Exhaust Fan Operating Cost Calculator
Annual electrical operating cost of an exhaust fan.
Enter your values
ⓘ Live results
Results
- Annual electrical cost
- $38.33
- Annual energy use
- 255.5 kWh
- Monthly cost
- $3.19
- 10-year cost
- $383
Quick answer
Annual exhaust fan electrical cost depends on wattage, runtime hours, and local electricity rate — a small continuous fan can still add up over a full year.
Cost = watts / 1000 x hours/year x $/kWh
How to use the Exhaust Fan Operating Cost Calculator
- 1Enter the fan's rated power draw in watts.
- 2Enter its typical daily runtime.
- 3Enter your electricity rate to see annual, monthly and 10-year operating cost.
Worked example
Using the values the calculator loads with:
Inputs
- Fan power draw70 W
- Runtime10 hours/day
- Electricity rate0.15 $/kWh
Results
- Annual electrical cost$38.33
- Annual energy use255.5 kWh
- Monthly cost$3.19
- 10-year cost$383
Frequently asked questions
Do EC/ECM fans cost less to run?
Yes — electronically commutated motors typically use 50-70% less power than shaded-pole motors of similar CFM.
Should I include makeup air heating/cooling cost?
Use the spot exhaust energy cost calculator for that — this tool covers electricity only.
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.