Best Diffuser Humidifiers of 2022 – Buyer’s Guide

| Last Updated: July 15, 2021

When you have so many options to choose from, regardless of the product you are buying, cherry picking the best one can be a difficult task. This also applies to humidifiers. Humidifiers come in all shapes and sizes, and they use different types of technologies to get the job done.

To help you pick the best unit, we’ve reviewed some of the best diffuser humidifiers in the following. We will take a look into what features to look for and what makes a certain product the best!

Comparison of the Best Diffuser Humidifiers

  • Runner up on our list of best diffuser humidifier
  • It has a large water capacity; approximately 1500ml
  • The device can cover an area of 350 square feet in terms of humidity and 450 square feet in terms of aromatherapy.
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  • Best for the money
  • It features different LED lights that help create a relaxing atmosphere.
  • It has a water capacity of 100ml, making it ideal for small to medium rooms
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  • It does not make much noise
  • The device has 550ml water capacity.
  • It has various time settings that you can set to your preference
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Characteristics of Our Favorite Models

Each diffuser humidifier is made differently. However, these are some characteristics that you will find in every great diffuser humidifier.

Water Capacity

High water capacity is a good feature to look out for when buying a diffuser humidifier. The larger the capacity of the device, the more water, and oil it can accommodate. This means that you will have to refill the device less often. Moreover, you will be free from the task of constantly checking up on the device.

Noise output

Another important feature to consider is the noise output. How much noise does your device make? Is it making too much noise? Does it distract you from concentrating or relaxing? If yes, then that’s no good. Ideally, a device with little or no output is preferred as it helps you relax completely.

InnoGear Diffuser Humidifier

Ease of Use

It is important that the device you pick is easy to use. This can involve many different functions. For example, does the device have adjustable settings? Does it have a humidity level indicator? Does it feature an automatic turn off the system? Such functions make operating the device much easier and therefore, are preferred in any device.

Area Covered

When we talk about diffuser humidifiers, we cannot leave out the area that they cover. This is one main feature that you should look out for. The more area a diffuser humidifier covers, the more suitable it will be.

Review of the Best Diffuser Humidifiers

Now that we have gotten everything else out of the way, let’s get down to business. In this section, we will review five of the best diffuser humidifiers of 2019. We shall look into what features they have and what are the pros and cons of the device in discussion.

Best Overall

Exqline Diffuser Humidifier

1500ml Aroma Essential Oil Diffuser Large - Exqline Diffuser for Large Room, Large Aromatherapy Diffuser/Humidifier, Unique Diffusers for Essential Oils(White)


Decibel Level: 35 dB

Coverage Area: 450 sq ft.

Tank Size: 0.5 gallons

Dimensions: 5.7 x 5.7 x 9.5 inches

Weight: 3 pounds

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The Exqline Diffuser Humidifier has a variety of features which make it a favorite among users. The first of all is its adjustable vapor setting. The device has a 270-degree knob that can be rotated to set the humidity level. This is an easy way to select exactly how much vapor content you want in the air.

The second is the whisper quite function. The device produces next to no noise when it functions. This is a major plus point as the device can be used anywhere around the house. Its whisper quiet function will prevent it from disturbing or distracting you.

Moreover, the device has a large water capacity. It can hold 1500ml in its reservoir which roughly measures up to half a gallon. This is the largest capacity among top diffuser humidifiers. When set on the appropriate setting, it can work for up to 20 hours continuously. When it comes to area coverage, this diffuser humidifier can cover up to 325 square feet of area in terms of humidity. Meanwhile, in terms of aromatherapy, it can cover a bit more than that; approximately up to 450 square feet.

Though the device does not have a very sleek or modern design, it makes up for that with its light settings. The device is equipped with 7 different colored LED lights. These lights can be adjusted to your preference. You can also select the dimness or brightness of the device and match it to the setting of your room or office.

Bottom Line

This device is no doubt a great choice for a diffuser humidifier given that it lacks a timer and shut off function. However, this doesn’t affect the performance of the device in any way, and despite the absence of this feature, the diffuser humidifier works like a charm!


