How is one degree day computed?

One degree day is computed by taking the average of the highest and lowest temperatures recorded for a day and then subtracting this average from a baseline temperature, which is typically set at 65°F. This method provides a simplified way to assess the heating or cooling demand for buildings, allowing for better energy management and planning.

The choice of 65°F is significant as it represents a standard threshold, often used in energy calculations, reflecting typical indoor comfort levels. By using the average of the highest and lowest temperatures, one can account for the fluctuations that occur throughout the day, leading to a more accurate estimation of temperature impact on energy consumption.

In contrast, other options that suggest different baseline temperatures or calculation methods do not align with the standard definitions used in the industry for degree days.