level 1, Three-Percent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 18 National Annual Costs and Savings for Small, Gas-fired, Steam, All Except natural 

Draft, Level 2, Three-Percent Discount Rate 

7-A-12 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 19 National Annual Costs and Savings for Small, Gas-fired, Steam, All Except natural 

Draft, Level 3, Three-Percent Discount Rate 

Efficiency Level

Level 4

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 20 National Annual Costs and Savings for Small, Gas-fired, Steam, All Except natural 

Draft, Level 4, Three-Percent Discount Rate 

7-A-13 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.3 SMALL GAS-FIRED STEAM NATURAL DRAFT BOILER 

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.01

0

0.01

0.02

0.03

0.04

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.01

0

0.01

0.02

0.03

0.04

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.01

0

0.01

0.02

0.03

0.04

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.04

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 21 Cumulative NPV Results for Small, Gas-fired, Steam, Natural Draft Based on a 

Seven-Percent Discount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.012

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

0.008

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.012

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

0.008

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.012

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

0.008

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.012

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

0.008

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 22 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural Draft, Level 

1, Seven-Percent Discount Rate 

7-A-14 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 23 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural Draft, Level 

2, Seven-Percent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 24 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural Draft, Level 

3, Seven-Percent Discount Rate 

7-A-15 

EERE-2008-BT-STD-0013 COMMENT 06
Note: There is no Level 4 for this product class 

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.01

0

0.01

0.02

0.03

0.04

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.01

0

0.01

0.02

0.03

0.04

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.01

0

0.01

0.02

0.03

0.04

0.05

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 25 Cumulative NPV Results for Small, Gas-fired, Steam, Natural Draft Based on a 

Three-Percent Discount Rate (Billion 2008$) 

7-A-16 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.012

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

0.008

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.012

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

0.008

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.012

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

0.008

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.012

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

0.008

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 26 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural Draft, Level 

1, Three-Percent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 27 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural Draft, Level 

2, Three-Percent Discount Rate 

7-A-17 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 28 National Annual Costs and Savings for Small, Gas-fired, Steam, Natural Draft, Level 

3, Three-Percent Discount Rate 

Note: There is no Level 4 for this product class 

7-A-18 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.4 SMALL OIL-FIRED HOT WATER BOILER 

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.045

-0.04

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 29 Cumulative NPV Results for Small, Oil-fired, Hot Water Based on a Seven-Percent 

Discount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 30 National Annual Costs and Savings for Small, Oil-fired, Hot Water, Level 1, SevenPercent Discount Rate 

7-A-19 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 31 National Annual Costs and Savings for Small, Oil-fired, Hot Water, Level 2, SevenPercent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 32 National Annual Costs and Savings for Small, Oil-fired, Hot Water, Level 3, SevenPercent Discount Rate 

7-A-20 

EERE-2008-BT-STD-0013 COMMENT 06
Note: There is no Level 4 for this product class 

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 33 Cumulative NPV Results for Small, Oil-fired, Hot Water Based on a Three-Percent 

Discount Rate (Billion 2008$) 

7-A-21 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 34 National Annual Costs and Savings for Small, Oil-Fired, Hot Water, Level 1, ThreePercent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 35 National Annual Costs and Savings for Small, Oil-fired, Hot Water, Level 2, ThreePercent Discount Rate 

7-A-22 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 36 National Annual Costs and Savings for Small, Oil-fired, Hot Water, Level 3, ThreePercent Discount Rate 

Note: There is no Level 4 for this product class 

7-A-23 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.5 SMALL OIL-FIRED STEAM BOILER 

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.09

-0.08

-0.07

-0.06

-0.05

-0.04

-0.03

-0.02

-0.01

0

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 37 Cumulative NPV Results for Small, Oil-fired, Steam Based on a Seven-Percent 

Discount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 38 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 1, SevenPercent Discount Rate 

7-A-24 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 39 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 2, SevenPercent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 40 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 3, SevenPercent Discount Rate 

7-A-25 

EERE-2008-BT-STD-0013 COMMENT 06
Note: There is no Level 4 for this product class 

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 41 Cumulative NPV Results for Small, Oil-fired, Steam Based on a Three-Percent 

Discount Rate (Billion 2008$) 

7-A-26 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 42 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 1, ThreePercent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 43 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 2, ThreePercent Discount Rate 

7-A-27 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 44 National Annual Costs and Savings for Small, Oil-fired, Steam, Level 3, ThreePercent Discount Rate 

Note: There is no Level 4 for this product class 

7-A-28 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.6 LARGE GAS-FIRED HOT WATER BOILER 

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 45 Cumulative NPV Results for Large, Gas-fired, Hot Water Based on a Seven-Percent 

