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The top energy-saving home improvements

These are the top single-family-home, energy-efficiency improvements that reduce energy bills.

The return on investment (ROI) is based on 8 cents per kilowatt-hour.

Months refers to the number of months worth of savings it takes to pay for the modification.

Return on investment estimates for household energy efficiency improvements

Months

Modification

ROI

Kwh savings/unit

Cost per kwh

Annual savings

Cost per unit

3

High efficiency showerhead

400%

400

$0.08

$32

$8

13

Fireplace pillow-stops air leakage up chimney

91%

400

$0.08

$32

$35

14

Bathroom faucet aerator

84%

21

$0.08

$1.68

$2

17

Attic insulation
(R-0 to R-38)

69%

5.6

$0.08

$0.45

$0.65

23

Compact fluorescent bulb

53%

60

$0.08

$4.80

$9

23

Kitchen faucet aerator

51%

32

$0.08

$2.56

$5

25

Wrap 15' hot and cold water heater pipes

48%

60

$0.08

$4.80

$10

38

Replace incandescent porch light fixture with CFL bulb

32%

160

$0.08

$12.80

$40

43

Attic insulation (average)

28%

2

$0.08

$0.16

$0.57

44

Duct insulation and sealing

27%

12

$0.08

$0.96

$3.50

68

Wall insulation
(R-0 to R-25)

18%

2.2

$0.08

$0.18

$1

88

Floor insulation
(R-0 to R-13)

14%

1.7

$0.08

$0.14

$1

Source: Portland General Electric

 

-- Posted: April 7, 2003

 

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