"While the average household spends
about 5 percent of its income on energy bills,
the average low-income household
spends about 15 percent and
some households on fixed incomes
spend as much as 35 percent.
After home weatherization,
the average spending for energy drops to
10 percent among low-income households and
21 percent for fixed-income households.
These savings materially
increase the household standard of living
and can be put to other uses,
including setting the thermostat to a more comfortable temperature,
as well as for food, clothing, or education." “"
"Unlocking Energy Efficiency in the U.S. Economy," by McKinsey and Company