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Dehumidifier Efficiency – How Much Electricity Does A Dehumidifier Use?

Dehumidifier Power Usage cost

The majority of dehumidifiers require energy to operate. Depending on how often you turn yours on to regulate the humidity in your surroundings, the electricity usage will vary. With concerns regarding climate change and the carbon footprint we leave behind each day, energy use is a serious issue. So, it is good to understand exactly how much power your dehumidifier consumes.

In this article, we will explore how dehumidifiers use energy and how much different sized dehumidifiers typically cost to operate on a regular basis. We will also offer suggestions on how you can reduce your energy costs if you own and operate an older model dehumidifier.

But first, we should take a moment to better understand what an electric dehumidifier does.

What Is An Electric Dehumidifier?

A dehumidifier is a device used to remove water moisture from the air. Electric dehumidifiers do this by cooling the air. Warm air passes over a cooling element, which then cools and causes moisture to condense into water. The water drops to a collection vessel for removal.

The cooling element and fan that blows warm air to it require electricity to function.

Understanding Dehumidifier Power Usage

Different manufacturers design and build many different models of electric dehumidifiers. Each has a specific energy rating that has been measured through a testing process. This information is typically printed on the packaging of a dehumidifier and is often also posted on the actual product. The dehumidifier wattage (in Watts (W) or kilowatts (kW)) is a measurement used to indicate how much energy is being used.

Below we have a breakdown of dehumidifier power consumption ratings of some commonly found dehumidifiers of various sizes. Costs below are based on the following assumptions:

  • Usage = 8 hours usage/day
  • Electricity price = $0.15c/kWh
  • Power consumption (W) values provided by manufacturers are accurate.

Of course, costs will vary depending on whether any of the above assumptions differ.

Formula To Calculate Power Costs

To calculate the costs of running your dehumidifier (or any electrical appliance), use the formula below:

Daily Cost ($/day)
= Dehumidifier Power Consumption (W) x Electricity Price ($/kwh) x Daily Usage (Hours) / 1000

Large Dehumidifiers

Frigidaire 70-Pint Dehumidifier
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Example: Frigidaire FFAD7033R1, 70 Pint

Power Consumption = 745W (more information)

The Frigidaire FFAD7033R1 is a large-sized 70-pint dehumidifier. The amount of water/moisture per day it can remove is noted in the pint measurement (70 pints/day, or 33 liters/day). The power consumption of this product is listed as 745W.

The formula to calculate the daily/annual cost to operate this particular dehumidifier is:

Operating Cost = 745W x $0.15c x 8hr / 1000 = 89.4c/day = $326/year

Medium Dehumidifiers

frigidaire 50 pint dehumidifier
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Example: Frigidaire 50-Pint

Power Consumption = 530W (more information)

The Frigidaire 50-Pint dehumidifier is rated at using 530W of power. The formula for this model dehumidifier would be:

Operating Cost = 530W x $0.15c x 8hr / 1000 = 63.6c/day = $232/year

Note that the smaller the dehumidifier is, the lower the power consumption rating generally is. This unit requires 530W of energy compared to the larger dehumidifier example above that is rated at 745W.

Small Dehumidifiers

Ivation 30 Pint Dehumidifier
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Example: Ivation 30 Pint

Power Consumption = 345W (more information)

Ivation has a 30-pint model that has a power consumption of 345W. Using our power consumption formula:

Operating Cost = 345W x $0.15c x 8hr / 1000 = 41.4c/day = $151/year

Mini Dehumidifiers

Eva-dry Edv-1100 Electric Petite Dehumidifier
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Example: Eva-dry Edv-1100

Power Consumption = 22.5W (more information)

The Eva-dry Edv-1100 is rated to remove 8 ounces of moisture per day that uses only 22.5W. The cost of running this dehumidifier is:

Operating Cost = 22.5W x $0.15c x 8hr / 1000 = 2.7c/day = $9.85/year

It is important to know that obviously the larger the dehumidifier, the more it will cost to operate. However, it also means that bigger dehumidifiers will extract more moisture from the air which contributes to the higher cost and won’t necessarily be the most energy-efficient dehumidifier.

What Determines The Cost To Run A Dehumidifier?

Aside from the size of the dehumidifier, there are a number of factors that determine the amount of energy one will require to operate. The top factor is how often you use the dehumidifier. If you only need it during the warmer summer months, this will reduce your annual cost.

However, if your home has an ongoing moisture problem, you may use a dehumidifier daily and for longer hours. Based on the rate of $0.15c per kilowatt of energy, you can see from the breakdown noted above that even the large dehumidifiers are still relatively affordable to operate.

Older Vs Newer Dehumidifiers

Primarily because concerns related to dehumidifier energy usage have become a fairly recent issue, dehumidifiers have gone through a bit of a remodeling phase. This generally means that the newer your dehumidifier is, the more energy efficient it will be.

This is simply because the standards of today did not exist just a few years ago. This also means that newer models will also perform better than older ones. It is for this reason that upgrading to a more modern dehumidifier makes good sense saving you on energy costs.

How Efficient Are Newer Dehumidifiers?

Modern dehumidifiers are designed to use less energy in order to remove moisture from the air. Typically, some models can record up to 20% more efficiency compared to the average. With a properly functioning unit, this much saving in energy costs can be significant.

Other Ways To Reduce Dehumidifier Costs

If you are not prepared to upgrade to a newer, more efficient dehumidifier model, you can still take control of your costs. Reducing the amount of time you rely on your dehumidifier is a great way to save on energy. Plus, it will reduce wear and tear on your unit.

By using fans to better circulate the air is another way to cut down on your energy use. Although electric fans will require energy to operate, they do not require nearly as much as your average dehumidifier. Opening windows can also reduce humidity and condensation in your home.

Use Your Dehumidifier Properly For Best Results

Dehumidifiers function best in cooler temperatures but can experience problems when operated in temperatures that are below 60 degrees F. This is because very cold temperatures can cause the cooling coils or other parts of the dehumidifier to freeze over and become damaged reducing dehumidifier efficiency.

In Conclusion

Electric dehumidifiers use varying amounts of energy depending on their size. The newer the dehumidifier is, the more energy-efficient it can be. Regardless of how often you use one, in general terms, dehumidifiers are not that expensive to operate.

However, if you desire to conserve energy, you don’t always have to use an energy-efficient dehumidifier. You can reduce the humidity in your living space by opening windows and using electric fans to circulate the air. Or you can reduce how often you use your dehumidifier.

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