Informational Guide

Costs When Running a Dehumidifier

You want to be able to figure out the cost per hour, per day, and per month for using these appliances.

by Josh M

Dehumidifiers work to remove the moisture from the air in your home. This helps to protect your belongings from dampness, moisture damage, and mold. Dehumidifiers are particularly effective in the summer months when humidity levels rise, and the moisture in the air becomes the most dangerous.

Dehumidifiers generally need to run for several hours to be effective, so it’s worth considering the running cost. Over the course of several weeks, months, and years the electricity used to run a dehumidifier can really add up.

Unless you have a very energy-efficient dehumidifier, it may be more than you think. This guide will help explain how much it costs to run a dehumidifier and other factors that will influence electricity usage.

Best Humidifiers in the Market

A dehumidifier needs electricity to function, and given the fact you’ll have to run it for several hours a day, it pays to understand how much it uses. The amount of electricity your dehumidifier uses is expressed in watts.

This is an indication of how much electricity flows through the device, or how much power it draws. Sometimes this is expressed as kilowatts per hour which is how many thousand watts are used by the machine every hour. Your dehumidifier should clearly advertise at least one of these figures on the box and in the product specifications.

The amount of electricity a dehumidifier uses depends on the make, model, energy efficiency, and size. Generally, the bigger the dehumidifier, the more electricity will be needed. A 30-pint dehumidifier may only use 300 watts, but a larger 70-pint dehumidifier will use about 900 watts.

You can find a full guide explaining how much electricity a dehumidifier uses here.

Light Bulb Energy Power Idea

Factors That Can Boost Up Dehumidifier’s Electricity Cost

There is no set cost to run a dehumidifier, and it can be impacted by many different factors. Here are a few of the top factors to be aware of which might impact your energy bill at the end of the month:

Extreme Humidity Levels

When it is extremely humid, there’s a lot more moisture in the air. Your dehumidifier will need to work harder and probably longer to deal with the excess moisture, which can lead to a rise in your energy bills. This is typically why dehumidifiers are more useful in the summer months rather than winter because the humidity levels spike.

Room Size

The bigger the room, the more work the dehumidifier has to do to regulate the moisture in the air. If you have the dehumidifier set to reach a certain level of moisture in the room, then it won’t switch off until it’s achieved it, and in a larger room, that means it’ll run for longer. This could lead to a spike in your electricity bill.

Therefore, it’s important you pick a dehumidifier that matches the size of your room so it can work effectively.

Room Temperature

The temperature of the room can have an impact on how hard the dehumidifier needs to work. A hot room will increase the amount of moisture in the air and make it more difficult for the dehumidifier to cool it down and condense the moisture from it. This can lead to a slight spike in the unit’s electricity consumption.

Local Energy Provider Rates

Rates for electricity vary considerably from town to town and state to state. The cost of your dehumidifier will be directly impacted by these rates, and you’ll need to understand them to predict the cost accurately. It’s also good to be aware if the rates are changing because it might impact how and when you use different devices.

Calculating the Electricity Cost Of Your Dehumidifier

It’s difficult to work out exactly how much your dehumidifier will cost, but you can work out a rough estimate. To do this, you’ll need to know the average cost of a kilowatt of energy in your area and the amount of power your humidifier draws.

You can find the average cost of a kilowatt of energy by looking at a recent utility bill or online. The power your humidifier uses should be shown clearly on the packaging and in the specifications.

Usually, this is in watts, but if it’s in volts and amps, then you’ll need to multiply them together to get the wattage. You then need to divide it by 1000 to get the kilowatt figure. Again, it is important to get these as accurately as possible to work out the electricity cost effectively.

Once you have these figures, then use the equation below:

Charge per kilowatt x number of kilowatts used by dehumidifier = electricity cost per hour

How Much Does It Cost To Run A Dehumidifier?

