The energy consumption of a dehumidifier is quite minimal. A typical little 30-pint dehumidifier consumes 300W of power. A dehumidifier uses less electricity than a water heater, air conditioner, or hairdryer. A dehumidifier uses roughly the same amount of electricity as a computer.
Check out our best pick dehumidifier Dri Eaz LGR 7000XLi Dehumidifier.