Window Fan in Honolulu — $37/yr to Run (42.5¢/kWh)
Your window fan in Honolulu costs about $3/month at 42.5¢/kWh. See daily, monthly, and yearly costs, plus tips to cut your bill.
Honolulu, HI Electricity Rate
42.5¢/kWh
Utility: Hawaiian Electric (HECO)
+227% vs national avg
National avg: 13.0¢/kWh
Daily Cost
$0.31
0.7 kWh/day
Monthly Cost
$3.06
7 kWh/mo
Annual Cost
$37
86 kWh/yr
Lifetime (8yr)
$294
energy only
Monthly Cost Breakdown in Honolulu
| Period | kWh | Honolulu Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 0.7 | $0.31 | $0.09 | +$0.21 |
| Weekly | 5.0 | $2.14 | $0.66 | +$1.49 |
| Monthly | 7.2 | $3.06 | $0.94 | +$2.13 |
| Quarterly | 21.6 | $9.19 | $2.81 | +$6.38 |
| Annual | 86.4 | $36.75 | $11.23 | +$25.52 |
Customize Your Window Fan Cost
Adjust usage hours and electricity rate to calculate your exact cost in Honolulu.
Daily
$0.31
Monthly
$3.06
Annual
$37
8-Year
$294
Energy Saving Tips for Window Fan in Honolulu
- ✓Honolulu electricity rates are 227% above the national average — energy efficiency matters more here.
- ✓Honolulu's warm climate (avg 83.7°F) means higher cooling costs — consider ceiling fans to supplement.
- ✓Use at night to bring in cool air
- ✓Set to exhaust mode when cooking
- ✓Use with open windows on opposite side
Highest-Cost Appliances in Honolulu, HI
See which appliances cost the most to run at Honolulu's 42.5¢/kWh electricity rate.
Level 2 EV Charger (240V)
Transportation · 7,200W
$5,513/yr
$459.43/mo
Electric Furnace
HVAC · 10,000W
$3,829/yr
$319.05/mo
Electric Tankless Water Heater
Water Heating · 18,000W
$2,795/yr
$232.91/mo
EV Charger (Level 2)
Garage · 7,200W
$2,757/yr
$229.72/mo
Boiler (Electric)
HVAC · 6,000W
$2,297/yr
$191.43/mo
Electric Water Heater (Tank)
Water Heating · 4,500W
$2,096/yr
$174.68/mo
Water Heater (Tank Electric)
Water Heating · 4,500W
$2,096/yr
$174.68/mo
Heat Pump
HVAC · 2,400W
$1,634/yr
$136.13/mo
Window Fan Cost in Other Hawaii Cities
| City | Rate | Annual Cost | vs Honolulu |
|---|---|---|---|
| Honolulu (current) | 42.5¢ | $37 | — |
| Maui | 41.5¢ | $36 | $-1 |
Window Fan Energy Cost FAQ — Honolulu, HI
Understanding Window Fan Energy Costs in Honolulu, HI
Honolulu is a mid-sized Hawaii city where residential electricity rates from Hawaiian Electric (HECO) are shaped by regional energy supply and local demand patterns. Running a low-draw appliance like the Window Fan (120W) at Honolulu's rate of 42.5¢/kWh costs approximately $37 per year — $26 more than the national average of $11.
Electricity in Honolulu is significantly more expensive than the national average — 227% higher. For a Window Fan used 6 hours per day, this rate premium adds up to $26 in extra annual costs. Energy-efficient models and usage habits have an outsized impact in high-rate markets like this.
Honolulu has a high cost of living (index: 193), which means electricity is just one of many above-average expenses. Reducing appliance energy costs — even by small amounts — contributes to meaningful household savings in this market. Since no ENERGY STAR or smart version is currently available for this appliance, reducing usage hours is the primary way to cut costs.
In Honolulu's warm climate (avg 83.7°F), HVAC-related appliances tend to run more frequently, compounding energy costs. A Window Fan produces approximately 0.06 tons of CO2 annually at typical usage. Honolulu residents can reduce this footprint by optimizing usage patterns, or investing in solar — see our solar savings calculator for Honolulu.
Compare All Energy Costs in Honolulu
See energy costs for 178+ household appliances at Honolulu's local electricity rate.
Frequently Asked Questions
How much does it cost to run a Window Fan in Honolulu, HI?
At Honolulu's average electricity rate of 42.5¢/kWh, a Window Fan costs approximately $37 per year to run. That's about $3.06 per month with typical usage of 6 hours per day.
What is the electricity rate in Honolulu, HI?
The average residential electricity rate in Honolulu, HI is 42.5¢/kWh, which is 227% above the national average of 13.0¢/kWh. The primary utility provider is Hawaiian Electric (HECO).
How much electricity does a Window Fan use per year?
A Window Fan uses approximately 120 watts and consumes about 86 kWh per year with typical usage of 6 hours/day for 120 days/year.
Is a Window Fan expensive to run in Honolulu?
Compared to the national average cost of $11/year, running a Window Fan in Honolulu costs $26 more per year due to higher local electricity rates.
How can I reduce my Window Fan energy cost in Honolulu?
To reduce Window Fan costs in Honolulu: Use at night to bring in cool air. Set to exhaust mode when cooking. Consider using a smart plug to monitor and optimize usage. Also check with Hawaiian Electric (HECO) for local energy efficiency rebates and programs.