6 Powerful Filterless Humidifiers — Bring Health to Your Home Without Any Fuss!

Last updatedLast updated: October 25, 2021
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As technology continues to advance, different manufacturers keep inventing different devices aimed towards making our lives easier. One of those devices includes a filterless humidifier, which apart from helping to boost the moisture in a building, has a very remarkable advantage. While traditional humidifiers can offer lots of benefits to your home and health in many ways, they need constant maintenance to ensure they’re always in tip-top condition, which is quite tricky, as it requires cleaning the filter regularly and also buying replacement filters at regular intervals. With the best filterless humidifier, however, you can avoid the stress that typically comes along with traditional humidifiers.

For many years, a lot of people were put off buying a humidifier because of the continuing cost of replacing filters. Fortunately, the invention of filterless humidifiers is now helping to attract more people to this appliance. If you’re in search of the perfect filterless humidifier for your home, this guide has got you covered. We have compiled a list of the top six filterless humidifiers on the market right now, and in our selection, we took a couple of essential criteria such as mist type, tank capacity, covering area, and sound level, into consideration.

Like we noted already, this article has been completely planned to be your guiding light as you shop for the right filterless humidifier. To aid your buying decision, we have included a well-crafted table below, comprehensive reviews of our top six filterless humidifiers, and a buying guide in which you will find numerous handy buying tips. Apart from the tips, we have also included a section where you will find the answers to several questions usually faced by buyers.

Top 6 Filterless Humidifiers Review 2022

  • Mist type: cool
  • Water tank capacity: 6 L.
  • Mist time: up to 50 hours
  • Coverage area: up to 400 sq. ft.
  • Sound level: not specified
  • Warranty: 2-year limited; lifetime hassle-free replacement

Other features: essential oil tray; auto shut-off; no filters needed

If you are looking for a device that can cover a 400-square foot area but unwilling to part with an exorbitant sum of money, then you have to take a look at the Everlasting Comfort Ultrasonic Humidifier. This unit comes with a six-liter water tank capacity and an essential oil spray, which allows aromatherapy for stress-free and endurable winters. Besides, the water tank is capable of lasting up to 50 hours continuously depending on the setting and flow of the device.

Although the device’s setting depends mainly on the user’s customization, it will ensure your room remains around the normal humidity level. The unit boasts a 360-degree nozzle with a completely adjustable and functional knob to control the humidity level. The device also prevents the growth of mold and bacteria despite being filterless.

This device possesses several great features, but that is not to say it doesn’t have some shortcomings. There are some moving parts and tight spaces that can make scrub cleaning difficult for you. Not only that, but some reports note that leaks are a common occurrence with this model, so we recommend you to place it in a place where a leak wouldn’t be detrimental.

What makes it stand out?

  • Auto shut-off function
  • Quiet operation
  • Long runtime
  • LED nightlight
  • Allows essential oils

Which disadvantages must you keep in mind?

  • Difficult to clean
  • Leaks are common
RELATED: 9 Top Humidifiers to Ease Asthma Symptoms — Reviews and Buying Guide

Levoit LV600HHBest Filterless Humidifier for Townhouse

  • Mist type: cool and warm
  • Water tank capacity: 6 L.
  • Mist time: up to 36 hours
  • Coverage area: up to 753 sq. ft.
  • Sound level: not specified
  • Warranty: 1-year limited (can be extended to a 2-year period with an order number from Amazon)

Other features: comes with three aroma pads, a cleaning brush, and a remote control

Manufactured by a well-known company with a reasonably good reputation, the Levoit LV600HH Ultrasonic is a brilliant unit. Apart from featuring warm and cool mist at three different levels, this device also boasts a humidity sensor, which allows you to set your exact humidity level, and the humidifier will automatically maintain it. Remote control and an easy-to-use sensitive touch panel are common attributes of the best humidifiers, and this model lacks none of those attributes.

Featuring a large six-liter tank capacity this model can run for 36 hours continuously and is capable of covering up to 753 square feet area. The machine has a super quiet operation and is engineered to prevent leakages. If aromatherapy is something you want, you can add a couple of drops of your favorite essential oil into the aroma box as the unit can also be transformed into an aroma diffuser. However, keep in mind that this option might not be ideal for a baby.

This machine feels clean, premium, and sturdy. It has a transparent tank which lets you know the level of the remaining water. However, the display on the device, despite how useful it is, is too bright for nighttime and there is no button to adjust it.

Why is it special?

