Site and source energy
Site energy refers to the total amount of energy consumed at a specific location, such as a building, facility, or campus. This includes the energy used to power the lights, heating and cooling systems, and all the equipment and appliances in the building/project.
Source energy, on the other hand, refers to the total amount of primary energy required to generate and deliver the site energy to the location. This includes the energy used to extract, produce, and deliver the fuel sources, such as coal, natural gas, or renewable sources like solar and wind energy. It also includes the energy used in the transmission and distribution of the energy to the site location.
Sources for source energy factors
Note that these values change over time due to changes in how energy is generated for the grid. Be sure to check and make sure you are using the latest sources for your source energy (no pun intended!).
- EnergyStar portfolio manager - source energy factors from 2020.
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