Best Filterless Humidifier

Humidity is a tricky thing to deal with. As the seasons go by and as summer turns into autumn and then winter, humidity levels tend to drop and rise uncontrollably. This may not seem too bad on paper but the fact that humidity levels have the potential to negatively impact not just our homes and immediate surroundings, but our health as well means that it can pose a serious threat.

From allowing for the festering of mold to aggravating ongoing respiratory issues such as asthma to even causing your lips to crack and bleed, a good household is a household with its humidity at ideal levels. 

Thankfully there is a silver lining to this cloud: humidifiers. These nifty devices can keep humidity levels at their optimal points and won’t cost you an arm or leg to purchase. Better yet, the humidifiers we’re leaning for operate totally without filters.

This means you’ll be able to save on cost in the long run without compromising functionality! Just read on below to check out our take on the best filterless humidifiers in the market right now.

Best Filterless Humidifier of 2020

Vicks Filter-Free Ultrasonic Visible Cool Mist Humidifier

Vicks Filter-Free Ultrasonic Cool Mist Humidifier, Medium Room, 1.2 Gallon Tank-Humidifier for Baby...

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Taking advantage of cutting-edge patented ultrasonic technology, the Vicks Humidifier makes for an excellent product beloved by all across the world. With a solid capacity of 1.2 gallons, the Vicks will be able to continue operating without stopping for well over 32 hours.

At just 4 pounds despite its sizeable dimensions of 1.87 x 9.45 x 13.46 inches, moving this around will be a non-issue as well. Best yet, when in operation, the humidifier is not only efficient but is almost totally quiet – you won’t even notice it in the quietest of rooms. It also features a very wide opening at its lid which will make cleaning quick and easy. On its filter-free function, in its place is instead ultrasonic technology meaning you’ll never need to replace its filters.

We recommend this solid product if you have either a small or medium-sized room spanning from 100 to 400 feet.

LEVOIT Humidifiers for Bedroom, 4L Ultrasonic Cool Mist Humidifier

LEVOIT 4L Humidifiers for Bedroom Large Room & Essential Oil Diffuser, Quiet Cool Mist for Home,...

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Coming in either gray or blue, the Levoit humidifier provides an excellent product for those looking for something to accommodate larger interiors. With its 1.06 gallon water capacity, it will be able to continually run for up to 40 hours on low and 10 hours on high settings.

Utilizing cutting edge ultrasonic technology to atomize water in the air into mist, it’ll humidify any large room (285 to 375 square feet) without a hitch. The neatest thing though is how it operates at near-silence and can be combined with essential oils in its dedicated aroma compartment to infuse the surrounding environment with your fragrance of choice.

Everlasting Comfort Humidifiers for Bedroom

50-Hour Ultrasonic Cool Mist Humidifiers for Bedroom (6L) - Quiet, Filterless Humidifiers for Large...

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With a 1.6 gallon capacity, you can rest assured that the Evertlasting Comfort humidifier will accommodate even the largest of rooms up to 500 square feet. And even despite covering such a wide area, it’ll last for well over 50 hours without an issue. It may be large, but boy is it quiet.

A whisper in the background, the humidifier operates unnoticed and will automatically switch itself off once it runs out of water. It also doesn’t use filters due to its ultrasonic technology and with its essential oil tray, you can play around with aromas and fragrances to concoct the smell of your dreams.

Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier

Pure Enrichment® MistAire™ Ultrasonic Cool Mist Humidifier - Quiet Air Humidifier for Bedroom,...

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If you’re looking for a great product that’s ideal for smaller environments, this 1.5 liter humidifier will be just right for you. Capable of humidifying medium-sized areas, you’ll get a smooth running device that’ll continually work for up to 16 hours that comes in two speed settings which you can play around with to your preference.

Not only is it totally filter-less, it also comes with an in-built night light that can be switched on and off, a fine addition to help the young sleep at night. On its top, you’ll also notice a 360-degree nozzle that’ll allow you to direct the mist away from certain areas that should not be moisturized such as places with electrical wiring and parchment.

Miroco Cool Mist Humidifier, 26dB Ultra Quiet, 6L Ultrasonic Humidifiers

The Miroco Humidifier may be one of the quietest we’ve come across. Operating at just 26dB, even the most sensitive and light of sleepers won’t notice this running throughout the night. With a 1.6 gallon capacity that’ll last anywhere between 20 to 60 hours depending on which setting you pick; you’ll be able to easily moisture rooms from as small as 215 to as large as 430 square feet.

Cleaning the device is also made easy with its 90mm water inlet that minimizes any risk of spillage while its night light provides a comforting glow that’ll lull any child to sleep. Finally, when the time comes to refill the water, the Miroco will inform you by shining bright red which we think is a neat little feature that prevents overheating.

Cool Mist Humidifier, Magictec 2.5L Bedroom Essential Humidifier Diffuser

Cool Mist Humidifier, Magictec 2.5L Bedroom Essential Humidifier Diffuser, Baby Humidifier with...

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At just 0.66 gallons, the Magictec may be small but boy is it mighty. Able to last for a period of up to 24 hours before needing to be refilled, this discrete humidifier will pump out moisture quietly at a little under 30dB and is ideal for any medium-sized room such as a bedroom or even a living room.

Its output settings are adjustable too as you’ll be able to control the amount of mist flowing out via its little dial and when it comes to overheating, it’ll automatically shut itself off once water runs low. Directing the flow of mist away from things that should be avoided like precious books and pets is made easy with its 360-degree mist nozzle too.

