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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 annual, based on 7 cents per kilowatt-hour.

Example: A homeowner spends $500 to insulate an attic that has no insulation, and saves $25 per month on energy bills. $500 divided by $25 per month equals 20 months. This means the investment paid for itself in 20 months and, for the next 30 years, gives monthly dividends of $25 per month in lower energy bills. The $25 grows each time there is a rate increase.

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

 

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See Also
MAIN STORY: Save energy and slash your bills
AND: Most-common energy myths
WANTED: Energy-efficient homes! Rewards offered
Tips for living below your means

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