Knowing how much it costs to run a dehumidifier allows you to directly compare two models and see the actual difference in operating costs. To do this accurately, you want to be able to figure out the cost per hour, per day, and per month. Here’s a quick breakdown for each with worked examples:

Per Hour

To calculate the electricity cost per hour, you need to know the average cost of a kilowatt of energy and the number of kilowatts used by a dehumidifier:

Charge per kilowatt x number of kilowatts used = hourly cost

So for this example, let’s say the average cost of a kilowatt of energy is 13 cents (or $0.13), and the dehumidifier is a 30-pint model using 300 watts.

0.13 x (300/1000) = $0.039

Therefore your 300-watt dehumidifier would cost you 3.9 cents per hour.

Per Day

To understand the cost per day of the dehumidifier, you need all of the above and the average number of hours it will run for. Then the equation is:

(Charge per kilowatt x number of kilowatts used) x hours run = daily cost

So, for this example, let’s say the average cost of a kilowatt of energy is 13 cents ($0.13) again, the dehumidifier is a 50-pint model using 500 watts, and it runs for 10 hours a day.

(0.13 x 0.5) x 10 = $0.65

Therefore, your 500-watt dehumidifier would cost you 65 cents a day to run.

Per Month

Finally, to work out the monthly cost of a dehumidifier, you need all of the above, and then you need to multiply it by 30. The equation is;

((Charge per kilowatt x number of kilowatts used) x hours run)) x 30 = monthly cost

So, for this example, let’s say the average cost of a kilowatt of energy is 13 cents ($0.13) again, the dehumidifier is a 70-pint model using 900 watts, and it runs for 10 hours a day, 30 days a month.

((0.13 x 0.9) x 10)) x 30 = $35.10

Therefore, your 900-watt dehumidifier would cost you $35.10 a month to run.

Financial Analysis Accounting

Calculating Annual Dehumidifier Electricity Costs

Once you have your monthly figure, you can multiply that by 12 to work out the annual cost. We’ve given two worked examples below so you can see the differences between dehumidifiers and how much you could potentially save each year:

Dehumidifier 1 is a 50 pint, 500-watt machine, and the average cost is 13 cents ($0.13). It runs for 12 hours a day, 30 days a month.

(((0.13 x 0.5) x 10)) x 30))) x 12 = $234 a year

Dehumidifier 2 is an energy efficient 50-pint machine that only uses 300 watts. The average kilowatt per hour cost is 13 cents ($0.13), and it runs for 12 hours a day, 30 days a month.

(((0.13 x 0.3) x 10)) x 30))) x 12 = $140.4 a year

As you can see from the calculations above, the energy efficient dehumidifier saves you $93.60 a year. Over several years this translates into a huge saving, even if you spent more on the energy-efficient model in the first place.

People Also Ask (FAQ)

How energy-efficient are dehumidifiers compared to AC units?

A dehumidifier is much more energy-efficient than an AC unit and will be at least 3 times cheaper to run. AC units and dehumidifiers are very different, and one can’t replace the other, but you can get some combination units that are more energy efficient.

How much does it cost to run a dehumidifier 24/7?

Many dehumidifiers are designed to be used 24/7, and the true cost will vary depending on the factors listed above in this article. For a standard dehumidifier, it can be anywhere from $1 to $5, depending on how energy efficient it is.

Should you leave a dehumidifier on all the time?

Many dehumidifiers can be left on all the time, but you may not need to. It totally depends on the amount of moisture in your home and how best to manage it. If you are running your dehumidifier all the time, the energy bill will be higher.

Can one dehumidifier do a whole house?

Yes, specialist whole-house dehumidifiers can help to regulate the moisture in the air for your whole home.

Conclusion

Dehumidifiers are relatively low cost to run, but it pays to understand how much they can set you back each week. A good, energy-efficient dehumidifier can translate into hundreds of dollars worth of savings over the unit’s life, making it worth paying a little bit extra up front.

Hopefully, this article has helped explain how much it costs to run a dehumidifier and how you can work it out for yourself.

Josh M

My name is Josh and I am obsessed with the HVAC industry. I created this website to help HVAC techs of all levels get the best out of their heating & cooling systems. I have spent thousands of hours studying air conditioners, heaters and home air products so you can learn & buy with confidence. Learn more about the team here.

Top