DD has various meanings in the Governmental & Military category. Discover the full forms, definitions, and usage contexts of DD in Governmental & Military.
it’s a measuring day of heating and cooling. Heating Degree Days; Cooling Degree Days; Population-weighted Degree Days.Degrees API = (141.5 / sp.gr.60 deg.F/60 deg.F) - 131.5 or A unit, based upon temperature difference and time, used in estimating fuel consumption and specifying nominal heating load of a building in winter. For any one day, when the mean temperature is less than 65°F there exist as many degree days as there are Fahrenheit degrees difference in temperature between the mean temperature for the day and 65°F.
Governmental & MilitaryLast updated: