The best frequency for ultrasonic humidifiers ranges from 0.8 MHz to 1.7MHz even above depending on the brand, some brand uses 2.4 MHz, however, less frequency level less than 1.7MHz can be considered to construct humidifiers.
In true fact, high ultrasonic frequencies does not pose any danger to humans, but, exposure to low ultrasonic frequencies poses serious threats to the health, health issues such as headache, dizziness, tinnitus, and nausea.
Ultrasonic Frequencies above 20 KHz have no effects on humans, and ultrasonic humidifiers are designed at such higher frequencies.
So you have nothing to worry about, ultrasonic humidifiers are safe to use, so feel free to use them.
However, ensure you use ultrasonic humidifiers with distilled water to prevent the occurrence of white dust, which can affect your health negatively, and some models allows you to use the cartridge filter alongside the unit to purify the water, hence, disperses clean cool mist air.
With or without the cartridge to err on the safe side, it is advisable to use ultrasonic humidifier with distilled water to prevent white dust, as a result, of hard water.
But apart from this downside, ultrasonic humidifiers are great to raise the humidity level of the home with ultrasonic technology, which makes sure the machine quietly disperse the clean cool mist air with excellent functionalities such as the rotatable nozzles to adjust mist direction, timer function, and adjustable mist output.
And most ultrasonic humidifiers are suitable for aromatherapy, and to cap it all, they have a modern design which can complement any home décor, they are easy to operate coupled with convenience. Yes, all these functions packed into one unit. But what exactly are called ultrasonic humidifiers, and how do they operate?
Ultrasonic humidifiers relationship with frequencies
Ultrasonic humidifiers use vibrating diaphragm piezoelectric transducer, which vibrates to and fro at a high frequency oscillation of 1.7MHz, 0.8 MHz or 2.4 MHz to create water droplets that leaves the humidifier as a fine mist to humidify the air.
Ultrasonic humidifiers are great to provide relief from allergies, dry skin, chapped lips, dry throat, sinus congestion, and nose bleeds.
Humidifiers generate frequency which is not dangerous to human, however, the ultrasonic humidifiers can disperse contaminants like bacteria and virus even minerals depending on the quality of the water, which however, can be dangerous to the health, and that is the core reason you have to use the humidifier with distilled water.
But apart from this, ultrasonic humidifiers are excellent humidifiers; operates at high frequency, and quietly coupled with good functions that enable users use the product with ease and convenience. Now you have the information needed about ultrasonic humidifiers therefore, let’s check on the best brands of ultrasonic humidifiers from the best ultrasonic humidifiers reviews.
Summary of reviews
Product name | Unique for | Tank capacity (Liters) | Dimensions (inches) | Product link |
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Anypro Ultrasonic Cool Mist Humidifier Mist Humidifiers for Bedroom Ultra Quiet Air Humidifiers | Ultrasonic cool mist humidifier | 3.5 | 9x9.9x8.7 | |
Fancii Cool Mist Personal Mini Humidifier, USB or Battery Operated | Portable ultrasonic humidifier | 20 oz | 5x 4 x1.5 | |
Everlasting Comfort Ultrasonic Cool Mist Humidifier (6L) | Ultrasonic cool mist humidifier | 6 | 14.3x12.4x7.9 | |
PurSteam Ultrasonic Cool Mist Humidifier - Superior Humidifying Unit | Ultrasonic cool mist humidifier | 2.2 | 10.8 x 10.1 x 8.3 | |
Levoit Humidifiers, 6L Warm and Cool Mist Ultrasonic Humidifier for Bedroom or Baby's Room with Remote and Humidity Monitor | Warm and cool ultrasonic humidifier | 6 | 11.3x7x10.5 |
Contents
- 1 Best ultrasonic humidifiers reviews
- 2 Anypro Ultrasonic Cool Mist Humidifier Mist Humidifiers for Bedroom Ultra Quiet Air Humidifiers
- 3 Fancii Cool Mist Personal Mini Humidifier, USB or Battery Operated
- 4 Everlasting Comfort Ultrasonic Cool Mist Humidifier (6L)
- 5 PurSteam Ultrasonic Cool Mist Humidifier – Superior Humidifying Unit
- 6 Levoit Humidifiers, 6L Warm and Cool Mist Ultrasonic Humidifier for Bedroom or Baby’s Room with Remote and Humidity Monitor
Best ultrasonic humidifiers reviews
Anypro Ultrasonic Cool Mist Humidifier Mist Humidifiers for Bedroom Ultra Quiet Air Humidifiers

