The 7 Best Humidifiers Without Filters – (Reviews & Guide)

best humidifiers without filters in baby nurseryWhy would one look for the best humidifiers without filters? After all, so many individuals praise filters – so it seems odd when filterless units become popular.

Well, a device without filters can operate just as amazing as one with filters. Furthermore, not having a filter doesn’t decrease the performance of the device in any way.

Moreover, a humidifier with a filter will require constant maintenance as you’ll have to either wash the filter or replace it. So, if you’d rather skip the additional maintenance part and deal with the humidifier alone, we are here to help you.

Best Humidifiers without Filters Comparison Table

Last update on 2024-05-30 / Affiliate links / Images from Amazon Product Advertising API

Below, you will find reviews of multiple humidifiers that will help you choose a suitable product for your home.

Additionally, you will have a buying guide with useful information so you can look at the best features when making your choice. Let’s get started!

Top 7 Best Humidifiers without Filters Reviews (Updated List)

1. Crane Drop Ultrasonic Cool Mist Humidifier – Best for Medium-Sized Rooms

Crane Ultrasonic Cool Mist Humidifier for Bedroom,...
  • LARGE ROOM HUMIDIFIER: The Crane Drop Ultrasonic Humidifier features an easy-to-clean, detachable tank that holds one gallon of water to humidify bedroom, nursery, or indoor spaces up to 500 square feet for 24 hours
  • ADJUSTABLE HUMIDITY: This air humidifier features variable controls to set optimal humidity levels when used as a plant humidifier, baby humidifier, bedroom humidifier, or as small humidifier for the office
  • SOOTHE SEASONAL ALLERGIES: Add humidity to your dry living spaces and pair with relaxing steam inhalers that help fight cold and flu symptoms all year round and make wellness a priority
  • AUTO-SHUT OFF: Each small humidifier has an automatic shut-off safety feature
  • DROP SHAPE COLLECTION: We offer a collection of air humidifiers, humidifiers for women, men, and kids, and evaporative humidifiers in a range of colors to find the right large or small humidifier for your home, nursery, office, or bedroom

Last update on 2024-05-30 / Affiliate links / Images from Amazon Product Advertising API

Are you looking for a filterless humidifier that will not affect the quality of your sleep? Why not pick this whisper-quiet unit, then?

This product is amazing for those who want to ensure silence in the room while they’re resting. Thanks to that, it’s a great option for light sleepers, babies, or kids.

A feature that takes the spotlight is definitely the 360-degree adjustable mist lid. It will make sure the room gets evenly humidified, so you can enjoy the moisturized environment you require.

If your room is up to 500 square feet large, the humidifier will do a great job at maintaining humidity levels.

It comes with a one-gallon tank that will be a piece of cake to carry from a place to another, all thanks to the easy handle it has at the top.

Due to the spacious tank, the unit can run up to 24 hours, meaning you can go on with your day without worrying that the water levels will decrease immediately.


  • Great for medium-sized rooms
  • Quiet operation
  • The design makes it very easy to clean
  • It can run for a good amount of time without needing to be refilled


  • Mist may start leaking down the sides of the top cone cap



2. GENIANI Ultrasonic Cool Mist Humidifier – Best for Night Use

Last update on 2024-05-30 / Affiliate links / Images from Amazon Product Advertising API

Getting fresh and purified air in your house is quite easy with this humidifier. The product does a great job of evenly moisturizing the designated space while making the entire atmosphere safer.

Being ETL certified, this product conforms to U.S. safety standards. If you’re a light sleeper, then you may fall in love with the unit.

Depending on the amount of light you need in your room while you sleep, this product can meet your requirements. It allows you to either sleep in complete darkness while it’s operating or offer you dim light.

Filling the tank will be a piece of cake too. All you have to do is unscrew the cap and start filling it with water from the sink. This makes sure you will never struggle to refill the 3L water tank.

Moreover, the mist level can be adjusted as well. That being said, you can control how much mist is being released into the atmosphere so you can meet your needs.

The 360-degree mist nozzle will also help you decide where you would like the mist to be released.


  • Even coverage when moisturizing the room
  • It can turn off automatically when it runs out of water
  • Amazing for use during the night
  • Filling the tank will be very easy


  • Some humidifiers will start leaking



3. Crane Adorables Ultrasonic Cool Mist Humidifier – Best for Children Rooms

This is a great option if you have children and need a humidifier for your room. The first noticeable thing about this unit is the design.

With its animal shape, you can rest assured that it will make a great decoration for your child’s room.

You can pick from multiple animal designs to match the room’s theme and the child’s preference. When it comes to the features, being whisper-quiet is another thing to consider.

Especially when it comes to kids, you want them to have a nice, uninterrupted sleep, and this humidifier will help with that while moisturizing the atmosphere.

It’s not only quiet, but it also gives you light options, so the sleep isn’t ruined by the light it generates. And believe it or not but despite the unique design, the tank is easy to clean.

You only have to detach the tank and remove the water level sensor and the cap, and you’ll have access to every corner of it. Thorough cleaning will be ensured this way.


  • Very easy to use
  • The operation is whisper-quiet
  • Allows for proper tank cleaning
  • Has variable mist levels


  • The plastic used in the construction is not the most durable



4. Vicks Filter-Free Ultrasonic Visible Cool Mist Humidifier – Great for Cough and Congestion Relief

Vicks Filter-Free Ultrasonic Humidifier. #1 Brand...
  • VICKS FILTER-FREE COOL MIST HUMIDIFIER: This cool mist humidifier won't need replacement filters, and it's 1.2 gallon tank can give up to 30 hours of soothing mist. Vicks cool mist humidifier is quiet, making it great for your bedroom or baby's nursery
  • VICKS HUMIDIFIERS FOR BABIES, KIDS, ADULTS: Humidifiers diffuse moisture into the air, and many women and men find that a humidifier for the bedroom becomes an essential part of a good nights sleep when the air is dry, in allergy season, or when sick
  • COUGH AND CONGESTION RELIEF: When you or your kid has a cold, it can be difficult to sleep through the night. Humidifiers, vaporizers, and steam inhalers provide temporary relief from coughing and congestion, so your rest won't be as disturbed by coughing fits
  • VICKS VAPORIZERS, HUMIDIFIERS AND STEAM INHALERS: Moisture and humidity offer temporary relief from cough and congestion due to colds or allergies. Vicks line of humidifiers and steam inhalers, help you breathe easier wherever you are, from the bedroom to the office
  • HUMIDIFIERS FOR BEDROOMS, DESKS, TABLES: Our humidifiers and vaporizers help you breathe better wherever you are.

Last update on 2024-05-30 / Affiliate links / Images from Amazon Product Advertising API

Cough and congestion can be pretty annoying, and they will prevent you from having a good night’s sleep. This is why having this humidifier may be a life-changer.

Thanks to the humidifying feature, the unit will relieve these symptoms and make sure you wake up fully rested the next morning. The relief will be temporary, and it can improve the quality of your sleep if you keep it running.

Touted as the best humidifier for cough and congestion, this unit is great for adults and children. Whenever the air is dry, or you have an allergy, the humidifier will prove to be of great help.

You can even enjoy a soothing vapor experience as there is a scent pad door. This will allow you to fit the Vicks VapoPads inside, improving your experience and making the environment even more comfortable to be in.

The tank opening is wide and ensures you can reach every side of the tank to clean it.


