LAWRENCE BERKELEY LABORATORY

Bldg: 90 Room: 4000 510 486-6493

September 23, 1993

MEMORANDUM

TO: Barry Berlin, DOE

FROM: Isaac Turiel, LBL

RE:

Enclosed please find LCC analyses for central air conditioners/heat pumps, boilers,

and furnaces (only one product class). We expect to send you the two remaining classes

for furnaces next week. If you have any questions please call me at your convenience.

EE-RM-93-801 COMMENT 0BB

LAWRENCE BERKELEY LABORATORY 

Bldg: 90 Room: 4000 510486-6493 

September 23, 1993 

MEMORANDUM 

TO: Barry Berlin, DOE 

FROM: Isaac Turiel, LBL 

RE: 

Enclosed please find LCC analyses for central air conditioners/heat pumps, boilers, 

and furnaces (only one product class). We expect to send you the two remaining classes 

for furnaces next week. If you have any questions please call me at your convenience. 
9/17/93

Life Cycle Costs and Payback Periods of 34on, Split System Central Air Conditioner

Level Design Option

SEER Manufr

Cost

Incr.

Manufr

Cost

Installed

Installation Maintenance Consum

Cost Cost Cost

Annual

Elec.

use

Annual

Energy

cost

Cumul.

Payback

Period

Lifecycle Costs

(1992$)

Cumulative

Cost of Conserved Energy

(cents/kWh)

Btuh/W (1992$) (1992$) (1992$) 1992$ (1992$) kWh( 1992$) (years) 4% 6% 10% 4% 6% 10%

0 Baseline 10.00 $474.00 - $972.71 $46.69 $2185.44 3427 $290 NA $5,415 $5,007 $4,395 NA NA NA

1 0+ Backward Inclined Indoor Blower 10.28 $474.04 $0.04 $972.71 $46.69 $2185.54 3337 $283 0.01 $5,330 $4,933 $4,337 0.01 0.01 0.01

2 1 + Evaporator Slit Fins 10.40 $474.13 $0.09 $972.71 $46.69 $2185.76 3297 $279 0.03 $5,292 $4,900 $4,311 0.02 0.03 0.03

3 2 + Reciprocating Compressor: 10.91 EER 11.34 $481.51 $7.38 $972.71 $46.69 $2203.91 3025 $256 0.54 $5,054 $4,694 $4,154 0.41 0.47 0.60

4 3 + More Efficient Condenser PSC Fan Motor (65.0%) 11.47 $486.46 $4.95 $972.71 $39.08 $2208.48 2990 $253 0.62 $5,026 $4,670 $4,136 0.47 0.54 0.69

5 4 + More Efficient Evaporator PSC Fan Motor (68.5% 11.73 $493.68 $7.22 $972.71 $31.47 $2218.63 2922 $248 0.78 $4,972 $4,624 $4,103 0.59 0.68 0.86

6 5+ Time Delay Relay 12.18 $500.18 $6.50 $972.71 $31.47 $2234.62 2815 $239 0.95 $4,888 $4,552 $4,050 0.72 0. 83 1.06

7 6+ Condenser Grooved Tubes 12.62 $506.13 $5.95 $972.71 $31.47 $2249.26 2716 $230 1.06 $4,809 $4,485 $4,000 0.81 0.92 1.18

8 7 + Increase Evaporator Fin Density to 14 fpi 12.68 $506.88 $0.75 $972.71 $31.47 $2251.10 2704 $229 1.07 $4,800 $4,477 $3,995 0.82 0.94 1.19

9 8 + Scroll Compressor : 11.50 EER / Non-Bleed TXV 13.51 $543.29 $36.41 $972.71 $31.47 $2340.67 2538 $215 2.06 $4,732 $4,430 $3,977 1.57 1.80 2.29

10 9 + Increase Evaporator Face Area to 6.60 sq .ft. 14.40 $565.51 $22.22 $989.69 $31.47 $2412.31 2381 $202 2.56 $4,656 $4,373 $3,948 1.95 2.23 2.85

11 10 + Increase Condenser Face Area to 18.03 sq.ft. 15.19 $586.24 $20.73 $1024.25 $31.47 $2497.87 2257 $191 3.15 $4,625 $4,356 $3,953 2.40 2.75 3.51

12 11 + Increase Evaporator Face Area to 7.50 sq. ft. 15.37 $594.35 $8.11 $1030.42 $31.47 $2523.99 2230 $189 3.34 $4,626 $4,360 $3,962 2.54 2.91 3.72

13 12 + Increase Condenser Face Area to 28.33 sq. ft 15.82 $635.95 $41.60 $1099.53 $31.47 $2695.44 2167 $184 4.78 $4,738 $4,480 $4,093 3.64 4.17 5.32

14 13 + Evaporator ECM Fan Motor 16.40 $777.26 $141.31 $1099.53 $47.09 $3058.68 2091 $177 7.71 $5,029 $4,780 $4,407 5.88 6.73 8.59

15 14 + Electronic Expansion Valve 16.60 $853.43 $76.17 $1099.53 $56.07 $3255.04 2066 $175 9.27 $5,202 $4,955 $4,587 7.06 8.09 10.33

16 15 + Condenser ECM Fan Motor 16.75 $919.98 $66.55 $1099.53 $63.68 $3426.36 2047 $173 10.61 $5,355 $5,111 $4,746 8.09 9.26 11.82

17 16+Two-Speed Recip-Compressor System 18.20 $1,100.67 $180.69 $1099.53 $76.66 $3883.84 1884 $160 12.98 $5,659 $5,435 $5,098 9.90 11.33 14.47

18 16+ Variable-Speed Recip-Compressor System 18.58 $1,511.92 $591.94 $1099.53 $120.59 $4939.44 1846 $156 20.54 $6,679 $6,459 $6,129 15.66 17.93 22.89

19 16+Two-Speed Scroll-Compressor System 18.91 $1,411.92 $491.94 $1099.53 $116.22 $4689.07 1814 $154 18.30 $6,398 $6,182 $5,858 13.95 15.97 20.40

20 16+ Variable-Speed Scroll-Compressor System 21. 18 $1,561 .92 $641.94 $1099.53 $122.78 $5064.63 1619 $137 18.78 $6,590 $6,397 $6,108 14.32 16.39 20.93

Assumptions:

1 Electricity cost = 0.085 $/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated

to 1992 dollars). The interpolated value for 1999 is 0 .082 $/kWh (1991$) or 0.085 after adjusting for inflation from 1991 to 1992 . The electricity price enduse factor for CAC is 1.0 (no adjustment).

2 Lifetime = 15 years. Markup factor = 2.46.

3 Baseline unit includes:

Evaporator: 4.13 sq.fL, 13 fins/inch, Wavy Fins, 3 tube rows, Groove Tubes

Condenser: 12.88 sq. ft, 20 fins/inch, Slit Fins, 1 tube row, Smooth Tubes

Compressor: Reciprocating, 10.20 EER (nominal)

Evaporator Fan Motor: PSC, 58.5% efficient

Condenser Fan Motor: PSC, 55.0% efficient

Enhancement Devices: None

4 Non-Bleed Thermostatic Expansion Valve replaces the need for a Time Delay Relay

5 Maximum Sensible Heat Ratio = 76.5%

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls.

7 Condenser ECM Fan Motor is run at a single speed.

EE-RM-93-801 COMMENT 0BB

9/17/93 

Life Cycle Costs and Payback Periods of 3-t00, Split System Central Air Conditioner 

Incr. Installed Annual Annual Cumul. Lifecycle Costs Cumulative 

SEER Manufr Manufr Installation MaintenanceConsume; Elec. Energy Payback Cost of Conserved Energy 

Leve Design Option Cost Cost Cost Cost Cost use cost Period (1992$) (cents/kWb) 

BtuhIW (1992$) (1992$) (1992$) (1992$) 0992$) kWh/vr 0992$) (years) 4% 6% 10% 4% 6% 10% 

0 Baseline 10.00 $474.00 $972.71 $46.69 $2185.44 3427 $290 NA $5,415 $5,007 $4,395 NA NA NA 

1 0+ Backward Inclined Indoor Blower 10.28 $474.04 $0.04 $972.71 $46.69 $2185.54 3337 $283 0.01 $5,330 $4,933 $4,337 0.01 0.01 0.01 

2 1 + Evaporator Slit Fins 10.40 $474.13 $0.09 $972.71 $46.69 $2185.76 3297 $279 0.03 $5,292 $4,900 $4,311 .0.02 0.03 0.03 

3 2 + Reciprocating Compressor: 10.91 EER 11.34 $481.51 $7.38 $972.71 $46.69 $2203.91 3025 $256 0.54 $5,054 $4,694 $4,154 0.41 0.47 0.60 

4 3 + More Efficient Condenser PSC Fan Motor (65.0%) 11.47 $486.46 $4.95 $972.71 $39.08 $2208.48 2990 $253 0.62 $5,026 $4,670 $4,136 0.47 0.54 0.69 

5 4 + More Efficient Evaporator PSC Fan Motor (68.5% 11.73 $493.68 $7.22 $972.71 $31.47 $2218.63 2922 $248 0.78 $4,972 $4,624 $4,103 0.59 0.68 0.86 

6 5 + Time Delay Relay 12.18 $500.18 $6.50 $972.71 $31.47 $2234.62 2815 $239 0.95 $4,888 $4,552 $4,050 0.72 0.83 1.06 

7 6 + Condenser Grooved Tubes 12.62 $506.13 $5.95 $972.71 $31.47 $2249.26 2716 $230 1.06 $4,809 $4,485 $4,000 0.81 0.92 1.18 

8 7 + Increase Evaporator Fin Density to 14 fpi 12.68 $506.88 $0.75 $972.71 $31.47 $2251.10 2704 $229 1.07 $4,800 $4,477 $3,995 0.82 0.94 1.19 

9 8 + Scroll'Compressor: 11.50 EER I Non-Bleed TXV 13.51 $543.29 $36.41 $972.71 $31.47 $2340.67 2538 $215 2.06 $4,732 $4,430 $3,977 1.57 1.80 2.29 

10 9 + Increase Evaporator Face Area to 6.60 sq.ft. 14.40 $565.51 $22.22 $989.69 $31.47 $2412.31 2381 $202 2.56 $4,656 $4,373 $3,948 1.95 2.23 2.85 

11 10 + Increase Condenser Face Area to 18.03 sq.ft. 15.19 $586.24 $20.73 $1024.25 $31.47 $2497.87 2257 $191 3.15 $4,625 $4,356 $3,953 2.40 2.75 3.51 

12 11 + Increase Evaporator Face Area to 7.50 sq.ft. 15::37 $594.35 $8.11 $1030.42 $31.47 $2523.99 2230 $189 3.34 $4,626 $4,360 $3,962 2.54 2.91 3.72 

13 12 + Increase Condenser Face Area to 28.33 sq.ft. 15.82 $635.95 $41.60 $1099.53 $31.47 $2695.44 2167 $184 4.78 $4,738 $4,480 $4,093 3.64 4.17 5.32 

14 13 + Evaporator ECM Fan Motor 16.40 $777.26 $141.31 $1099.53 $47.09 $3058.68 2091 $177 nl $5,029 $4,780 $4,407 5.88 6.73 8.59 

15 14 + Electronic Expansion Valve 16.60 $853.43 $76.17 $1099.53 $56.07 $3255.04 2066 $175 9.27 $5,202 $4,955 $4,587 7.06 8.09 10.33 

16 15 + Condenser ECM Fan Motor 16.75 $919.98 $66.55 $1099.53 $63.68 $3426.36 2047 $173 10.61 $5,355 $5,111 $4,746 8.09 9.26 11.82 

17 16 + Two-Speed Recip-Compressor System 18.20 $1,100.67 $180.69 $1099.53 $76.66 $3883.84 1884 $160 12.98 $5,659 $5,435 $5,098 9.90 11.33 14.47 

18 16 + Variable-Speed Recip-Compressor System 18.58 $1,511.92 $591.94 $1099.53 $120.59 $4939.44 1846 $156 20.54 $6,679 $6,459 $6,129 15.66 17.93 22.89 

19 16 + Two-Speed Scroll-Compressor System 18.91 $1,411.92 $491.94 $1099.53 $116.22 $4689.07 1814 $154 18.30 $6,398 $6,182 $5,858 13.95 15.97 20.40 

20 16 + Variable-Speed Scroll-Compressor System 21.18 $1,561.92 $641.94 $1099.53 $122.78 $5064.63 1619 $137 18.78 $6,590 $6,397 $6,108 14.32 16.39 20.93 

Assumptions: 

1 Electricity cost = 0.085 $/kWb (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated 

to 1992 dollars). The interpolated value for 1999 is 0.082 $/kWb (1991$) or 0.085 after adjusting for inflation from 1991 to 1992. The electricity price enduse factor for CAC is 1.0 (no adjustment). 

