Boneco U650 Ultrasonic Warm & Cool Mist Humidifier

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The Boneco by Air O Swiss U650 Ultrasonic Humidifier has been discontinued.

The Boneco U650 humidifier by Air-O-Swiss make an excellent room humidifier for your home or office. The Boneco by Air O Swiss U650 humidifies an area up to 650 square feet with a cool or warm mist. See Boneco U650 rating and reviews.

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With its sleek, high-quality design, efficient air humidification, and multitude of features, the Boneco by Air-O-Swiss U650 Digital Ultrasonic Warm & Cool Mist Humidifier is the ultimate solution for those seeking to relieve dry skin, swollen nasal passages, asthma and other issues caused by dry air. A high-frequency vibration technology generates your choice of warm or cool micro-fine mist for optimal comfort. The thoughtfully designed Boneco by Air-O-Swiss humidifier includes a Hydro Cell for fresh and clean humidication performance and a demineralization cartridge to help prevent white dust. The Intelligent Temperature Compensation (ITC) technology and built-in hygrometer monitors the temperature and humidity levels in order to provide the perfect amount of micro-fine mist for unsurpassed air quality. Additionally, ultra-quiet operation, a sleep mode function and a display dimmer for the controls allow you to sleep even more soundly. Operation is a breeze with its digital soft-touch controls and the large LCD display! This reliable machine comfortably humidifies a room up to 650 square feet and disperses up to 3.5 gallons of moisture per 24 hours.

Compare all models using our helpful Air-O-Swiss Comparison Chart.
See all Air-O-Swiss replacement filters and accessories.
  • Needs relief from sore throat, dry nose, lips or skin
  • Is seeking a stylish, compact humidifier for a room up to 650 square feet
  • Wants a humidifier with built-in hygrometer and easy to read digital display
  • Suffers from allergies, asthma or sinus pressure and wants a portable humidifier free of all common household mold and spores that can breed in tap water

  • Warm or cool mist option
  • Built-in digital hygrostat for controlled humidification
  • Auti Mode - automatically regulates the output to create the most comfortable relative humidity adjusted to the temperature in your room
  • Hydro Cell provides constant freshness in humidifier
  • Demineralization cartridge to prevent lime scales and mineral residues
  • State-of-the-art design with surface touch controls
  • Desired humidity level settings: 30% - 80%
  • Dual mist output direction control
  • Provides fast output of mist
  • 1 – 8 hours or continuous use timers
  • Sleep mode with display dimmer function
  • Mist output levels: 3
  • Virtually silent operation
  • Transparent tank
  • Automatic shut-off with tank empty indicator
  • Cleaning indicator
  • Equipped with stainless steel heat sink surrounding the titanium transducer
  • Long, durable and sturdy lifetime
  • Made in Korea

Display and Soft-touch Controls

Removable Tank

About Ultrasonic Technology: uses high-frequency vibration to generate a micro-fine mist. A fan blows the mist into the room where it immediately evaporates. Ultrasonic humidifiers consume very little power, are virtually silent and produce a fog-like mist.

Cleaning: The recommended cleaning intervals depend on the air and water quality, as well as operating times. Every two weeks the water tank and base should be cleaned and rinsed with water only. Only use the brush that is included to clean the membrane once a week. Change the water in the tank at least once a week if water is standing for more than a week.

Replacements: The Hydro Cell is an advanced water maintenance system that ensures your humidifier's functionality while providing fresh humidification performance. It needs to be replaced every 1 - 2 months depending on water quality. The demineralization cartridge has to be replaced every 2-3 months. If the water is very hard, it may be necessary to replace the cartridge earlier. White dust around the device is a sure sign that the cartridge needs replacing.

See all Air-O-Swiss replacement filters and accessories.

Please note: In order to maximize the performance it is recommended the unit be placed at least 2 feet off the floor to allow the mist the opportunity to evaporate before hitting the floor and to eliminate the carpeting or wood floor surrounding it from becoming damp.

The following situations could contribute to excessive white dust so are recommended to be avoided:
  • Using water that has been treated by a water softening system could result in an increased incidence of white dust due to the excess sodium in the softened water. Therefore, it is recommended to use water that bypasses the system, bottled, or distilled water.
  • Use of this product with a negative ionizer air purifier or air cleaner with an optional post ionizing function could contribute to an increased collection of dust on surfaces. If this occurs try operating this product without the negative ionizer air purifier or with the optional ionizing function on the air cleaner off.
1. Room Coverage
2. Level of Quietness
3. Filter Life & Cost of Replacement Cartridges
4. Amount of Maintenance Required
5. Anti-bacterial Features
6. Ease of Filling
7. Ease of Operation and Filter Replacement
8. Quality of Construction
9. Humidistat to select desired humidity level & hygrometer to display the actual humidity in the room
10. Frequency of Filling
11. Value for Price

Once again Boneco by Air-O-Swiss has introduced another terrific humidifier to its line-up. This model includes variable mist settings, digital touch controls to set the desired humidity and displays the actual humidity. The auto/sleep functions plus the choice of warm or cool mist and the large room coverage completes the package.


