Combined normalized intensity calculator

Divide by the selected product of activity, weather and area only when that normalization is justified.

Units

I = \frac{\text{Energy}}{\text{Production} \times \text{Degree days} \times \text{Floor area}}

Calculator

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

Given

$\text{Energy}$ = 720,000,000 Btu
$\text{Production} \times \text{Degree days} \times \text{Floor area}$ = 240,000,000 as shown

I = \frac{720{,}000{,}000}{240{,}000{,}000} = 3

Symbol	Meaning	Unit
$I$	normalized energy index	Btu/(unit·degree-day·ft²)
$\text{Energy}$	energy in the period	Btu
$\text{Production} \times \text{Degree days} \times \text{Floor area}$	normalizing measure	as shown

Symbol	Meaning	Unit
$I$	normalized energy index	MJ/(unit·K·day·m²)
$\text{Energy}$	energy during the period	MJ
$\text{Production} \times \text{Degree days} \times \text{Floor area}$	normalizing measure	unit·K·day·m²

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