2 Lifetime = IS years. Markup factor = 2.46. 

3 Baseline unit includes: 

Evaporator: 4.13 sq.ft, 13 fms/inch, Wavy Fins, 3 tube rows, Groove Tubes 

Condenser: 12.88 sq.ft., 20 lins/inch, Slit Fins, 1 tube row, Smooth Tubes 

Compressor: Reciprocating, 10.20 EER (nominal) 

Evaporator Fan Motor: PSC, 58.5% efficient 

Condenser Fan Motor: PSC, 55.0% efficient 

EnhancementDevices: None 

4 Non-Bleed Thermostatic Expansion Valve replaces the need for a Time Delay Relay 

5 Maximum Sensible Heat Ratio = 76.5% 

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls. 

7 Condenser ECM Fan Motor is run at a single speed. 
9/17/93

Life Cycle Cost for 3-ton Split System

Central Air Conditioner

$6,600

$6,200

$5,800

ds

$5,400

U

U}

$5,000

$4,600

6% discount rate

20

$4200 1 i i i i i i i i i i i i

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0

SEER

EE-RM-93-801 COMMENT 0BB

$6,600 

$6,200 

$5,800 

,-.. 

fF.T 

N 

0\ 

0\ 

o $5,400 

U 

U 

~ 

9/17/93 

Life Cycle Cost for 3-ton Split System 

Central Air Conditioner 

1-0-- 6% discount rate 1 

o 

18 

20 

$5,000 1 

3 

5 

$4,600 6 

13 

$4,200 

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 

SEER 
9/17/93

Life Cycle Cost for 3-ton Split System

Central Air Conditioner

U

U

a

$5,000

$4,600

$4,200

$3,800

A

nQ

' •o

4% discount rate

--^-- 6% discount rate

- - - - 10% discount rate

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0

SEER

EE-RM-93-801 COMMENT 0BB

$7,000 

$6,600 

$6,200 

$5,800 

V:r 

---

N 

0"1 

0"1 

~ $5,400 

U 

U 

~ 

$5,000 A 

.66,.. 

$4,600 

+ 

++, 

$4,200 

$3,800 

9.0 10.0 

9/17/93 

Life Cycle Cost for 3-ton Split System 

Central Air Conditioner 

--D-- 4% discount rate 

- - i:! - - 6% discount rate 

- - - - +- - - - 10% discount rate 

, ~ 1 

.~- ~ -.- -'* -----+ .A( -----.-----.... 

11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 

SEER 

/ 

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~ //' 

1/ " /' 

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19.0 20.0 21.0 22.0 
9/17/93

Life Cycle Costs and Payback Periods of S-ton, Split System Central Air Conditioner

Level Design Option

SEER Manufr

Cost

Incr.

Manufr

Cost

Installed

Installation Maintenance Consumer

Cost Cost Cost

Annual

Elec.

use

Annual

Energy

cost

Cumul.

Payback

Period

Lifecycle Costs

(1992$)

Cumulative

Cost of Conserved Energy

(cents/kWh)

Btuh/W (1992$) (1992$) (1992$) (1992$) (1992$) kWh/yr (1992$) (years) 4% 6% 10% 4% 6% 10%

0 Baseline 10.01 $666.00 - $1494.33 $46.69 $3412.48 5783 $490 NA $8,862 $8,173 $7,141 NA NA NA

1 0 + Backward Inclined Indoor Blower 10.29 $666.02 $0.02 $1494.33 $46.69 $3412.54 5625 $477 0.00 $8,714 $8,043 $7,039 0.00 0.00 0.00

2 1 + Evaporator Slit Fins 10.38 $666.23 $0.21 $1494.33 $46.69 $3413.13 5576 $473 0.04 $8,668 $8,003 $7,008 0.03 0.03 0.04

3 2 + Scroll Compressor: 11.30 EER 11.88 $690.87 $24.64 $1494.33 $46.69 $3482.36 4871 $413 0.90 $8,073 $7,492 $6,623 0.69 0.79 1.01

4 3 +Time Delay Relay 12.34 $697.37 $6.50 $1494.33 $46.69 $3500.63 4689 $397' 0.95 $7,919 $7,361 $6,523 0.72 0.83 1.06

5 4 + More Efficient Evaporator PSC Fan Motor (68.5%) 12.65 $707.14 $9.77 $1494.33 $39.08 $3520.47 4573 $388 1.05 $7,830 $7,285 $6,469 0.80 0.92 1.17

6 5 + Non-Bleed Thermostatic Expansion Valve 12.97 $714.72 $7.58 $1494.33 $39.08 $3541.77 4462 $378 1.15 $7,746 $7,215 $6,418 0.88 1.01 1.29

7 6 + More Efficient Condenser PSC Fan Motor (65.0%) 13.09 $721.02 $6.30 $1494.33 $31.47 $3551.87 4420 $375 1.21 $7,718 $7,191 $6,402 0.92 1.05 1.35

8 7 + Increase Evaporator Fin Density to 14 fpi 13.14 $722.48 $1.46 $1494.33 $31.47 $3555.97 4405 $373 1.23 $7,708 $7,182 $6,396 0.94 1.07 1.37

9 8 + Increase Evaporator Face Area to 7.50 sq.ft. 13.53 $739.70 $17.22 $1504.62 $31.47 $3614.65 4276 $362 1.58 $7,644 $7,134 $6,371 1.21 1.38 1.76

10 9 + Condenser Grooved Tubes 13.69 $756.52 $16.82 $1504.62 $31.47 $3661.91 4226 $358 1.89 $7,644 $7,141 $6,386 1.44 1.65 2.11

11 10 + Increase Condenser Face Area to 36.50 sq.ft. 14.22 $850.40 $93.88 $1595.21 $31.47 $4016.30 4069 $345 4.16 $7,851 $7,366 $6,640 3.17 3.63 4.63

12 11 + Evaporator ECM Fan Motor 14.84 $1,030.66 $180.26 $1595.21 $47.09 $4538.45 3899 $330 7.05 $8,213 $7,748 $7,052 5.38 6.15 7.86

13 12+ Electronic Expansion Valve 15.04 $1,106.83 $76.17 $1595.21 $56.07 $4761.47 3847 $326 8.22 $8,387 $7,928 $7,242 6.27 7.17 9.16

14 13 + Condenser ECM Fan Motor 15.11 $1,179.53 $72.70 $1595.21 $63.68 $4973.37 3830 $325 9.43 $8,583 $8,126 $7,442 7.19 8.23 10.51

15 14+Two-SpeedRecip-CompressorSystem 16.76 $1,368.28 $188.75 $1595.21 $80.54 $5520.62 3452 $293 10.67 $8,773 $8,362 $7,746 8.13 9.31 11.89

16 14+ Variable-Speed Recip-Compressor System 17.67 $1,779.53 $600.00 $1595.21 $132.24 $6727.93 3275 $278 15.60 $9,815 $9,424 $8,840 11.89 13.62 17.39

17 14 + Two-Speed Scroll-Compressor System 17.02 $1,679.53 $500.00 $1595.21 $127.87 $6442.56 3400 $288 15.00 $9,646 $9,241 $8,634 11.44 13.09 16.72

18 1 14 + Variable-edScrolI-Com -Comprestem 19.62 $1,829.53 $650.00 $1595.21 $134.43 $6870.62 2949 $250 14.40 $9,649 $9,298 $8,772 10.97 12.56 16.04

Assumptions:

1 Electricity cost = 0.085 $/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated

to 1992 dollars). The interpolated value for 1999 is 0. 082 $/kWh ( 1991$) or 0.085 after adjusting for inflation from 1991 to 1992. The electricity price enduse factor for CAC is 1.0 (no adjustment).

2 Lifetime = 15 years. Markup factor = 2.81.

3 Baseline unit includes:

Evaporator: 6.00 sq.ft., 13 fms/inch, Wavy Fins, 4 tube rows, Groove Tubes

Condenser: 23.00 sq.ft., 20 fins/inch, Slit Fins, 2 tube rows, Smooth Tubes

Compressor. Reciprocating, 10.49 EER (nominal); Accumulator

Evaporator Fan Motor: PSC, 58.5% efficient

Condenser Fan Motor: PSC, 55.0% efficient

Enhancement Devices: None

4 Non-Bleed Thermostatic Expansion Valve replaces the need for a Time Delay Relay.

5 Maximum Sensible Heat Ratio = 76.5%

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls.

7 Condenser ECM Fan Motor is run at a single speed.

EE-RM-93-801 COMMENT 0BB

9/17/93 

Lire Cycle Costs and Payback Periods or S-lon, Split System Central Air Conditioner 

Incr. Installed Annual Annual Cumul. Lifecycle Costs Cumulative 

SEER Manufr Manufr Installation Maintenance Consumer Elec. Energy Payback Cost of Conserved Energy 

Leve Design Option Cost Cost Cost Cost Cost use cost Period (1992$) (centsllc Wh) 

BtuhIW (1992$) (1992$) (1992$) (1992$) (1992$) kWhlyr (1992$) (years) 4% 6% 10% 4% 6% 10% 

0 Baseline 10.01 $666.00 - $1494.33 $46.69 $3412.48 5783 $490 NA $8,862 $8,173 $7,141 NA NA NA 

1 0+ Backward Inclined Indoor Blower 10.29 $666.02 $0.02 $1494.33 $46.69 $3412.54 5625 $477 0.00 $8,714 $8,D43 $7,039 0.00 0.00 0.00 

2 1 + Evaporator Slit Fins 10.38 $666.23 $0.21 $1494.33 $46.69 $3413.13 5576 $473 0.04 $8,668 $8,003 $7,008 0.03 0.03 0.04 

3 2 + Scroll Compressor: 1 1.30 EER 11.88 $690.87 $24.64 $1494.33 $46.69 $3482.36 4871 $413 0.90 $8,073 $7,492 $6,623 0.69 0.79 1.01 

4 3 + Time Delay Relay 12.34 $697.37 $6.50 $1494.33 $46.69 $3500.63 4689 $397 0.95 $7,919 $7,361 $6,523 0.72 0.83 1.06 

5 4 + More Efficient Evaporator PSC Fan Motor (68.5%) 12.65 $707.14 $9.77 $1494.33 $39.08 $352D.47 4573 $388 1.05 S7,830 S7,285 $6,469 0.80 0.92 1.17 

6 5 + Non-Bleed Thermostatic Expansion Valve 12.97 S714.72 S7.58 S1494.33 S39.08 $3541.77 4462 $378 1.15 S7,746 S7,215 $6,418 0.88 1.01 1.29 

7 6 + More Efficient Condenser PSC Fan Motor (65.0%) 13.09 S721.02 $6.30 $1494.33 $31.47 $3551.87 4420 $375 1.21 S7,718 $7,191 $6,402 0.92 1.05 1.35 

8 7 + Increase Evaporator Fin Density to 14 fpi 13.14 $722.48 $1.46 S1494.33 $31.47 $3555.97 4405 $373 1.23 S7,708 $7,182 $6,396 0.94 1.07 1.37 

9 8 + Increase Evaporator Face Area to 7.50 sq .ft. 13.53 $739.70 S17.22 $1504.62 $31.47 $3614.65 4276 $362 1.58 S7,644 $7,134 $6,371 1.21 1.38 . 1.76 

10 9 + Condenser Grooved Tubes 13.69 S756.52 $16.82 S1504.62 $31.47 $3661.91 4226 $358 1.89 $7,644 $7,141 S6,386 1.44 1.65 2.11 

11 10 + Increase Condenser Face Area to 36.50 sq.ft. 14.22 $850.40 $93.88 S1595.21 S31.47 $4016.30 4069 S345 4.16~ S7,851 S7,366 $6,640 3.17 3.63 4.63 

12 11 + Evaporator ECM Fan Motor 14.84 $1,030.66 $180.26 $1595.21 S47.09 $4538.45 3899 $330 7.05 $8,213 $7,748 $7,052 5.38 6.15 7.86 

13 12 + Electronic Expansion Valve 15.04 SI,106.83 S76.17 $1595.21 S56.07 $4761.47 3847 $326 8.22 S8,387 $7,928 $7,242 6.27 7.17 9.16 

14 13 + Condenser ECM Fan Motor 15.11 SI,179.53 $72.70 $1595.21 $63.68 $4973.37 3830 $325 9.43 $8,583 $8,126 $7,442 7.19 8.23 10.51 

15 14 + Two-Speed Recip-Compressor System 16.76 $1,368.28 $188.75 S1595.21 $80.54 $5520.62 3452 $293 10.67 S8,773 S8,362 S7,746 8.13 9.31 11.89 

16 14 + Variable-Speed Recip-Compressor System 17.67 SI,779.53 S600.00 S1595.21 $132.24 $6727.93 3275 S278 15.60 $9,815 S9,424 $8,840 11.89 13.62 17.39 

17 14 + Two-Speed Scroll-Compressor System 17.02 $1,679.53 $500.00 $1595.21 S127.87 S6442.56 3400 $288 15.00 $9,646 $9,241 $8,634 11.44 13.09 16.72 

18 14 + Variable-Speed Scroll-Compressor System 19.62 $1,829.53 $650.00 $1595.21 $134.43 $687D.62 2949 $250 14.40 $9,649 $9,298 $8,772 10.97 12.56 16.04 

Assumptions: 

1 Electricity cost = 0.085 $IIcWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated 

to 1992 dollars). The interpolated value for 1999 is 0.082 SIIcWh (1991S) or 0.085 after adjusting for inflation from 1991 to 1992. The electricity price enduse factor for CAC is 1.0 (no adjustment). 