Discount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 46 National Annual Costs and Savings for Large, Gas-fired, Hot Water, Level 1, SevenPercent Discount Rate 

7-A-29 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 47 National Annual Costs and Savings for Large, Gas-fired, Hot Water, Level 2, SevenPercent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 48 National Annual Costs and Savings for Large, Gas-fired, Hot Water, Level 3, SevenPercent Discount Rate 

7-A-30 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 4

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 49 National Annual Costs and Savings for Large, Gas-fired, Hot Water, Level 4, SevenPercent Discount Rate 

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

0.20

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.1

0.2

0.3

0.4

0.5

0.6

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 50 Cumulative NPV Results for Large, Gas-fired, Hot Water Based on a Three-Percent 

Discount Rate (Billion 2008$) 

7-A-31 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 51 National Annual Costs and Savings for Large, Gas-fired, Hot Water, Level 1, ThreePercent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 52 National Annual Costs and Savings for Large, Gas-fired, Hot Water, Level 2, ThreePercent Discount Rate 

7-A-32 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 53 National Annual Costs and Savings for Large, Gas-fired, Hot Water, Level 3, ThreePercent Discount Rate 

Efficiency Level

Level 4

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 54 National Annual Costs and Savings for Large, Gas-fired, Hot Water, Level 4, ThreePercent Discount Rate 

7-A-33 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.7 LARGE GAS-FIRED STEAM ALL EXCEPT NATURAL DRAFT 

BOILER 

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 55 Cumulative NPV Results for Large, Gas-fired, Steam, All Except Natural Draft 

Based on a Seven-Percent Discount Rate (Billion 2008$) 

7-A-34 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 56 National Annual Costs and Savings for Large, Gas-fired, Steam, All Except Natural 

Draft, Level 1, Seven-Percent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 57 National Annual Costs and Savings for Large, Gas-fired, Steam, All Except Natural 

Draft, Level 2, Seven-Percent Discount Rate 

7-A-35 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 58 National Annual Costs and Savings for Large, Gas-fired, Steam, All Except Natural 

Draft, Level 3, Seven-Percent Discount Rate 

Efficiency Level

Level 4

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 59 National Annual Costs and Savings for Large, Gas-fired, Steam, All Except Natural 

Draft, Level 4, Seven-Percent Discount Rate 

7-A-36 

EERE-2008-BT-STD-0013 COMMENT 06
Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 60 Cumulative NPV Results for Large, Gas-fired, Steam, All Except Natural Draft 

Based on a Three-Percent Discount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 61 National Annual Costs and Savings for Large, Gas-fired, Steam, All Except Natural 

Draft, Level 1, Three-Percent Discount Rate 

7-A-37 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 62 National Annual Costs and Savings for Large, Gas-fired, Steam, All Except Natural 

Draft, Level 2, Three-Percent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 63 National Annual Costs and Savings for Large, Gas-fired, Steam, All Except Natural 

Draft, Level 3, Three-Percent Discount Rate 

7-A-38 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 4

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 64 National Annual Costs and Savings for Large, Gas-fired, Steam, All Except Natural 

Draft, Level 4, Three-Percent Discount Rate 

7-A-39 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.8 LARGE GAS-FIRED STEAM NATURAL DRAFT BOILER 

Cumulative Source Energy Savings and NPV

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.06

-0.05

-0.04

-0.03

-0.02

-0.01

0

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 65 Cumulative NPV Results for Large, Gas-fired, Steam, Natural Draft Based on a 

Seven-Percent Discount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 66 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural Draft, Level 

1, Seven-Percent Discount Rate 

7-A-40 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 67 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural Draft, Level 

2, Seven-Percent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 68 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural Draft, Level 

3, Seven-Percent Discount Rate 

7-A-41 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 4

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 69 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural Draft, Level 

4, Seven-Percent Discount Rate 

Cumulative Source Energy Savings and NPV

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

-0.03

-0.02

-0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 70 Cumulative NPV Results for Large, Gas-fired, Steam, Natural Draft Based on a 

Three-Percent Discount Rate (Billion 2008$) 

7-A-42 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.035

-0.03

-0.025

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 71 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural Draft, Level 

1, Three-Percent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.008

-0.006

-0.004

-0.002

0

0.002

0.004

0.006

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 72 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural Draft, Level 

2, Three-Percent Discount Rate 

7-A-43 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.015

-0.01

-0.005

0

0.005

0.01

0.015

0.02

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 73 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural Draft, Level 

3, Three-Percent Discount Rate 

Efficiency Level

Level 4

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.05

-0.04

-0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 74 National Annual Costs and Savings for Large, Gas-fired, Steam, Natural Draft, Level 

4, Three-Percent Discount Rate 

7-A-44 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.9 LARGE OIL-FIRED HOT WATER BOILER 

