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 < 65,000 Btu/h ...................................6B-2

6B.2.2 Life-Cycle Cost Results for Air-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h .6B-4

6B.2.3 Life-Cycle Cost Results for Air-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h6B-6

6B.2.4 Life-Cycle Cost Results for Water-Cooled < 65,000 Btu/h...............................6B-8

6B.2.5 Life-Cycle Cost Results for Water-Cooled ≥ 65,000 Btu/h and < 240,000 

Btu/h.................................................................................................................6B-10

6B.2.6 Life-Cycle Cost Results for Water-Cooled ≥ 240,000 Btu/h and < 760,000 

Btu/h.................................................................................................................6B-12

6B.2.7 Life-Cycle Cost Results for Water-Cooled with Fluid Economizer < 65,000 

Btu/h.................................................................................................................6B-14

6B.2.8 Life-Cycle Cost Results for Water-Cooled with Fluid Economizer ≥ 65,000 

Btu/h and < 240,000 Btu/h...............................................................................6B-16

6B.2.9 Life-Cycle Cost Results for Water-Cooled with Fluid Economizer ≥ 240,000 

Btu/h and < 760,000 Btu/h...............................................................................6B-18

6B.2.10 Life-Cycle Cost Results for Glycol-Cooled < 65,000 Btu/h..........................6B-20

6B.2.11 Life-Cycle Cost Results for Glycol-Cooled ≥ 65,000 Btu/h and < 240,000 

Btu/h.................................................................................................................6B-22

6B.2.12 Life-Cycle Cost Results for Glycol-Cooled≥ 240,000 Btu/h and < 760,000 

Btu/h.................................................................................................................6B-24

6B.2.13 Life-Cycle Cost Results for Glycol-Cooled with Fluid Economizer < 65,000 

Btu/h.................................................................................................................6B-26

6B.2.14 Life-Cycle Cost Results for Glycol-Cooled with Fluid Economizer ≥ 65,000 

Btu/h and < 240,000 Btu/h...............................................................................6B-28

6B.2.15 Life-Cycle Cost Results for Glycol-Cooled with Fluid Economizer ≥ 240,000 

Btu/h and < 760,000 Btu/h...............................................................................6B-30

LIST OF TABLES

Table 6B.2.1 LCC Results for Air-Cooled < 65,000 Btu/h* .....................................................6B-2

Table 6B.2.2 LCC Results for Air-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h .....................6B-4

Table 6B.2.3 LCC Results for Air-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h ...................6B-6

Table 6B.2.4 LCC Results for Water-Cooled < 65,000 Btu/h*.................................................6B-8

Table 6B.2.5 LCC Results for Water-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h*.............6B-10

Table 6B.2.6 LCC Results for Water-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h*...........6B-12

Table 6B.2.7 LCC Results for Water-Cooled with Fluid Economizer < 65,000 Btu/h*.........6B-14

Table 6B.2.8 LCC Results for Water-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h*.................................................................................................6B-16

Table 6B.2.9 LCC Results for Water-Cooled with Fluid Economizer ≥ 240,000 Btu/h and < 

760,000 Btu/h*.................................................................................................6B-18

Table 6B.2.10 LCC Results for Glycol-Cooled < 65,000 Btu/h*............................................6B-20
6B-ii

Table 6B.2.11 LCC Results for Glycol-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h*..........6B-22

Table 6B.2.12 LCC Results for Glycol-Cooled≥ 240,000 Btu/h and < 760,000 Btu/h*.........6B-24

Table 6B.2.13 LCC Results for Glycol-Cooled with Fluid Economizer < 65,000 Btu/h*......6B-26

Table 6B.2.14 LCC Results for Glycol-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h*.................................................................................................6B-28

Table 6B.2.15 LCC Results for Glycol-Cooled with Fluid Economizer ≥ 240,000 Btu/h and < 

760,000 Btu/h*.................................................................................................6B-30

LIST OF FIGURES

Figure 6B.2.1 LCC Results for Air-Cooled < 65,000 Btu/h......................................................6B-2

Figure 6B.2.2 PBP Results for Air-Cooled < 65,000 Btu/h ......................................................6B-3

Figure 6B.2.3 LCC Results for Air-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h....................6B-4