2 Lifetime = 15 years. Markup factor = 2.81. 

3 Baseline unit includes: 

Evaporator: 6.00 sq.ft., 13 fms/inch, Wavy Fins, 4 tube rows, Groove Tubes 

Condenser: 23.00 sq.ft., 20 fins/inch, Slit Fins, 2 tube rows, Smooth Tubes 

Compressor: Reciprocating, 10.49 EER (nominal); Accumulator 

Evaporator Fan Motor: PSC, 58.5% efficient 

Condenser Fan Motor: PSC, 55.0% efficient 

Enhancement Devices: None 

4 Non-Bleed Thermostatic Expansion Valve replaces the need for a Time Delay Relay. 

5 Maximum Sensible Heat Ratio = 76.5% 

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls. 

7 Condenser ECM Fan Motor is run at a single speed. 
9/17/93

Life Cycle Cost for 5-ton Split System

Central Air Conditioner

$9,500

18

$9,000

$7,500

6% discount rate

$7,(}00 ,- i i r i {1-.i

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0

SEER

EE-RM-93-801 COMMENT 0BB

$9,500 

$9,000 

.- $8,500 

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~ $8,000 

$7,500 

$7,000 

9.0 

9/17/93 

Life Cycle Cost for 5·ton Split System 

Centra') Air Conditioner 

I----D-- 6% discount rate I 

o 

1 

2 

3 

4 

5 

10.0 11.0 12.0 13.0 14.0 15.0 16.0 

SEER 

16 

18 

17.0 18.0 19.0 20.0 
9/17/93

Life Cycle Cost for 5-ton Split System

Central Air Conditioner

U $7,800

$7,400

$7,000

$6,600

4% discount rate

- - - - 6% discount rate

10% discount rate

$6,200

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0

SEER

EE-RM-93-801 COMMENT 0BB

$9,800 

$9,400 

$9,000 

$8,600 

,.-., 

~ 

~ $8,200 

0\ 

~ 

'-' 

u 

u $7,800 ~ 

$7,400 

+ 

$7,000 

$6,600 

$6,200 

9.0 10.0 

9/17/93 

Life Cycle Cost for 5·ton Split System 

Central Air Conditioner 

-{]-- 4% discount rate 

- - fI - - 6% discount rate 

- - - - +- - - - 10% discount rate 

, 

,+ 

+-

-.. -.. -.~ - - + .• ' 

11.0 12.0 13.0 14.0 15.0 16.0 

SEER 

17.0 18.0 19.0 20.0 
Life Cycle Costs and Payback Periods of 3-ton, Split System Central Heat Pump

9/17/93

In Installed Annual Elec Use Annual Cumul. Lifecycle Costs Cumulative

SEER HSPF Manufr Manuf'r Installation Maintenance consumer Cooling Heating Energy Payback Coat of Conserve! Energy

Level Design Option Cost Cost cost Coat cost cost Period (1992$) (cents/kWh)

Btuh/W Btuh/W (1992$) (1992$) (1992$) (1992$) (1992$) kWh/yr kWh/yr (1992$) (years) 4% 6% 10% 4% 6% 10%

0 Baseline 10.00 6.89 $677.00 - $902.53 $46.69 $2743.27 3651 8,132 $999 NA $13,848 $12,444 $10,340 NA NA NA

1 0+ Backward Inclined Indoor Blower 10.30 7.00 $677.00 $0.00 $902.53 $46.69 $2743.27 3544 8,011 $979 0.00 $13,633 $12,256 $10,193 0.00 0.00 0.00

2 1+Indoor Coil Slit Fins 10.43 7.11 $677.03 $0.03 $902.53 $46.69 $2743.35 3500 7,889 $965 0.00 $13,476 $12,119 $10,085 0.00 0.01 0.01

3 2 + Increase Indoor Coil Fin Density to 14 fpi 10.47 7.13 $677.69 $0.66 $902.53 $46.69 $2745.10 3486 7,858 $962 0.05 $13,435 $12,083 $10,058 0.10 0.11 0.15

4 3 + More Efficient Indoor PSC Fan Motor (68.5%) 10.72 7.22 $684.89 $7.20 $902.53 $39.08 $2756.57 3406 7,760 $946 0.25 $13,279 $11,948 $9,955 0.49 0.56 0.71

5 4 + More Efficient Outdoor PSC Fan Motor (65.0% 10.83 7.32 $691.19 $6.30 $90253 $31.47 $2765.66 3372 7,658 $935 0.35 $13,160 $11,845 $9,876 0.72 0.82 1.05

6 5 + Time Delay Relay 11.17 7.47 $697.69 $6.50 $902.53 $31.47 $2782.88 3268 7,506 $913 0.46 $12,937 $11,652 $9,729 0.93 1.06 136

7 6+Reciprocating Compressor.11.26EER 11.69 7.68 $708.68 $10.99 $902.53 $31.47 $281200 3125 7,295 $883 0.59 $12,632 $11,390 $9,530 1.17 1.34 1.72

8 7 + Increase Indoor Coil Face Area to 4.97 sq.ft 12.41 7.97 $72205 $13.37 $912.27 $31.47 $2857.17 2941 7,037 $846 0.74 $12,261 $11,071 $9,290 1.44 1.65 2.11

9 8 + Demand Defrost 12.41 8.20 $733.55 $11.50 $91227 $31.47 $2887.65 2941 6,832 $828 0.85 $12,098 $10,933 $9,188 1.83 2.09 2.67

10 9+Outdoor Coil Grooved Tubes 12.73 8.24 $740.52 $6.97 $91227 $31.47 $2906.12 2869 6,803 $820 0.91 $12,021 $10,868 $9,142 1.87 2.14 2.74

11 10+ Increase Indoor Coil Face Area to 6.39 aq.ft. 13.12 8.40 $755.60 $15.08 $92201 $31.47 $2955.82 2782 6,674 $802 1.08 $11,868 $10,741 $9,052 2.20 2.52 3.22

12 11 + Scroll Compressor. 11.50 EER 13.70 8.50 $774.58 $18.98 $92201 $31.47 $3006.12 2665 6,591 $785 1.23 $11,729 $10,626 $8,974 2.40 2.74 3.50

13 12 + Non-Bleed Thermostatic Expansion Valves 14.04 8.73 $787.03 $12.45 $922.01 $31.47 $3039.11 2600 6,422 $765 1.26 $11,541 $10,466 $8,855 2.53 2.90 3.70

14 13 + Increase Outdoor Coil Face Area to 21.00 sq.8 14.78 9.06 $811.89 $24.86 $96227 $31.47 $3145.25 2471 6,184 $734 1.52 $11,302 $10,270 $8,725 3.06 3.51 4.48

15 14 + Increase Indoor Coil Face Area to 7.50 sq.ft 15.00 9.13 $822.19 $10.30 $969.88 $31.47 $3180.16 2434 6,139 $727 1.61 $11,259 $10,238 $8,707 3.23 3.70 4.72

16 15 + Increase Indoor Coil Tube Density to 4 rows 15.12 9.20 $844.58 $22.39 $969.88 $31.47 $3239.49 2416 6,092 $721 1.79 $11,257 $10,243 $8,724 3.61 4.13 5.28

17 16+ Increase Outdoor Coil Face Area to 30.00 sq.ft 15.48 9.32 $890.19 $45.61 $1030.27 $31.47 $3420.75 2359 6,018 $710 2.35 $11,314 $10,316 $8,821 4.71 5.40 6.89

18 17 + Outdoor ECM Fan Motor 15.59 9.45 $96289 $72.70 $1030.27 $39.08 $3621.01 2343 5,935 $702 2.95 $11,422 $10,435 $8,958 6.03 6.91 8.82

19 18 + Electronic Expansion Valve 15.79 9.50 $1,011.23 $48.34 $1030.27 $48.06 $3758.09 2313 5,904 $696 3.36 $11,502 $10,522 $9,055 6.82 7.81 9.97

20 19+ Indoor ECM Fan Motor 16.36 9.56 $1,152.53 $141.30 $1030.27 $63.68 $4148.16 2232 5,865 $686 4.50 $11,779 $10,814 $9,368 8.91 10.19 13.02

21 20+Two-Speed Recip-CompressorSystem 17.90 9.60 $1,332.79 $180.26 $1030.27 $77.62 $4639.79 2040 5,837 $668 5.73 $12,062 $11,124 $9,718 10.59 1212 15.47

22 20+Variable-Speed Recip-Compressor System 18.24 10.01 $1,744.04 $591.51 $1030.27 $123.47 $5775.45 2002 5,601 $644 8.56 $12,941 $12,034 $10,677 16.54 18.93 24.17

23 20+Two-Speed Scroll-Compressor System 18.48 10.19 $1,644.04 $491.51 $1030.27 $119.10 $5506.08 1976 5,500 $634 7.57 $12,552 $11,661 $10,326 14.84 16.99 21.69

24 20+Variable-Speed Scroll-Compressor System 20.83 11.01 $1,794.04 $641.51 $1030.27 $125.66 $5910.14 1753 5,089 $580 7.56 $12,358 $11,543 $10,321 15.00 17.18 21.93

Asatanotions:

1 Electricity cost - 0.085 S/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated

to 1992 dollars). The interpolated value for 1999 is 0.082 $/kWh (1991$) or 0.085 after adjusting for inflation from 1991 to 1992 The electricity price enduse factor for CAC is 1. 0 (no adjustment).

2 Lifetime = 15 years. Markup factor = 2.65.

3 Baseline unit includes:

Indoor Coil: 3.55 sq.ft, 13 fns/inch, Wavy Fins, 3 tube rows, Groove Tubes

Outdoor Coil: 15.00 sq.ft, 20 fins/inch, Slit Fins, I tube row, Smooth Tubes

Compressor. Reciprocating, 10.80 EER (nominal); Accumulator

Indoor Fan Motor: PSC, 58.5% efficient

Outdoor Fan Motor. PSC, 55.0% efficient

Enhancement Devices: None

4 All Two- Speed and Variable-Speed Compressor Systems include an Accumulator.

5 Maximum Sensible Heat Ratio = 76.5%

6 Non-Bleed Thermostatic Expansion Valves replace the need for & Time Delay Relay and an Accumulator.

7 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls.

8 Condenser ECM Fan Motor is run at a single speed.

EE-RM-93-801 COMMENT 0BB

Life Cycle Costs and Payback Periods of 3-ton, Split System Central Heat Pump 

Incr. Installed Annual Elec Use Annual Cumul. lifecycle Costs 

SEER HSPF Manufr Manuf'r Installation Maintenance consumer Cooling Heating Energy Payback 

Leve Design Option Coo Cost Coo Cost cost cost Period (1992$) 

Btuh/W Btuh/W (1992$) (1992$) (1992$) (1992$) (l9~2$) kWh/yr kWh/yr (1992$) (yearn) 4% 6% 

0 Baseline 10.00 6.89 $677.00 $902.53 $46.69 $2743.27 3651 8,132 $999 NA $13,848 $12,444 

1 0+ Backwanllnclined Indoor Blower 10.30 7.00 $677.00 $0.00 $902.53 $46.69 $2743.27 3544 8,011 $979 0.00 $13,633 $12,256 

2 1 + Indoor Coil Slit Fms 10.43 7.11 $677.03 $0.03 $902.53 $46.69 $2743.35 3500 7,889 $965 0.00 $13,476 $12,119 

3 2 + Increase Indoor Coil Fin Density to 14 fpi 10.47 7.13 $677.69 $0.66 $90253 $46.69 $2745.10 3486 7,858 $962 0.05 $13,435 $12,083 

4 3 + More Efficient Indoor PSC Fan Motor (68.5%) 10.72 7.22 $684.89 $7.20 $902.53 $39.08 $2756.57 3406 7,760 $946 0.25 $13,279 $11,948 

5 4 + More Efficient Outdoor PSC Fan Motor (65.0% 10.83 7.32 $691.19 $6.30 $90253 $31.47 $2765.66 3372 7,658 $935 0.35 $13,160 $11,845 

6 5 + Time Delay Relay 11.17 7.47 $697.69 $6.50 $902.53 $31.47 $2782.88 3268 7,506 $913 0.46 $12,937 $11,652 

7 6 + Reciprocating Compressor: 11.26 EER 11.69 7.68 $708.68 $10.99 $902.53 $31.47 $281200 3125 7,295 $883 0.59 $12,632 $11,390 

8 7 + Increase Indoor Coil Face Area to 4.97 sq.ft. 12.41 7.97 $72205 $13.37 $912.27 $31.47 $2857.17 2941 7,037 $846 0.74 $12,261 $11,071 

9 8 + Demand Defrost 12.41 8.20 $733.55 $11.50 $91227 $31.47 $2887.65 2941 6,832 $828 0.85 $12,098 $10,933 

10 9 + Outdoor Coil Grooved Tubes 12.73 8.24 $740.52 $6.97 $91227 $31.47 $2906.12 2869 6,803 $820 0.91 $12,021 $10,868 

