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COTA: Current technology could reduce energy consumption by a third, save $34B

I'm currently taking a course to become a Home Energy Rater. The HER System is a standardized way to measure the energy efficiency of homes. The introduction to the primer states the following:

Energy is a vital issue in terms of affordable housing. Heating and cooling a home is the largest cost of housing after the monthly rent or mortgage payment. Lower income Americans spend a disproportionate share of their incomes on energy. Not only do they have less disposable income to spend, their energy costs are all too often multiplied by their substandard housing which is cold, drafty and expensive to heat.
Making the nation’s housing stock more energy efficient has many potential benefits: safe, healthy, comfortable, and affordable housing for all Americans; reduction of the nation’s dependence on imported oil; and decreased production of carbon emissions aiding the environment. In the past few years, cost-effective, energy efficiency technologies have made dramatic progress. In a recent report, the Congressional Office of Technology Assessment estimated that the growing consumption of energy nationwide could be reduced by a third just by using commercially available, cost-effective technologies. The annual savings for consumers? More than $34 billion!

Out of curiousity, I tried looking up this citation from the Congressional Office of Technology Assessment. Are they referring to one third of all energy consumption, or just buildings, or just residential buildings?

It turns out the COTA was defunded in 1995. The Federation of American Scientists maintain an archive. I browsed through some of the reports, but couldn't find that $34 billion in savings conclusion. I hope the rest of my training materials use more current data!