Cumulative Source Energy Savings and NPV

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 75 Cumulative NPV Results for Large, Oil-fired, Hot Water Based on a Seven-Percent 

Discount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.004

-0.002

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.004

-0.002

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.004

-0.002

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.004

-0.002

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 76 National Annual Costs and Savings for Large, Oil-fired, Hot Water, Level 1, SevenPercent Discount Rate 

7-A-45 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 77 National Annual Costs and Savings for Large, Oil-fired, Hot Water, Level 2, SevenPercent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 78 National Annual Costs and Savings for Large, Oil-fired, Hot Water, Level 3, SevenPercent Discount Rate 

7-A-46 

EERE-2008-BT-STD-0013 COMMENT 06
Note: There is no Level 4 for this product class 

Cumulative Source Energy Savings and NPV

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

NPV (Billion 2007$)

Energy Savings NPV

u

Cumulative Source Energy Savings and NPV

0.00

0.01

0.01

0.02

0.02

0.03

0.03

0.04

0.04

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.05

0.1

0.15

0.2

0.25

0.3

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 79 Cumulative NPV Results for Large, Oil-fired, Hot Water Based on a Three-Percent 

Discount Rate (Billion 2008$), Three-Percent Discount Rate 

7-A-47 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.004

-0.002

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.004

-0.002

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.004

-0.002

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.004

-0.002

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 80 National Annual Costs and Savings for Large, Oil-fired, Hot Water, Level 1, ThreePercent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.005

0

0.005

0.01

0.015

0.02

0.025

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 81 National Annual Costs and Savings for Large, Oil-fired, Hot Water, Level 2, ThreePercent Discount Rate 

7-A-48 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.01

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 82 National Annual Costs and Savings for Large, Oil-fired, Hot Water, Level 3, ThreePercent Discount Rate 

Note: There is no Level 4 for this product class 

7-A-49 

EERE-2008-BT-STD-0013 COMMENT 06
7-A.3.10 LARGE OIL-FIRED STEAM BOILER 

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.1

0.2

0.3

0.4

0.5

0.6

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 83 Cumulative NPV Results for Large, Oil-fired, Steam Based on a Seven-Percent 

iscount Rate (Billion 2008$) 

Efficiency Level

Level 1

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 84 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 1, SevenPercent Discount Rate 

7-A-50 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 2

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 85 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 2, SevenPercent Discount Rate 

Efficiency Level

Level 3

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

0.2

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

0.2

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

0.2

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

0.2

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 86 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 3, SevenPercent Discount Rate 

7-A-51 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 4

Net Savings

-0.2

-0.1

0

0.1

0.2

0.3

0.4

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.2

-0.1

0

0.1

0.2

0.3

0.4

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.2

-0.1

0

0.1

0.2

0.3

0.4

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.2

-0.1

0

0.1

0.2

0.3

0.4

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 87 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 4, SevenPercent Discount Rate 

Cumulative Source Energy Savings and NPV

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

Level 1

Level 2

Level 3

Level 4

Efficiency Level

Cumulative Energy Savings (Quads)

0

0.5

1

1.5

2

2.5

3

NPV (Billion 2008$)

Energy Savings NPV

u

Figure 7-A. 88 Cumulative NPV Results for Large, Oil-fired, Steam Based on a Three-Percent 

Discount Rate (Billion 2008$) 

7-A-52 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 1

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 89 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 1, ThreePercent Discount Rate 

Efficiency Level

Level 2

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0.12

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 90 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 2, ThreePercent Discount Rate 

7-A-53 

EERE-2008-BT-STD-0013 COMMENT 06
Efficiency Level

Level 3

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

0.2

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

0.2

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

0.2

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.1

-0.05

0

0.05

0.1

0.15

0.2

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 91 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 3, ThreePercent Discount Rate 

Efficiency Level

Level 4

Net Savings

-0.2

-0.1

0

0.1

0.2

0.3

0.4

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Select efficiency level to plot Annual 

Net Impacts trend.

Net Savings

-0.2

-0.1

0

0.1

0.2

0.3

0.4

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.2

-0.1

0

0.1

0.2

0.3

0.4

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2007$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Net Savings

-0.2

-0.1

0

0.1

0.2

0.3

0.4

2012 2020 2028 2036 2044 2052 2060 2068 2076 2084

Year

Billion 2008$

Undiscounted Total Annual Operating Savings

Undiscounted Annual Equipment Purchase Savings

Discounted Total Net Annual Impact

Figure 7-A. 92 National Annual Costs and Savings for Large, Oil-fired, Steam, Level 4, ThreePercent Discount Rate 

7-A-54 

EERE-2008-BT-STD-0013 COMMENT 06