ClueLuma

Weather energy intensity calculator

Energy per degree day provides a simple weather index when weather is the dominant energy driver.

Units
I=EnergyDegree daysI = \frac{\text{Energy}}{\text{Degree days}}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Btu
as shown
Btu/degree-day

Worked example

Given

  • Energy\text{Energy} = 96,000,000 Btu
  • Degree days\text{Degree days} = 3,200 as shown
I=96,000,0003200=30,000I = \frac{96{,}000{,}000}{3200} = 30{,}000

Symbols and units

SymbolMeaningUnit
IInormalized energy indexBtu/degree-day
Energy\text{Energy}energy in the periodBtu
Degree days\text{Degree days}normalizing measureas shown

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Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.