Durabook Computers: energy use and running cost
The average model uses 24 kWh a year, which costs $5 a year at 21.0¢/kWh.
Most efficient models
| Model | kWh/year | Cost/year |
|---|---|---|
| Durabook R8 | 10 | $2 |
| Durabook R11 | 14 | $3 |
| Durabook R10 | 15 | $3 |
| Durabook U11 | 15 | $3 |
| Durabook S14I | 20 | $4 |
| Durabook S15 | 20 | $4 |
| Durabook Z14I | 24 | $5 |
- Refrigerators
- Freezers
- Washing machines
- Dishwashers
- Tumble dryers
- Room air conditioners
- Dehumidifiers
- Water heaters
- Electric cooktops and ranges
- Televisions
- Air purifiers
Source: ENERGY STAR (U.S. EPA) · 21.0¢/kWh (August 2026) · Methodology