Btu per square foot per Heating Degree Day is the energy use index for a building.

Btu per square foot per Heating Degree Day is the energy use index for a building.

• A. True
• B. Not applicable
• C. Btu per square foot per Heating Degree Day is the energy use index for a building
• D. Only for commercial buildings

Answer: (C)

Energy Use Index (EUI) is a metric that lets you compare a building’s energy performance by accounting for both its size and the weather that drives heating needs. When you express energy use as Btu per square foot per Heating Degree Day, you’re normalizing the energy consumption to the building’s floor area and to how cold the season was. This unit specifically represents how much heating energy is used per square foot for each degree-day of heating demand, which is exactly what the EUI aims to capture. That’s why this statement is the best description of the energy use index for a building. The other options don’t fit because EUI is not limited to one building type, nor is it simply "not applicable."

Energy Use Index (EUI) is a metric that lets you compare a building’s energy performance by accounting for both its size and the weather that drives heating needs. When you express energy use as Btu per square foot per Heating Degree Day, you’re normalizing the energy consumption to the building’s floor area and to how cold the season was. This unit specifically represents how much heating energy is used per square foot for each degree-day of heating demand, which is exactly what the EUI aims to capture. That’s why this statement is the best description of the energy use index for a building. The other options don’t fit because EUI is not limited to one building type, nor is it simply "not applicable."