11 10 + Increase Indoor Coil Face Area to 6.39 sq.fL 13.12 8.40 $755.60 $15.08 $92201 $31.47 $2955.82 2782 6,674 $802 1.08 $11,868 $10,741 

12 11 + Scroll Compressor: 11.50 EER 13.70 8.50 $774.58 $18.98 $922.01 $31.47 $3006.12 2665 6,591 $785 1.23 $11,729 $10,626 

13 12 + Non-Bleed Thermostatic Expansion Valves 14.04 8.73 $787.03 $12.45 $92201 $31.47 $3039.11 2600 6,422 $765 1.26 $11,541 $10,466 

14 13 + Increase Outdoor Coil Face Area to 21.00 sq.ft 14.78 9.06 $811.89 $24.86 $962.27 $31.47 $3145.25 2471 6,184 $734 1.52 $11,302 $10,270 

15 14 + Increase Indoor Coil Face Area to 7.50 sq.ft. 15.00 9.13 $822.19 $10.30 $969.88 $31.47 $3180.16 2434 6,139 $727 1.61 $11,259 $10,238 

16 15 + Increase Indoor Coil Tube Density to 4 rows 15.12 9.20 $844.58 $22.39 $969.88 $31.47 $3239.49 2416 6,092 $721 1.79 $11,257 $10,243 

17 16 + Increase Outdoor Coil Face Area to 30.00 sq.ft 15.48 9.32 $890.19 $45.61 $1030.27 $31.47 $3420.75 2359 6,018 $710 2.35 $11,314 $10,316 

18 17 + Outdoor ECM Fan Motor 15.59 9.45 $96289 $72.70 $1030.27 $39.08 $3621.01 2343 5,935 $702 2.95 $11,422 $10,435 

19 18 + Electronic Expansion V.lve 15.79 9.50 $1,011.23 $48.34 $1030.27 $48.06 $3758.09 2313 5,904 $696 3.36 $11,502 $10,522 

20 19 + Indoor ECM Fan Motor 16.36 9.56 $1,152.53 $141.30 $1030.27 $63.68 $4148.16 2232 5,865 $686 4.50 $11,779 $10,814 

21 20 + Two-Speed Recip-Compressor System 17.90 9.60 $1,332.79 $180.26 $1030.27 $77.62 $4639.79 2040 5,837 $668 5.73 $12,062 $11,124 

22 20 + Variable-Speed Recip-Compressor System 18.24 10.01 $1,744.04 $591.51 $1030.27 $123.47 $5775.45 2002 5,601 $644 8.56 $12,941 $12,034 

23 20 + Two-Speed Scroll-Compressor System 18.48 10.19 $1,644.04 $491.51 $1030.27 $119.10 $5506.08 1976 5,500 $634 7.57 $12,552 $11,661 

24 20 + Variable-Speed Scroll-Compressor System 20.83 11.01 $1,794.04 $641.51 $1030.27 $125.66 $5910.14 1753 5,089 $580 7.56 $12,358 $11,543 

AssumJ1ljoos: 

1 Electricity cost _ 0.085 $/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated 

to 1992 dolllIll). The interpolated value for1999 is 0.082 $/kWh (1991$) or 0.085 after adjusting for inflation from 1991 to 1992. The electricity price enduse factor for CAC is 1.0 (no adjustment). 

2 Lifetime = 15 yesrs. Markup factor = 2.65. 

3 Baseline unit includes: 

Indoor Coil: 3.55 sq.fL, 13 flIlSlinch, Wavy Fins, 3 tube rows, Groove Tubes 

Outdoor Coil: 15.00 sq.ft., 20 fins/inch, Slit Fins, 1 tube row, Smooth Tubes 

Compressor: Reciprocating, 10.80 EER (nominal); Accumulator 

Indoor Fan Motor: PSC, 58.5% efficient 

Outdoor Fan Motor: PSC, 55.0% efficient 

Enhancement Devices: None 

4 All Two-Speed and Variable-Speed Compressor Systems include an Accumulator. 

5 Maximum Sensible Heat Ratio = 76.5% 

6 Non-Bleed Thennostatic Expansion Valves replace the need for. Time Delay Relay and an Accumulator. 

7 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls. 

8 Condenser ECM Fan Motor is run at a single speed. 

10% 

$10,340 

$10,193 

$10,085 

$IO.os8 

$9,955 

$9,876 

$9,729 

$9,530 

$9,290 

$9,188 

$9,142 

$9,052 

$8,974 

$8,855 

$8,725 

$8,707 

$8,724 

$8,821 

$8,958 

$9,055 

$9,368 

$9,718 

$10,677 

$10,326 

$10,321 

9/17/93 

Cumulative 

Cost of Conserved Energy 

(ccnts,lk Wh) 

4% 6% 10% 

NA NA NA 

0.00 0.00 0.00 

0.00 0.01 0.01 

0.10 0.11 0.15 

0.49 0.56 0.71 

0.72 0.82 1.05 

0.93 1.06 1.36 

1.17 1.34 1.72 

1.44 1.65 2.11 

1.83 2.09 2.67 

1.87 2.14 2.74 

2.20 2.52 3.22 

2.40 2.74 3.50 

2.53 2.90 3.70 

3.06 3.51 4.48 

3.23 3.70 4.72 

3.61 4.13 5.28 

4.71 5.40 6.89 

6.03 6.91 8.82 

6.82 7.81 9.97 

8.91 10.19 13.02 

10.59 1212 15.47 

16.54 18.93 24.17 

14.&4 16.99 21.69 

15.00 17.18 21.93 
9/17/93

Life Cycle Cost for 3-ton Split System

Central Heat Pump

$12,500

$12,000

-.

$11,500 1

99-

$10,500

$10,000 {

6% discount rate

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0

SEER

EE-RM-93-801 COMMENT 0BB

$12,500 0 

$12,000 

6 

.- $11,500 7 Y'lN 

0'1 

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...J $11,000 

$10,500 

$10,000 

9.0 10.0 11.0 12.0 

9/17/93 

Life Cycle Cost for 3-ton Split System 

Central Heat Pump 

1------0--- 6% discount rate 1 

10 

11 20 

12 

13 

17 

15 

13.0 14.0 15.0 16.0 17.0 

SEER 

22 

23 24 

18.0 19.0 20.0 21.0 
9/17/93

Life Cycle Cost for 3-ton Split System

Central Heat Pump

$14,000

$13,500

$13,000

$12,500

$12,000

CNN $11,500 ON

v

A

4% discount rate

- - - - 6% discount rate

® 10% discount rate

U $11,000

11, $10,500

$10,000

'o.

$9,500

$9,000

0

o-®o -

$8 ,500 1

11

/

/

/

/

/

/

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0

SEER

EE-RM-93-801 COMMENT 0BB

10.0 11.0 12.0 

9/17/93 

Life Cycle Cost for 3·ton Split System 

Central Heat Pump 

----0---- 4% discount rate 

- - il - - 6% discount rate 

- -- -.- - - - 10% discount rate 

, 

, , 

13.0 14.0 15.0 16.0 17.0 

SEER 

18.0 19.0 20.0 21.0 
Life Cycle Costs and Payback Periods of 5-ton, Split System Central Heat Pump

9/20/93

Incr. Differential Differential Installed Annual Eloc Use Annual Cumul. Lifecycle Costs Cumulative

SEER HSPF Manufr Manufr Installation Maintenance Consumer Cooling Heating Energy Payback Cost of Conserved Energy

Level Design Option Cost Cost cost cost cost cost Period (1992$) (cetts/kWh)

Bruh/W Btuh/W (1992$) (1992$) (1992$) (1992$) (1992$) kWh/yr kWh/yr (1992$) (years) 4% 6% 10% 4% 6% 10%6

0 Baseline 10.00 7.09 $934.00 - $1161.54 $46.69 $3954.19 5798 13,556 $1,640 NA $22,193 $ 19,886 $16,431 NA NA NA

1 0 + Backward Inclined Indoor Blower 10.30 7.21 $934.03 $0.03 $1161.54 $46.69 $3954.28 5629 13,328 $1,607 0.00 $21,820 $19,560 $16,176 0.00 0.01 0.01

2 1+Indoor Coil Slit Fins 10.38 7.27 $934.25 $0.22 $1161.54 $46.69 $3954.93 5584 13,211 $1,593 0.02 $21,667 $19,427 $16,072 0.03 0.04 0.05

3 2+ Time Delay Relay 10.68 7.40 $940.75 $6.50 $1161.54 $46.69 $3974.04 5429 12,981 $1,560 0.25 $21,323 $19,129 $15,842 0.48 0.55 0.71

4 3 + Scroll Compressor. 11.30 EER 12.30 7.80 $965.13 $24.38 $1161.54 $46.69 $4045.71 4715 12,320 $1,444 0.47 $20,100 $18,069 $ 15,028 0.76 0.87 1.11

5 4 + More Efficient Outdoes PSC Fan Motor (65.0% 12.42 7.89 $971.43 $6.30 $1161.54 $39.08 $4056.62 4666 12,176 $1,428 0.48 $19,929 $17,922 $14,915 0.81 0.93 1.19

6 5 + Increase Indoor Coil Fin Density to 14 fpi 12.46 7.93 $973.16 $1.73 $1161.54 $39.08 $4061.71 4653 12,117 $1,421 0.49 $19,865 $17,866 $14,873 0.84 0.97 1.23

7 6 + More Efficient Indoor PSC Fan Motor (68.5%) 12. 81 8.04 $982.92 $9.76 $1161.54 $31.47 $4082.80 4525 11,946 $1,396 0.53 $19,605 $17,642 $14,702 0.91 1.04 1.33

8 7 + Demand Defrost 12.81 8.29 $994.42 $11.50 $116154 $31.47 $4116.61 4525 11,598 $1,367 0.59 $19,311 $17,389 $14,511 1.15 1.31 1.68

9 8+Non-Blood Thermostatic Expansion Valves 13.13 8.53 $1,016.08 $21.66 $1161.54 $31.47 $4180.29 4415 11,266 $1,329 0.73 $18,958 $17,089 $14,290 1.47 1.68 2.15

10 9 + Increase Indoor Coil Face Area to 7.50 sq.ft. 13.51 8.63 $1,033 .92 $17.84 $1171.83 $31.47 $4243.03 4292 11,137 $1,308 0.87 $18,783 $16,944 $14,190 1.73 1.97 2.52

11 10+ Outdoor Coil Grooved Tubes 13.71 8.66 $1,048.28 $14.36 $1171.83 $31.47 $4285.25 4229 11,102 $1,299 0.97 $18,733 $16,906 $14,169 1.90 2.17 2.78

12 11 + Increase Outdoor Coil Face Area to 36.50 sq.ft 14.36 8.98 $1,174.26 $125.98 $1285.90 $31.47 $4769.70 4037 10,704 $1,249 2.09 $18,662 $16,905 $14,273 4.17 4.77 6.09

13 12+ Electronic Expansion Valve 14.56 9.03 $1,222.60 $48.34 $1285.90 $40.45 $4920.80 3982 10,645 $1,240 2.41 $18,705 $16,961 $14,350 4.79 5.48 7.00

14 13 + Outdoor ECM Fan Motor 14.63 9.13 $1,295.30 $72.70 $1285.90 $48.06 $5142.15 3963 10,527 $1,228 2.88 $18,797 $17,070 $14,484 5.82 6.67 8.51

15 14+ Indoor ECM Fan Motor 15.35 9.22 $1,475.55 $180.25 $1285.90 $63.68 $5687.71 3778 10,419 $1,203 3.97 $19,066 $17,374 $14,840 7.72 8.84 11.28

16 15 + Two-Speed Recip-Compressor System 16.98 9 .23 $1,664. 30 $188 .75 $1285.90 $80.83 $6259 .78 3415 10,409 $1,172 4.92 $19,287 $17,639 $15,171 8.70 9.96 12.72

17 15 + Variable-Speed Recip- Compressor System 17.16 9.78 $2,075.55 $600.00 $1285.90 $133.11 $7521.14 3378 9,831 $1,120 6.85 $19,969 $18,394 $16,037 13.26 15.18 19.38

18 15+Two-Speed Scroll-Compressor System 17.30 10.02 $1,975.55 $500.00 $1285.90 $128.74 $7222.77 3352 9,586 $1,097 6.01 $19,415 $17,873 $15,564 12.02 13.76 1757

19 15+Variable-Speed Scroll-Compressor S stem 19.16 10.31 $2,125.55 $650.00 $1285.90 $135.29 $7670.32 3026 9,322 $1,047 6.26 $19,306 $17,835 $15,631 12.06 13.80 17.62

Assumptions:

1 Electricity cost = 0.085 $/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated

to 1992 dollars). The interpolated value for 1999 is 0.082 $/kWh (1991$) or 0.085 after adjusting for inflation from 1991 to 1992. The electricity price enduse factor for CAC is 1.0 (no adjustment).