  • Can be used as an aroma diffuser
  • Convenient remote control
  • Very quiet operation
  • Auto shut off function
  • Large tank capacity

What are the flaws?

  • The display is too bright for nighttime
  • May be bulky for small homes
RELATED: 6 Best Humidifiers for People with Sinus Problems — Say Goodbye to Illnesses!

MistAire Silver Ultrasonic Cool Mist HumidifierBest Filterless Cool Mist Humidifier

  • Mist type: cool
  • Water tank capacity: 5 L.
  • Mist time: up to 25 hours (on low speed)
  • Coverage area: up to 250 sq. ft.
  • Sound level: 32 dBA
  • Warranty: 5-year limited

Other features: a 360-degree nozzle; auto shut-off; cleaning brush included

The MistAire Ultrasonic Mist Humidifier is a great option for dry skin sufferers. While it sports a relatively simple design, the unit features a decent capacity which allows it to moisten the air for up to 25 hours. Although the 1.5-liter water capacity seems small, in fact, it is not, and you can use it continuously without needing to refill every now and again. Besides, the unit has a quiet operation, which allows you to sleep peacefully at night without being disturbed by the humidifier.

Furthermore, this device from MistAir is serving an area of up to 250 square feet, which makes it suitable for master bedrooms and larger living rooms. If you’re looking for a simple device with little fuss, then this MistAire might be an excellent option for you. It is backed by a five-year limited warranty which speaks volume about its durability. There is also a cleaning brush included so that there won’t be any accumulation of mold, which is a common occurrence with filterless humidifiers.

While this model doesn’t come with many bells and whistles, it features a night light, making it an excellent addition to any child’s room, particularly during the flu and cold season. In addition to that, it has two settings of humidity to meet your needs. It also comes with an automatic shut-off function, which means you can plug it in for the night and not have to worry since the machine will shut off automatically when the water dries off. Besides, this keeps you safe without needing to worry about accidents or overheating.

What makes it stand out?

  • Decent runtime for a compact unit
  • Quiet operation
  • Nightlife feature for calm light
  • Features an auto shut-off function

Which disadvantages must you keep in mind?

  • No button to turn the nightlight off
  • Can’t be used with essential oils
RELATED: 5 Greatest Humidifiers to Save Your Dry Skin and Maintain Your Family’s Health

OPOLAR Digital HumidifierMost Stylish

  • Mist type: cool
  • Water tank capacity: 3 L.
  • Mist time: up to 26 hours (on low speed)
  • Coverage area: up to 500 sq. ft.
  • Sound level: 35 dBA
  • Warranty: not specified

Other features: timer mode; sleep mode; LED display

The Opolar Digital Humidifier is an excellent option for people that want firm controls of humidity levels. Besides being an excellent option for moisturizing the entire house, another reason why we love it is that it comes with a built-in humidity controller. You can effortlessly figure out the humidity level in your home, and adjust the settings of the device accordingly. This model, apart from being our Editor’s pick, is also widely considered as the best filterless humidifier for babies.

The device boasts a sizeable three-liter capacity tank, which allows it to run up to 26 hours before needing a refill. It features three different mist settings to suit your comfort level, and the included rotating twin nozzle allows for mist dispersion. Amazingly, this device is capable of covering 300 to 500 square feet, which is the size of an average apartment. It also has an auto shut-off feature which prevents overheating by automatically shutting the machine off when the water runs dry. In addition to that, there is a night mode feature which keeps the device running without causing extreme light and sound for peaceful sleep.

The Opolar Cool Mist Humidifier also sports a very sleek design, which makes it a perfect option as regards home décor. Besides it features an LED digital display, which makes this an easy-to-use and enjoyable vaporizer. The humidifier functions at a very low noise level which is perfect for homes with children. The waterless auto-shutoff feature, on the other hand, improves the durability and safety of the machine. The device, however, has a very disturbing sound which beeps continuously when the water dries up.

What are our favorite features?

  • Incorporates humidity controller
  • Very quiet operation
  • Three different mist settings
  • Fashionable design and color
  • LED lights can be switched off

What could be better?

