10 Best Filterless Humidifiers of 2021 – Healthy & Cost Efficient

Eileen Martin
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There are many good reasons people use humidifiers, including dry skin, asthma, SIDS, and more.

Recent studies, however, show that the most common reason for using a humidifier is simply because you enjoy the way it makes you feel. It’s one of those odd things about how our bodies work, but when you basically live in a climate controlled room, it’s hard to avoid feeling dry.

A humidifier provides all day comfort that even the best dehumidifier can’t. But it’s not an easy thing to find a good humidifier. There are so many on the market, and many of them fall short in important areas. Quality is often an issue, while both cost and size are pain points for others.

There are also many filterless humidifiers that are safe and healthy to use. They are more affordable and significantly easier to clean than many of their competitors.

If you’ve decided on a filterless humidifier, there are many awesome options to consider, such as the Vicks filterless cool mist humidifier. As a market leader, this cool mist humidifier has been trusted in countless homes, and it will likely do a great job in yours too.

NameCategoryProduct
Vicks Filter-Free Ultrasonic Visible Cool Mist HumidifierBest OverallVicks Filter-Free Ultrasonic Visible Cool Mist Humidifier
GENIANI Ultrasonic Cool Mist HumidifierBudget PickGENIANI Ultrasonic Cool Mist Humidifier
Everlasting Comfort HumidifiersUpgrade PickEverlasting Comfort Humidifiers

1. Vicks Filter-Free Ultrasonic Visible Cool Mist Humidifier

Our rating: 9 / 10

Vicks Filter-Free Ultrasonic Visible Cool Mist Humidifier

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Pros:

  • Optimal for medium size rooms
  • Visible technology
  • Visible see-through tank

The Vicks Filter-free Ultrasonic Humidifier is the ideal medium-size unit for the bedroom, living room, baby’s room or office. It comes with a 5-oz. tank and has an auto shut off feature with automatic adjustment of mist output.

The cool mist produced is visible, which means you can see where the mist is going and how effective the unit is. You can also see how much water is still left in the tank and when to refill it.

The tank is not see-through all the way to the top and does not have a scale to measure the amount of water left in the tank. It comes with a scent disc, which is where the menthol scent comes from.

Read more about the Vicks Filter-Free Ultrasonic Visible Cool Mist Humidifier

2. Honeywell HUL535B Cool Mist Humidifier Black Filter Free

Our rating: 8 / 10

Honeywell HUL535B Cool Mist Humidifier Black Filter Free

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Pros:

  • No filter to replace
  • Auto shut-off feature
  • Low price

Cons:

  • Only medium-sized room
  • Slow mist production
  • Bad customer service

Office.

Among the best filters-free humidifiers available right now, the Honeywell Cool Mist Humidifier stands out for its auto shut-off feature, which turns it off when it’s exposed to excessive moisture. The downside is that it’s only appropriate for small to medium-sized rooms – so while it’s good for bedrooms, it’s not ideal for kids’ rooms or a whole-house humidifier.

Apart from that, the Honeywell Cool Mist is a solid performer, thanks to the adjustable mist output so you can set it to your preferences and the fact that it comes with a cover that can help keep it clean. Plus the fact that it is ultra-quiet.

Read more about the Honeywell HUL535B Cool Mist Humidifier Black Filter Free

3. Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier

Our rating: 8 / 10

Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier

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Pros:

  • Available at 4 or 8 hours
  • Available at white or black
  • Night light and automatic shut-off
  • Continuous running without the filter makes it easy to clean
  • Capable of storing enough water to last the whole night
  • Very quiet, don’t even have to worry about waking up a house full of people
  • Easy to setup
  • Slim, small, lightweight (about 6.5 lbs.)

The top rated product on our list of the best filterless humidifiers is the Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier. With features like night light, automatic shut-off, and a 5-gallon tank, it does the job just fine.

It’s small, lightweight, and capable of running up to 16 hours without requiring a filter cleaning. It’s also easy to use and easy to maintain.

The MistAire is so quiet that you may forget that it’s even on. Some reviewers have said that it doesn’t make much of a difference in their room. However, some claim that it has provided relief from dryness, coughing, and nosebleeds in children with asthma.

