6B-i 

APPENDIX 6B. DETAILED LIFE-CYCLE COST AND PAYBACK PERIOD 

ANALYSIS RESULTS

TABLE OF CONTENTS

6B.1 INTRODUCTION .........................................................................................................6B-1

6B.2 LIFE-CYCLE COST AND PAYBACK PERIOD RESULTS ......................................6B-2

6B.2.1 Life-Cycle Cost Results for Air Cooled <65 kBtu.............................................6B-2

6B.2.2 Life-Cycle Cost Results for Air Cooled 65–240 kBtu ......................................6B-4

6B.2.3 Life-Cycle Cost Results for Air Cooled > 240 kBtu..........................................6B-6

6B.2.4 Life-Cycle Cost Results for Water Cooled <65 kBtu ........................................6B-8

6B.2.5 Life-Cycle Cost Results for Water Cooled 65–240 kBtu ................................6B-10

6B.2.6 Life-Cycle Cost Results for Water Cooled > 240 kBtu ...................................6B-12

6B.2.7 Life-Cycle Cost Results for Water Cooled w/ FE <65 kBtu ...........................6B-14

6B.2.8 Life-Cycle Cost Results for Water Cooled w/ FE 65–240 kBtu ......................6B-16

6B.2.9 Life-Cycle Cost Results for Water Cooled w/ FE > 240 kBtu ........................6B-18

6B.2.10 Life-Cycle Cost Results for Glycol Cooled <65 kBtu ...................................6B-20

6B.2.11 Life-Cycle Cost Results for Glycol Cooled 65–240 kBtu ..............................6B-22

6B.2.12 Life-Cycle Cost Results for Glycol Cooled > 240 kBtu ................................6B-24

6B.2.13 Life-Cycle Cost Results for Glycol Cooled w/ FE <65 kBtu .........................6B-26

6B.2.14 Life-Cycle Cost Results for Glycol Cooled w/ FE 65–240 kBtu ...................6B-28

6B.2.15 Life-Cycle Cost Results for Glycol Cooled w/ FE > 240 kBtu ......................6B-30

LIST OF TABLES

Table 6B.2.1 LCC Results for Air Cooled <65 kBtu .................................................................6B-2

Table 6B.2.2 LCC Results for Air Cooled 65–240 kBtu ...........................................................6B-4

Table 6B.2.3 LCC Results for Air Cooled > 240 kBtu ..............................................................6B-6

Table 6B.2.4 LCC Results for Water Cooled <65 kBtu ............................................................6B-8

Table 6B.2.5 LCC Results for Water Cooled 65–240 kBtu ....................................................6B-10

Table 6B.2.6 LCC Results for Water Cooled > 240 kBtu .......................................................6B-12

Table 6B.2.7 LCC Results for Water Cooled w/ FE <65 kBtu................................................6B-14

Table 6B.2.8 LCC Results for Water Cooled w/ FE 65–240 kBtu ..........................................6B-16

Table 6B.2.9 LCC Results for Water Cooled w/ FE > 240 kBtu.............................................6B-18

Table 6B.2.10 LCC Results for Glycol Cooled <65 kBtu .......................................................6B-20

Table 6B.2.11 LCC Results for Glycol Cooled 65–240 kBtu .................................................6B-22

Table 6B.2.12 LCC Results for Glycol Cooled > 240 kBtu ....................................................6B-24

Table 6B.2.13 LCC Results for Glycol Cooled w/ FE <65 kBtu. ...........................................6B-26

Table 6B.2.14 LCC Results for Glycol Cooled w/ FE 65–240 kBtu .......................................6B-28

Table 6B.2.15 LCC Results for Glycol Cooled w/ FE > 240 kBtu .........................................6B-30
6B-ii

LIST OF FIGURES

Figure 6B.2.1 LCC Results for Air Cooled <65 kBtu ...............................................................6B-2

Figure 6B.2.2 PBP Results for Air Cooled <65 kBtu ................................................................6B-3

Figure 6B.2.3 LCC Results for Air Cooled 65–240 kBtu..........................................................6B-4

Figure 6B.2.4 PBP Results for Air Cooled 65–240 kBtu ..........................................................6B-5

Figure 6B.2.5 LCC Results for Air Cooled > 240 kBtu ............................................................6B-6

Figure 6B.2.6 PBP Results for Air Cooled > 240 kBtu .............................................................6B-7

