The climate where your property is located and the annual fluctuations in weather can affect how much energy you use.
- Climate refers to regional variations in average weather conditions. For example, Florida has a warmer climate than Maine.
- Weather refers to annual variations at a single location over time. For example, you might have a very hot summer where you would use more energy than usual, or a mild winter when you would use less energy than usual.
There are two key metrics that account for these effects:
- Weather Normalized Energy. Weather normalized energy is the energy your building would have used under average conditions. The weather in a given year may be much hotter or colder than your building’s normal climate; weather normalized energy accounts for this difference. Note that the adjustment for Weather Normalized metrics is for weather only, but not climate.
- ENERGY STAR Score. The ENERGY STAR score accounts for both climate and weather. To provide a score, an equation is used to predict the energy your building is expected to use given its climate, weather, and business activity. Buildings that use less energy than this prediction score better and vice versa. The equation used for your prediction is based on a national analysis that includes buildings in all locations with different climates. Because of this national representation, regression coefficients (Cooling Degree Days (CDD) and Heating Degree Days (HDD)) incorporate the differences among these climates. To predict energy for your building in any given year, we will incorporate your actual experienced weather data for that year. For example, your building is predicted to use more energy in a very hot year.