Read more about the Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier

4. GENIANI Ultrasonic Cool Mist Humidifier

Our rating: 8 / 10

GENIANI Ultrasonic Cool Mist Humidifier

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Pros:

  • 24/7 run time
  • Energy efficient
  • Low maintenance
  • Requires no filters
  • Quiet operation
  • Affordable price and good quality
  • No white dust is produced

Read more about the GENIANI Ultrasonic Cool Mist Humidifier

5. Cool Mist Humidifier

Our rating: 8 / 10

Cool Mist Humidifier

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Pros:

  • 6 different settings to choose from to customize your experience
  • You can regulate the amount of humidity by the amount of mist that you want to come out of the unit
  • Very quiet, works seamlessly in the background
  • The night light is soft, there is no bright light to disturb your sleep
  • The top of the unit can be used as a mesiier and the water tank can be used for a lot of things
  • The tanks are large in size so they do not need changing very frequently (you will be able to use the tank for about 30 hours or so)
  • The machine is very easy to use
  • The design of this product is very sleek
  • Each tank can last about 8 to 10 hours
  • The cold mist humidifier is very affordable, especially for the features it comes with

Cons:

  • The tank is a little difficult to open
  • The humidifier does not come with a humidistat
  • The humidifier is small in size so it would not be suitable if you have a large house or a lot of space
  • The product does not come with a warranty

Read more about the Cool Mist Humidifier

6. Everlasting Comfort Humidifiers

Our rating: 8 / 10

Everlasting Comfort Humidifiers

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Pros:

  • Fits perfectly on a warm and cool nights
  • Provides great humidity in the bedroom with the essential oils
  • You can use any altoids tin to refill with water
  • Won’t stain your furniture with the water that it spills
  • You can use the boric acid it comes with to get rid of acne if your oily skin breaks out
  • The LED blue lights are great for the bedroom at night
  • Mold Proof

Cons:

  • Water doesn’t last very long, but that’s expected for a small humidifier
  • Personally, we didn’t like the colors of the LEDs, but it’s just personal preference

When it comes to a humidifier that you can use with essential oils, The Emspack Humidifiers is a great option. It’s pretty big, which means it’s not designed for small rooms like a bedroom. However, it’s perfect for living rooms, especially when you have it used during parties and other get-togethers.

Read more about the Everlasting Comfort Humidifiers

7. Guardian Technologies Pure Guardian H940 Ultrasonic Cool Mist Humidifier

Our rating: 7 / 10

Guardian Technologies Pure Guardian H940 Ultrasonic Cool Mist Humidifier

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Pros:

  • Affordable
  • Makes a significant difference in air moisture levels and overall comfort … especially during the winter months
  • Elegant design
  • Has soft, soothing, and natural sounds (which can be silenced)
  • Ultrasonic technology… whisper-quiet operation (difference between ultrasonic humidifier and the cool mist humidifiers, which includes a fan)
  • No filters needed

Cons:

  • Lid doesn’t seal tightly (although the inside filter catches 99.99% of bacteria, dust, and other particles)
  • No humidity indicator (this is meant to be used in small rooms of about 350sqft)

& Mildew, Auto Shutoff & Permanently Imbedded Filters, Free Shipping Via Prime.

Over one thousand people have reviewed this humidifier, giving it an overall rating of 4.3 out of 5 stars. More than half of the reviews are 5 out of 5 stars. What does this say about the Pure Guardian? It says that most people love it and are choosing it as an alternative to filter-type humidifiers.

Read more about the Guardian Technologies Pure Guardian H940 Ultrasonic Cool Mist Humidifier

8. Crane Drop Ultrasonic Cool Mist Humidifier

Our rating: 7 / 10

Crane Drop Ultrasonic Cool Mist Humidifier

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Pros:

  • Available at two capacities – 1 and 2-gallons
  • Does not require filters
  • Waterless auto shut off protection ensures continued use in case of excess water accumulation
  • Auto switch off function prevents breakdowns
  • You get a free gift with your purchase – a helpful instruction manual providing accurate guidance regarding water capacity, maintenance, etc.

Cons:

  • Doesn’t have a dry mode
  • There’s no reservoir
  • The tank drains out the unit’s dispenser
  • Remote function is unreliable

The Crane Drop filter-free ultrasonic cool mist humidifier is our favorite and the best choice in terms of value. While most of its competitors on this list come at a higher price and are often more gimmicky, Crane has managed to craft a product that outperforms others in its class.

From the get-go, this is one of the most affordable filter-free humidifiers you can get that just works consistently well. It comes with a number of modes for you to choose from, including continuous, intermittent and sleep modes, and has an intuitive remote control.

It has a sleek design to add to its aesthetic appeal and comes at a great price with two different capabilities – 1- and 2-gallon versions.