Examining the build of this product also reveals premium quality. Crafted out of durable ABS, this is guaranteed to last for years on end assuming it’s taken care of properly. 

Honeywell HUL535B Cool Mist Humidifier

Honeywell HUL535B Filter-Free Cool Mist Humidifier, Black – Cool Mist Humidifier for Bedroom, Home...

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Able to operate for up to a full 24 hours without needing refilling, Honeywell’s humidifier offers a highly portable and compact device that packs quite a punch. Capable of accommodating medium-sized rooms with its decent water capacity, it’ll provide for ideal breathing conditions within moments once activated.

Overheating is a non-issue as it will shut-off automatically once its water tank runs out and with its directional outlet for produced mist and variable output settings, you shouldn’t find yourself needing for more.

Humidifiers for Bedroom, TaoTronics Cool Mist Humidifiers for Babies

With three colors to choose from – black, white, blue – this futuristic looking humidifier by TaoTronics makes an ideal product for nurseries. Not only is it highly compact and unobtrusive to the idea, it operates at a quiet noise level of just under 32dB.

This coupled with its FCC-certification and the fact that it is constructed carefully without any BPA materials makes it totally safe for even the youngest of babies. Controlling the output of the humidifier based on your child’s preference is simple too with its dial knob and directing its mist output with its 360 degree nozzle goes without saying, is just as straightforward.

Cleaning isn’t a hassle as well due to its small size so if you’re looking to add some moisture to your household, the Taotronics has got you covered.

GENIANI Top Fill Cool Mist Humidifiers for Bedroom & Essential Oil Diffuser

Top Fill Humidifier with Essential Oil Diffuser 4L for Home, Baby, Bedroom, Large Room & Indoor...

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Offering a 2-in-1 device that doubles as both a humidifier and diffuser at the same time, Geniani’s Mist Humidifier with its 1.06 gallon capacity allows you to easily maintain optimal humidity levels in any given room while fusing the air with your favorite scents.

Its output is also easily controllable with its three speed settings and refilling this device couldn’t be more intuitive. Just pour water into its small inlet on its top as you would a bottle of water! And when it goes into operation, it may not be the quietest device out there at its 38dB of noise but trust us, this is comparable to a ticking clock, so you’ll really have to pay attention to even notice its presence.

It also features a smart mode that calculates the ideal levels of humidity in any given room by itself so you can just turn it on and let it do its thing.

Cool Mist Humidifier – Humidifier for Bedroom, Quiet Mist Humidifier

Humidifiers for Bedroom, Optional 7-Color Night Light Cool Mist Humidifiers for Baby, 2L Quiet...

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Coming in the shape of a cute little egg, UCAREAIR’s Humidifier makes the ideal pick for any child’s room or nursery. No louder than a whisper in the cool of night at just 32dB of noise, with a 0.5 gallon tank, it’ll provide more than adequate humidity for rooms spanning up to 200 square feet without issue.

Using a one-touch button to set its level of mist is also straightforward. Simply touch and go! And in terms of safety, the device avoids overheating by automatically switching itself off once water levels are low or when the water tank is removed, giving you some peace of mind.

But where UCAREAIR really shines (or glows) is at night. With vivid colors that can cycle between 7 rainbow-like gradients that serve as a soothing and dim night light, any child will appreciate such a relaxing sight during dreamless, sleepless nights.


A Buyer’s Guide to Filterless Humidifiers



Not all filters are designed to accommodate large rooms. The options on our list that hover around a capacity of 1 gallon especially so. If you’re planning on using your humidifier in a large area such as a hall or office corridor, we suggest you look for options that can specifically accommodate for that.

Alternatively, you can also purchase several smaller capacity humidifiers and spread them out appropriately. That being said, if you get a large capacity humidifier, you can always scale it down, but the converse doesn’t not apply.


While most humidifiers are designed to operate at the quietest levels that won’t be noticed even by sharp ears, if you are a super light sleeper or are especially pedantic about any sort of noise, always check the dB numbers before making a purchase. You don’t want your humidifier to be constantly annoying you through the long days!


Nightlights make a fantastic addition for any child or adult suffering from sleeping problems. Calming, relaxing, and soothing to both the mind and eye, if you think you’ll benefit from having a nightlight, humidifiers surprisingly will be your best friend as many come pre-installed with them. Even if you don’t want them, you’ll easily be able to shut it off at any time. It’s a win-win situation really. 


Frequently Asked Questions (FAQs)

Do I need to have an aroma tray?

They are totally optional. If you like certain fragrances and want a room to smell just like it, having an aroma tray will be a blessing to you. Likewise, if you prefer something more unnoticeable and neutral, you’ll be totally fine not using one as well. 

Do I need to use a specific type of water to fill my humidifier?

Absolutely not. You don’t have to worry about carefully preparing boiled water or even purchasing entire packs of drinking water for your humidifier. Using water straight out of your kitchen’s tap will be totally fine for your humidifier in most cases! That being said, depending on where you live, tap water may contain certain chemicals and pollutants which can detract from your humidifier’s efficiency so do check on this first.

How often do I need to change the water?

You should be refilling your humidifier before using it every time, but we get that this can be a little annoying for some. Allowing it to run until it is totally dry is fine to as most devices have automatic shut-down functions that rely on in-built sensors.