Best Cool Mist Ultrasonic Humidifier Reviews

The level of humidity in the air has a very strong impact on the health of those who inhale it. Humidity refers to the level of moisture in the air.

Many of the respiratory health problems that adults and children suffer during dry months of the year are related to the reduced levels of humidity.

During dry months such as winter, humidity levels can drop to as little as during the rest of the year.

A lack of moisture in the air causes irritation of mucus membranes in the respiratory passages, making people prone to infections such as colds, flu and coughs.

When we are outdoors, there is no way to control the level of humidity we are exposed to, but indoors there is better opportunity to influence this factor. Thankfully, we spend majority of our days indoors and can therefore control the humidity through use of humidifiers.

Humidifiers are electrical devices that can be used to add moisture to the air within a confined space. Typically, one has a choice between warm mist and cool mist humidifiers. The key difference between the two is that warm mist humidifiers make use of heating implements to ensure the vapor released is warm. Both options can however be equally effective in increasing humidity levels in the air.

Here we will focus on the variety of cool mist ultrasonic humidifier that makes use of a small vibrating metal diaphragm to breakdown water in the device into a fine vapor mist. Unlike the only other option of cool mist ultrasonic humidifiers, evaporative humidifiers, they do not make use of fans to blow out the vapor mist.

The cool mist that these humidifiers produce can be useful in making the atmosphere more comfortable if the climate is warmer. So not only is humidity released, there is also a cooling effect to make the space more comfortable to inhabit.

Top 5 Best Cool Mist Ultrasonic Humidifier Reviews

PureGuardian H965 70-Hour Table Ultrasonic Cool Mist Humidifier

The PureGuardian H965 is an aesthetically pleasing ultrasonic cool mist humidifier with an impressive 1-gallon capacity that can run for up to 70 hours on a single refill, with low settings.

It features a single button control for on and off functions, and 3 speed mist control settings. This humidifier is ultra-quiet even as it emits the desired soothing cool mist. The multi directional nozzle helps to boost the coverage of the mist being released.

The PureGuardian H965 also comes with a low water indicator that lets the user know when it is time to refill and automatic shut-off function if water is completely depleted.

Although it is on offer at above average prices for such humidifiers, it comes with patented Silver Clean technology that coats the interior. This silver protection works as a fungistatic agent that prevents mold and mildew growth. Also comes with an impressive 3-year limited warranty when bought new.

TaoTronics Cool Mist Ultrasonic Humidifier

TaoTronics Humidifier Ultrasonic Cool MistTaoTronics is a trusted brand in the humidifier industry with a wide selection of options to choose from. Their Humidifier Ultrasonic Cool Mist option is very popular thanks to the many functions it offers.

These include an in-built timer and water purifier, LED nightlight display, mist level control, sleep mode and timing settings. The TaoTronics Humidifier Ultrasonic Cool Mist comes with a gallon capacity and 15-hour working time.  This means a refill in the afternoon should last you the entire night.

It also features a microporous cartridge, which works to filter out microorganisms, calcium and magnesium from water to create a healthier and cleaner mist. This humidifier can comfortably control the humidity levels of rooms of up to 538 square feet. The 360-degree rotatable nozzle also allows you to control the direction of the mist expelled to your liking. Low-level protection helps to protect your device by shutting it off when water levels drop too low.

Drop Shape Cool Mist Ultrasonic Humidifier

Drop Shape Cool Mist Ultrasonic Humidifier Water Tank 360 Degree Rotation BlueJust as its name suggests, this device comes in a drop shape with a transparent tank sitting on top of solid base that is shockproof and fire resistant.

The transparent tank makes it easy to tell when a refill is required and comes with an in-built handle that makes it easy to transport when refilling.

The tank offers a 2.3-gallon water capacity and can run for up to 19 hours when full. This humidifier can comfortably control humidity within a room of up to 600 square feet.

It features two 360-degree rotation nozzles that you can adjust to focus the direction of the mist. It is a typically quiet ultrasonic humidifier, which may emit a low humming noise when set at maximum power. This noise however goes unheard if you are more than a meter from the device. Comes with auto shut-off function to prevent overheating in the event water runs out. It does not come with evaporating pads, filters, wicks filters or cartridges that need replacement.