Figure 6B.2.7 LCC Results for Water Cooled <65 kBtu ...........................................................6B-8

Figure 6B.2.8 PBP Results for Water Cooled <65 kBtu ...........................................................6B-9

Figure 6B.2.9 LCC Results for Water Cooled 65–240 kBtu ...................................................6B-10

Figure 6B.2.10 PBP Results for Water Cooled 65–240 kBtu ..................................................6B-11

Figure 6B.2.11 LCC Results for Water Cooled > 240 kBtu ....................................................6B-12

Figure 6B.2.12 PBP Results for Water Cooled > 240 kBtu ....................................................6B-13

Figure 6B.2.13 LCC Results for Water Cooled w/ FE <65 kBtu ............................................6B-14

Figure 6B.2.14 PBP Results for Water Cooled w/ FE <65 kBtu .............................................6B-15

Figure 6B.2.15 LCC Results for Water Cooled w/ FE 65–240 kBtu ......................................6B-16

Figure 6B.2.16 PBP Results for Water Cooled w/ FE 65–240 kBtu .......................................6B-17

Figure 6B.2.17 LCC Results for Water Cooled w/ FE > 240 kBtu .........................................6B-18

Figure 6B.2.18 PBP Results for Water Cooled w/ FE > 240 kBtu ..........................................6B-19

Figure 6B.2.19 LCC Results for Glycol Cooled <65 kBtu ......................................................6B-20

Figure 6B.2.20 PBP Results for Glycol Cooled <65 kBtu ......................................................6B-21

Figure 6B.2.21 LCC Results for Glycol Cooled 65–240 kBtu ................................................6B-22

Figure 6B.2.22 PBP Results for Glycol Cooled 65–240 kBtu .................................................6B-23

Figure 6B.2.23 LCC Results for Glycol Cooled > 240 kBtu ...................................................6B-24

Figure 6B.2.24 PBP Results for Glycol Cooled > 240 kBtu ...................................................6B-25

Figure 6B.2.25 LCC Results for Glycol Cooled w/ FE <65 kBtu ...........................................6B-26

Figure 6B.2.26 PBP Results for Glycol Cooled w/ FE <65 kBtu ............................................6B-27

Figure 6B.2.27 LCC Results for Glycol Cooled w/ FE 65–240 kBtu .....................................6B-28

Figure 6B.2.28 PBP Results for Glycol Cooled w/ FE 65–240 kBtu ......................................6B-29

Figure 6B.2.29 LCC Results for Glycol Cooled w/ FE > 240 kBtu ........................................6B-30

Figure 6B.2.30 PBP Results for Glycol Cooled w/ FE > 240 kBtu .........................................6B-31
6B-1 

APPENDIX 6B. DETAILED LIFE-CYCLE COST AND PAYBACK PERIOD 

ANALYSIS RESULTS

6B.1 INTRODUCTION

This appendix contains detailed output from the life-cycle cost (LCC) analysis for 

computer room air-conditioning (CRAC) equipment as developed using the LCC spreadsheet. 

LCCs and payback periods (PBPs) are presented for each of the 15 equipment classes at each 

efficiency level. See chapter 6 of the TSD for an explanation of the LCC spreadsheet. 

LCC savings output obtained from the LCC analysis are in the form of distributions. LCC 

savings distributions were generated by performing 5,000 separate simulations using the LCC 

spreadsheet, and allowing the spreadsheet to select values for numerous inputs given probability 

distributions for each input. Given the results of the LCC model simulations, for each equipment 

class, the U.S. Department of Energy (DOE) calculated summary statistics at each efficiency 

level. These include average values for LCC, product installation costs and operating costs; 

average LCC savings; the percentage of customers who: (1) receive benefits in the form of lower 

LCC results; (2) are not affected by the standards; or (3) experience a cost in the form of 

increased LCC from equipment ownership; and finally, median payback periods for the 

efficiency investments. Results of the LCC and accompanying PBP analyses are shown in the 

tables in this appendix. 

Also included in this appendix are two graphical presentations for each of the LCC and 

PBP results. One plots LCC savings distributions for all equipment classes analyzed. The figures 

illustrate the mean and median values on the plot with the help of red and blue markers, 

respectively. Additionally, the mean and median values are surrounded by rectangular boxes 

used to represent the 25th and 75th percentile values. The lower edge of the elongated rectangle 

represents the 25th percentile, which means that 25 percent of the customers will experience 

LCC savings below the value represented by the bottom of the rectangle if the standard were set 

at the level in question. The upper edge of the elongated rectangle represents the 75th percentile. 

