Field Test Evaluation of Conservation Retrofits of Low-Income, Single-Family Buildings in Wisconsin: Audit Field Test Implementation and Results Page: 58 of 84
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Table 5.3. Comparison of retrofit program costs and retrofit energy savings.
Average Annual energy
cost per Energy savings savings per hundred
housea per houseb,c program dollars
Major Retrofit ($) (therms/year) (therms/year/$100)
All retrofits 1603 202 + 47 12.6 + 2.9
Condensing furnace 2408 345 + 87 14.3 + 3.6
Wall insulation 1764 257 + 56 14.6 + 3.2
No major retrofits 660 12 + 38 1.8 + 5.8
aIncludes $300/house for audit and administrative costs.
bEnergy savings include expected pilot gas savings. They do not include adjust-
ment for control group.
cNumbers following + are standard errors.
A 12-year simple payback period should be acceptable for a program of this
type. Twelve years is short enough that the retrofits are likely to save money
at least equal to the cost of the program. Besides, there are other benefits to
the WAP that need to be considered in evaluating the cost effectiveness of the
1. Many low-income families receive assistance with their energy bills, either
from government programs or from utilities companies. Reducing their fuel
bills with this program will reduce the subsidy they require from other
2. The values of low-income families' homes are increased by the retrofits.
3. The audits uncover safety problems that can be corrected.
4. Energy saved in low-income households reduce the nation's dependence on
foreign energy sources and helps to hold down energy prices by keeping
5. The home owners may experience increased comfort.
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McCold, L.N. Field Test Evaluation of Conservation Retrofits of Low-Income, Single-Family Buildings in Wisconsin: Audit Field Test Implementation and Results, report, January 1, 1988; United States. (digital.library.unt.edu/ark:/67531/metadc740901/m1/58/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.