Cooling electricity savings calculator

Reduced lighting heat decreases cooling electricity during cooling hours.

E_{\text{cooling}} = \frac{\Delta \mathrm{kW} \times H_{\text{cooling}}}{\mathrm{COP}}

Calculator

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

Given

E_{\text{cooling}} = \frac{100 \times 4000}{4} = 100{,}000

Symbol	Meaning	Unit
$E_{\text{cooling}}$	cooling energy saved	kWh/yr
$H_{\text{cooling}}$	equivalent cooling hours	h/yr
$\Delta \mathrm{kW}$	lighting heat reduction	kW
$\mathrm{COP}$	cooling coefficient of performance	—

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