Dehumidifiers run their compressor continuously or nearly so to pull moisture from air, typically using 500–700 watts while operating. They're especially energy-intensive in humid climates or basements where they may run 12+ hours daily.
| Basis | Cost |
|---|---|
| Per hour (while running, 500 W typical) | $0.094 |
| Per day (10 h/day, 7/7 days) | $0.94 |
| Per month | $28.66 |
| Per year | $343.88 |
| Hourly range (small 300 W – large 700 W) | $0.056 – $0.13 |
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