Typical electricity cost
How much does an Attic Fan cost to run?
Based on typical usage
An Attic Fan typically uses about 300 watts, costing around $0.05 per hour at $0.15 per kWh.
At typical use (8 hours per day), that's about $10.80 per month and $43.20 for a typical 4-month cooling season.
Based on
- 300 watts
- 8 hours per day
- $0.15 per kWh
- 4-month cooling season
What affects cost most
- Average hours used per day
- Electricity rate in dollars per kWh
- How many active days or months the device runs each season
- Weather, insulation, and thermostat behavior
How it works: Daily cost uses wattage, hours per day, and electricity rate. Monthly uses daily × 30; cooling season uses monthly × 4.
Use the calculator below to estimate cost based on your own wattage, usage time, and electricity rate.
Calculator
Continue From This Estimate
Previous estimate
Keep your last result visible while you compare this calculator.
1. Device
2. Usage
3. Rate
Enter your values and click Calculate Cost.
Compare And Share
How these estimates stack up
Review the difference, then share the comparison or copy the current estimate link.
Difference
Run both together
Previous estimate
Previous calculator
Current estimate
Attic Fan
Comparison Route
Compare this next
Keep this estimate handy, then continue to the paired calculator.
Compare This Estimate
Compare this with another calculator
Open a related calculator and carry this estimate into the side-by-side comparison view.
Share This Estimate
Share this Attic Fan estimate
This link opens the calculator with your inputs filled in.
How Much Electricity Does an Attic Fan Use?
These example monthly costs show how active-season runtime changes the bill faster than small wattage differences do.
Example monthly costs
-
Light Use 4.8 hours per day$6.48/month
-
Typical Use 8 hours per day$10.80/month
-
Heavy Use 11.2 hours per day$15.12/month
Get a better estimate and keep costs down
Defaults are a starting point. Real cost changes most when runtime, wattage, and your electricity rate differ from the benchmark assumptions.
What changes cost most
- Average hours used per day
- Electricity rate in dollars per kWh
- How many active days or months the device runs each season
- Weather, insulation, and thermostat behavior
How to get a better estimate and lower cost
- Replace the default electricity rate with the actual rate from your latest power bill.
- Adjust daily runtime to match how long you actually use the equipment.
- Use thermostat or humidistat controls so the fan runs only when needed.
- Pair the fan with proper attic intake ventilation.
- Keep blades and shutters clean for smooth airflow.
- Compare attic ventilation improvements with active cooling alternatives.
Compare with related calculators
Use these related calculators to compare an Attic Fan against the closest next estimates people usually check.
Browse all Heating & Cooling calculators