ClueLuma

Fan electricity cost savings calculator

Convert shaft horsepower to input kW before multiplying avoided hours and price.

Units
Se=hp×0.746ηm×hsaved×ceS_{e} = \frac{\text{hp} \times 0.746}{\eta_{m}} \times h_{\text{saved}} \times c_{e}

Calculator

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

hp
fraction
h/yr
$/kWh
$/yr

Worked example

Given

  • hp\text{hp} = 18 hp
  • ηm\eta_{m} = 0.91 fraction
  • hsavedh_{\text{saved}} = 1,450 h/yr
  • cec_{e} = 0.14 $/kWh
Se=18×0.7460.91×1450×0.14≈2,995S_{e} = \frac{18 \times 0.746}{0.91} \times 1450 \times 0.14 \approx 2{,}995

Symbols and units

SymbolMeaningUnit
SeS_{e}electricity cost saved$/yr
hp\text{hp}loaded shaft powerhp
ηm\eta_{m}motor efficiencyfraction
hsavedh_{\text{saved}}avoided operating hoursh/yr
cec_{e}energy price$/kWh

Related calculators

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