How to Reduce Dehumidifier Noise: 9 Ways To Make It Silent

  • Author: Irene Batres
  • Date: December 30, 2022
  • Time to read: 7 min.
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Dehumidifiers are naturally noisy, but there are easy and quick ways to check if there is an abnormal cause to your dehumidifier’s noise, such as ensuring it’s standing level, or that its parts are working properly. 

Otherwise, using tricks such as placing the dehumidifier on the carpet can help reduce noise.

In this article, we will look at all the ways dehumidifiers can cause noise, how to address the problems, why excess noise is bad for your health, and how to reduce dehumidifier noise once and for all.

How To Reduce Dehumidifier Noise?

If the noise is abnormal, such as it making a buzzing, clicking, or rattling sound that is one key indicator that your dehumidifier is in need of a repair. Otherwise, there are other ways to minimize noise, such as employing soundproofings like a carpet or location placement.

Below let’s take a closer look at each reason.

1. Is Your Dehumidifier Level?

The abnormal noise may be due to an unlevel dehumidifier, which can be fixed by adjusting the legs of the dehumidifier until it’s sitting straight.

2. Does Your Dehumidifier Have Loose Screws?

Another cause for noise, especially a rattling noise, is loose screws. 

These parts can rattle themselves, or hold panels and components loosely, and can be fixed by tightening all screws.

Vibrations that come from loose screws will likely cause more noise problems in the future, so it is better to check if this is the source and soundproof your dehumidifiers by tightening all loose components as soon as possible.

3. Is there Adequate Airflow for Your Dehumidifier?

A limit to the function of your dehumidifier’s airflow can cause an abnormal sound and is best addressed by checking the airflow. 

However, before calling a professional to check the airflow and its components, check the air filters yourself.

Air filters are inexpensive, easy to check, and easy to replace, and old air filters can cause the dehumidifier to work too hard to suck air through it, causing abnormal noises. 

It can also interfere with electricity consumption and can create extra, unnecessary heat from overworking.

4. Does Your Dehumidifier Have Dirt in it?

Another cause for abnormal sound, especially if it is a consistent humming noise, is a buildup of dirt along the inner side of your dehumidifier. 

This can interfere with airflow and your dehumidifier’s performance, along with creating extra noise, and should be addressed quickly with a vacuum or cleaner.

The best way to do this is to remove components that will give you direct access to the dehumidifier’s airflow, and vacuum or clear out any buildup that you see.

5. Does Your Dehumidifier Have a Leak?

Leaks are another cause for abnormal noise in dehumidifiers, which are difficult to tackle unless you can spot the source of the leak, such as a leak in the compressor. 

If a specific part, such as the compressor, has a leak, then it’s just a matter of replacing it.

However, sometimes leaks are not so obvious and may require a professional to come to take a look and solve the problem.

6. Utilize a Carpet to Dampen Your Dehumidifier’s Sound

Carpets, due to their squishy and voluminous material, are excellent sound barriers to muffle a noisy dehumidifier and are as simple as placing your dehumidifier on top of a carpet of your choice.

The carpet material is important to look at as well, with wool being the most sound-absorbing of all carpet materials. 

Not only does it muffle the sound of a room if it’s laid on the entire floor surface, but it also muffles sound from contact and friction, and will definitely reduce the sound you hear from your dehumidifier.

7. Check the Blower Wheel For Noise

The blower wheel may also have a slight wobble, which means it is loose on the shaft and could create noise with your dehumidifier. This can be fixed by a simple tightening.

To Gain access to the blower wheel, and unplug the system, and try spinning the wheel with your hand. 

If you notice it is stuck anywhere, is not turning freely, or is rubbing and making scuffing sounds, the blower wheel may need to be replaced

8. Check & Replace The Fan Blade

While the system is unplugged, and with access to the fan blade, try moving it with your hand. 

Check whether the fan is rubbing against anything, like the casing or other parts. You can also check the casing if there are scuff marks to indicate if the fan is scraping anything. 

If the fan is not turning freely, it needs to be replaced.

Also, check if the fan wiggles. If it’s wobbly, then it is loose on the shaft and requires tightening.

9. Check the Fan Motor

With the dehumidifier unplugged and the fan motor exposed, first, check the fan blade. 