2 Lifetime= 15 years. Markup factor = 2.94.

3 Baseline unit includes:

Indoor Coil: 6.00 sq.ft., 13 frnslmch, Wavy Fins, 4 tube rows, Groove Tubes

Outdoor Coil: 19.5 sq.ft., 20 fmsfrnch, Slit Fins, 2 tube rows, Smooth Tubes

Compressor. Reciprocating, 10.49 EER (nominal); Accumulator

Indoor Fan Motor: PSC, 58.5% efficient

Outdoor Fan Motor. PSC, 55.0% efficient

Enhancement Devices: None

4 Maximum Sensible Heat Ratio = 76.5%

5 Non-Bleed Thermostatic Expansion Valves replace the need for a Time Delay Relay; Accumulator still required due to excess refrigerant.

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls.

7 Condenser ECM Fan Motor is run at a single speed.

EE-RM-93-801 COMMENT 0BB

Life Cycle Costs and Payback Periods of 5-ton, Split System Central Heat Pump 

Incr. Differential Differential Installed Annual Eloc Usc Annual Cumul. Lifocycle COI!t8 

SEER HSPF Manufr Manufr Installatioo Maintenance Consumer Cooling Heating Energy Payback 

Level Design Option Cost COBt C06l C06l Cost COBt Period (1992$) 

BtuhIW Btuh/W (1992S) (1992$) (1992$) (1992$) (1992S) kWh/yr kWh/yr (1992$) (years) 4% 6% 

0 Baseline 10.00 7.09 $934.00 $1161.54 $46.69 $3954.19 5798 13,556 $1,640 NA $22,193 $19,886 

I 0+ Backward Inclined Indoor Blower 10.30 7.21 $934.03 $0.03 $1161.54 $46.69 $3954.28 5629 13,328 $1,607 0.00 $21,820 $19,560 

2 I + Indoor Coil Slit Fm. 10.38 7.27 $934.25 $0.22 $1161.54 $46.69 $3954.93 5584 13,211 $1,593 0.02 $21,667 $19,427 

3 2 + Tunc DeIlY Relay 10.68 7.40 $940.75 $6.50 $1161.54 $46.69 $3974.04 5429 12,981 $1,560 0.25 $21,323 $19,129 

4 3 + Scroll Compressor. II .30 EER 12.30 7.80 $965.13 S24.38 $1161.54 $46.69 $4045.71 4715 12,320 $1,444 0.47 $20,100 $18,069 

5 4 + More Efficient Outdoor PSC Fan Motor (65.0% 12.42 7.89 $971.43 $6.30 $1161.54 $39.08 $4056.62 4666 12,176 $1,428 0.48 $19,929 $17,922 

6 5 + Incte&sc Indoor Coil Fin Density to 14 fpi 12.46 7.93 $973.16 $1.73 $1161.54 $39.08 $4061.71 4653 12,117 $1,421 0.49 $19,865 $17,866 

7 6 + More Efficient Indoor PSC Fan Motor (68.5%) 12.81 8.04 S982.92 $9.76 $1161.54 $31.47 $4082.80 4525 11,946 $1,396 0.53 $19,605 $17,642 

8 7 + Demand Defrost 12.81 8.29 $994.42 SI1.50 $1161.54 $31.47 $4116.61 4525 II ,598 $1,367 0.59 S19,311 $17,389 

9 8 + Non-Bleed Thermostatic Expansion Valves 13.13 8.53 $1,016.08 $21.66 $1161.54 $31.47 $4180.29 4415 11,266 $1,329 0.73 $18,958 $17,089 

10 9 + Increasc Indoor Coil Face Area to 7.50 sq.ft. 13.51 8.63 $1,033.92 $17.84 $1171.83 $31.47 $4243.03 4292 11,137 $1,308 0.87 $18,783 $16,944 

II 10+ Outdoor Coil Grooved Tubes 13.71 8.66 $1,048.28 S14.36 $1171.83 $31.47 $4285.25 4229 11,102 $1,299 0.97 $18,733 $16,906 

12 II + Incrcue Outdoor Coil Face Area to 36.50 sq.ft 14.36 8.98 $1,174.26 $125.98 S1285.90 $31.47 $4769.70 4037 10,704 $1.249 2.09 S18,662 SI6,905 

13 12 + Electronic Expansioo Valve 14.56 9.03 $1,222.60 $48.34 $1285.90 $40.45 $4920.80 3982 10,645 $1,240 2.41 SI8,705 $16,961 

14 13 + Outdoor ECM Fan Motor 14.63 9.13 $1,295.30 $72.70 $1285.90 $48.06 $5142.15 3963 10,527 $1,228 2.88 $18,797 $17,070 

15 14 + Indoor ECM Fan Motor 15.35 9.22 $1,475.55 $180.25 $1285.90 $63.68 $5687.71 3778 10,419 SI,203 3.97 $19,066 $17,374 

16 15 + Two-Speed Recip-Compressor System 16.98 9.23 $1,664.30 $188.75 $1285.90 $80.83 $6259.78 3415 10,409 $1,172 4.92 $19,287 $17,639 

17 15 + Variable-Speed Recip-Compressor System 17.16 9.78 $2,075.55 S600.00 $1285.90 $133.11 $7521.14 3378 9,831 $1,120 6.85 $19,969 $18,394 

18 15 + Two-Speed Scroll-Compressor System 17.30 10.02 $1,975.55 S500.00 $1285.90 $128.74 $7222.77 3352 9,586 $1,097 6.01 $19,415 $17,873 

19 15 + Variable-Speed_Scroll-Coml'.tC8sorSystem 19.16 10.31 S2,125.55 S650.00 $1285.90 $135.29 $7670.32 3026 9,322 $1,047 6.26 $19,306 $17,835 

Assumptirns; 

1 Electricity cost - 0.085 $/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE', Annual Energy Outlook. 1993, inflated 

to 1992 dollartl). The interpolated value for 1999 is 0.082 $/kWh (1991 $) or 0.085 after adjusting for inflation from 1991 to 1992. The electricity price .nduse factor for CAC is 1.0 (no adjustment). 

2 Lifetime - 15 years. Mmup factor = 2.94. 

3 Baseline unit includes; 

Indoor Coil; 6.00 sq.ft., 13 f1nslinch, Wavy FlI1S, 4 tube rows, Groove Tubes 

Outdoor Coil; 19.5 sq.ft., 20 fmslinch, Slit Fms, 2 tube rows, Smooth Tubes 

Compressor: Reciprocating, 10.49 EER (nominal); Accumulator 

Indoor Fan Motor; PSC, 58.5% efficient . 

Outdoor Fan Motor: PSC, 55.0% efficient 

Enhancement Devices; None 

4 Maximum Sensible Heat Ratio = 76.5% 

5 Non-Bleed ThClmOstatiC Expansion Valves replace the need for. Time Delay Relay; Accumulator still requlred due to excess refrigeranL 

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls. 

7 Condenser ECM Fan Motor is run at a single speed. 

10% 

$16.431 

$16,176 

$16,072 

$15,842 

$15,Q28 

$14,915 

$14,873 

$14,702 

$14,511 

$14,290 

$14,190 

$14,169 

$14,273 

$14,350 

$14,484 

$14,840 

$15,171 

SI6,037 

S15,564 

$15,631 

9/20/93 

Cumulative 

C06l of Conserved Energy 

(cenlS/k Wh) 

4% 6% 10% 

NA NA NA 

0.00 0.01 0.01 

0.03 0.04 0.05 

0.48 0.55 0.71 

0.76 0.87 1.11 

0.81 0.93 1.19 

0.84 0.97 1.23 

0.91 1.04 1.33 

1.15 1.31 1.68 

1.47 1.68 2.15 

1.73 1.97 2.52 

1.90 2.17 2.78 

4.17 4.77 6.09 

4.79 5.48 7.00 

5.82 6.67 8.51 

7.72 8.84 11.28 

8.70 9.% 12.72 

13.26 15.18 19.38 

12.02 13.76 17.57 

12.06 13.80 17.62 
9/20/93

Life Cycle Cost for 5-ton Split System

Central Heat Pump

$20,000

$19,500

$19,000

$18,500

$18,000

6% discount rate

19

$17,500

$17,000

12

$16,500 -} ' ' ' I I ' '

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0

SEER

EE-RM-93-801 COMMENT 0BB

$20,000 

$19,500 

$19,000 

~ $18,500 

0'\ 

0'\ 

~ 

'-' 

u 

~ $18,000 

$17,500 

$17,000 

$16,500 

o 

3 

9.0 10.0 11.0 

9/20/93 

Life Cycle Cost for 5-ton Split System 

Central Heat Pump 

I-II-- 6% discount rate I 

17 

4 

l1li 18 

7 

8 

9 14 

111--

10 12 

12.0 13.0 14.0 15.0 16.0 17.0 

SEER 

18.0 19.0 20.0 
9/20/93

Life Cycle Cost for 5-ton Split System

Central Heat Pump

$22,500

$21,500

$20,500

$19,500

n

U $17,500

a

$16,500

$15,500

$14,500

IL 's&--Z^,

®®-

®`-®-®--- ®"

--A

$13,500 1 r ; i- T -- i i i i i I

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0

SEER

4% discount rate

- - - - 6% discount rate

® 10% discount rate

0

EE-RM-93-801 COMMENT 0BB

$22,500 

$21,500 

$20,500 

$19,500 

.-

Y3-

~ $18,500 

C"I 

...-1 

--U 

U $17,500 ~ 

$16,500 + 

$15,500 

$14,500 

$13,500 

9.0 10.0 11.0 

9/20/93 

Life Cycle Cost for 5·ton Split System 

Central Heat Pump 

-0-- 4% discount rate 

- - -6 - - 6% discount rate 

- - - -+- - - - 10% discount rate 

-+ , - -+ 

-+ 

~-

--- -: ; ; -, -, " '-'. ' .. ' -

,+ ~ = - - -+ 

+ .... - " -+" + ' -+-+ - - - -+ 

12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 

SEER 

20.0 
9/20/93

Life Cycle Costs and Payback Periods of 3-ton, Single Package System Central Air Conditioner

Level Design Option

SEER Manuf'r

Cost

Incr.

Manufr

Cost

Installed

Installation Maintenance Consume

Cost Cost Cost

Annual

Elec.

use

Annual

Energy

cost

Cumul.

Payback

Period

Lifecycle Costs

(1992$)

Cumulative

Cost of Conserved Energy

(cents/kWh)

Btuh/W (1992$) (1992$) (1992$) (1992$) (1992$) kWh/ (1992$) (years) 4% 6% 10% 4% 6% 10%

0 Baseline 9.70 $474.00 - $972.71 $46.69 $1957.92 3533 $299 NA $5,288 $4,867 $4,236 NA NA NA

1 0 + Backward Inclined Indoor Blower 9.97 $474.04 $0.04 $972.71 $46.69 $1958.00 3440 $292 0.01 $5,200 $4,790 $4,176 0.01 0.01 0.01

2 1 + Evaporator Slit Fins 10.09 $474.13 $0.09 $972.71 $46.69 $1958.18 3399 $288 0.02 $5,161 $4,756 $4,149 0.02 0.02 0.03

3 2+ Reciprocating Compressor: 10.91 EER 11.00 $481.51 $7.38 $972.71 $46.69 $1972.79 3118 $264 0.42 $4,911 $4,540 $3,983 0.32 0.37 0.47

4 3 + More Efficient Condenser PSC Fan Motor (65.0%) 11.12 $486.46 $4.95 $972.71 $39.08 $1974.98 3083 $261 0.45 $4,880 $4,513 $3,962 0.34 0.39 0.50

5 4 + More Efficient Evaporator PSC Fan Motor (68.5% 11.38 $493.68 $7.22 $972.71 $31.47 $1981.67 3013 $255 0.54 $4,821 $4,462 $3,924 0.41 0.47 0.60

6 5+ Time Delay Relay 11.81 $500.18 $6.50 $972.71 $31.47 $1994.54 2902 $246 0.68 $4,730 $4,384 $3,866 0.52 0.60 0.76

7 6 + Condenser Grooved Tubes 12.25 $506.13 $5.95 $972.71 $31.47 $2006.32 2800 $237 0.78 $4,645 $4,311 $3,812 0.59 0.68 0.87

8 7 + Increase Evaporator Fin Density to 14 fpi 12.30 $506.88 $0.75 $972.71 $31.47 $2007.80 2788 $236 0.79 $4,635 $4,303 $3,805 0.60 0.69 0.88

9 8 + Scroll Compressor: 11.50 EER / Non-Bleed TXV 13.11- $543.29 $36.41 $972.71 $31.47 $2079.89 2616 $222 1.57 $4,545 $4,234 $3,767 1.20 1.37 1.75

10 9+ Increase Evaporator Face Area to 6.60 sq.fL 13.97 $565.51 $22.22 $989.69 $31.47 $2140.87 2455 $208 2.00 $4,454 $4,162 $3,724 1.53 1.75 2.23

11 10 + Increase Condenser Face Area to 18.03 sq.fL 14.74 $586.24 $20.73 $1024.25 $31.47 $2216.48 2327 $197 2.53 $4,409 $4,132 $3,717 1.93 2.21 2.82

12 11 + Increase Evaporator Face Area to 7.50 sq.ft. 14.91 $594.35 $8.11 $1030.42 $31.47 $2238.70 2299 $195 2.68 $4,406 $4,132 $3,721 2.05 2.34 2.99