This is a perfect ultrasonic humidifier to raise the humidity level of a medium to large sized room up to 500 sq ft with the with the 3.5L large water capacity coupled with maximum mist output of 250 ml/h to provide relief from dry sinuses, nose bleeds, and dry skin.
It can run continuously for 20 to 36 hours depending on the mist level control settings using the control knob, and the mist direction is adjustable with the 360 degrees adjustable mist spray.
Low mist level setting will allow longer use compared to high settings. The base is design in such a way to prevent leakage or base crack, also made with antibacterial material to prevent the growth of mold, nevertheless, use the humidifier with distilled water!
And you can rest easy at night with the automatic shut off function coupled with the quiet operation.
Features include:
- Product Dimensions: 9×9.9×8.7 inches
- Weighs 2.9 pounds
- 3.5L water capacity
- Sound level ≤30dB
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Fancii Cool Mist Personal Mini Humidifier, USB or Battery Operated

This is a portable humidifier you can take along to anywhere you need relief from dry air, in the hotel, car, office, even on flights with the cordless feature and its light weight, and is also powered by 3 AA batteries or USB.
It uses 16 to 20 oz water bottle as water tank to disperse cool mist air. You also have the option to adjust the operating time between the interval 2hr, 4hrs, 6 and 8 hrs, and it auto shut off when water gets low.
Features include:
- Product Dimension: 5x 4 x1.5 inches
- Weighs 3.68 ounces
- Sound level less than 15dB
- It includes with wick filters
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Everlasting Comfort Ultrasonic Cool Mist Humidifier (6L)

The Everlasting comfort ultrasonic humidifier is a perfect solution to alleviate the inconvenience and stress in involved in frequent refilling with the 6L large water capacity.
Moreover, it does not require the use of filter to disperse clean mist, but, ensure you use with distilled water.
Everlasting comfort ultrasonic humidifier can operate continuously for 50 hours between refills with adjustable mist output of 270 ml/hr to cover a room size up to 400 sq ft coupled with quiet operation.
It is suitable for bedroom, baby room, kids’ room, dorm room, tabletop or desktop to help with allergies, and coughs.
This humidifier ensures you have a nice rest with the aromatherapy coupled with the LED nightlight with no worries of overheating for the unit will shut off automatically when unit tank is empty.
Features include:
- Product Dimension: 14.3×12.4×7.9 inches
- Weighs 4.25 pounds
- 6L water capacity
- It includes essential oil tray
- Comes with control knob and nozzles to control humidity
- Color-white
- 2-year limited warranty
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PurSteam Ultrasonic Cool Mist Humidifier – Superior Humidifying Unit

Pursteam Ultrasonic humidifier has a stylish design to decorate the home coupled with exceptional functionalities like the low water indicator light, variable knob control to switch on and off the unit also change the humidity levels.
It offers soothing light for maximum relaxation, and with the 2.2 liter water capacity it has 17 hours run time whether in the bedroom, offices or anywhere you need relief from dry air.
Pursteam safely and quietly add moisture to the air to make you sleep better, and you have the option to adjust the mist as it suits you.
Features include:
- Product Dimensions: 10.8 x 10.1 x 8.3 inches
- Weighs 2.2 pounds
- 2.2 liter water tank
- It comes with low water indicator
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Levoit Humidifiers, 6L Warm and Cool Mist Ultrasonic Humidifier for Bedroom or Baby’s Room with Remote and Humidity Monitor

Both the warm and cool mist can be integrated into one single unit of ultrasonic humidifier to have the option of warm or cool mist as it suits you.
Such instance of the ultrasonic humidifier is the LEVOIT warm and cool mist ultrasonic humidifier to raise the humidity level of medium to large sized rooms, which includes the bed room, baby’s room, offices and every other room that needs humidification to get relief from the dry air for longer use before refill with the 6L water capacity with mist output up to 300ml/hr for cool mist and 500ml/hr for warm mist.
It provides convenience with the remote also with the humidity sensor to automatically adjust to the most suitable humidity level coupled with the innovative of the unit to read out the actual humidity level to allow you set the humidity level to a comfortable level, and it shuts off automatically when tank is empty to ensure safety.
Features include:
- Product Dimensions: 11.3x7x10.5 inches
- Weighs 6.31 pounds
- 6L water tank capacity permit 20 to 36 hours continuous use
- Compatible with aromatherapy
- Built-in humidity sensor
- Sound level less than 36dB
- Made with ABS plastic material
- Anti-leak proof design
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Conclusion
The best frequency for ultrasonic humidifiers are found in the frequencies above 20KHz, because anything less is dangerous to humans, however, most ultrasonic humidifiers uses the 1.7MHz to add moisture to the air to provide optimum relief from the effects of dry air such as dry skin, dry throat, chapped lips, nasal congestion and cough.
And check on the best ultrasonic humidifiers reviews if you need one of these amazing humidifiers to provide relief from dry air.