How Long Does A Dehumidifier Take To Work Properly

When you’re dealing with a high humidity level, it’s important to have a dehumidifier on hand to keep the air quality under control. But how long does it take for a dehumidifier to start working?

This is a question that many people have. In this article, we will be discussing how dehumidifiers work and how long it takes for them to start removing moisture from the air.

How Do Dehumidifiers Work?

By removing moisture from the air, dehumidifiers use various methods, including evaporative cooling, mechanical removal, and condensation. Consequently, based on the level of dehumidification you choose, maintain the temperature level afterward.

Additionally, it draws air over a coil cooled to a low temperature using a refrigeration system, also known as a refrigeration dehumidifier.

As moisture collected in the room condensed on the cold surface, it was dropped into the bucket. Nowadays, desiccant dehumidifiers are used to remove moisture from the air.

The dehumidifiers pass the air through a wheel-coated moist absorbing surface and the desiccant absorbs the moisture. As a result, the collected moisture in the tank is damp.

Dehumidifiers work at different speeds depending on the type and the level of humidity in the room. It can take up to 24 hours for some dehumidifiers to reach a lower humidity level, while others can achieve this within a few hours.

It may take some time for a dehumidifier to begin working. Having the correct type of filter and setting up the machine properly will allow it to work at a lower humidity level.

It should be placed in a well-ventilated area, and the room temperature should be comfortable for the dehumidifier. When the dehumidifier is first plugged in, it should also be turned on to initiate cooling.

A man checking dehumidifier's water to run faster

How Long Does it Take a Dehumidifier to Start Working?

Dehumidifiers typically take between eight and twelve hours to begin removing moisture from the air. However, it begins to dehumidify as soon as it is turned on. It may take up to 10 hours for you to notice a change in your home’s humidity level.

This depends on a number of factors, including the size of the room, the capacity of your dehumidifier, and the level of humidity at the beginning and the end of the process. This time may vary, however, depending on the conditions in the room as well as the performance of the dehumidifier. A dehumidifier generally takes two hours to eliminate moisture from a room.

Below are a few tips for operating your dehumidifier correctly so that you can ensure the dehumidifier will work without any interruption.

Size of the room

To determine the effectiveness of dehumidifiers, it is necessary to determine the size of the room. It may take longer to prepare king-size bedrooms than medium-sized bedrooms, for example.

  • It depends on the square feet
  • Height of the ceiling
  • Free space in your room

#Dehumidifier type

We all know that dehumidifiers can help to reduce the humidity in a room, which can help to improve the air quality. There are a few factors to consider when selecting a dehumidifier, including

  • Size of the room (Size of the dehumidifier)
  • Type of dehumidifier
  • Amount of moisture that needs to be removed.

If you have a small dehumidifier, removing the water from the air circulation will take longer. However, if you use a large dehumidifier, you’ll be able to notify the difference in the air circulation within a few minutes.

So I think you first choose the right dehumidifier for your home to ensure that it will not take much time to start working.

#Dehumidifier placement

This is crucial as the dehumidifier should be placed where it can run the process effortlessly. The worst place to keep a dehumidifier is where the walls block it from behind. In contrast, the ideal location is in the center of the room.

Here we have mentioned the places you avoid placing the dehumidifier in your house.

  • In the corner where walls can block it from behind
  • Near the furniture
  • Other electrical devices

#Start by checking the humidity level

First, you should check the humidity level to see if it’s too high or low. A dehumidifier will work more effectively if the humidity level is between 40-60%. If the humidity level is too high, the dehumidifier may not be able to remove enough moisture from the air.

Whereas, if the humidity level is too low, the dehumidifier may not be able to cool the air enough. So figure out the right level & setting for your room and let the dehumidifier work its magic.

Windows and Doors

If the windows and doors are left open or constantly opened, the dehumidifier will not be able to achieve the target level, regardless of the humidity level.

Make sure that all the doors and windows are closed before turning on the machine in order to prevent the humidity from entering the house and increase the level of moisture.

Plug it in and turn it on properly

Typically, you have to turn a dehumidifier on before starting work. But what about when the dehumidifier is already working? How long does it take for it to start taking effect?

Most dehumidifiers will start working within a few hours of being plugged in. This is because the unit will need to warm up and start working its cooling system.

Once it’s up and running, the dehumidifier will work continuously to remove moisture from the air. So, in theory, it should take a while for a dehumidifier to start working properly, but in reality, it should start taking effect pretty quickly.

#Let it run until the humidity level is normal

It would be best to let your dehumidifier run until the normal humidity level. This will help to remove any excess moisture from the air. Most standard dehumidifiers will take around 8-12 hours to reach the desired level.

Humidity Levels

Humidity levels in your home are dependent on the duration of time for a noticeable change to occur.

It may take a dehumidifier longer to remove moisture from the air if you live in an area with high humidity or a rainy climate.

To achieve better results, you should run the dehumidifier throughout the day for several hours to remove the moisture from the air.

In addition, damp walls and floors may increase the level of humidity. Nevertheless, dry walls and floors will produce faster results, and you will notice the difference in a water tank when compared to drywall.

How Do I Know If My Dehumidifier Is Working?

If you doubt whether your dehumidifier is working or not, then check the solutions given below.


Most dehumidifiers have this option to measure the humidity levels in your house. After turning on the dehumidifier, you can check the humidity levels from the machine.

You can check the humid level an hour or two later to determine how fast or slow the dehumidifier works.

LED lights

The best way to notice whether your dehumidifier is working is to look at the LED lights—however, it depends on the dehumidifier model you use. There are many indicators, or only an ON/OFF button light is given in most machines.

However, if these are not working or lights up, it doesn’t mean that the dehumidifier isn’t working. It might be inherent in the machine. So, Don’t make a decision only depending on these LED lights.