  • Annoying beeping sound when it runs out of water
  • The warranty conditions are unclear
RELATED: 5 Most Effective Humidifiers for Cough — Forget About Restless Nights!
  • Mist type: cool
  • Water tank capacity: 2 L.
  • Mist time: up to 16 hours
  • Coverage area: up to 360 sq. ft.
  • Sound level: 36 dB max.
  • Warranty: 1-year limited

Other features: 1/3/6-hour timer; optional night light

Voted as one of the best filterless humidifiers on the market, the Anypro Ultrasonic Cool Mist Humidifier boasts of several useful features. First of all, it is made from high-quality, anti-mold materials which give it several health benefits that you won’t find on many other models. With a compact yet sizeable 2-liter water tank, the machine can run continuously for up to 16 hours. In addition to that, it comes with a 360-degree rotating mist spray which lets you control the mist dispersal. The steady flow of mist provided by this device leaves no condensation whatsoever and is apt for medium to large-sized rooms.

The Anypro humidifier was made in the USA, and it has a durable build which reduces the likelihood of breakage or leakage. For people who want to keep the machine running throughout the night, the Anypro Mist Humidifier provides peace of mind as it is safe and super quiet. The incorporated automatic shut off feature comes into effect when the machine runs out of the water, thereby reducing the possibility of overheating or accidents.

The materials used in the manufacturing of the device help kill off the growth of mold. This unit comes with no filter, but it comes with a cleaning brush to allow for easy cleaning. While this model is equipped with all the key features you would expect to find in a premium-quality device, it’s not an aromatherapy diffuser. So, if this is what you’re looking for, then you might need to reconsider your options.

What are our favorite features?

  • Compact and powerful
  • Long runtime
  • 360-degrees adjustable spray
  • Antibacterial and anti-mold materials

What could be better?

  • No aromatherapy function
  • Doesn’t have an internal hydrometer
  • No LCD display

Rosewill RHHD-14002 Budget Pick

  • Mist type: cool
  • Water tank capacity: 5 L.
  • Mist time: up to 16 hours
  • Coverage area: up to 250 sq. ft.
  • Sound level: not specified
  • Warranty: 1-year limited

Other features: built-in soft-glow LED nightlight; auto shut-off when the water tank is empty

No list of the best humidifiers is ever complete without the Rosewill RHHD-14002 Humidifier. It is perfect for people suffering from different sorts of breathing problems, such as sinus congestion. Featuring a five-liter tank, it is capable of holding sufficient water for uninterrupted operation. It also features an adjustable rotating 360-degree nozzle, which enables you to control the mist direction for even dispersal. Besides, the device can serve you while being placed at any angle due to the rotating nozzle.

Furthermore, the humidifier features an auto-shut function that turns it off automatically when the water dries off. This way, it’ll keep the humidifier from overheating its sensitive component out. The device comes with additional vital features such as an inbuilt soft glow LED night light and adjustable misty setting. They enable you to have control over the amount of mist the machine is dispersing. Besides, it features an ultrasonic technology which gives it a quiet operation.

However, nothing is ever made to be flawless, and this unit has its disadvantages too. One downside is that its super bright light has no switch off mode, which makes it uncomfortable for people who can’t sleep with light. In addition to that, it requires being cleaned regularly if you don’t want to risk the growth of mold and bacteria.

Why is it special?

  • Large water capacity
  • Humidifies room up to 250 square feet
  • Stylish design
  • Easy to use

What are the flaws?

  • No button to turn off its bright light
  • Requires regular cleaning

Things to Consider

After reading the in-detail reviews, you also need to equip yourself with enough knowledge about filterless humidifiers, which is why we have included this handy section.

What advantages do filterless models have?

Filterless humidifiers will offer you lots of benefits. Apart from the regular functions provided by conventional humidifiers, filterless humidifiers offer several additional benefits.

Less noise: Filterless humidifiers usually come with no fan, which results in very quiet operation. Conventional humidifiers, on the other hand, produce a lot of noise and might consequentially disturb the whole family.


Less expenditure: Of course, filterless humidifiers come with no filter, which leads to less cost of maintenance as you don’t need to be buying filters every now and again. Filters require careful maintenance and have to be frequently replaced. Buying a filterless humidifier will get rid of such additional expenses.

The health factor: The overall health of your family is bound to see an improvement when you install filterless humidifiers in your home. These devices come with antibacterial materials which prevent all sorts of bacteria from growing. Besides, it will give your skin a healthy glow, which is caused by breathing moisturized air.

Features to consider while choosing a humidifier

Nowadays, most manufacturers produce filterless models because of their increasing demand. Consequently, the market has been saturated with many models of these humidifiers, thereby making it difficult for buyers to choose the right one. To make sure you buy the best model, there are crucial features to take into consideration.

