Dehumidifier Power Efficiency: Do Dehumidifiers 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.

3 thoughts on “Dehumidifier Power Efficiency: Do Dehumidifiers 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.

  2. Talk about a misleading article. The math to calculate the amount of electricity cost is correct, but this math results in the completely opposite conclusion that YES, DEHUMIDIFIERS USE AN ENORMOUS AMOUNT OF ELECTRICITY. For most homeowners with gas-heated homes, AN AIR CONDITIONER IS THE ONLY SINGLE APPLIANCE THAT MAY SIGNIFICANTLY AFFECT YOUR ELECTRIC BILL MORE THAN A DEHUMIDIFIER.
    The only functional difference between an air conditioner and a dehumidifier is that with a dehumidifier, the condenser and evaporator coils are both inside, so they are doing all of the same work as an air conditioner, but then just blowing the heat removed from the air back inside, as opposed to an air conditioner that pipes the collected heat outside to be expelled, so it’s almost like running an air conditioner and a heater at the same time, which is insanely inefficient (you could achieve the same result by running a window unit air conditioner completely inside the house, but you better find a way to get the condensation piped to a drain!)

    It is a completely unfair comparison to say “a dehumidifier uses less electricity than a coffee maker” because a coffee maker is only consuming that higher wattage of electricity for about 10 minutes in order to brew a pot of coffee, while a dehumidifier will generally be running all the time (or at least plugged in and turned on, ready to engage at any time based on humidity level) to keep humidity under control.

    My 50 pint Danby dehumidifier is rated at 7.8A, which would be 936W max.


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