  • Great relief for cough and congestion
  • Easy to see the water level through the translucent tank
  • Variable humidity control
  • Easy to clean


  • Deposits may gather inside the unit if you don’t use distilled water



5. Pure Guardian H910BL Ultrasonic Cool Mist Humidifier – Best for Small Rooms

Pure Guardian H910BL Ultrasonic Cool Mist...
  • Cool mist humidifier: the pureguardian h910bl ultrasonic cool mist humidifier guards against dry air in the home and is perfect for those suffering form colds, discomfort and dry skin. Optimize your comfort with soothing glow and high cool mist settings
  • ULTRASONIC TECHNOLOGY: The H910BL disperses a soothing, cool mist into the air and is ultra quiet, making it ideal to have on while you sleep; Silver Clean fights the growth of dirt on the surface of the water tank
  • Great for small rooms: the .21 gallon tank provides up to 14 hours of run time and is perfect for 210 sq. Ft. Rooms; the slender desktop design is perfect for a nursery or desktop features an optional night light, great for kids rooms
  • Additional features: the ultrasonic cool mist humidifier includes a directional mist nozzle, auto shut off when empty, and a low water indicator light illuminates when to refill the tank; no evaporating pads, sticks or filters to clean or replACe
  • Pure guardian: by guardian technologies offers a full range of small appliance based solutions for happier and healthier lives at home, focused on creating powerful, safe and innovative technologies to help facilitate healthier, happier home environments

Last update on 2024-05-30 / Affiliate links / Images from Amazon Product Advertising API

For people who have small rooms and don’t want to overly-moisturize the area, Pure Guardian has just the right product.

This small humidifier is suitable for rooms up to 210 square feet, and it can run for up to 14 hours. The .21-gallon tank will allow this to happen.

This is a cool-mist humidifier, which is amazing if you’re suffering from allergies or colds. The vapors will make it easier for you to breathe and will thus increase your comfort.

More than that, since it produces a cool mist, it also has the ability to cool your room when the temperature gets too hot.

You have the option to use aromatherapy as well. There’s an aromatherapy tray where you can add some drops of essential oil to improve your experience.

This will help you relax while you’re at home after a long, exhausting workday. When the tank gets empty, the auto shut-off feature will ensure the unit stops running for your own safety. It also protects the humidifier this way.


  • It improves your home environment
  • Amazing for allergy or cold relief
  • Safe to use
  • Great for small rooms


  • You can’t adjust the output level



6. Honeywell HUL535B Cool Mist Humidifier –Ultrasonic Humidification Technology

Honeywell HUL535B Filter-Free Cool Mist...
  • COOL MIST HUMIDIFIER – Honeywell Filter-Free Cool Mist Humidifier (HUL535B) helps to ensure proper humidity levels in your home. Indoor humidity levels between 40-60% can help relieve cough and congestion, keep throat/nasal passages hydrated and more.
  • QUICK AND EASY TO USE – This small humidifier features a compact size that makes it ideal for desktops or nightstands in medium-sized rooms. It produces a fine, visible cool mist, has variable settings, a direction mist outlet and can run up to 24 hours.
  • COUGH AND CONGESTION RELIEF – Humidifiers for home can be helpful during cold and flu season, when it’s difficult to sleep with cough and congestion. A humidifier or vaporizer can provide temporary relief by adding necessary moisture to the air.
  • HUMIDIFIERS FOR BEDROOM AND MORE – A cool mist humidifier fits into any room, making it a great choice for your family, even as a kids or baby humidifier. Use when the air is dry, in allergy season, when sick or to maintain optimal indoor humidity levels.
  • A BRAND YOU CAN TRUST – Honeywell has been keeping families comfortable in their homes for over 100 years with our full line of humidifiers, filters and more.

Last update on 2024-05-30 / Affiliate links / Images from Amazon Product Advertising API

If you’re looking for easy filling and cleaning, then this may be the product to turn to. It has a large tank that makes filling and cleaning it a piece of cake.

This way, you will make very little effort to remove all the dirt and debris that accumulates on the surface. A medium-sized room is just ideal for this device.

A directional mist outlet will take care of the humidification process by releasing moisture in every part of the room, leaving nothing untouched.

As such, dry air will be a thing of the past, and your comfort and breathing will be greatly improved. In addition, the unit can run for up to 24 hours, so you will not have to refill the tank constantly.

It will keep running until it eventually runs out of water and shuts off. The auto shut-off feature is amazing in ensuring the humidifier doesn’t damage itself and will also prevent potential accidents.


