For Heating Degree Day we have terms and definitions in 3 topics. The topics are Energy, Natural Gas and Weather.

A unit that measure the space heating needs during a given period of time.
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See DEGREE DAY, HEATING.
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One heating degree day is given for each degree that the daily mean temperature is below 65°F. It is used as an indication of fuel consumption.
Related terms: degree day or cooling degree day
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