A degree day is a unit of measure used to quantify the demand for energy needed to heat or cool a building. It primarily serves as an indicator of temperature variations from a baseline temperature, which is typically set at 65°F (18°C) in many contexts for heating and cooling calculations. **Types of Degree Days:** 1. **Heating Degree Days (HDD):** - These are calculated when the average daily temperature is below the baseline (65°F).
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