  • The AOS U650 immediately delivers a powerful mist into the air and can humidify a good-sized room up to 650 square feet rather quickly if the conditions are right (such as having the door closed). Due the amount of mist it can disperse we always recommend placing the humidifier on a nightstand or stool at least 2 feet high to prevent the floor from getting soaked.
  • We find our Boneco by Air-O-Swiss humidifiers to be almost completely silent and basically can’t be heard when it is placed across the room. Other added features for those who want the best humidifier while sleeping is its night-time display dimmer (for those sensitive to light) and sleep mode which will control the perfect nighttime humidity level.
  • Air-O-Swiss has constructed a compact, lightweight and easy-to-fill tank. It fills from the bottom and can fit in the majority of sinks and some deeper bathroom sinks (the tank is 9' high).
  • Want a humidifier that will keep constant comfort without much effort on your part? The AOS U650 not only allows you to choose your desired humidity level but with its built-in hygrostat the humidifier will automatically adjust the humidity output when conditions change within the room. Plus it conveniently displays the actual humidity right on the unit.
  • The soft touch controls are sleek, modern and reliable. Plus, the digital display is the perfect size and easy to read. Reading the manual and getting used to the icons is a must if you want operation to be a breeze.
  • Its Hydro Cell and demineralization cartridge ensures only safe, hygienic mist is being dispersed. Plus, such protection will keep the tank and components in tip-top shape and prolong the life of the unit.
  • This is a robust humidifier with Swiss engineering and construction and will perform highly day in and day out. The AOS U650 and its manual U600 model are the only Air-O-Swiss humidifiers that come with a stainless steel heat sink instead of plastic surrounding the titanium transducer.
  • There is no doubt that this is one stylish humidifier that can fit nicely in almost any room without disrupting too much of the décor.
  • Due to its large room coverage and the Swiss engineering and construction, we consider the AOS U650 valuable for the money.


  • If you are humidifying one room, you will need to fill this humidifier up once per day, but if humidifying larger spaces fill-ups will be more frequent
  • Cost of the humidifier and replacement cartridge and Hydro Cell is a bit more than the average humidifier but well worth the money


Boneco by Air-O-Swiss has done it again with a model that does everything. This is certainly a durable, technologically advanced machine which will properly humidify a bedroom and bring relief to symptoms associated with dry air. The Boneco by Air-O-Swiss U650 features a sleek style, state of the art controls and settings and the best of the best when it comes to humidification performance. Although a bit pricey, it is all worth it with what it delivers and is the right choice for someone looking for near perfection. We are pleased to offer yet another 5-star rated Boneco by Air-O-Swiss humidifier to our lineup.

Boneco by Air O Swiss U650 Ultrasonic Humidifier


Boneco by Air O Swiss U650 Ultrasonic Humidifier

Technical Specifications of Boneco by Air O Swiss U650 Ultrasonic Humidifier

  Boneco by Air O Swiss U650 Ultrasonic Humidifier
Room Coverage
Room Coverage 650 sq. ft.
Tank Capacity
Tank Capacity 1.46 gallons
Humidification Performance
Humidification Performance Up to 3.5 gallons per 24 hours
Auto Shut-Off
Auto Shut-Off Yes
Noise Level
Noise Level <25 dB(A)
Power Supply (Volt, Hertz, Watts)
Power Supply (Volt, Hertz, Watts) 40 watts (cool mist), 125 watts (warm mist)
120V, 60Hz
Weight 8.8 lbs (without water)
Dimensions 14'H x 9.5'W x 11'L
Warranty 3 years

Video Reviews of Boneco by Air O Swiss U650 Ultrasonic Humidifier

Filters & Accessories for Boneco by Air O Swiss U650 Ultrasonic Humidifier

EZ Cal Humidifier Cleaner

3 Packages of EZCal decalcification cleaner for all AOS units. 3 packets per package for a total of 9 packets. For best results, use 1 packet for 32 oz of water every 2 weeks.

Availability: In Stock. Ships Same or Next Business Day.



Boneco AQUA PRO A250 2-in-1 Demineralization & Purification Cartridge

Reduces water hardness. Included active carbon removes odors and absorbs impurities from the water. Fits all Boneco and Air-O-Swiss Ultrasonic Humidifiers (except the 7146 Travel). Replace every 6 months.

Availability: In Stock. Ships Same or Next Business Day.

AS HU A250