Glossary of Terms
1Btu, or British Thermal Unit, is a unit of energy measurement that can be used across fuel types. Approximate equivalent to energy required to heat 1 lb. of water 1 degree Fahrenheit. kBtu equals 1000 Btu; MMBtu equals one million Btu.
2CO2e or carbon dioxide equivalent, is a standard unit of measurement that can be used across different greenhouse gas types. It allows all greenhouse gas emissions to be expressed as an amount of carbon dioxide which has an equivalent global warming impact.
3Degree days are a simplified representation of outside air temperature, measuring how much (in degrees), and for how long (in days), outside air temperature was greater or less than a specified base temperature. The larger the number of degree days the more intense the weather (e.g. hotter in summer, colder in winter, and/or longer periods of heat and cold).
4EUI, or Energy Use Intensity, is a unit of measurement describing a building's energy use and efficiency. A building with a smaller EUI is using less energy for each square foot of space, and is generally considered to be more efficient than a comparable facility with a higher EUI.
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