Thanks to the rise of the filterless humidifier, gone are the days of cumbersome maintenance routines and the need for replacement filters. These innovative marvels have redefined the way we infuse our living spaces with moisture, offering a hassle-free solution to the woes of too-dry air.

Unfortunately, the market is flooded with options, so choosing the right one can be difficult. Fear not, however, because I’ve sifted through the offerings to bring you a curated selection of the finest filterless humidifiers available.

Each of these models will not only simplify your life but also contribute to a cleaner, more sustainable environment. 

These 5 best filterless humidifiers represent the cutting edge of filter-free humidification technology, ensuring your space remains comfortably humid without any added fuss. So join me below and explore these top contenders for the best filterless humidifiers.

What To Consider When Buying A Filterless Humidifier

Navigating Essential Features

When looking for a filterless humidifier, certain features take center stage, offering the most value and functionality. You should become familiar with these key aspects before making your purchase:

Capacity and Coverage Area

A humidifier’s tank capacity determines how long it can run before needing a refill. If a humidifier has a large tank it is more suitable for spacious areas, while smaller ones are ideal for more confined spaces.

Consider the square footage of the room you intend to humidify to ensure the chosen model can cover it effectively.

Ultrasonic Technology

Ultrasonic humidifiers use high-frequency vibrations to create a fine mist, resulting in near-silent operation when compare to evaporative warm mist humidifiers. This feature is crucial for bedrooms or shared spaces where quiet is paramount.


The ability to customize humidity levels ensures you can create the perfect environment for your comfort. Look for models with adjustable mist control settings to cater to changing seasons and individual preferences.

Auto Shut-Off

Safety features like auto shut-off prevent damage to your unit and conserve energy by turning off the humidifier when the water levels are low. 

Ease of Cleaning

You should always opt for models that have been designed with low maintenance in mind. These humidifiers come with removable and dishwasher-safe parts for effortless cleaning and upkeep.

Low-maintenance humidifiers will ensure that your investment remains in peak condition, delivering optimal performance over time.

Bonus Features

The best filterless humidifier for your home will offer added functionalities, such as essential oil trays for aromatherapy benefits, or nightlight options to help you create a soothing ambiance. These types of features will elevate your overall experience and enjoyment of the device.

Top Filter-Free Humidifiers Compared

5 Best Filterless Humidifiers Reviews

Everlasting Comfort Ultrasonic Humidifier

Everlasting Comfort Large Cool Mist Humidifiers for Bedroom, Baby, Home, Plants

With the Everlasting Comfort Ultrasonic Humidifier (from Amazon), you can enjoy anywhere between 22 and an astounding 50 hours of continuous moisture output. Ideal for spaces up to 500 square feet, this humidifier creates a consistent zone of comfort in bedrooms, nurseries, or other small room.

On the maintenance side of things, you can say goodbye to the hassle of frequent filter changes, and its user-friendly design makes refilling and cleaning a breeze.

Performance is excellent, with every corner of your space receiving the perfect level of humidification thanks to its 360-degree mist output nozzle. The unit also lets you adjust humidity levels with a single knob mechanism, allowing you to customize your comfort in a straightforward yet effective way.

The Everlasting Comfort ultrasonic humidifier features a tray to add essential oils, allowing you to transform any space into a calming oasis of aromatherapy and relaxation, custom-tailored to your favorite scents.

In summary, this filterless humidifier offers a seamless blend of comfort, health benefits, and convenience. With extended mist duration, versatile coverage, and an array of user-friendly features, it’s an exceptional addition to any living space. 


  • Features Auto shut-off
  • Low noise levels
  • Extended runtime
  • Includes an LED night light
  • Compatible with essential oils


  • Difficult to clean properly
  • Small capacity means it needs to be refilled more
  • Can be easily knocked down

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Honeywell HUL520L Mistmate Cool Mist Humidifier

Honeywell HUL520L Mistmate Cool Mist Humidifier

The Honeywell HUL520L Mistmate Cool Mist Humidifier is an excellent option for adding moisture to small spaces. Designed for approximately 150 square feet, it’s tailored for personal use.

While it’s not suitable for larger areas, it can hold about half a gallon of water and run for up to 20 hours, which is quite impressive for a personal humidifier.

One of the main perks of this Honeywell HUL520L is its near-silent operation. It emits a slight, barely perceptible hum. Moreover, its wide-mouth tank facilitates easy cleaning and refilling, distinguishing it from most other small models.