13 12 + Increase Condenser Face Area to 28.33 sq. ft. 15.35 $635.95 $41.60 $1099.53 $31.47 $2390.18 2234 $189 3.93 $4,496 $4,230 $3,831 2.99 3.43 4.38

14 13 + Evaporator ECM Fan Motor 15.91 $777.26 $141.31 $1099.53 $47.09 $2685.59 2155 $183 6.23 $4,717 $4,460 $4,075 4.75 5.44 6.94

15 14 + Electronic Expansion Valve 16.10 $853.43 $76.17 $1099.53 $56.07 '$2845.39 2129 $180 7.46 $4,852 $4,598 $4,218 5.69 6.51 8.31

16 15 + Condenser ECM Fan Motor 16.25 $919.98 $66.55 $1099.53 $63.68 $2984.77 2109 $179 8.51 $4,973 $4,721 $4,345 6.49 7.43 9.48

17 16 + Two-Speed Recip-Compressor System 17.66 $1,100.67 $180.69 $1099.53 $76.66 $3355.52 1942 $165 10.36 $5,185 $4,954 $4,607 7.90 9.04 11.54

18 16+ Variable-Speed Reci p- Compressor System 18.03 $1,511.92 $591.94 $1099.53 $120.59 $4213.72 1902 $161 16.31 $6,006 $5,779 $5,440 12.44 14.24 18.18

19 16+Two-Speed Scroll-Compressor System 18.35 $1,411.92 $491.94 $1099.53 $116.22 $4011.35 1869 $158 14.56 $5,773 $5,550 $5,216 11.10 12.70 16.22

20 16+ Variable-Speed Scroll-Com pressor System 20.55 $1,561.92 $641.94 $1099.53 $122.78 $4314.91 1668 $141 14.91 $5,887 $5,688 $5,390 11.37 13.01 16.62

Assumptions'

1 Electricity cost = 0.085 $/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOEs Annual Energy Outlook 1993, inflated

to 1992 dollars). The interpolated value for 1999 is 0.082 $/kWh (1991$) or 0.085 after adjusting for inflation from 1991 to 1992 . The electricity price enduse factor for CAC is 1 .0 (no adjustment).

2 Lifetime = 15 years. Markup factor = 1.98.

3 Baseline unit includes:

Evaporator: 4.13 sq.fL, 13 fins/inch, Wavy Fins, 3 tube rows, Groove Tubes

Condenser: 12.88 sq. ft, 20 finsfinch, Slit Fins, 1 tube row, Smooth Tubes

Compressor: Reciprocating, 10.20 EER (nominal)

Evaporator Fan Motor: PSC, 58.5% efficient

Condenser Fan Motor: PSC, 55.0% efficient

Enhancement Devices: None

4 Non-Bleed Thermostatic Expansion Valve replaces the need for a Time Delay Relay

5 Maximum Sensible Heat Ratio = 76.5%

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls.

7 Condenser ECM Fan Motor is run at a single speed.

EE-RM-93-801 COMMENT 0BB

9/20/93 

Life Cycle Costs and Payback Periods of 3-ton, Single Package System Central Air Conditioner 

Incr. Installed Annual Annual Cumul. Lifecycle Costs Cumulative 

SEER Manu[r Manu[r Installation MaintenanctConsumeJ Elec. Energy Payback Cost of Conserved Energy 

Leve Design Option Cost Cost Cost Cost Cost use cost Period (1992$) (cenlS/kWh) 

BtuhIW (1992$) (1992$) (1992$) (1992$) (1992$) kWh/yr (1992$) (years) 4% 6% 10% 4% 6% 10% 

0 Baseline 9.70 $474.00 $972.71 $46.69 $1957.92 3533 $299 NA $5,288 $4,867 $4,236 NA NA NA 

1 0+ Backward Inclined Indoor Blower 9.97 $474.04 $0.04 $972.71 $46.69 $1958.00 3440 $292 0.01 $5,200 $4,790 $4,176 0.01 0.01 0.01 

2 1 + Evaporator Slit Fins 10.09 $474.13 $0.09 $972.71 $46.69 $1958.18 3399 $288 0.02 $5,161 $4,756 $4,149 0.02 0.02 0.Q3 

3 2 + Reciprocating Compressor: 10.91 EER 11.00 $481.51 $7.38 $972.71 $46.69 $1972.79 3118 $264 0.42 $4,911 $4,540 $3,983 0.32 0.37 0.47 

4 3 + More Efficient Condenser PSC Fan Motor (65.0%) 11.12 $486.46 $4.95 $972.71 $39.08 $1974.98 3083 $261 0.45 $4,880 $4,513 $3,962 0.34 0.39 0.50 

5 4 + More Efficient Evaporator PSC Fan Motor (68.5% 11.38 $493.68 $7.22 $972.71 $31.47 $1981.67 3013 $255 0.54 $4,821 $4,462 $3,924 0.41 0.47 0.60 

6 5 + Time Delay Relay 11.81 $500.18 $6.50 $972.71 $31.47 $1994.54 2902 $246 0.68 $4,730 $4,384 $3,866 0.52 0.60 0.76 

7 6 + Condenser Grooved Tubes 12.25 $506.13 $5.95 $972.71 $31.47 $2006.32 2800 $237 0.78 $4,645 $4,311 $3,812 0.59 0.68 0.87 

8 7 + Increase Evaporator Fin Density to 14 fpi 12.30 $506.88 $0.75 $972.71 $31.47 $2007.80 2788 $236 0.79 $4,635 $4,303 $3,805 0.60 0.69 0.88 

9 8 + Scroll Compressor: 1 I .50 EER / Non-Bleed TXV 13.11' $543.29 $36.41 $972.71 $31.47 $2079.89 2616 $222 1.57 $4,545 $4,234 $3,767 1.20 1.37 1.75 

10 9 + Increase Evaporator Face Area to 6.60 sq.fi. 13.97 $565.51 $22.22 $989.69 $31.47 $2140.87 2455 $208 2.00 $4,454 $4,162 $3,724 1.53 1.75 2.23 

11 10+ Increase Condenser Face Area to 18.03 sq.ft 14.74 $586.24 $20.73 $1024.25 $31.47 $2216.48 2327 $197 2.53 $4,409 $4,132 $3,717 1.93 2.21 2.82 

12 11 + Increase Evaporator Face Area to 7.50 sq.ft 14.91 $594.35 $8.11 $103D.42 $31.47 $2238.70 2299 $195 2.68 $4,406 $4,132 $3,721 2.05 2.34 2.99 

13 12 + Increase Condenser Face Area to 28.33 sq.ft 15.35 $635.95 $41.60 $1099.53 $31.47 $2390.18 2234 $189 3.93 $4,496 $4,230 $3,831 2.99 3.43 4.38 

14 13 + Evaporator ECM Fan Motor 15.91 $777.26 $141.31 $1099.53 $47.09 $2685.59 2155 $183 6.23 $4,717 $4,460 $4,075 4.75 5.44 6.94 

15 14 + Electronic Expansion Valve 16.10 $853.43 $76.17 $1099.53 $56.07 $2845.39 2129 $180 7.46 $4,852 $4,598 $4,218 5.69 6.51 8.31 

16 15 + Condenser ECM Fan Motor 16.25 $919.98 $66.55 $1099.53 $63.68 $2984.77 2109 $179 8.51 $4,973 $4,721 $4,345 6.49 7.43 9.48 

17 16 + Two-Speed Recip·Compressor System 17.66 $1,100.67 $180.69 $1099.53 $76.66 $3355.52 1942 $165 10.36 $5,185 $4,954 $4,607 7.90 9.04 11.54 

18 16 + Variable-Speed Recip-Compressor System 18.03 $1,511.92 $591.94 $1099.53 $120.59 $4213.72 1902 $161 16.31 $6,006 $5,779 $5,440 12.44 14.24 18.18 

19 16 + Two-Speed Scroll·Comprc.%or System 18.35 $1,411.92 $491.94 $1099.53 $116.22 $4011.35 1869 $158 14.56 $5,773 $5,550 $5,216 11.10 12.70 16.22 

20 16+ Variable-Speed Scroll-Compressor SJ'Stcm 20.55 $1,561.92 $641.94 $1099.53 $122.78 $4314.91 1668 $141 14.91 $5,887 $5,688 $5,390 11.37 13.01 16.62 

ASSlUDpljQI\Ij; 

1 Electricity cost = 0.085 $/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated 

to 1992 dollars). The interpolated value for 1999 is 0.082 $/kWh (1991$) or 0.085 aner adjusting for inflation from 1991 to 1992. The electricity price enduse factor for CAC is 1.0 (no adjuslment). 

2 Lifetime = 15 years. Markup factor = 1.98. 

3 Baseline unit includes: 

Evaporator; 4.13 sq.fl, 13 flOS/inch, Wavy Fins, 3 tube rows, Groove Tubes 

Condenser: 12.88 sq.fl, 20 fms/inch, Slit Fins, 1 tube row, Smooth Tubes 

Compressor: Reciprocating, 10.20 EER (nominal) 

Evaporator Fan Motor: PSC, 58.5% efficient 

Condenser Fan Motor: PSC, 55.0% efficient 

Enhancement Devices: None 

4 Non-Bleed Thermostatic Expansion Valve replaces the need for a Time Delay Relay 

5 Maximwn Sensible Heat Ratio = 76.5% 

6 Evaporator ECM Fan MOlor is modulated. Cost of fan motor includes electronic modulating controls. 

7 Condenser ECM Fan Motor is run at a single speed. 
9/20/93

Life Cycle Cost for 3-ton Single Package System

Central Air Conditioner

$6,000

$5,600

$4,400

$4,000 -

6% discount rate

I

12

f - I {

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0

SEER

EE-RM-93-801 COMMENT 0BB

$6,000 

9/20/93 

Life Cycle Cost for 3-ton Single Package System 

Central Air Conditioner 

18 

$5,600 1---0- 6% discount rate 1 

__ $5,200 

fFt 

~ 

0'1 

0'1 

.-( 

'-' 

u 0 

U 1 

....:l $4,800 

16 

3 

5 

$4,400 6 

9 

10 11 13 

12 

$4,000 

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 

SEER 

20 

19.0 20.0 21.0 
9/20/93

Life Cycle Cost for 3-ton Single Package System

Central Air Conditioner

a

$6,000

$5,600

$5,200

$4,400

$4,000

A

I^A

4% discount rate

- - - - 6% discount rate

- - - - 10% discount rate

$3,600

9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0

SEER

EE-RM-93-801 COMMENT 0BB

,-.,. 

f:h 

N 

0'1 

0'1 

$6,000 

$5,600 

$5,200 

e $4,800 

u 

u 

~ 

$4,400 

$4,000 

$3,600 

9.0 10.0 11.0 

9/20/93 

Life Cycle Cost for 3·ton Single Package System 

Central Air Conditioner 

-0--- 4% discount rate 

- - il - - 6% discount rate 

- - - - +- - - - 10% discount rate 

, 

, + 

-~-

-----+---- , ---+.-----+.+ 

12.0 13.0 14.0 15.0 16.0 17.0 18.0 

SEER 

19.0 20.0 21.0 
9/20/93

Life Cycle Costs and Payback Periods of 5-ton, Single Package System Central Air Conditioner

Level Design Option

SEER Manufr

Cost

Incr.

Manufr

Cost

Installed

Installation Maintenance Consumer

Cost Cost Cost

Annual

Elec.

use

Annual

Energy

cost

Cumul.