Finally, each of the rectangles includes two “tails,” or two vertical black lines, extending 

downward to represent the 5th percentile (lower end) and upward to represent the 95th percentile 

(upper end). 

The remainder of this appendix presents the tabular and graphical results for the 15 

equipment classes analyzed for the CRAC equipment rulemaking. 
6B-2 

6B.2 LIFE-CYCLE COST AND PAYBACK PERIOD RESULTS

6B.2.1 Life-Cycle Cost Results for Air Cooled <65 kBtu 

Table 6B.2.1 LCC Results for Air Cooled <65 kBtu

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 11,982 32,039 44,021 — — — — —

1 13,471 29,822 43,294 809 3 89 8 8.5

2 15,222 28,140 43,362 212 17 68 14 10.2

3 17,281 26,756 44,037 (587) 65 23 12 12.1

4 19,700 25,623 45,323 (1,761) 90 5 6 14.5 

Figure 6B.2.1 LCC Results for Air Cooled <65 kBtu 

-4000

-3000

-2000

-1000

0

1000

2000

3000

4000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-3 

Figure 6B.2.2 PBP Results for Air Cooled <65 kBtu 

0

5

10

15

20

25

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-4 

6B.2.2 Life-Cycle Cost Results for Air Cooled 65–240 kBtu 

Table 6B.2.2 LCC Results for Air Cooled 65–240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 39,412 121,532 160,945 — — — — –

1 41,651 110,885 152,536 9,334 0 98 2 2.6

2 44,063 102,936 146,999 6,406 0 78 22 3.0

3 46,664 96,523 143,187 5,895 0 33 67 3.5

4 49,467 91,289 140,756 6,437 1 2 97 4.0

Figure 6B.2.3 LCC Results for Air Cooled 65–240 kBtu 

0

5000

10000

15000

20000

25000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-5 

Figure 6B.2.4 PBP Results for Air Cooled 65–240 kBtu 

0

1

2

3

4

5

6

7

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-6 

6B.2.3 Life-Cycle Cost Results for Air Cooled > 240 kBtu 

Table 6B.2.3 LCC Results for Air Cooled > 240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 56,879 286,458 343,337 — — — — —

1 60,102 258,403 318,505 27,198 0 98 2 1.4

2 63,577 237,739 301,316 19,713 0 78 22 1.7

3 67,322 221,326 288,648 19,071 0 33 67 1.9

4 71,358 208,099 279,458 22,152 0 2 98 2.2

Figure 6B.2.5 LCC Results for Air Cooled > 240 kBtu 

0

10000

20000

30000

40000

50000

60000

70000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-7 

Figure 6B.2.6 PBP Results for Air Cooled > 240 kBtu 

0

1

1

2

2

3

3

4

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-8 

6B.2.4 Life-Cycle Cost Results for Water Cooled <65 kBtu 

Table 6B.2.4 LCC Results for Water Cooled <65 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 23,748 29,266 53,014 — — — — —

1 20,311 27,237 47,548 5,455 0 72 28 (21.5)

2 17,527 25,621 43,148 7,389 0 49 51 (20.9)

3 15,273 24,215 39,488 8,003 0 13 87 (20.3)

4 13,447 22,984 36,430 10,213 0 3 97 (19.7)

Figure 6B.2.7 LCC Results for Water Cooled <65 kBtu 

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-9 

Figure 6B.2.8 PBP Results for Water Cooled <65 kBtu 

-35

-30

-25

-20

-15

-10

-5

0

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-10

6B.2.5 Life-Cycle Cost Results for Water Cooled 65–240 kBtu 

Table 6B.2.5 LCC Results for Water Cooled 65–240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 22,983 109,615 132,598 — — — — —

