Fan Energy Cost Calculator
Running cost of a fan per day, month and year.
Enter your values
ⓘ Live results
Results
- Daily cost
- 0.37
- Monthly cost
- 11.18
- Annual cost
- 134.03
- Annual kWh
- 745
- Cost per 1000 CFM-hours
- varies with fan efficiency
Quick answer
Fan running cost is watts times hours divided by 1,000, multiplied by your electricity rate.
cost = W x hours / 1000 x rate
How to use the Fan Energy Cost Calculator
- 1Enter the fan's actual input watts, not the motor nameplate horsepower.
- 2Set the hours per day it really runs.
- 3Compare an ECM upgrade against the annual figure to see payback.
Worked example
Using the values the calculator loads with:
Inputs
- Fan power85 W
- Hours per day24 h
- Electricity rate0.18 per kWh
Results
- Daily cost0.37
- Monthly cost11.18
- Annual cost134.03
- Annual kWh745
- Cost per 1000 CFM-hoursvaries with fan efficiency
Frequently asked questions
ECM vs PSC savings?
An ECM blower often uses a third of the watts of a PSC at low speed, saving 200-400 kWh a year.
Does speed control help?
Hugely — halving speed cuts power to about an eighth.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.