  • Easy to fill and clean
  • Amazing for medium-sized rooms
  • The tank opening is wide, allowing for proper cleaning
  • Ultra-quiet operation


  • The suction seal on the water reservoir cap is hard to remove without making a mess.



7. Homech Quiet Ultrasonic Humidifier – Best Budget Filterless Humidifier

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Don’t let the low price of this product fool you – despite this; it actually has a lot of things to offer. One of them is the 360-degree humidity coverage ensured by the rotating nozzles.

They will make sure the entire room gets covered by the released mist, which is amazing when you don’t want any spot to be left out.

The tank has a capacity of 4L, which ensures the unit will run for more than 60 hours of continuous use. This way, constantly checking the humidifier will not be necessary.

When the water decreases, the unit will shut off by itself, thus preventing potential damage to the device. This ultrasonic humidifier has a noiseless operation.

The noise level is reduced to 26Db – so you can use it whenever you want, even while you’re trying to sleep.


  • Safe to use thanks to the auto shut-off feature
  • The tank has a wide opening allowing you to maintain it properly
  • Large capacity that allows the device to run for a long amount of time
  • Carry handle that makes it easy to take from a place to another


  • Mold can occur if you don’t clean it frequently


Best Humidifier Without a Filter Buying Guide – Who Needs a Humidifier Without a Filter?

best humidifiers without filters in workHumidifiers without filters are great options for people who don’t have the time to deal with constantly checking the filters of these units.

Filters must be washed to remove the debris they accumulate over time. If the filter is not a washable one, you have to throw away the used one and buy new filters.

That being said, you are constantly stuck having to check the unit’s filter to make sure everything’s alright and the vapors produced are clean and safe.

Additionally, filters can be quite a costly investment. Sometimes, filters for a specific humidifier model can be very expensive, which is not great for a budget. And even if the price is not that high, constantly buying new filters is still costly.

That’s why humidifiers without filters are so amazing – they don’t require any further investment. Moreover, people who don’t suffer from any allergies might not have to use filters.

So, a filterless unit will not cause any harm.

How Does a Filter-Free Humidifier Work?

A filter-free humidifier is a unit that lacks a filter. For it to work, it will pass the water from the tank through the operating system.

It pretty much breaks the water molecule down, all depending on the type of device. After that, the water will turn into mist and be sent to the air, moisturizing it.

This will help with a lot of conditions such as cough, congestion, dry skin, and more.

For them to function properly and maintain their good condition and durability, these units will come with built-in purifying systems.

These will take care of the allergens and bacteria that may accumulate inside the device – preventing them from being sent into the air when the mist is released.

So, a humidifier without a filter will work similarly to a humidifier with a filter. The only difference is that the purifying process doesn’t involve a filter.

Filtered vs. Filterless Humidifiers: What Are the Differences?

There are some differences when it comes to filtered and filterless humidifiers.

First of all, a filtered humidifier will always require you to change the filters, which is not only annoying for busy people but it’s also a costly investment.

However, some units use reusable filters, which are a better alternative in the long run if you want to save some cash.

Filtered units use filters to clean the water of allergens and bacteria before releasing it into the atmosphere. But they tend to cause more noise compared to a filterless unit.

Now, when it comes to filterless humidifiers, you don’t need to check the filters all the time to see if they need to be changed or washed.

Not to mention that you will also avoid the costs of having to buy new filters all the time. However, filterless humidifiers require maintenance when it comes to other parts.

This is because they use other methods to get rid of the bacteria and dirt. You will have to use disinfectants and cleaning solutions to eliminate any dirt or debris that gathers inside the device over time.

From that point of view, a humidifier with no filter will require more maintenance.

Types of Humidifiers that Work Filterless

When shopping for the best humidifiers without filters, you will come across multiple types.

  • Steam Vaporizers

Steam vaporizers work by heating or boiling the water in order to release it into the environment. The water has to reach very high temperatures to turn into mist.

What’s great about them is that the bacteria will be killed during the process because they heat the water. So from this point of view, they are safer than cool-mist humidifiers.