1 28,614 104,631 133,245 (672) 20 72 8 15.4

2 36,183 101,867 138,049 (5,118) 54 42 4 22.4

3 46,355 100,831 147,186 (12,844) 79 20 1 35.9

4 60,027 101,734 161,761 (25,278) 96 4 0 64.6

Figure 6B.2.9 LCC Results for Water Cooled 65–240 kBtu 

-40000

-35000

-30000

-25000

-20000

-15000

-10000

-5000

0

5000

10000

15000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-11

Figure 6B.2.10 PBP Results for Water Cooled 65–240 kBtu 

0

50

100

150

200

250

300

350

400

450

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-12

6B.2.6 Life-Cycle Cost Results for Water Cooled > 240 kBtu 

Table 6B.2.6 LCC Results for Water Cooled > 240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 42,217 239,903 282,120 — — — — —

1 52,902 227,027 279,929 2,133 13 72 15 11.1

2 67,262 219,010 286,272 (5,292) 49 42 9 15.4

3 86,562 214,580 301,142 (18,696) 77 20 3 22.4

4 112,498 214,030 326,528 (40,964) 96 4 0 36.0

Figure 6B.2.11 LCC Results for Water Cooled > 240 kBtu 

-70000

-60000

-50000

-40000

-30000

-20000

-10000

0

10000

20000

30000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-13

Figure 6B.2.12 PBP Results for Water Cooled > 240 kBtu 

0

20

40

60

80

100

120

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-14

6B.2.7 Life-Cycle Cost Results for Water Cooled w/ FE <65 kBtu 

Table 6B.2.7 LCC Results for Water Cooled w/ FE <65 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 25,059 19,565 44,624 — — — — —

1 21,422 18,442 39,864 4,759 0 72 28 (40.3)

2 18,476 17,541 36,017 6,459 0 49 51 (39.3)

3 16,090 16,763 32,853 6,960 0 13 87 (38.3)

4 14,158 16,086 30,244 8,832 0 3 97 (37.3)

Figure 6B.2.13 LCC Results for Water Cooled w/ FE <65 kBtu 

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-15

Figure 6B.2.14 PBP Results for Water Cooled w/ FE <65 kBtu 

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-16

6B.2.8 Life-Cycle Cost Results for Water Cooled w/ FE 65–240 kBtu 

Table 6B.2.8 LCC Results for Water Cooled w/ FE 65–240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 24,169 73,475 97,645 — — — — —

1 30,129 71,967 102,095 (4,439) 25 72 3 41.5

2 38,138 71,937 110,075 (10,105) 58 42 0 34.1

3 48,903 73,290 122,193 (19,437) 80 20 0 (66.1)

4 63,372 76,298 139,669 (33,672) 96 4 0 (75.0)

Figure 6B.2.15 LCC Results for Water Cooled w/ FE 65–240 kBtu 

-50000

-40000

-30000

-20000

-10000

0

10000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-17

Figure 6B.2.16 PBP Results for Water Cooled w/ FE 65–240 kBtu 

-1500

-1000

-500

0

500

1000

1500

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-18

6B.2.9 Life-Cycle Cost Results for Water Cooled w/ FE > 240 kBtu 

Table 6B.2.9 LCC Results for Water Cooled w/ FE > 240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 44,469 157,416 201,886 — — — — —

1 55,777 152,704 208,481 (6,568) 25 72 3 30.5

2 70,973 151,095 222,068 (16,717) 57 42 1 40.7

3 91,397 152,234 243,631 (33,664) 80 20 0 43.1

4 118,844 156,568 275,412 (59,831) 96 4 0 (57.8)

Figure 6B.2.17 LCC Results for Water Cooled w/ FE > 240 kBtu 

-90000

-80000

-70000

-60000

-50000

-40000

-30000

-20000

-10000

0

10000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-19

Figure 6B.2.18 PBP Results for Water Cooled w/ FE > 240 kBtu 

-1400

-1200

-1000

-800

-600

-400

-200

0

200

400

600

800

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-20

6B.2.10 Life-Cycle Cost Results for Glycol Cooled <65 kBtu 

Table 6B.2.10 LCC Results for Glycol Cooled <65 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 24,353 29,757 54,110 — — — — —

1 20,916 27,643 48,559 5,540 0 72 28 (20.2)

2 18,132 25,962 44,094 7,501 0 49 51 (19.7)

3 15,878 24,509 40,387 8,117 0 13 87 (19.2)

4 14,052 23,241 37,293 10,350 0 3 97 (18.6)

Figure 6B.2.19 LCC Results for Glycol Cooled <65 kBtu 

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-21

Figure 6B.2.20 PBP Results for Glycol Cooled <65 kBtu 

-30

-25

-20

-15

-10

-5

0

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-22

6B.2.11 Life-Cycle Cost Results for Glycol Cooled 65–240 kBtu 

Table 6B.2.11 LCC Results for Glycol Cooled 65–240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 24,377 123,088 147,465 — — — — —