Also, these lights will last longer than the dehumidifier, so you can detect the lights and Humidistat to determine whether the machine is working.


This device will help you know your room’s humidity level during the dehumidifier is running.

You don’t need this device if you have builtin a humidistat in your dehumidifier. If it doesn’t, then you might have to purchase a hygrometer. Check before turning on the dehumidifier and when you turn on the device to detect the difference.

Water Tank

Ensure to check the water tank before using it every time and if it is full, empty the dehumidifier’s water tank.

The moisture collected from the air is condensed by a dehumidifier and stored in an inbuilt water reservoir, also known as a water tank.

This might be the reason that your dehumidifier isn’t working correctly. However, within five or ten minutes of running the dehumidifier, you won’t be able to see any water or condensation due to the slow process.

A full water tank can cause an overflow and even cause functional problems if you don’t empty the bucket.

Hose pipe

You must check the end if your dehumidifier has a hosepipe to remove the water. Suppose you find any signs of water droplets coming out from the dehumidifier.

After more than six hours of running the dehumidifier, you might see the water droplets through the back end of the hosepipe connected to the machine. There might be a chance that your hosepipe isn’t connected correctly.

If your dehumidifier is not working, it may be due to several things.

  • First, check the power cord to make sure it is plugged in and working.
  • Second, check the water level.
  • Third, check the dehumidifier’s filter.

If all of these things are checked, and the dehumidifier is still not working, it may be due to a problem with the machine itself. In this case, you will need to take it in for repair or replacement.

Dehumidifier Working

How Long Should You Run a Dehumidifier a Day?

Depending on the size of the room and the humidity level, a dehumidifier may need to run for a few hours or overnight.

Generally, if the humidity is below 30%, the dehumidifier should run for 8-12 hours each day; if the humidity is between 30-50%, it should run for 6-8 hours each day; and if the humidity is above 50%, it should run for 4-6 hours each day.

Overall, a dehumidifier takes time to work. So it’s recommended to run a dehumidifier for at least 12 hours a day so that the machine can work effectively.

When is the Best Time of Day to Use a Dehumidifier?

There is no definitive answer to this question as it will depend on the individual’s climate and the size of the room being dehumidified. Generally speaking, it’s best to use a dehumidifier in the morning or evening when the room is relatively cool.

If you just purchased the dehumidifier, you must run it for 24 hours for several days. Here we have mentioned the best time to use the dehumidifiers.


While cooking, you can turn on the dehumidifier because boiling water or making food does make water evaporates moisture, so cooking is the best time to use this device.


Anything related to the water does affect your air circulation in the house, especially hot showers. After taking a shower, you can turn on the dehumidifier to soak all the moisture from the air.

Drying cloths

Drying clothes increases humidity in the air, specifically if using a laundry room to dry clothes.

It will increase the humidity and eventually double the time of dehumidifier processing. However, you might cheat by turning on the heater in your laundry room to soak moisture from the clothes. At the same time, use dehumidifiers for other rooms.

There are some other facts that you can run the dehumidifiers

  • Weather
  • the rate of extraction by a dehumidifier
  • the relative humidity target.
  • During the summer season or when it humid
  • Leakage in your house
  • After applying fresh plaster
  • Freshly bought the dehumidifier

Should I Run A Fan With a Dehumidifier?

Fans are typically not necessary when using a dehumidifier, as the machine will work to remove moisture from the air.

However, if you are experiencing high humidity levels in your home, it may be helpful to run a fan to help circulate the air. This will help to reduce the amount of moisture in the air, which can help to reduce the need for a dehumidifier.

Below are some additional tips to reduce humidity in your room quickly.

  • Using an air conditioning unit that can control the humidity level in the room.
  • Wearing clothing that can absorb sweat and moisture.
  • Keep windows and doors closed when the room is humid.
  • Avoid using plants and flowers in the room to add moisture to the air.

Do Dehumidifiers Lose Effectiveness Over Time?

Over time, dehumidifiers may lose effectiveness, as the moisture they remove will start to accumulate again.

This can cause the room to become more humid and the dehumidifier to work less effectively. If the room is already much humid, the dehumidifier may not be able to work as effectively, and the room may become more humid.

Moreover, if you use a dehumidifier daily, it will lose effectiveness at five years maximum. But if you maintain it very carefully, only use it in humid seasons, or don’t use it daily, it can work for ten years.

In addition, you must clean the grills, replace the air filters, and clean and empty the water bucket often.

Best Dehumidifiers For Laundry Room

There are a few factors to consider when purchasing a dehumidifier for your laundry room: the size of the room, the type of dehumidifier, and the features you need.

One of the most important factors to consider is the size of the room. Larger rooms will need larger dehumidifiers that can handle more water, while smaller rooms may use a smaller, more compact model.

Another important factor to consider is the type of dehumidifier. Some dehumidifiers work by removing water from the air, while others remove moisture.

Finally, you’ll need to decide what features you need. After that, you need to choose a dehumidifier based on the features you need.

The Bottom Line

A dehumidifier can work wonders when it comes to restoring air quality. By removing moisture from the air, the unit can help to lower the humidity levels and improve air quality.

To work a dehumidifier perfectly, it is important to consider a few factors, such as the size of the room, the type of dehumidifier, and the features you need.

So don’t panic; run your dehumidifier and take your time. Your dehumidifier will automatically start working when perfectly ready for operation.

However, by following these simple steps, you can make sure your dehumidifier is up and running in no or less time!

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I am Ramiro Garcia, founder and author of Garage Ever with a love of all things space. I have created this blog to share resources everything related to auto care and garage. I have a garage and parter with my friend and we started this as a hobby and now it’s our full-time job. I love what I do and enjoy sharing that with you.

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