Figure 6B.2.4 PBP Results for Air-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h.....................6B-5

Figure 6B.2.5 LCC Results for Air-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h..................6B-6

Figure 6B.2.6 PBP Results for Air-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h...................6B-7

Figure 6B.2.7 LCC Results for Water-Cooled < 65,000 Btu/h .................................................6B-8

Figure 6B.2.8 PBP Results for Water-Cooled < 65,000 Btu/h ..................................................6B-9

Figure 6B.2.9 LCC Results for Water-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h..............6B-10

Figure 6B.2.10 PBP Results for Water-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h ............6B-11

Figure 6B.2.11 LCC Results for Water-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h..........6B-12

Figure 6B.2.12 PBP Results for Water-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h ..........6B-13

Figure 6B.2.13 LCC Results for Water-Cooled with Fluid Economizer < 65,000 Btu/h .......6B-14

Figure 6B.2.14 PBP Results for Water-Cooled with Fluid Economizer < 65,000 Btu/h ........6B-15

Figure 6B.2.15 LCC Results for Water-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h...................................................................................................6B-16

Figure 6B.2.16 PBP Results for Water-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h...................................................................................................6B-17

Figure 6B.2.17 LCC Results for Water-Cooled with Fluid Economizer ≥ 240,000 Btu/h and < 

760,000 Btu/h...................................................................................................6B-18

Figure 6B.2.18 PBP Results for Water-Cooled with Fluid Economizer ≥ 240,000 Btu/h and < 

760,000 Btu/h...................................................................................................6B-19

Figure 6B.2.19 LCC Results for Glycol-Cooled < 65,000 Btu/h ............................................6B-20

Figure 6B.2.20 PBP Results for Glycol-Cooled < 65,000 Btu/h.............................................6B-21

Figure 6B.2.21 LCC Results for Glycol-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h ..........6B-22

Figure 6B.2.22 PBP Results for Glycol-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h ...........6B-23

Figure 6B.2.23 LCC Results for Glycol-Cooled≥ 240,000 Btu/h and < 760,000 Btu/h .........6B-24

Figure 6B.2.24 PBP Results for Glycol-Cooled≥ 240,000 Btu/h and < 760,000 Btu/h ..........6B-25

Figure 6B.2.25 LCC Results for Glycol-Cooled with Fluid Economizer < 65,000 Btu/h ......6B-26

Figure 6B.2.26 PBP Results for Glycol-Cooled with Fluid Economizer < 65,000 Btu/h .......6B-27

Figure 6B.2.27 LCC Results for Glycol-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h...................................................................................................6B-28

Figure 6B.2.28 PBP Results for Glycol-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h...................................................................................................6B-29

Figure 6B.2.29 LCC Results for Glycol-Cooled with Fluid Economizer ≥ 240,000 Btu/h and 

< 760,000 Btu/h ...............................................................................................6B-30
6B-iii

Figure 6B.2.30 PBP Results for Glycol-Cooled with Fluid Economizer ≥ 240,000 Btu/h and 

< 760,000 Btu/h ...............................................................................................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, LCC savings, and payback periods (PBPs) are presented for each of the 15 equipment

classes at each efficiency level. See chapter 6 of the technical support document 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 the results of each 

equipment classes. One plots LCC savings distributions while the other plots PBP results. The 

figures illustrate the mean and median values on the plot using red and blue markers, 

respectively. 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 or 

PBPs 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 < 65,000 Btu/h

Table 6B.2.1 LCC Results for Air-Cooled < 65,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 12,003 33,563 45,566

1 13,491 31,554 45,045 584 2 89 9 8.6

2 15,239 29,905 45,144 122 18 68 14 10.3

3 17,295 28,548 45,842 (648) 67 23 10 12.2

4 19,711 27,436 47,147 (1,828) 91 5 4 14.6

* Values in parentheses are negative values.