Has a large water capacity

Comes with adjustable humidity settings

Makes next to noise when it functions


Does not have an automatic timer and shut off function

Best for the Money

InnoGear MT-039 Diffuser Humidifier

InnoGear Essential Oil Diffuser, Upgraded Diffusers for Essential Oils Aromatherapy Diffuser Cool Mist Humidifier with 7 Colors LED Lights 2 Mist Mode Waterless Auto Off for Home Office Room, White


Decibel Level: N/A

Coverage Area: 150 sq ft.

Tank Size: 0.026 gallons

Dimensions: 3.94 x 5.51 x 3.94 inches

Weight: N/A

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This small yet effective device is amongst the best diffuser humidifiers, and there is a good reason for that too. With a water capacity of 100ml, this device meets the standards of a medium-large coverage diffuser humidifier. The device has two settings for vapor discharge.

When the device is set on the continuous, it will function for 3 hours. On the other hand, when it is set on the intermittent setting, it works with an interval of 30 seconds. When it is set on that setting, the device will work continuously for 6 hours.

The device has an automatic timer as well. It will shut down the device when all the water from the device has been evaporated. Though the device does produce some noise, it is mostly white noise. The sound that the device produces is around 30-35 dB. This type of noise does not disturb or cause a distraction at all. You can also play a little with the display settings as the device is equipped with 7 colored LED lights.

This diffuser can cover most small to medium rooms. Furthermore, it can be utilized in many settings. These settings can include offices, nurseries, bedrooms and even bathrooms.

Bottom Line

The InnoGear diffuser humidifier is a great option if you’re looking for an affordable diffuser humidifier. It is not bulky as well. It can be easily be placed anywhere in the room, and it will look the part!


Equipped with adjustable settings

Blends in with the room décor and is the perfect size

Does not make a lot of noise when functioning

Has a considerably good water capacity and is easy to use and maintain


There may be some leakage when the device is filled to the maximum limit

PuraSense Ultrasonic Diffuser Humidifier

PuraSense Ultrasonic Aromatherapy Essential Oil Diffuser, 550ml Cool Mist Humidifier with Color LED Lights Changing and Waterless Auto Shut-off for Office Home Bedroom Living Room Study Yoga Spa


Decibel Level: N/A

Coverage Area: N/A

Tank Size: 0.15 gallons

Dimensions: 6.6 x 5.9 inches

Weight: 1.3 pounds

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This diffuser humidifier has a very different and contemporary design. At first glance, it will look nothing like a diffuser humidifier at all. In fact, the chic and classy design helps it to blend right into the room as a decoration piece. The exterior of this device has a wood grain finish which only adds to its aesthetic value.

This little device has a surprisingly large water capacity of 550ml which allows it to function for a total of 10 hours when filled up to the maximum capacity. The device also has four different time settings as well. The settings range from 1 hour, 3 hours, 6 hours and continuous.

The continuous setting will allow the device to run until the water runs out. However, when the water does run out, the device will activate the auto shut off feature. This feature automatically turns off the device exactly 5 seconds after all the water has been evaporated, making sure no harm comes to it.

This device also works very quietly like all the devices mentioned before. Of course, this can be counted as a very big advantage as the quietness of the device can help elevate the relaxing experience.

Not only that but you can also engage in various different activities such as watching TV or reading without being disturbed. The device also has the option of changing LED lights. There are 7 colors in total that can be set to your preferred taste. You can also choose to fix a certain color or let the colors change in a set cycle.

Bottom Line

Overall, this device is a good pick. It has all the options that a good diffuser humidifier should have and to top it all of; it is very fancy looking.


LED light function adds to the aesthetics of the device

Does not need to be looked after constantly as it has a good water capacity

Design is very nice, making it a good addition for bedrooms


Does not have an intermittent mist function

URPOWER MH-401 Cool Mist Humidifier

URPOWER Humidifiers, Updated 4L Cool Mist Humidifier with Sleep Mode, Whisper-Quiet Operation Ultrasonic Humidifier -Waterless Auto Shut-Off with 3 Mist Level Humidifiers for Bedroom Babyroom Office


Decibel Level: N/A

Coverage Area: N/A

Tank Size: 1.06 gallons

Dimensions: 10.07 x 9.1 x 9.64 inches

Weight: 3 pounds

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The URPOWER Cool Mist Humidifier is proof that great things come in small packages. It has a sleek design and is visually appealing. The device is designed in such a way that it will fit right into the room décor without a problem. It is equipped with 7 LED lights, each of a different color. The brightness of the lights is adjustable and also has a night light option.