Mist type

Filterless-Humidifier 2 e1

There are basically two categories of humidifiers: cool mist and warm mist. Although both cool and warm moisture humidifiers are built to purify the atmosphere and raise the humidity levels in a place, the way they operate is different. Warm mist models are built to produce a warm vapor from heated water, cool mist models diffuse cold unheated water into the atmosphere. You should be able to determine which type is suitable for you depending on your needs. Warm mist is regarded to be somewhat more antibacterial due to the pre-heating process which kills harmful bacteria. As such units don’t include any filter, the warm mist models may come in handy in houses with babies and small kids.

Water tank capacity

This factor should always be taken into consideration when shopping for a humidifier. How effectively the unit will be in moisturizing your home depends on the unit’s capacity. You also have to know the size of the room where the unit will be used before making your decision.

It is, however, recommended to get a model that features a large water tank like the Levoit LV600HH since this will allow it to operate for more extended hours. This way, it disperses adequately to keep the air humid. Also, avoid purchasing a large model that has a misting capacity above the size of your room. This is due to the fact that excess humidity can accelerate the growth of bacteria, mold and other dangerous effects.


A humidistat is a very vital part of a humidifier because it keeps the moisture level from getting above a particular point. Make sure you opt for a humidifier that comes with a humidistat since units without one are capable of producing extreme amounts of humidity which is also bad for your health.

If your unit comes with no humidistat, you need to think about buying a hygrometer separately.

Covering area

Humidifiers are generally designed to cover a particular area. The smallest models are meant for desktop use, while the biggest ones are capable of humidifying a whole house. Bedroom humidifiers fall somewhere in-between. Excessive humidifying can result in mold, so you don’t want to overdo it. Avoid this by picking a model appropriate for your needs, depending on the size of the place you’re looking to humidify.

Sound level

Every humidifier makes some kind of noise, regardless of the model or type. If you are using a bedroom humidifier, then you need it to be as quiet as possible so that it does not disturb your sleep. In general, the larger the filterless humidifier, the noisier it is. In an ideal world, your humidifier functions as some kind of white noise.

If you are incredibly sound-sensitive, find videos online which show how the humidifier you are looking to buy is operating, and listen to determine if its noise level is alright for you.


It is almost embarrassing nowadays to buy anything that doesn’t come with a warranty. How are you going to measure the long-term durability of something that comes with no warranty from the manufacturer? While a warranty doesn’t totally mean a product will last for a lot of years, it still shows the level of confidence its manufacturer has in it, which is a good initial sign.

Extra features

The more the features on a humidifier, the higher its efficiency will be. A model with an adjustable mist setting will allow you to modify the amount of moistness it’ll disperse into the atmosphere. Like this, it keeps your home from becoming excessively moisturized as it can cause harmful effects.

Another excellent feature is the auto shut-off function and timer settings. The auto shut-off enables you to control the duration at which the unit will operate before shutting down. Besides, you don’t have to be bothered if the water dries up since you can turn the unit off automatically as soon as the water dries up. Other features you might want to check is an oil diffuser feature and remote control, which also offer more convenience.


Filter-free humidifiers are capable of keeping the air humid and clean simultaneously. The device puts moistness back into the atmosphere – as a traditional humidifier – just that it functions without using a filter. While the air stays clean, the device has no removable filters. Instead of removable filters, the machines utilize antibacterial materials, electrostatic charge technology, and pre-heating (for warm mist models) to keep the air cleaned and send it back into the atmosphere in the form of fog.

It usually gets colder in the night, and as there comes a drop in temperature, the air will get drier, which might ask for a need for a humidifier. A humidifier functions to restore humidity back in your bedroom and it’s totally safe. Some of the benefits of using a humidifier in your bedroom include improved sleep, reduced risks of infections, softer skin, healthier houseplants, and faster healing times. While most models make a particular sound, some are quieter than others, and depending on your budget, you should find a model that is quiet enough for your needs.

Our Verdict

With all things considered, the best product on this list is the Everlasting Comfort Ultrasonic Cool Mist Humidifier, which has won the hearts of many homeowners with its large water tank capacity, longer runtime, and most significantly, its allowance for aromatherapy treatment.

Also coming with a wide range of features, the Levoit LV600HH is our second pick. Like the Everlasting Comfort model, this one also allows for aromatherapy treatment, also providing with warm mist mode and a vast coverage area of up to 753 square feet.

Taking the third spot is the Pure Enrichment MistAire Humidifier which sports elegant, sleek design, has an effective 360-degree rotating nozzle, and can operate for up to 25 hours on just one refill.

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