Read more about the Crane Drop Ultrasonic Cool Mist Humidifier

9. OPOLAR Quietest Filter-Free Digital Humidifier

Our rating: 6 / 10

OPOLAR Quietest Filter-Free Digital Humidifier

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Pros:

  • Preset humidity
  • Quiet operation
  • Runs for 24 hours on lower settings
  • Good customer support

Cons:

  • No auto mode
  • Coils cheap plastic, which means it breaks quickly
  • A bit smaller than mentioned

Super Quiet and Compact, Best Humidifie.

Apolar’s third generation humidifier is a great air purifier for baby/child room or bedroom. It features hygrometer, vortex cleaning technology, preset humidity control and sleep mode.

The humidifier is designed to be the quietest humidifier. Because it doesn’t use filters it won’t mess up your room with white dust and they are very economical.

Read more about the OPOLAR Quietest Filter-Free Digital Humidifier

10. GX·Diffuser Ultrasonic Cool Mist Air Humidifier

Our rating: 5 / 10

GX·Diffuser Ultrasonic Cool Mist Air Humidifier

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Pros:

  • Great for rooms up to 225 square feet
  • Easy to clean
  • Air purifier
  • 6 soothing lights
  • Atomizing and humidifying ability
  • Quiet and cool mist

The GX·Diffuser Ultrasonic Cool Mist Air Humidifier is one of the best humidifiers you can find on the market. It has some features that make it a true winner in the competition, such as the following:

It is an ultrasonic humidifier, meaning it sprays the cool mist into the air you can feel and breathe in.

It has an automatic power control, meaning it turns on and off automatically with the changes in the air humidity.

Read more about the GX·Diffuser Ultrasonic Cool Mist Air Humidifier

Frequently Asked Questions (FAQ)

What is the best filterless humidifier?

The Vicks Warm Mist Humidifier is the perfect choice if you need a filterless humidifier.

The operation of this humidifier is super simple.

It features an adjustable mist output for personalized comfort in your room. The humidifier has three different settings including:

Low setting: gives out a five-gallon output of moisture each day.

Medium setting: gives out seven-gallon output of moisture each day.

High setting: gives out nine-gallon output of moisture each day.

Vicks Warm Mist Humidifier also feature a pleasant nightlight system that makes it easy to set up the nightlight. It helps you see in the dark when you are trying to check on your baby.

There is also a tray that is used to clean the water chamber. This tray aids in removing any residue or sediment easily from the water chamber.

Is it better to have a humidifier with a filter or without?

What about using essential oils?

Using a humidifier with a filter is more cost effective than using one without a filter but it does add to the overall cost of the humidifier.

Below are some of the pros and cons of using a humidifier with a filter.

Which humidifiers are the most efficient?

Humidifiers come in many different sizes, shapes, colors, and designs, but when it comes down to it, you are looking at two different types to choose from: filter or filterless.

If you are like most people, a filterless humidifier is a more attractive option. However, keep in mind that whereas there is no increased cost for preventive maintenance, a filterless humidifier does increase the overall cost to operate due to the fact that you will need to purchase a moisturizer to use with the machine.

But, even with this drawback, there are many advantages to a filterless machine.

For one thing, a humidifier is going to run continuously and, depending on the size of the home you live in, this can be a significant additional expense.

When it comes to running costs, a filterless humidifier is by far the cheaper machine to operate.

What is the best rated humidifier by Consumer Reports?

When it comes to the best rated humidifier on the market, simple is best. And a Sunbeam whole house humidifier provides just that. It has a large capacity at its disposal, so you can count on it to help ease congestion in the central heat of winter, yet going easy on the electric bill.

Reviews are generally good for this humidifier, specifically for its ease of use and maintenance. Some report that, while the instruction manual for the device is rather hard to follow, they were still able to figure it out by referencing YouTube videos.

Conclusion

There are many brands of humidifiers in the market today.

So finding the right one is not that easy, especially if you don’t know what to look for in a filterless humidifier.

Though you’ll find many brands with their own modification of how they work, they all carry out the same functions.

They can help you create a healthy and comfortable environment in your home, particularly if you live in a climate with low humidity.

You can get the best ones with just a few clicks because we’ve done all the research for you.

Our Recommendation

NameCategoryProduct
Vicks Filter-Free Ultrasonic Visible Cool Mist HumidifierBest OverallVicks Filter-Free Ultrasonic Visible Cool Mist Humidifier
GENIANI Ultrasonic Cool Mist HumidifierBudget PickGENIANI Ultrasonic Cool Mist Humidifier
Everlasting Comfort HumidifiersUpgrade PickEverlasting Comfort Humidifiers