Crane Adorable Owl Ultrasonic Cool Mist Humidifier

The owl shaped Crane Adorable Ultrasonic Cool Mist Humidifier is an award winning device that is tailored for use in children’s bedrooms. The fun design works well with children’s bedroom decor and features an auto shut-off safety sensor that is triggered when water in the tank is depleted.

It can run for up to 24 hours on just 1 gallon of water capacity and at medium settings. It is an ultra-quiet model that should allow for a peaceful night’s sleep.

It also features Clean Control Antimicrobial Material in the base to help reduce mold and bacteria growth in the tank. It is also highly energy efficient at just 45W. If you make use of water that tends to result in fine powder remaining after the mist, opt for model HS-1932 which comes with a demineralization filter. Comes with a 1-year manufacturer’s warranty.

PureGuardian H900P 10-Hour Nursery Cool Mist Humidifier

This is another top selling PureGuardian ultrasonic cool mist humidifier, which also comes with silver clean protection that destroys mold and mildew bacteria in the water tank.

The PureGuardian H900P 10-Hour Nursery Cool Mist Humidifier is compact in design, with a height of just 7.5 inches. It is popularly used in nurseries and when travelling. 

It is an ultra-quiet device that allows for peaceful sleep even when close by the bed.

That tank capacity is at 0.21 gallons and can run for up to 10 hours on low settings. It features a low water indicator that alerts the user when a refill is required. The device can be found in a choice of pink or blue colors, and comes with a 3 year limited warranty.

Cool Mist Ultrasonic Humidifier Benefits

  • Soothe respiratory problems – dry air negatively affects the mucus membranes of the nose throat and lungs. They become easily irritated and immunity is lowered. This is one of the reasons virus infections are so easily caught and spread during such times. It has been proven that the use of humidifiers helps to alleviate these problems and negate the need to continually treat problems, like flu, sinusitis and coughing, with medications.
  • Improve skin health – dryness tends to damage the skin, especially amongst children. A lack of moisture causes the skin to become dehydrated and crack. This can cause many to feel itchy and result in scratching that can provide entryway into the body for infections. The use of humidifiers and regular moisturizing is a big help in resolving these problems.
  • Affordability – cool mist ultrasonic humidifiers tend to be more affordable than warm mist options, primarily because of the lack of a heating element. They also tend to consume less energy when run, thereby allowing for lower impact on utility bills. Their simple design also means that the only replacement part a user has to be concerned about is demineralization cartridges. These cartridges work to get rid of minerals in the water that can result in a harmless and fine white dust settling around the area of the humidifier.
  • Silence – cool mist ultrasonic humidifiers are the quietest choice of humidifiers in the market. This means even if you run them through the night, you should be able to enjoy their benefits without any disruption to your sleep.

The only downside to using cool mist ultrasonic humidifiers is that they are not available in sizes that can cater to large spaces. When investing in this kind of humidifier, it is important to remember it will only be of use in small spaces, otherwise you may have to opt for larger evaporative cool mist humidifiers.


Humidifiers can for many people seem like an unnecessary expense, but when your quality of health tends to suffer during the dry periods of the year, chances are humidity plays an active role as the cause.

Many medical professionals recommend the use of humidifiers, especially the ultrasonic cool mist variety to solve this problem. Just as with any other appliance, it is important to remember the importance of hygiene as the use of water in the device can provide a breeding ground for mold. Daily cleaning with a bleach solution is recommended.

When introducing the use of a humidifier in the home, it is a good idea to begin with lower settings and work your way up to a level of humidity that is most comfortable and healthy for the occupants of the household.

Starting out with an evaporative cool mist humidifier is a good idea before you may eventually decide to upgrade to larger and more expensive whole house humidifiers. Our ecommendation of the top 5 best cool mist ultrasonic humidifiers is good place to start as you begin to consider your options in the market.

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Rosie M. Jordan

Hello my name is Rosie. I am a 36-year-old SAHM to an energetic little boy called Andrew. We love reading, Toddler Sense, the library and trips to the park. To get in touch you can email us

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