If that is spinning freely, then move to the next step and use a multimeter on the fan motor to check if the motor is receiving power. 

If the fan isn’t working, but the motor is getting power, it is likely the motor is defective.

If the fan motor is receiving power but is not working properly, it will need to be replaced.

10. Check the Compressor

This component is a key indicator of if your dehumidifier is working or not, as a faulty or worn-down compressor can cause a lot of abnormal and loud sounds.

However, compressors usually last for years even after they wear out and cause abnormal noises, so it is usually not cost-effective to replace them until they break down completely.

How To Quiet A Dehumidifier (FAQ)?

Why Is My Dehumidifier Noisy?

Dehumidifiers do make some amount of noise while in operation, however, if their sound changes or increases, this is a cause for concern. If the parts are damaged, such as a fan motor or there are loose screws, it can cause an increase in unwanted noise. 

They suggest first checking the screws, then moving on to checking individual components for fault.

How Loud Should a Dehumidifier Be?

Depending on your dehumidifier, you should expect a range of 53 dB and 65 dB. Dehumidifiers on the high-noise side will have a range of 60 to 65 dB, while mid-noise dehumidifiers will have a range of 57-60 dB. The quietest range of dehumidifiers won’t be louder than 53 to 57 dB.

To have a better idea of what the dB noise levels actually mean, TLC-Direct compares them to the following level of noise:

  • 60-65 dB: A noise level similar to laughter in the same room.
  • 50-65 dB: A noise level similar to a normal conversation in the same room.
  • 50-60 dB: A noise level similar to a quiet office.

What Are the Side Effects of Living with a Loud Dehumidifier? 

Known side effects of constant noise pollution caused by a loud dehumidifier are an increase in anxiety and stress levels, as well as difficulty sleeping, getting full hours of sleep necessary for proper health, and too much noise to cause a person to wake up early.

There are also physical side effects to loud, constant noise caused by a loud dehumidifier, such as hearing impairment, abnormal loudness perception, warped or distorted hearing, and (most commonly) tinnitus, which is when you hear a ringing in the ears.

All of these side effects show how important it is to soundproof and minimize noise pollution caused by loud dehumidifiers as much as possible.

Do Quiet Dehumidifiers Exist?

Quiet Dehumidifiers do exist, you will just want to look for dehumidifiers that are in the low decibel range, and you can harness a few handy tricks to make your dehumidifier even quieter, 

Such as:

  • Use the lowest fan speed available. This will lower the overall noise output.
  • Increase the distance between you and the dehumidifier, such as putting it at the other end of a room, or putting it in a different room entirely.

Are Commercial Dehumidifiers Loud?

When it comes to commercial dehumidifiers, always check their dB rating to know what kind of noise level you’re signing up for, and make sure you have a plan to deal with the extra levels of noise.

Residential, or small-scale, dehumidifiers are quieter than commercial and industrial dehumidifiers, and commercial humidifiers are usually considered too loud to be out in the open. 

That is why they are oftentimes placed in areas where sound isn’t a concern, such as a warehouse.

Because commercial dehumidifiers remove more moisture out of the air than residential dehumidifiers, comparatively, commercial dehumidifiers remove 160 pints out of the air after 24 hours, while residential dehumidifiers only remove 70 pints, commercial dehumidifiers are going to need more power, causing them to be louder.

Not all commercial dehumidifiers are built like this – some are designed to be heavy-duty and long-lasting, only removing 50 pints from the air after 24 hours but also having a much longer lifespan.

It is always good to check your dehumidifier’s specifications to see its square footage and pint removal rating to ensure it will cover the area you need.

Conclusion – How Can I Make My Dehumidifier Quieter?

Dehumidifiers are going to come with some amount of noise due to their construction and how they run. 

However, as we have looked in this article, there are ways to reduce it, such as ensuring all of the parts are working properly, the dehumidifiers are sitting level, and employing tricks such as putting the 

Dehumidifier on a carpet to muffle the sound.

Looking For Dehumidifer Guides?

If you’re looking for more dehumidifier resources, consider checking out our other post on Dehumidifiers.

irene mills author of freshairdevices


Irene Batres is eager to help others create an indoor allergen-free home. She has years of experience testing out air purifiers, dehumidifiers, and other products designed to help with indoor air quality. Learn more about me.