PAYBACK INFORMATION
Design Goals

Energy Efficiency

Environmental Sensitivity

Low Maintenance

Cost Effective Design / Construction

Logistics

Construction Time:

6.5

months

Move In:

Sep-96

Size (A/C):

2713

SF of A/C space

Size (gross):

3312

SF under roof

Electricity Savings (all electric home)

Average Electric Bill:

$67.88

 9 year average

Highest Electric Bill:

$103.52

 Aug 03 @ $.09/kWh rate

Electric Cost/Yr:

$802.12

 avg total annual cost (1996-2004)

Average Home Elec. Cost/Yr:

$2,116.72

 similar size house (source: TU electric)

Annual Savings:

$1,314.60

Monthly Savings:

$109.55

Payback

Cost for Energy Efficiency Items:

 $ 13,000

Added to a 15 year mortgage:

$98.93

/mo @ 5.5% int + tax deduct on mortgage

Added to a 30 year mortgage:

$73.94

/mo @ 6.0% int + tax deduct on mortgage

With a 15 year mortgage, you SAVE:

$10.62

/month - but get full Payback faster.

With a 30 year mortgage, you SAVE:

$35.61

/month

After the mortgage is paid, you realize the full savings every month.

Note that mortgage interest is tax deductible.

Energy bills are not deductible.  In fact, energy use is taxed.

Any increase in energy cost makes the payback even better.

Environmental Benefit of Energy Efficiency

Our electricity savings/year:

16,000

kWh

Annual reduction in CO2 emissions:

22,700

lbs/yr

Annual reduction in SO2 emissions:

100

lbs/yr

Annual reduction in NOx emissions:

100

lbs/yr

Miscellaneous Information

One compact fluorescent bulb saves:

$11.00

over its 5 year life

Our water use is only 3,000 gal/mo - the average Plano residence uses over 13,000 gal/mo.