America's Home Energy Experts

American Home Energy Alliance

What Is Energy Efficiency?

Energy efficiency is “using less energy to provide the same service”. ┬áThere are other definitions, but this is a good operational one. ┬áThe best way to understand this idea is through examples: When you replace a single pane window in your house with an energy-efficient one, the new window prevents heat from escaping in the winter, so you save energy by using…