U.S. Energy Efficiency

What 5 million data points say about energy efficiency potential

Energy efficiency is the country's cheapest power source and the secret to unlocking its potential isn't a new fracking fluid or a new nuclear reactor design. The key is data. A new era of data transparency and quantification is turning energy efficiency from a guesstimate into a reliable and deployable resource that our country can count on. This page is a small peek into that brave new world that brings together data on housing structures, heating and cooling, appliances, and energy habits from more than 120,000 U.S. households. The data illuminates clear opportunities for saving energy and money.

National Highlights

icon of light bulbs


North and South Dakotans report using more conventional light bulbs than any other state, at 1.5 times the national average. Vermonters, by contrast, report using efficient bulbs at the highest rate, 1.8 times the national average.

icon of freezer


States with the most stand-alone freezers in addition to a primary fridge and freezer? Alaska, Montana, North Dakota, South Dakota, and Wyoming, all in excess of 2x the national average.

icon of gas furnace

Heating Set Point

West Virginians like it warmer in the winter. They set their thermostats higher than most other states. Rhode Islanders keep their homes the coolest in winter.

icon of central air conditioner

Cooling Set Point

Alabamans set their thermostats cooler than any other state in the summer. Others who keep their AC chillier than average include residents of Arkansas, Indiana, Kentucky, Louisiana, Mississippi, New York, Tennessee, and West Virginia.

State by State

Potential savings per household
Medium High Very High


More likely than the U.S. average to have:
  • Homes without attic insulation (9x)
  • Efficient lighting (1.5x)
  • Homes without ducts (4.7x)
  • Tankless hot water heaters (7.6x)
  • In-wall air conditioning systems (3x)
  • Electric baseboard heat (2.8x)
  • Single-pane windows (2.5x)
Energy Efficiency Opportunities by Measure for Hawaii


  • 19% use conventional bulbs compared to 21% nationally
  • 52% use efficient vs. 35% of national average
  • 29% use a mix of conventional and efficient vs. 44% nationally

Water Heater

  • 84% have an electric hot water heater vs. 42% nationally
  • Of those, 76% have a standard system vs. 41% nationally


  • 22% have no AC vs. 11% nationally
  • 6% have wall AC vs. 2% nationally
  • 6% have window AC vs. 5% nationally


  • 53% report 4 or more occupants per house vs. 32% nationally


  • 67% of homes have slab foundations vs. 34% nationally

Age Range

  • 12% reported homes built since 2010 vs. 3% nationally


  • 16% of homes have reflective roofs vs. 2% nationally

DSM Solutions for Utility Programs

EnergySavvy's software brings breakthrough transparency and control to DSM departments. Utilities and states across the country use our Optix software platform to drive portfolio performance, increase customer satisfaction and minimize risk. We invite you to contact us and learn why industry leaders choose EnergySavvy.

Contact Us to Learn More