A method for quantifying the demand for energy needed to heat a building is achieved through a calculation based on the difference between a location’s daily average temperature and a baseline temperature, typically 65 degrees Fahrenheit (18 degrees Celsius). For each day, if the average temperature is below the baseline, the difference is accumulated; these accumulated differences are the heating degree days for that period. As an example, if on a given day the average temperature is 50F, the heating degree days for that day would be 15 (65F – 50F = 15F).
This metric provides a valuable tool for energy analysis and planning. It offers insights into historical weather patterns and their impact on energy consumption. Furthermore, it allows for comparisons of heating needs across different locations or time periods. This has significant applications in fields such as energy forecasting, building design, and utility resource management, enabling more efficient and sustainable practices.