Overall energy efficiency in the U.S. is 42 percent. It includes every sector of the economy, including transportation,
industry, agriculture, commercial and residential. The U.S. has the dubious honor of being the most wasteful country
in the world when it comes to energy efficiency.
The good news is that residential energy efficiency is among the highest of all sectors. Just 20 percent is wasted in
residential homes overall. Even so, with a population over 323 million in 2016, the amount of electricity used in
homes totaled 20,083 trillion Btus in 2017.
These are massive numbers and there is room for improvement. If each person in the U.S. decreased inefficiency by 10
percent, together we’d save 589,000,000,000 (589 billion) kilowatts or 597 billion pounds of coal and billions of
cubic feet of natural gas. Saving energy through improving home energy efficiency is the fastest and easiest way
for most of us to do our part to lower carbon emissions and slow climate change.