Figure 6B.2.1 LCC Results for Air-Cooled < 65,000 Btu/h

-4000

-3000

-2000

-1000

0

1000

2000

3000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-3

Figure 6B.2.2 PBP Results for Air-Cooled < 65,000 Btu/h

0

5

10

15

20

25

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-4

6B.2.2 Life-Cycle Cost Results for Air-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

Table 6B.2.2 LCC Results for Air-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 38,943 118,114 157,057

1 41,179 108,190 149,369 8,535 0 98 2 2.6

2 43,588 100,283 143,871 6,378 0 78 22 3.0

3 46,185 93,872 140,057 5,894 0 33 67 3.5

4 48,984 88,606 137,590 6,474 0 2 98 3.9

Figure 6B.2.3 LCC Results for Air-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-5

Figure 6B.2.4 PBP Results for Air-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

0

1

2

3

4

5

6

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-6

6B.2.3 Life-Cycle Cost Results for Air-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h

Table 6B.2.3 LCC Results for Air-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 56,633 288,343 344,977

1 59,852 262,649 322,501 24,709 0 98 2 1.4 

2 63,322 242,741 306,063 18,947 0 78 22 1.7 

3 67,061 227,026 294,087 18,146 0 33 67 2.0 

4 71,092 214,460 285,553 20,871 0 2 98 2.3 

Figure 6B.2.5 LCC Results for Air-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h

0

10000

20000

30000

40000

50000

60000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-7

Figure 6B.2.6 PBP Results for Air-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h

0

1

1

2

2

3

3

4

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-8

6B.2.4 Life-Cycle Cost Results for Water-Cooled < 65,000 Btu/h

Table 6B.2.4 LCC Results for Water-Cooled < 65,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 23,716 30,844 54,560

1 20,284 29,008 49,292 5,286 0 72 28 (21.7)

2 17,504 27,426 44,930 7,264 0 49 51 (21.1)

3 15,253 26,051 41,303 7,896 0 13 87 (20.5)

4 13,429 24,845 38,274 10,089 0 3 97 (19.9)

* Values in parentheses are negative values.

Figure 6B.2.7 LCC Results for Water-Cooled < 65,000 Btu/h

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-9

Figure 6B.2.8 PBP Results for Water-Cooled < 65,000 Btu/h

-30

-25

-20

-15

-10

-5

0

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-10

6B.2.5 Life-Cycle Cost Results for Water-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

Table 6B.2.5 LCC Results for Water-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 22,767 106,535 129,302

1 28,390 101,751 130,141 (774) 21 72 7 14.2

2 35,948 98,421 134,370 (4,582) 56 42 2 19.9

3 46,106 96,571 142,677 (11,622) 80 20 0 29.3

4 59,759 96,331 156,090 (23,097) 96 4 0 47.0

* Values in parentheses are negative values.

Figure 6B.2.9 LCC Results for Water-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

-35000

-30000

-25000

-20000

-15000

-10000

-5000

0

5000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-11

Figure 6B.2.10 PBP Results for Water-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

0

20

40

60

80

100

120

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-12

6B.2.6 Life-Cycle Cost Results for Water-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h

Table 6B.2.6 LCC Results for Water-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 42,240 240,877 283,117

1 52,910 230,552 283,462 (196) 17 72 11 12.6

2 67,250 224,068 291,318 (7,906) 54 42 4 18.6

3 86,522 221,566 308,088 (22,491) 79 20 1 29.7

4 112,423 223,494 335,917 (46,570) 96 4 0 54.6

* Values in parentheses are negative values.

Figure 6B.2.11 LCC Results for Water-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h

-70000

-60000

-50000

-40000

-30000

-20000

-10000

0

10000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-13

Figure 6B.2.12 PBP Results for Water-Cooled ≥ 240,000 Btu/h and < 760,000 Btu/h

0

50

100

150

200

250

300

350

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-14

6B.2.7 Life-Cycle Cost Results for Water-Cooled with Fluid Economizer < 65,000 Btu/h

Table 6B.2.7 LCC Results for Water-Cooled with Fluid Economizer < 65,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 25,025 21,485 46,510

1 21,393 20,449 41,842 4,686 0 72 28 (40.7)

2 18,451 19,563 38,015 6,400 0 49 51 (39.7)

3 16,069 18,798 34,867 6,908 0 13 87 (38.7)

4 14,139 18,132 32,272 8,772 0 3 97 (37.7)

* Values in parentheses are negative values.

