Dehumidifier Energy Efficiency: Do They Use A Lot Of Electricity?

As with every device powered by electricity, it makes sense to look into dehumidifier energy use.

When looking at how many watts does a dehumidifier use, you can see that dehumidifiers don’t draw that many amps or watts.

For everybody worried if dehumidifiers are expensive to run, here’s a quick answer: No.

Do dehumidifiers use a lot of electricity?

How Many Watts Does A Dehumidifier Use?

Dehumidifier energy use is rather low. An average small 30-pint dehumidifier uses 300W of energy. An average big 70-pint dehumidifier uses 700W of energy.

To put the energy use in perspective, here are how many watts some other devices draw:

how much wattage do dehumidifier draw compared to other appliances

Essentially, a dehumidifier draws much less electricity than a water heater, an air conditioner, even a hair drier. An average dehumidifier draws about as much energy as a computer.

Nevertheless, it makes sense to buy the most energy-efficient dehumidifier. Let’s see how we can evaluate which dehumidifiers are more energy-efficient than others. 

Running the most energy-efficient dehumidifier for 10 hours can cost you less than $1.

Calculating The Energy Efficiency Of Dehumidifiers (Energy Star Label)

Energy-efficiency of dehumidifiers is expressed by ‘Energy Factor Value‘ or EEV for short, measured in liters per kilowatt-hour (L/kWh). By knowing the capacity and power of a dehumidifier, we can (with a bit of unit conversion) calculate the energy factor for every dehumidifier. 

Here’s a quick calculation of how much running an EEV 2.0 (very energy-efficient) dehumidifier costs versus an EEV 1.0 (very energy-inefficient) dehumidifier. For the energy usage calculation, let’s assume the following:

  • Both of them have a 70-pint capacity.
  • We run them for 1,000 hours.
  • The average cost of a kilowatt-hour (kWh) is 13.19 cents.
Energy-Efficient Dehumidifier (EEV = 2.00) Energy-Inefficient Dehumidifier (EEV = 1.00)
(Yearly) Electricity cost: $91,01 (Yearly) Electricity cost: $182,02

It’s quite evident that it makes sense to shot for the more efficient dehumidifiers. Here the difference in electricity bill can be almost $100/year. The energy-efficiency has the biggest effect in the case of big commercial dehumidifiers. That’s why we ranked commercial dehumidifiers based on energy-efficiency in this post

In the list of the best dehumidifiers you can check here, we’ve calculated the energy factors and took them into account when specifying which ones are the best. All of them have the Energy-Star label for high energy efficiency. You can check the requirements for the Energy-Star label of the dehumidifier here.

Opt for dehumidifiers with high energy-efficiency to drive down the electricity costs. Dehumidifiers with the EEV of 1.5 or above are ideal.

2 thoughts on “Dehumidifier Energy Efficiency: Do They Use A Lot Of Electricity?”

  1. My roommate has the large Frigidaire humidifier she runs it at night so approximately 8 to 10 hours a night but it is plugged in 24 hours a day my electric bill it’s like $60 more than it usually is does that have anything to do with it believe it’s a 70-pint

    • Hello Judy, let’s presume a Frigidaire dehumidifier (70-pint) runs on 700W and it runs 10h per day. In a month, that 300h running time, and electricity expenditure of 210 kWh. 1 kWh might cost up to 30 cents; that means that 210 kWh * $0.30 per kWh = $63 per month. Sounds about ‘$60 per month more on electricity’, right? When it’s plugged in and not running, it doesn’t spend any electricity (or just an absolute minimal amount). Running a large 70-pint dehumidifier can incur such costs. Hope this helps.


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