Tracking Energy Efficiency Performance in the United States

American Council for an Energy-Efficient Economy
http://aceee.org/ee-metrics

Today, we are unveiling a new web page that brings together many of key numbers to demonstrate our country’s overall energy efficiency. We chose metrics that measure trends from the perspective of major energy users. The metrics can also serve as a gateway to investigate the nuances of energy efficiency across the economy.

Since efficiency is a relative concept, we can only describe a product or system as being more or less efficient than itself or another. We say that an LED bulb is more energy efficient than an incandescent bulb because it consumes less electricity to produce the same amount of light. In your home, you might find mobile phones, electric toothbrushes, hair dryers, heating and air conditioning units, cooking stoves, washing machines, and various electronic appliances. Each of these have their own measure of efficiency, just like the LED bulb.

Similarly, to understand the energy efficiency of say, the residential sector in the United States as a whole, we can measure the average energy consumed per household or per unit floor area. From year to year, this value may fluctuate for many reasons, such as changes in weather, the size of homes, the number of appliances in homes. Thus, when looking at an entire sector, it is not easy to isolate improvements in energy efficiency from other reasons we might use more or less energy…

[Website] Welcome to ACEEE’s national indicators of energy efficiency in the United States. This web page shows energy efficiency trends by sector. More information on ACEEE’s work in each sector can be found in the related links. The page will be updated on a yearly basis as new data become available.

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