Figure 6B.2.13 LCC Results for Water-Cooled with Fluid Economizer < 65,000 Btu/h

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-15

Figure 6B.2.14 PBP Results for Water-Cooled with Fluid Economizer < 65,000 Btu/h

-80

-70

-60

-50

-40

-30

-20

-10

0

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-16

6B.2.8 Life-Cycle Cost Results for Water-Cooled with Fluid Economizer ≥ 65,000 Btu/h 

and < 240,000 Btu/h

Table 6B.2.8 LCC Results for Water-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 23,952 71,670 95,622

1 29,903 69,964 99,867 (4,179) 28 72 0 36.8

2 37,901 69,297 107,198 (9,336) 58 42 0 48.1

3 48,651 69,771 118,421 (17,987) 80 20 0 35.8

4 63,099 71,578 134,677 (31,244) 96 4 0 (73.0)

* Values in parentheses are negative values.

Figure 6B.2.15 LCC Results for Water-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h

-50000

-45000

-40000

-35000

-30000

-25000

-20000

-15000

-10000

-5000

0

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-17

Figure 6B.2.16 PBP Results for Water-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h

-800

-600

-400

-200

0

200

400

600

800

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-18

6B.2.9 Life-Cycle Cost Results for Water-Cooled with Fluid Economizer ≥ 240,000 Btu/h 

and < 760,000 Btu/h

Table 6B.2.9 LCC Results for Water-Cooled with Fluid Economizer ≥ 240,000 Btu/h and < 

760,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 44,489 161,303 205,792

1 55,781 158,228 214,009 (8,064) 28 72 0 32.3

2 70,956 157,979 228,935 (18,795) 58 42 0 22.6

3 91,351 160,896 252,247 (36,931) 80 20 0 (43.7)

4 118,760 167,577 286,337 (64,864) 96 4 0 (57.2)

Values in parentheses are negative values

Figure 6B.2.17 LCC Results for Water-Cooled with Fluid Economizer ≥ 240,000 Btu/h and 

< 760,000 Btu/h

-100000

-90000

-80000

-70000

-60000

-50000

-40000

-30000

-20000

-10000

0

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-19

Figure 6B.2.18 PBP Results for Water-Cooled with Fluid Economizer ≥ 240,000 Btu/h and 

< 760,000 Btu/h

-2500

-2000

-1500

-1000

-500

0

500

1000

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-20

6B.2.10 Life-Cycle Cost Results for Glycol-Cooled < 65,000 Btu/h

Table 6B.2.10 LCC Results for Glycol-Cooled < 65,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 23,764 31,335 55,099

1 20,332 29,414 49,746 5,372 0 72 28 (20.5)

2 17,552 27,768 45,321 7,375 0 49 51 (20.0)

3 15,301 26,345 41,646 8,009 0 13 87 (19.5)

4 13,477 25,104 38,581 10,226 0 3 97 (19.0)

* Values in parentheses are negative values.

Figure 6B.2.19 LCC Results for Glycol-Cooled < 65,000 Btu/h

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-21

Figure 6B.2.20 PBP Results for Glycol-Cooled < 65,000 Btu/h

-30

-25

-20

-15

-10

-5

0

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-22

6B.2.11 Life-Cycle Cost Results for Glycol-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

Table 6B.2.11 LCC Results for Glycol-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 22,857 118,862 141,719

1 28,473 112,743 141,215 588 14 72 14 10.9

2 36,020 108,621 144,642 (3,117) 51 42 7 15.5

3 46,164 106,463 152,626 (10,236) 79 20 1 23.0

4 59,795 106,392 166,188 (22,091) 96 4 0 37.5

* Values in parentheses are negative values.

Figure 6B.2.21 LCC Results for Glycol-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

-35000

-30000

-25000

-20000

-15000

-10000

-5000

0

5000

10000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-23

Figure 6B.2.22 PBP Results for Glycol-Cooled ≥ 65,000 Btu/h and < 240,000 Btu/h

0

10

20

30

40

50

60

70

80

90

100

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-24

6B.2.12 Life-Cycle Cost Results for Glycol-Cooled≥ 240,000 Btu/h and < 760,000 Btu/h

Table 6B.2.12 LCC Results for Glycol-Cooled≥ 240,000 Btu/h and < 760,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 42,419 268,376 310,795

1 53,089 256,260 309,349 1,633 13 72 15 10.6

2 67,430 249,398 316,828 (6,637) 51 42 7 16.3

3 86,702 247,905 334,607 (22,582) 79 20 1 28.0

4 112,602 252,346 364,948 (49,159) 96 4 0 48.4

* Values in parentheses are negative values.