  • Large opening makes it easy to clean and easy to refill
  • Features a stylish design available in varied color options
  • Operates quietly
  • Offers up to 20 hours of runtime


  • Designed for small spaces only

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LEVOIT 6L Warm And Cool Mist Ultrasonic Humidifier

LEVOIT Humidifiers for Bedroom Large Room Home, 6L Warm and Cool Mist Ultrasonic Air Vaporizer

There aren’t many filterless humidifiers – outside of this list – that can compete with this one from LEVOIT. It boasts an impressive array of features that go beyond a basic user experience, such as the ability to easily switch between a cool and a warm mist output.

You can also get an impressive 36 hours of continuous runtime, meaning you won’t need to refill it for nearly two days. Additionally, the 12-hour timer feature provides even more added convenience.

The built-in humidistat is another noteworthy feature, enabling you to set it to operate until it reaches your desired humidity of your room – and you can monitor this level at any time on the display.

This filterless humidifier also serves as a diffuser. Levoit has included an essential oil tray, allowing you to customize your home’s ambient aroma or use oils for relaxation or a much-needed boost of energy.

You also get a remote control for even more added convenience, enabling you to adjust settings from the comfort of your bed or couch without needing to get up. On top of that, you get a two-year warranty commitment from LEVOIT to address any issues that may arise through regular use.

If what you are seeking is a feature-rich filterless humidifier for large rooms this LEVOIT model might just be the ideal choice for you.


  • Comes with a highly convenient remote control
  • Offers both warm and cool mist options
  • Allows manual control of humidity levels
  • Impressive runtime
  • Features a useful 12-hour timer
  • Backed by a solid two-year warranty
  • Includes an essential oil diffuser for added versatility


  • Not as quiet as other options on this list

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Vicks Filter-Free Ultrasonic Cool Mist Humidifier

Vicks Filter-Free 1.2 Gallon Bedroom Humidifier

The Vicks Filter-Free Cool Mist Humidifier (from Amazon) revolutionizes the humidification experience with its exceptional performance and convenience features. Like the other filters on this list, it eliminates the need for replacement filters, ensuring both time and cost savings.

A 1.2-gallon tank provides this humidifier with an impressive 30 hours of runtime, making it perfect for uninterrupted use throughout the night. Its whisper-quiet operation creates a tranquil environment that is perfect for medium-sized rooms like a bedroom or nursery. 

The Vicks humidifier is a true asset during cold and allergy seasons, offering relief from coughing and congestion for a restful sleep. Vicks provides a range of products to facilitate easier breathing, and this humidifier stands out as an excellent choice amongst the competition.

Offering top-notch performance, added features, and outstanding value, the Vicks Filter-Free Cool Mist Humidifier is a must-have for those seeking relief from dry air and congestion without the hassle of filter replacements.


  • Compatible with a plethora of Vicks products
  • Simple and user-friendly design
  • Operates quietly
  • Extended runtime for uninterrupted use
  • Affordable


  • Not designed for use with essential oils

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PureEnrichement MistAire XL Ultrasonic Cool Mist Humidifier

Pure Enrichment MistAire XL Ultrasonic Cool Mist Humidifier

The MistAire XL Ultrasonic Cool Mist Humidifier from PureEnrichment offers exceptional performance, providing long-lasting relief by safely and effectively moisturizing the air for up to 24 hours on a single tank.

Its substantial 1-gallon water tank and robust steam output ensure optimal coverage for large spaces like living rooms, and offices, spanning up to 500 square feet.

The added optional night light feature enhances relaxation, allowing operation in the dark with a choice of soothing blue, green, or red hues, making it a perfect addition for bedrooms as well.

The automatic shut-off function provides a welcome safety net. The feature turns the humidifier off when the water level is too low or the tank is removed. The absence of a filter simplifies maintenance and reduces ongoing costs. 

With the inclusion of essential accessories, a user-friendly manual, and the assurance of an industry-leading 5-year warranty, this humidifier stands as a reliable choice from a trusted brand with a vast customer base worldwide.


  • Automatic shutoff for added safety and convenience
  • Built-in nightlight for a soothing ambiance
  • Extended runtime
  • Multiple nozzle options for customizable mist direction
  • Backed by a five-year warranty


  • Not compatible with hard water

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Choosing The Best Filterless Humidifier For You

Filterless technology has revolutionized the way we humidify our spaces. No longer burdened by the need for constant filter replacement, these innovative and highly popular humidifiers without a filter offer hassle-free solutions to combat dry air.

But with so many options available, making the right choice can be daunting. Thankfully, each of the top-tier models above will not only streamline your life but also contribute to a cleaner, more sustainable environment.

But it is the LEVOIT 6L Warm and Cool Mist Ultrasonic Humidifier that stands out as the top contender. This air humidifier is surprisingly affordable, and it offers a range of impressive features. Suitable for a variety of rooms and living spaces, it ticks all the boxes for optimal performance and convenience.

Last update on 2024-05-29 at 16:35 / Affiliate links / Images from Amazon Product Advertising API