Payback

Period

Lifecycle Costs

(1992$)

Cumulative

Cost of Conserved Energy

(cents/kWh)

Btuh/W (1992$) (1992$) (1992$) , (1992$) (1992$) kWb/yr (1992$) (years) 4% 6% 10% 4% 6% 10%

0 Baseline 9.71 $666.00 - $1494.33 $46.69 $3046.18 5962 $505 NA $8,664 $7,954 $6,890 NA NA NA

1 0 + Backward Inclined Indoor Blower 9.98 $666.02 $0.02 $1494.33 $46.69 $3046.23 5799 $492 0.00 $8,511 $7,820 $6,785 0.00 0.00 0.00

2 1 +Evaporator Slit Fins 10.07 $666.23 $0.21 $1494.33 $46.69 $3046.70 5748 $487 0.03 $8,464 $7,779 $6,753 0.02 0.03 0.03

3 2 + Scroll Compressor: 11.30 EER 11.52 $690.87 $24.64 $1494.33 $46.69 $3102.39 5022 $426 0.71 $7,835 $7,237 $6,340 0.54 0.62 0.79

4 3 + Time Delay Relay 11.97 $697.37 $6.50 $1494.33 $46.69 $3117.08 4834 $410 0.74 $7,672 $7,096 $6,233 0.57 0.65 0.83

5 4 + More Efficient Evaporator PSC Fan Motor (68.5%) 12.27 $707.14 $9.77 $1494.33 $39.08 $3131.55 4714 $400 0.81 $7,574 $7,013 $6,171 0.62 0.70 0.90

6 5+Non-Bleed Thermostatic Expansion Valve 12.58 $714.72 $7.58 $1494.33 $39.08 $3148.68 4599 $390 0.89 $7,483 $6,935 $6,114 0.68 0.77 0.99

7 6 + More Efficient Condenser PSC Fan Motor (65.0%) 12.70 $721.02 $6.30 $1494.33 $31.47 $3155.31 4557 $386 0.92 $7,450 $6,907 $6,093 0.70 0.80 1.02

8 7 + Increase Evaporator Fin Density to 14 fpi 12.74 $722.48 $1.46 $1494.33 $31.47 $3158.60 4542 $385 0.93 $7,439 $6,897 $6,087 0.71 0.82 1.04

9 8 + Increase Evaporator Face Area to 7.50 sq.ft. 13.13 $739.70 $17.22 $1504.62 $31.47 $3207.81 4408 $374 1.23 $7,362 $6,836 $6,050 0.94 1.07 1.37

10 9 + Condenser Grooved Tubes 13.28 $756.52 $16.82 $1504.62 $31.47 $3245.83 4356 $369 1.47 $7,351 $6,832 $6,054 1.12 1.28 1.64

11 10 + Increase Condenser Face Area to 36.50 sq.ft. 13.79 $850.40 $93.88 $1595.21 $31.47 $3548.58 4195 $356 3.36 $7,502 $7,002 $6,253 2.56 2.93 3.74

12 11 + Evaporator ECM Fan Motor 14.40 $1,030.66 $180.26 $1595.21 $47.09 $3971.59 4019 $341 5.62 $7,759 $7,280 $6,563 4.29 4.91 6.26

13 12 + Electronic Expansion Valve 14.59 $1,106.83 $76.17 $1595.21 $56.07 $4152.72 3966 $336 6.54 $7,890 $7,417 $6,709 4.99 5.71 7.29

14 13 + Condenser ECM Fan Motor 14.66 $1,179.53 $72.70 $1595.21 $63.68 $4324.63 3947 $335 7.49 $8,044 $7,574 $6,869 5.71 6.53 8.34

15 14+Two-SpeedRecip-CompressorSystem 16.27 $1,368.28 $188.75 $1595.21 $80.54 $4768.06 3557 $302 8.45 $8,120 $7,696 $7,061 6.44 7.37 9.42

16 14+ Variable-Speed Recip-Compressor System 17.14 $1,779.53 $600.00 $1595.21 $132.24 $5749.19 3376 $286 12.33 $8,930 $8,528 $7,925 9.40 10.76 13.74

17 14 + Two-Speed Scroll-Compressor System 16.52 $1,679.53 $500.00 $1595.21 $127.87 $5518.82 3504 $297 11.87 $8,821 $8,403 $7,778 9.05 10.36 13.23

18 1 14 Variable-Speed Scroll-Compressor System 19.04 $1,829.53 $650.00 $1595.21 $134.43 $5864.38 3039 $258 11.38 $8,728 $8,366 $7,824 8.67 9.93 12.68

Assumptions:

1 Electricity cost = 0.085 $/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated

to 1992 dollars). The interpolated value for 1999 is 0.082 $/kWh (1991$) or 0.085 after adjusting for inflation from 1991 to 1992. The electricity price enduse factor for CAC is 1.0 (no adjustment).

2 Lifetime = 15 years. Markup factor = 2.26.

3 Baseline unit includes:

Evaporator: 6.00 sq.ft., 13 fins/inch, Wavy Fins, 4 tube rows, Groove Tubes

Condenser: 23.00 sq.ft., 20 fins/inch, Slit Fins, 2 tube rows, Smooth Tubes

Compressor. Reciprocating , 10.49 EER (nominal); Accumulator

Evaporator Fan Motor: PSC, 58.5% efficient

Condenser Fan Motor: PSC, 55.0% efficient

Enhancement Devices: None

4 Non-Bleed Thermostatic Expansion Valve replaces the need for a Time Delay Relay.

5 Maximum Sensible Heat Ratio = 76.5%

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls.

7 Condenser ECM Fan Motor is run at a single speed.

EE-RM-93-801 COMMENT 0BB

9/20/93 

Life Cycle Costs and Payback Periods of Soton, Single Package System Central Air Conditioner 

Incr. Installed Annual Annual Cumul. Lifecycle Costs Cumulative 

SEER Manufr Manufr Installation Maintenance Consumer Elec. Energy Payback Cost of Conserved Energy 

Leve Design Option Cost Cost Cost Cost Cost use cost Period (1992$) (centstk Wh) 

Btuh/W (1992$) (1992$) (1992$) (1992$) (1992$) kWh/yr (1992$) (years) 4% 6% 10% 4% 6% 10% 

0 Baseline 9.71 $666.00 - $1494.33 $46.69 $3046.18 5962 $505. NA $8,664 $7,954 $6,890 NA NA NA 

I o + Backward Inclined Indoor Blower 9.98 $666.02 $0.02 $1494.33 $46.69 $3046.23 5799 $492 0.00 $8,511 $7,820 $6,785 0.00 0.00 0.00 

2 I + Evaporator Slit Fins 10.07 $666.23 $0.21 $1494.33 $46.69 $3046.70 5748 $487 0.03 $8,464 $7,779 $6,753 0.02 0.03 0.03 

3 2 + Scroll Compressor: 11.30 EER 11.52 $690.87 $24.64 $1494.33 $46.69 $3102.39 5022 $426 0.71 $7,835 $7,237 $6,340 0.54 0.62 0.79 

4 3 + Time Delay Relay 11.97 $697.37 $6.50 $1494.33 $46.69 $3117.08 4834 $410 0.74 $7,672 $7,096 $6,233 0.57 0.65 0.83 

5 4 + More Efficient Evaporator PSC Fan Motor (68.5%) 12.27 $707.14 $9.77 $1494.33 $39.08 $3131.55 4714 $400 0.81 $7,574 $7,013 $6,171 0.62 0.70 0.90 

6 5 + Non-Bleed Thermostatic Expansion Valve 12.58 $714.72 $7.58 $1494.33 $39.08 $3148.68 4599 $390 0.89 $7,483 $6,935 $6,114 0.68 0.77 0.99 

7 6 + More Efficient Condenser PSC Fan Motor (65.0%) 12.70 $721.02 $6.30 $1494.33 $31.47 $3155.31 4557 $386 0.92 $7,450 $6,907 $6,093 0.70 0.80 1.02 

8 7 + Increase Evaporator Fin Density to 14 fpi 12.74 $722.48 $1.46 $1494.33 $31.47 $3158.60 4542 $385 0.93 S7,439 S6,897 $6,087 0.71 0.82 1.04 

9 8 + Increase Evaporator Face Area to 7.50 sq.ft. 13.13 $739.70 $17.22 S1504.62 $31.47 $3207.81 4408 S374 1.23 S7,362 S6,836 S6,050 0.94 1.07 1.37 

10 9 + Condenser Grooved Tubes 13.28 $756.52 $16.82 $1504.62 $31.47 S3245.83 4356 $369 1.47 $7,351 $6,832 $6,054 1.12 1.28 1.64 

11 10 + Increase Condenser Face Area to 36.50 sq.ft. 13.79 $850.40 $93.88 $1595.21 $31.47 $3548.58 4195 $356 3.36 $7,502 $7,002 $6,253 2.56 2.93 3.74 

12 11 + Evaporator ECM Fan Motor 14.40 $1,030.66 $180.26 $1595.21 $47.09 $3971.59 4019 $341 5.62 $7,759 $7,280 $6,563 4.29 4.91 6.26 

13 12 + Electronic Expansion Valve 14.59 $1,106.83 $76.17 $1595.21 $56.07 $4152.72 3966 $336 6.54 $7,890 $7,417 $6,709 4.99 5.71 7.29 

14 13 + Condenser ECM Fan Motor 14.66 $1,179.53 $72.70 $1595.21 $63.68 S4324.63 3947 $335 7.49 $8,044 $7,574 $6,869 5.71 6.53 8.34 

15 14 + Two-Speed Recip-Compressor System 16.27 $1,368.28 $188.75 $1595.21 $80.54 S4768.06 3557 $302 8.45 $8,120 $7,696 $7,061 6.44 7.37 9.42 

16 14 + Variable-Speed Recip-Compressor System 17.14 $1,779.53 $600.00 $1595.21 $132.24 $5749.19 3376 $286 12.33 $8,930 $8,528 $7,925 9.40 10.76 13.74 

17 14 + Two-Speed Scroll-Compressor System 16.52 $1,679.53 $500.00 $1595.21 $127.87 $5518.82 3504 $297 11.87 $8,821 $8,403 $7,778 9.05 10.36 13.23 

18 14 + Variable-Speed Scroll-Compressor System 19.Q4 $1,829.53 $650.00 $1595.21 $134.43 $5864.38 3039 $258 11.38 $8,728 $8,366 $7,824 8.67 9.93 12.68 

Assumptions: 

1 Electricity cost = 0.085 $/kWh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated 

to 1992 dollars). The interpolated value for 1999 is 0.082 $/kWh (1991$) or 0.085 after adjusting for inflation from 1991 to 1992. The electricity price enduse factor for CAC is 1.0 (no adjustment). 

2 Lifetime = 15 years. Markup factor = 2.26. 

3 Baseline unit includes: 

Evaporator: 6.00 sq.ft., 13 fins/inch, Wavy Fins, 4 tube rows, Groove Tubes 

Condenser: 23.00 sq.ft., 20 fins/inch, Slit Fins, 2 tube rows, Smooth Tubes 

Compressor: Reciprocating, 10.49 EER (nominal); Accumulator 

Evaporator Fan Motor: PSC, 58.5% efficient 

Condenser Fan Motor: PSC, 55.0% efficient 

Enhancement Devices: None 

4 Non-Bleed Thermostatic Expansion Valve replaces the need for a Time Delay Relay. 

5 Maximum Sensible Heat Ratio =.76.5% 

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls. 

7 Condenser ECM Fan Motor is run at a single speed. 
9/20/93

Life Cycle Cost for 5-ton Single Package System

Central Air Conditioner

$8,700

$8,200

$7,200

$6,700

6% discount rate

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Central Air Conditioner 

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9/20/93

Life Cycle Cost for 5-ton Single Package System

Central Air Conditioner

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9/20/93 

Life Cycle Cost for 5·ton Single Package System 

Central Air Conditioner 

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Life Cycle Costs and Payback Periods of 5-ton, Single Package System Central Heat Pump

9/20/93

Incr. Differential Differential Installed Annual Eloc Use Annual Cumul. Iifocycle Costa Cumulative

SEER HSPF Manufr Manufr Installation Maintenance Consumer Cooling Heating Energy Payback Cost of Conserved Energy

Level Design Option Cost Cost Cost Cost cost cost Period (1992$) (cents/kWh)

Bu1W BtuhIW (1992$) (1992$) (1992$) (1992$) (1992$) kWh/yr kWh/yr (1992$) (years) 4% 6% 10% 4% 6% 1056

0 Baseline 9.70 6. 88 $934.00 - $1161.54 $46.69 $3412.47 5977 13,966 $1,690 NA $22,207 $19,830 $16,270 NA NA NA

1 0+ Backward Inclined Indoor Blower 9.99 7.00 $934.03 $0.03 $1161.54 $46.69 $3412.54 5803 13,732 $1,656 0.00 $21,823 $19,494 $16,007 0.00 0.00 0.01

2 1 + Indoor Coil Slit Fins 10.07 7.06 $934.25 $0.22 $1161.54 $46.69 $3413.06 5757 13,611 $1,642 0.01 $21,665 $19,357 $15,899 0.02 0.03 0.04

3 2 + T me Delay Relay 10.36 7.19 $940.75 $6.50 $1161.54 $46.69 $3428.40 5597 13,374 $1,608 0.19 $21,306 $19,045 $15,659 0.38 0.43 0.55

4 3 + Scroll Compressor. 11.30 EER 11.93 7.57 $965.13 $24.38 $1161.54 $46.69 $3485.94 4861 12,693 $1,488 0.36 $20,029 $17,937 $14, 803 0.59 0.68 0.87

5 4 + More Efficient Outdoor PSC Fan Motor (65.0% 12.05 7.66 $971.43 $6.30 $1161.54 $39.08 $3493.19 4811 12,545 $1,471 0.37 $19,850 $17,781 $14,683 0.62 0.71 0.91

6 5 + Increase Indoor Coil Fm Density to 14 fpi 12.09 7.70 $973.16 $1.73 $1161.54 $39.08 $3497.28 4797 12,484 $1,465 0.38 $19,782 $17,723 $14,638 0.65 0.74 0.94

7 6 + More Efficient Indoor PSC Fan Motor (68.5%) 12.43 7.81 $982.92 $9.76 $1161.54 $31.47 $3512.71 4665 12,308 $1,439 0.40 $19,508 $17,485 $14,455 0.69 0.79 1.00

8 7 + Demand Defrost 12.43 8.04 $994.42 $11.50 $1161.54 $31.47 $3539.85 4665 11,950 $1,408 0.45 $19,197 $17,217 $14,251 0.87 1.00 1.28

9 8 +Non-Bleed Thermostatic Expansion Valves 12.74 8.28 $1,016.08 $21.66 $1161.54 $31.47 $3590.97 4551 11,608 $1,370 0.56 $18,819 $ 16,893 $14,008 1.13 1.29 1.65

