Is It Safe to Run a Dehumidifier Constantly All the Time?

To dehumidify or not to dehumidify?

That is the question. We know that it is difficult to suffer through any length of time with high humidity rates. But should a dehumidifier run all the time? That is the question. There are differing opinions on this subject.

To get the right answers just continue to read our article. It is filled with the information you need. Some of the benefits you get from running your dehumidifier for long periods of time is a comfortable living space, a healthier room to sit in. And protection for your health and possessions.

Should a Dehumidifier Run Constantly?

The good news is that there is no strict rule on this topic. That means you can run your dehumidifier 24 hours a day without harming the device. One thing to remember is that the dehumidifier is rated by how many pints of moisture it can remove in a 24 hour period.

If the machine does not shut off at any point, then you know that the humidity levels are far too high. The vital piece of information is that once the dehumidifier hits its rated level, say 50 pints per day, then it will not remove any more than that, no matter how many hours are left in a day.

There is nothing wrong with doing this. Some experts claim that you should run the device until the RH levels go below 60%. When that happens you can turn the unit off for a while.

What will help you determine if you should run your dehumidifier for long periods of time is using a hygrometer. This measuring tool will help you find when you should or should not run your dehumidifier.

Do You Need to Run a Dehumidifier All the Time?

No, it is not necessary to run your dehumidifier all the time. You should only run your unit when the humidity level is above 50%. The comfort levels for most homes is between 30 to 50% so that is a good rule of thumb to live by.

The key here is not to set your humidistat too low. That will waste energy by keeping your unit running when it should be turning off.

Are Dehumidifiers Expensive to Run?

The money you have to pay extra on your electric bill will be determined by the type of dehumidifier you buy. If you purchase a small 500 ml unit then you are looking at using only 12 Watts per hour.

If you move up to a 12L unit then you are looking at paying for 207 watts per hour every hour it is on. When the dehumidifier reaches the set humidity level it will turn off saving you some money. The same goes for the auto shut off that kicks in when the bucket is full.

If you want to justify the expense of running your device for long periods of time, compare its cost to the amount of money you would have to pay if the humidity levels ruined your walls, floors, furniture and other important things like your health. Mold is unhealthy and it grows fast when the humidity levels reach 65% or higher.

The cost of running a dehumidifier 24/7 is cheaper than the costs we just mentioned.

How Much Does It Cost to Run a Dehumidifier 24 Hours a Day?

This is another depends question and the answer will be influenced by your location. Some cities charge higher rates than others and so on. Then the size and type of the dehumidifier you buy will determine part of the expense but it isn’t that high.

A small 330 Watt Desiccant Dehumidifer may only cost about 5 to 10 cents to run every hour. Times that by 24 and you are looking at $1.20 to $2.40 per day to protect your home and family

650 Watt Desiccant Dehumidifier may only cost about 10 to 20 cents per hour. A lot will depend on the maker, the model, and the efficiency rating of the device.

However, don't bother running a dehumidifier constantly if needed because most of the top dehumidifiers we tested are Energy Star rated.

How Long Should I Run a Dehumidifier After a Flood?

This will depend on how big the building is that you want to dry out. You should run the dehumidifier long enough for the porous surfaces or materials to dry completely. This can take anywhere from 2 days to several weeks

Items like drywall and insulation take a very long time to dry so instead of running your dehumidifier replace those items. Mold will grow as long as there is moisture to feed it.

Is It Cheaper to Run AC or Dehumidifier?

The answer to this question is that it is cheaper to run your dehumidifier. Part of the reason for this is that the dehumidifier does not cool the air down in the room like an air conditioner does.

That means the unit does not use as much power because there are fewer things to power in a dehumidifier than there is in an air conditioner.

If you need a device just to solve your humidity & mold problems in the most effective way possible, go for dehumidifier.

Final Thoughts


It is possible for you to relax. This information should set your mind at ease as it lets you know that there is nothing wrong with running your dehumidifier for long periods of time.

You can also run it for 24 hours straight if you want. Just do not be surprised that the device shuts down when it has reached its capacity for moisture removal. Certainly the benefits will outweigh the costs.

Running your unit when you need it and for as long as you need it protects your home and helps keep your family healthier. When you need to protect an allergy or asthma sufferer the cheapest device to use is your dehumidifier.

The overall costs are not that much and should easily be absorbed into your budget. But those few extra dollars are worth spending when you can have peace of mind and healthier each day and night. So run your dehumidifier and be safe.

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