Windmill Room air conditioners: energy use and running cost
The average model uses 584 kWh a year, which costs $123 a year at 21.0¢/kWh.
Most efficient models
| Model | kWh/year | Cost/year |
|---|---|---|
| Windmill 08W2Wi | 400 | $84 |
| Windmill 10W2Wi | 500 | $105 |
- Refrigerators
- Freezers
- Washing machines
- Dishwashers
- Tumble dryers
- Dehumidifiers
- Water heaters
- Electric cooktops and ranges
- Televisions
- Computers
- Air purifiers
Source: ENERGY STAR (U.S. EPA) · 21.0¢/kWh (August 2026) · Methodology