- The average home in the U.S. incurred $1,817 in energy expenses, which equates to nearly $202 billion annually.
- Despite the number of primary residences in the U.S. increasing from 77 million in 1978 to 111 million in 2005, total household energy consumption decreased slightly, from 10.58 to 10.55 quadrillion British Thermal Units (Btu).
- From 1978 to 2005, total energy use per household decreased by 31 percent, from 138 million Btu to 95 million Btu, largely due to more efficient heating, window design, and insulation.
- 70 percent of homes in California use some form of energy-efficient light bulbs (compact fluorescent or light-emitting diode lights), while only 47 percent do in Pennsylvania. On average, 60 percent of U.S. households use efficient lighting.
- In 2009, 39 percent of residences used an Energy Star rated refrigerator, and 36 percent used an Energy Star clothes washer.