1 30,001 116,846 146,847 594 15 72 13 11.9

2 37,559 113,489 151,048 (3,901) 52 42 6 17.8

3 47,717 112,428 160,145 (11,921) 78 20 2 29.1

4 61,368 113,891 175,258 (25,047) 96 4 0 50.4

Figure 6B.2.21 LCC Results for Glycol Cooled 65–240 kBtu 

-40000

-30000

-20000

-10000

0

10000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-23

Figure 6B.2.22 PBP Results for Glycol Cooled 65–240 kBtu 

-300

-200

-100

0

100

200

300

400

500

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-24

6B.2.12 Life-Cycle Cost Results for Glycol Cooled > 240 kBtu 

Table 6B.2.12 LCC Results for Glycol Cooled > 240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 42,217 266,128 308,345 — — — — —

1 52,902 250,960 303,862 4,429 10 72 18 9.2

2 67,262 242,073 309,336 (3,308) 44 42 14 13.2

3 86,562 238,019 324,581 (17,633) 76 20 4 20.2

4 112,498 239,151 351,650 (41,761) 95 4 1 35.1

Figure 6B.2.23 LCC Results for Glycol Cooled > 240 kBtu 

-70000

-60000

-50000

-40000

-30000

-20000

-10000

0

10000

20000

30000

40000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-25

Figure 6B.2.24 PBP Results for Glycol Cooled > 240 kBtu 

-20

0

20

40

60

80

100

120

140

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-26

6B.2.13 Life-Cycle Cost Results for Glycol Cooled w/ FE <65 kBtu 

Table 6B.2.13 LCC Results for Glycol Cooled w/ FE <65 kBtu. 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 25,664 24,815 50,479 — — — — —

1 22,027 23,156 45,183 5,295 0 72 28 (28.2)

2 19,081 21,851 40,932 7,159 0 49 51 (27.6)

3 16,695 20,727 37,422 7,717 0 13 87 (26.9)

4 14,763 19,751 34,514 9,808 0 3 97 (26.3)

Figure 6B.2.25 LCC Results for Glycol Cooled w/ FE <65 kBtu 

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-27

Figure 6B.2.26 PBP Results for Glycol Cooled w/ FE <65 kBtu 

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-28

6B.2.14 Life-Cycle Cost Results for Glycol Cooled w/ FE 65–240 kBtu 

Table 6B.2.14 LCC Results for Glycol Cooled w/ FE 65–240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 25,563 102,580 128,143 — — — — —

1 31,514 98,451 129,965 (1,802) 23 72 5 21.0

2 39,512 96,813 136,325 (7,200) 55 42 3 33.4

3 50,261 97,235 147,496 (16,388) 79 20 1 40.8

4 64,708 99,990 164,697 (30,857) 96 4 0 22.4

Figure 6B.2.27 LCC Results for Glycol Cooled w/ FE 65–240 kBtu 

-50000

-40000

-30000

-20000

-10000

0

10000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-29

Figure 6B.2.28 PBP Results for Glycol Cooled w/ FE 65–240 kBtu 

-1000

-800

-600

-400

-200

0

200

400

600

800

1000

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National
6B-30

6B.2.15 Life-Cycle Cost Results for Glycol Cooled w/ FE > 240 kBtu 

Table 6B.2.15 LCC Results for Glycol Cooled w/ FE > 240 kBtu 

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

Percent of Households that 

Experience Median

Net Cost No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 44,469 220,328 264,797 — — — — —

1 55,777 209,958 265,735 (891) 21 72 7 15.4

2 70,973 204,967 275,941 (10,569) 53 42 5 23.3

3 91,397 204,265 295,662 (27,375) 77 20 3 32.3

4 118,844 208,311 327,156 (54,306) 95 4 1 34.8

Figure 6B.2.29 LCC Results for Glycol Cooled w/ FE > 240 kBtu 

-100000

-80000

-60000

-40000

-20000

0

20000

40000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`

National
6B-31

Figure 6B.2.30 PBP Results for Glycol Cooled w/ FE > 240 kBtu 

-600

-500

-400

-300

-200

-100

0

100

200

300

400

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level National