However, they can get very hot when they’re being used, making them very risky for houses with pets or children.

  • Ultrasonic Humidifiers

Ultrasonic humidifiers contain a diaphragm that vibrates when the ultrasonic frequency is being produced. When this happens, the water droplets will turn into mist when being released.

Ultrasonic units can be cool mist or warm-mist humidifiers or units having both features available. Out of all the types of humidifiers, this one uses the least amount of energy, and it’s also the quieter option due to having no fans.

  • Impeller Humidifiers

Impeller humidifiers can create mist thanks to a rotating disk that throws water at a diffuser. This will break the water into droplets that will then be released into the atmosphere.

Although they are great and don’t consume a huge amount of energy, these humidifiers are not as popular as they used to be. They also tend to cause some noise because of the rotating discs.

Moreover, they require constant maintenance as bacteria and mold will form very easily.

How Do You Clean a Humidifier with No Filter?

Cleaning a filterless humidifier

Cleaning your humidifier is a must considering there is no filter to prevent the dirt from reaching the inside of the unit.

Although other things stop the bacteria from spreading immediately, cleaning is still required. It’s essential to rinse it once per day or every few days.

First things first, you have to unplug the unit and then disassemble it. Next, remove the tank and ensure no water is left in it. Once the water tank is removed and empty, wash it properly. Finally, you can use three cups of vinegar to get rid of all dirt and debris inside.

You can let it sit for around an hour, but you should also take a scrub brush and eliminate any potential grime you find on the surface. Again, make sure you only use vinegar and no other type of cleaner.

Disinfect it by pouring a mixture made of a teaspoon of bleach and a gallon of water. Then, after letting it sit for a while, wash it properly and get rid of any substance you used to clean it.

Reassemble the unit, fill the tank with water and start using it again. The mist generated will be clean and bacteria-free now.

If you want to maintain it for longer, make sure to use distilled water and clean and drain the unit before you store it. This will make sure you don’t have to wash it that often.

Best Humidifiers without Filters FAQs

Here are some common questions about these humidifiers.

1. Will the air be healthy to breathe if I don’t use a humidifier with a filter?

Yes, the air is healthy if you don’t use a humidifier with a filter because filterless humidifiers still use different methods to maintain safety.

However, you should clean the unit regularly because there may be dirt and debris that gather a lot over time and become unsafe. If you clean the humidifier regularly, then you can keep your house’s air clean.

2. Are filter-free humidifiers safe?

Humidifiers without filters are perfectly safe, so you don’t need to have any safety concerns whatsoever. Most of the time, these units are made of plastic.

As such, they went through antibacterial treatments that made them safer to use overall. But, of course, this also depends a lot on how often you clean your tank and unit.

3. Can I use regular tap water for my filter-free humidifier, or is only distilled water allowed?

Regular tap water can be used for your humidifier as long as it’s not too high in mineral content. But if you live in an area with water high in minerals, you will notice deposits on the tank, which is not healthy.

Distilled water is your best option because it’s safer overall and will maintain the unit’s durability for longer.

4. What is white dust, and what can I do about it?

White dust is what you see on your humidifier after using water high in minerals. When the unit is working, this dust can be released into the air, which can be a nuisance.

You will see it on the furniture too – so, you will have more cleaning to do. You should use distilled water to prevent such things from happening.

5. How often should I change the water in a filter-free humidifier?

The water should be changed every day. After it runs out, the tank should be rinsed thoroughly and only then filled with fresh water.

Read also: DIY Humidifier – 11 Ways to Humidify a Room Naturally


Picking the best humidifiers without filters is not easy, but we hope we were able to help you. You can use the buying guide when shopping for your unit or pick one from the reviews.

You have to make sure that it meets all your needs and preferences.

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Melanie Mavery is an aspiring HVAC technician who is fascinated by the trends and opportunities in the HVAC industry. She spends most of her day writing content on home improvement topics and outreaching to prospects.  She's always looking for ways to support HVACs!