10 9 + Increase Indoor Coil Face Area to 7.50 aq.R. 13.10 8 .37 $1,033.92 $17.84 $1171.83 $31.47 $3643.36 4424 11,475 $1,348 0.67 $18,627 $16,732 $13,893 1.34 1.53 1.96

11 10+ Outdoor Coil Grooved Tubes 13.30 8 .40 $1,048.28 $14.36 $1171.83 $31.47 $3677.25 4360 11,438 $1,339 0.75 $18,565 $16,682 $ 13,862 1 .47 1.69 2.15

12 11 + Increase Outdoor Coil Face Area to 36.50 sq.ft 13.93 8 .71 $1,174.26 $125.98 $1285.90 $31.47 $4088.63 4162 11,028 $ 1,288 1.68 $18,404 $16,593 $ 13,882 335 3.84 4.90

13 12 + Electronic Expansion Valve 14.12 8.76 $1,222.60 $48.34 $1285.90 $40.45 $4211.69 4105 10,967 $1,278 1.94 $18,416 $16,619 $13,929 3.84 4.40 5.61

14 13+Outdoor ECM Fan Motor 14.20 8.86 $1,295.30 $72.70 $1285.90 $48.06 $4390.88 4084 10,844 $1,265 2.30 $18,459 $16,680 $14,015 4.65 5.32 6.79

15 14+ Indoor ECM Fan Motor 14.89 8.95 $1,475.55 $180.25 $1285.90 $63.68 $4831.89 3893 10,733 $1,240 3.15 $18,615 $16,872 $14,261 6.13 7.01 8.95

16 15 + Two-Speed Recip-Compressor System 16.48 8.96 $1,664.30 $188.75 $1285.90 $80.83 $5294.49 3519 10,722 $1,207 3.89 $18,715 $17,018 $14,476 6.89 7.88 10.07

17 15 + Variable-Speed Recip-Compressor System 16.65 9.49 $2,075.55 $600.00 $1285.90 $133.11 $6317.32 3481 10,127 $1,153 5.41 $19,141 $17,520 $15,090 10.47 11.98 15.30

18 15 + Two-Speed Scroll-Compressor System 16.78 9.73 $1,975.55 $500.00 $1285.90 $128.74 $6076.95 3454 9,875 $1,130 4.75 $18,639 $17,050 $14,670 9.50 10.88 13.89

19 15+Variable-Speed Scroll-Comp ressor Sstem 18.59 10.01 $2,125.55 $650.00 $1285.90 $135.29 $6437.50 3118 9,603 $1,078 4.94 $18,426 $16,910 $14,639 9.52 10.89 13.91

Assumptions:

1 Electricity cost - 0.085 $/k Wh (average cost in 1999 obtained from an interpolation of the 1995 and 2000 prices of electricity forecast in DOE's Annual Energy Outlook 1993, inflated

to 1992 dollars). The interpolated value for 1999 is 0.082 $/kWh (1991 S) or 0.085 after adjusting for inflation from 1991 to 1992. The electricity price enduse factor for CAC is 1.0 (no adjustment).

2 Lifetime . 15 years. Markup factor -236.

3 Baseline unit includes:

Indoor Coil: 6 .00 sq.ft., 13 fins/nch, Wavy Fins, 4 tube rows, Groove Tubes

Outdoor Coil: 19.5 aq.R., 20 fins/inch, Slit Fins, 2 tube rows, Smooth Tubes

Compressor. Reciprocating , 10.49 EER (nominal); Accumulator

Indoor Fan Motor: PSC, 58.5% efficient

Outdoor Fan Motor. PSC, 55.0% efficient

EnhancenentDevices: None

4 Maximum Sensible Heat Ratios 76.5%

5 Non-Bleed Thermostatic Expansion Valves replace the need for a Time Delay Relay; Accumulator still required due to excess refrigerant.

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electronic modulating controls.

7 Condenser ECM Fan Motor is run at a single speed.

EE-RM-93-801 COMMENT 0BB

Life Cycle Costs and Payback Periods or S·lon, Single Package System CentraJ Heat Pump 

Incr. Diffcrcntial DiffcmttiaJ. Installed Annual Elee Usc Annual Cumul. Ufeeyclc Costa 

SEER HSPI' Manufr Manufr Installatim Maintenance Conswner Cooling Heating Enexgy Payback 

Level Design Optim Cost Cost Cost Cost Cost cost Period (1992$) 

BtuhIW Btuh/W (1992$) (1992$) (1992$) (1992$) (1992$) kWh/yr kWh/yr (1992$) (years) 4% 6% 

0 Baseline 9.70 6.88 $934.00 - $1161.54 $46.69 $3412.47 5977 13,966 $1,690 NA $22,207 $19,830 

1 0+ Baclcward Inclincd Indoor Blower 9.99 7.00 $934.03 $0.03 $116154 $46.69 $341254 5803 13,732 $1,656 0.00 $21,823 $19,494 

2 1 + Indoor Coil Slit FinS 10.07 7.06 $934.25 $0.22 $1161.54 $46.69 $3413.06 5757 13,611 $1,642 0.01 $21,665 $19,357 

3 2 + rime Delay Relay 10.36 7.19 $940.75 $6.50 $1161.54 $46.69 $3428.40 5597 13,374 $1,608 0.19 $21,306 $19,045 

4 3 + Scroll Compressor: 11.30 EER 11.93 7.57 $965.13 $24.38 $1161.54 $46.69 $3485.94 4861 12,693 $1,488 0.36 $20,029 $17,937 

5 4 + Marc Efficient Outdoor PSC Fan Motor (65.0% 12.05 7.66 $971.43 $6.30 $1161.54 $39.08 $3493.19 4811 12,545 $1,471 0.37 $19,850 $17,781 

6 5 + Incrcasc Indoor Coil FIn Density to 14fpi 12.09 7.70 $973.16 $1.73 $1161.54 $39.08 $3497.28 4797 12,484 $1,465 0.38 $19,782 $17,723 

7 6 + Marc Efficient Indoor PSC Fan Motor (68.5%) 12.43 7.81 $982.92 $9.76 $1161.54 $31.47 $3512.71 4665 12,308 $1,439 0.40 $19,508 $17,485 

8 7 + Demand Defrost 12.43 8.04 $994.42 $11.50 $1161.54 $31.47 $3539.85 4665 11,950 $1,408 0.45 $19,197 $17,217 

9 8 + Non-Blecd Thermostatic Expansim Valves 12.74 8.28 $1,016.08 $21.66 $1161.54 $31.47 $3590.97 4551 11,608 $1,370 0.56 $18,819 $16,893 

10 9 + Incrcasc Indoor Coil Face Area to 7.50 sq.ft. 13.10 8.37 $1,033.92 $17.84 $1171.83 $31.47 $3643.36 4424 11,475 $1,348 0.67 $18,627 $16,732 

11 10 + Outdoor Coil Groovcd Tubes 13.30 8.40 $1,048.28 $14.36 $1171.83 $31.47 $3677.25 4360 11 ,438 $1,339 0.75 $18,565 $16,682 

12 11 + Increase Outdoor Coil Face Area to 36.50 sq.ft 13.93 8.71 $1,174.26 $125.98 $1285.90 $31.47 $4088.63 4162 11,028 $1,288 1.68 $18,404 $16,593 

13 12 + Electronic Expansim Valve 14.12 8.76 $1,222.60 $48.34 $1285.90 $40.45 $4211.69 4105 10,967 $1,278 1.94 $18,416 $16,619 

14 13 + Outdoor ECM Fan Motor 14.20 8.86 $1,295.30 $72.70 $1285.90 $48.06 $4390.88 4084 10,844 $1,265 2.30 $18,459 $16,680 

15 14 + Indoor ECM Fan Motor 14.89 8.95 $1,475.55 $180.25 $1285.90 $63.68 $4831.89 3893 10,733 $1,240 3.15 $18,615 $16,872 

16 15 + Two-Specd Recip-Compressor System 16.48 8.96 $1,664.30 $188.75 $1285.90 $80.83 $5294.49 3519 10,722 $1,207 3.89 $18,715 $17,018 

17 15 + Variable-Specd Recip-Compressor System 16.65 9.49 $2,075.55 $600.00 $1285.90 $133.11 $6317.32 3481 10,127 $1,153 5.41 $19,141 $17,520 

18 15 + Two-Specd Scroll-Compressor System 16.78 9.73 $1,975.55 $500.00 $1285.90 $128.74 $6076.95 3454 9,875 $1,130 4.75 $18,639 $17,050 

19 15 + Variable-Speed Scroll-Compressor System 18.59 10.01 $2,125.55 $650.00 $1285.90 $135.29 $6437.50 3118 9,603 $1,078 4.94 $18,426 $16,910 

Assumptions; 

1 Electricity cost ~ 0.085 $i1<Wb (average cost in 1999 obtaincd fran an interpolatioo of the 1995 and 2000 pricca of electricity forecast in DOE's Annual Energy Outlook 1993, inflated 

to 1992 dollars). The interpolatcd value for 1999 is 0.082 $/kWh (1991$) or 0.085 after adjusting for inflation fran 1991101992. The electricity price end use factor for CAC is 1.0 (no adjustment). 

2 Ufctirne - 15 years. Markup factor & 2.36. 

3 Baseline unit includes: 

Indoor Coil: 6.00 sq.ft., 13 fwlinch, Wavy Fins, 4 tube rows, Groove Tubea 

Outdoor Coil: 19.5 sq.ft., 20 flnslinch, Slit FinS, 2 tube rows, Smooth Tubea 

Compressor: Reciprocating, 10.49 EER (nominal); Accumulator 

Indoor Fan Motor: PSC, 58.5% efficient 

Outdoor Fan Motor: PSC, 55.0% efficient 

Enhancement Devices: None 

4 Maximum Sensible Heat Ratio - 76.5% 

5 Non-Bleed Thermostatic Expansion Valves replace the necd for a Time Delay Relay; Accumulator still required due to excess refrigerant; 

6 Evaporator ECM Fan Motor is modulated. Cost of fan motor includes electrooic modulating controls. 

7 Coodenser ECM Fan Motor is run at a single speed. 

10% 

$16,270 

$16,007 

$15,899 

$15,659 

$14,803 

$14,683 

$14,638 

$14,455 

$14,251 

$14,008 

$13,893 

$13,862 

$13,882 

$13,929 

$14,015 

$14,261 

$14,476 

$15,090 

$14,670 

$14,639 

9/20/93 

Cumulative 

Cost of ConsCIVed Enexgy 

(cen~Wb) 

4% 6% 10% 

NA NA NA 

0.00 0.00 0.01 

0.02 0.03 0.04 

0.38 0.43 0.55 

0.59 0.68 0.87 

0.62 0.71 0.91 

0.65 0.74 0.94 

0.69 0.79 1.00 

0.87 1.00 1.28 

1.13 1.29 1.65 

1.34 1.53 1.96 

1.47 1.69 2.15 

3.35 3.84 4.90 

3.84 4.40 5.61 

4.65 5.32 6.79 

6.13 7.01 8.95 

6.89 7.88 10.07 

10.47 11.98 15.30 

9.50 10.88 13.89 

9.52 10.89 13.91 
9/20/93

Life Cycle Cost for 5 -ton Single Package System

Central Heat Pump

$20,000

$19,600

$19,200

$18,800

U $18,000

a

$17,600

$17,200

$16,800

$16,400 1

9.0 10.0 11.0 12.0 13.0 14.0

SEER

6% discount rate

15.0 16.0 17.0 18.0 19.0

EE-RM-93-801 COMMENT 0BB

$20,000 0 

$19,600 

$19,200 3 

$18,800 

,-... 

~ $18,400 

0\ 

'-' """ 

u u $18,000 

...:l 

$17,600 

$17,200 

$16,800 

$16,400 

9.0 10.0 11.0 

9/20/93 

Life Cycle Cost for 5-ton Single Package System 

Central Heat Pump 

4 

7 

9 

12.0 13.0 

1-l1li- 6% discount rate 1 

14.0 

SEER 

15 

15.0 16.0 

17 

16 

---1118 

17.0 18.0 19.0 
9/20/93

Life Cycle Cost for 5-ton Single Package System

Central Heat Pump

$23,000

$22,000

$21,000

$20,000

$19,000

$18,000

U

$17,000

$16,000

$15,000

$14,000

$13,000

4% discount rate

i i I i

9.0 10.0 11.0 12.0 13.0

-----4

14.0 15.0 16.0 17.0 18.0 19.0

SEER

- - - 6% discount rate

®- - - - 10% discount rate

-A

EE-RM-93-801 COMMENT 0BB

$23,000 

$22,000 

$21,000 

$20,000 

__ $19,000 ~ 

~ 0'\ 

o $18,000 

u 

u 

~ $17,000 

$16,000 

$15,000 

$14,000 

$13,000 

9.0 10.0 11.0 

9/20/93 

Life Cycle Cost for 5·ton Single Package System 

Central Heat Pump 

12.0 

.. +-- --+ .. - - - -.+ + 

13.0 14.0 

SEER 

15.0 

-0---4% discount rate 

- - ts. - - 6% discount rate 

- - - - +- - - - 10% discount rate 

16.0 17.0 18.0 19.0