Figure 6B.2.23 LCC Results for Glycol-Cooled≥ 240,000 Btu/h and < 760,000 Btu/h

-80000

-70000

-60000

-50000

-40000

-30000

-20000

-10000

0

10000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-25

Figure 6B.2.24 PBP Results for Glycol-Cooled≥ 240,000 Btu/h and < 760,000 Btu/h

-300

-200

-100

0

100

200

300

400

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-26

6B.2.13 Life-Cycle Cost Results for Glycol-Cooled with Fluid Economizer < 65,000 Btu/h

Table 6B.2.13 LCC Results for Glycol-Cooled with Fluid Economizer < 65,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 25,073 26,615 51,689

1 21,441 25,108 46,550 5,162 0 72 28 (28.4)

2 18,500 23,823 42,323 7,064 0 49 51 (27.8)

3 16,117 22,716 38,833 7,640 0 13 87 (27.1)

4 14,187 21,755 35,942 9,722 0 3 97 (26.4)

* Values in parentheses are negative values.

Figure 6B.2.25 LCC Results for Glycol-Cooled with Fluid Economizer < 65,000 Btu/h

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-27

Figure 6B.2.26 PBP Results for Glycol-Cooled with Fluid Economizer < 65,000 Btu/h

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-28

6B.2.14 Life-Cycle Cost Results for Glycol-Cooled with Fluid Economizer ≥ 65,000 Btu/h 

and < 240,000 Btu/h

Table 6B.2.14 LCC Results for Glycol-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 24,041 99,288 123,328

1 29,984 95,100 125,083 (1,652) 23 72 5 18.0

2 37,971 92,626 130,597 (6,282) 55 42 3 27.3

3 48,705 91,890 140,595 (14,548) 79 20 1 45.3

4 63,131 93,060 156,191 (27,719) 96 4 0 49.5

* Values in parentheses are negative values.

Figure 6B.2.27 LCC Results for Glycol-Cooled with Fluid Economizer ≥ 65,000 Btu/h and 

< 240,000 Btu/h

-45000

-40000

-35000

-30000

-25000

-20000

-15000

-10000

-5000

0

5000

10000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-29

Figure 6B.2.28 PBP Results for Glycol-Cooled with Fluid Economizer ≥ 65,000 Btu/h and < 

240,000 Btu/h

-2000

-1500

-1000

-500

0

500

1000

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level
6B-30

6B.2.15 Life-Cycle Cost Results for Glycol-Cooled with Fluid Economizer ≥ 240,000 Btu/h 

and < 760,000 Btu/h

Table 6B.2.15 LCC Results for Glycol-Cooled with Fluid Economizer ≥ 240,000 Btu/h and 

< 760,000 Btu/h*

Efficiency 

Level

Life-Cycle Cost 

2011$ Life-Cycle Cost Savings

Payback 

Period 

years

Installed 

Cost

Discounted 

Operating 

Cost

LCC

Average 

Savings 

2011$

% of Consumers that 

Experience Median Net

Cost

No 

Impact

Net 

Benefit

Baseline 

(ASHRAE) 44,668 224,664 269,332

1 55,960 216,938 272,898 (3,338) 22 72 6 19.4

2 71,136 213,811 284,947 (13,598) 55 42 3 26.8

3 91,530 215,533 307,063 (31,974) 79 20 1 17.6

4 118,939 222,769 341,709 (61,294) 96 4 0 (45.0)

* Values in parentheses are negative values.

Figure 6B.2.29 LCC Results for Glycol-Cooled with Fluid Economizer ≥ 240,000 Btu/h and 

< 760,000 Btu/h

-100000

-80000

-60000

-40000

-20000

0

20000

1 2 3 4

Life-cycle Cost Savings($)

Efficiency Level

Mean Median

`
6B-31

Figure 6B.2.30 PBP Results for Glycol-Cooled with Fluid Economizer ≥ 240,000 Btu/h and 

< 760,000 Btu/h

-1400

-1200

-1000

-800

-600

-400

-200

0

200

400

600

1 2 3 4

Payback Period (years)

Mean Median Efficiency Level