The water capacity of this diffuser humidifier is 100ml. It holds water that is blended with essential oil. Since the device can hold up to 100ml of water, it means that you do not have to worry about constantly refilling it. The device has two mist settings; one is intermittent in which the mist is circulated through the air sporadically.

When the device is filled up to 100ml, and the device is set to this mode, it will function for 6 hours. The other is the continuous setting in which the mist is circulated constantly, and in this setting, the device will function for 3 hours.

Moreover, the device works silently so that it does not distract or disturb you. It also does not require any type of filter. It also has an auto turn off feature which enables the device to shut down after all the water has been used. Furthermore, the device only needs to be cleaned once a week and does not require much attention.

Bottom Line

If you’re looking for something small yet efficient, then the URPOWER diffuser humidifier is the one for you. Not only does it come with a plethora of features, but it is also aesthetically pleasing as well.


Functions without making noise

Can cover an area of 215 square feet

Two mist settings to choose from allow you to set the desired humidity level

Designed in a visually pleasing manner, making it easy to place almost anywhere


Prone to spillage when the water tank is at full capacity

What Is Diffuser Humidifier and What is it Used For?

Usually, diffusers and humidifiers are used as two separate devices. Diffusers are used, quite literally, to diffuse substances in the air. Most commonly, they are used to diffuse essential oils. Essential oils are pleasant smelling, and each has a different property, so they benefit you in some way or another.

Humidifiers, on the other hand, add moisture content to the air. This helps to improve dry conditions. They can aid in treating conditions like dry skin, irritation and even some symptoms caused by the common cold. Basically, it helps with problems that occur in dry conditions.

However, what if you want to take advantage of both? Buying both a diffuser and humidifier hardly seem like a feasible solution. In this case, we have something that we refer to as a diffuser humidifier. These are a two-in-one solution that not only humidify the air but also help in diffusing essential oils in the atmosphere.

There are different types of diffuser humidifiers. In some, you can add the essential oils directly, and in others, you will find a different compartment for that purpose. Regardless, the end result will provide you with pleasant smelling air with good moisture content.

Aspects to Consider Before Buying

With any device, there are some factors you definitely must look into. For diffuser dehumidifiers, it’ll be beneficial for you if you check look at the following aspects before finalizing your purchase.


All the devices mentioned in this review use ultrasonic technology. Such models are better than heat-based diffuser humidifiers as they last longer and the essential oils retain all their benefits. They also use less energy as they do not require any heat at all. Instead, they use cool mist which is less harsh on you and your surroundings. This includes pets, plants, and furniture.

PuraSense Ultrasonic Aromatherapy Essential Oil Diffuser

Area Being Covered

It’s important to note that most devices mentioned in this review are small and more compact. Therefore, the room capacity that they cover is defined accordingly. It is possible that these devices may not be as effective in larger rooms than they are in smaller or medium-sized rooms.

Cleaning and Maintenance

Since diffusers and humidifiers are used frequently and the main process used is evaporation, the devices can accumulate residue. So, if you want your device to work at an optimal level, they need to be cleaned and maintained at least once a week.


The five products discussed in this review all are very efficient and effective. Though these five units have their pros and cons, the good mostly outweighs the bad. Since each device is different, you can pick and one that is best suited to your needs. As long as you keep in mind the pointers that we suggest remembering, you should be good to go!

My name is Bob Wells and I am a retired HVAC tech from Washington state. I am currently retired and no longer do much with HVAC, however, I feel like I have a lot of knowledge in the subject and I wanted to create a website where I could talk about what I've learned and help upcoming HVAC techs. Find more info about me and HVAC Training 101.