Air-O-Swiss U650 Ultrasonic Humidifier

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Air-O-Swiss U650 Humidifier
Item#: AO0017
In Stock, Ships Jul 6 Shipping Details

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Air-O-Swiss U650 Ultrasonic Humidifier

As one of the latest additions to the Air-O-Swiss line of home humidifiers, the Air-O-Swiss U650 is an ideal humidifier for keeping your home comfortable during the dry winter months. With convenient digital, soft touch controls, a sleek new design, and quiet efficiency, the AOS U650 displays the very best that Air-O-Swiss has to offer in a humidifier.

With the Air-O-Swiss U650 ultrasonic humidifier you have your choice of either warm or cool mist from dual mist outputs. An easy to read LCD displays allows you to quickly and easily determine what the relative humidity is, while alerting you when the tank is empty or when the unit needs to be cleaned. A Sleep Mode allows you to set the U650 and sleep peacefully, knowing you won't wake up to a sore throat or hoarse cough. Once filled with water, you set the humidity you want or allow the humidifier to set it for you with its built-in ITC (Auto Mode), and the AOS U650 quietly goes to work humidifying the air in any room in your home.

In line with other Air-O-Swiss ultrasonic humidifiers, the U650 uses high-frequency ultrasonic vibrations from a titanium coated diaphragm to turn the water in your tank to mist. The included Hydro Cell provides constant freshness in these humidifiers. The Hydro Cell uses activated carbon to remove impurities from the water, while a demineralization cartridge, which should be replaced every three months, prevents mineral residues from contaminating the water or becoming aerosolized and sprayed into the air. Lastly, a pre-heat feature not only warms the water but also helps to control microbes in the nebulizer reservoir. These four things work together to make Air-O-Swiss U650 one of the most hygienic and safest humidifiers on the market.

Air-O-Swiss U650 Dual Mist Humidifier Video

AIROSWISS U650 Humidifier Specifications

  • Main Voltage: 120 V / 60 Hz
  • Power Consumption: 40 W
  • Weight: 8.8 lbs (empty)
  • Size Dimensions: 9.5" x 11" x 14"
  • Area Coverage: suitable for rooms up to 650 sq. ft.
  • Humidity Output: up to 3.5 gallons a day
  • Tank Capacity: 1.46 Gal. (5.5 L)
  • Noise Level: < 25 dBA
  • Accessories: HydroCell and Demineralization cartridge

Product Features

  • Intelligent Temperature Compensation (ITC) - regulates output, adjusted to temperature of room.
  • Dual, warm mist humidifier (preheats water to 176° F) and cool mist humidifier
  • Hydro Cell, Ultrasonic Vibrations & Demineralization Cartridge work to capture minerals and remove/destroy microbes in the water before they are dispersed into the air
  • Hygrostat & Mist Output Regulator
  • Empty Tank & Cleaning Indicators
  • Auto Shutoff when tank is empty
  • Sleek Modern design with large LCD Display
  • Display Dimmer
  • Surface Touch Buttons
  • Sleep Mode with Timer
  • Timer: Set unit for 1 to 8 hours of run time
  • Diaphragm has a Titanium Membrane for increased longevity
  • Large and Transparent water tank (water level clearly visible)
  • Ultra Quiet Operation
  • Energy Efficient
  • 3 Year Warranty

Product Reviews and Questions

Write A Review
  Great product
Reviewed by: ne customer from NY

I love this humidifier. It is very practical, small and very quiet. The price was very low and shipping very fast.

Customer Q & A

Q1: I just bought the U650 and it came with a hydro cell in a bag inside the box, yet nowhere in the manual does it even mention a hydro cell! Where is it supposed to go and what does it do? Also, does not mention automatic shut off. What if the unit runs out of water when I am not home to refill? THX

A: Air-O-Swiss is transitioning all their humidifiers to the Hydro Cell in place of the Hydro Stick which was in place of the Ionic Stick. So there's some disconnect with some models having it, some not and the language in the manuals. The Hydro Cell is pretty simple in terms of use though. When you remove the screw-on lid for the water tank, just it inside before you fill with water. That's it. It's a small disc that contains carbon similar to a Brita or Pur water filter to remove minerals, chemicals and other impurities in the water. You replace it after about 1-2 months worth of use. And, when the unit runs out of water, it will simply shut itself off. I believe the U650 has a small indicator light on the front display that will light up, but the unit itself will turn off automatically.

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Air O Swiss U650 Ultrasonic Humidifier Reviews
Air-O-Swiss U650 Digital Humidifier

Air-O-Swiss home humidifiers have long been synonymous with quality humidification, and as the newest addition to their line of room humidifiers, the AOS U650 is the perfect blend of elegance and functionality. Quietly efficiency, the U650 ultrasonic humidifier helps to relieve the symptoms of dry air by raising the relative humidity in your home during the dry winter months. With a new design and touch controls, the Air O Swiss U650 is an ideal unit for most rooms in your home with a capacity of up to 650 sq. ft. After taking home this model for a weekend, this is what I found.

What I like about the Air-O-Swiss U650 Humidifier

The first thing I noticed with this unit was the design. It has a smooth, streamlined appearance with a simple white face and smoke/carbon colored tank. The black frame has a high gloss finish, so overall the unit has a very modern, Apply-style feel to it. After setup, the first thing that will strike you is the controls of this unit. The buttons are not raised but have a surface touch functionality to them. So they are smooth with the face. An LCD screen displays the current relative humidity level an by pressing the button that looks like water droplets. The screen then displays the set point you select before switching back to the current RH level in the room. With the timer button you can set the time from 1-8 hours or set it for continuous use. And light or sensitive sleeps shouldn't worry too much. Not only is the AOS U650 quiet, but the LCD display has a dimmer feature that can be manually set or automatically kicks in when you select Auto/Sleep. Indicator images appear on the screen that clearly show you the current mist output, what mode you are in, whether you have chosen the preheat function and when the humidifier needs to be cleaned.

The Sleep mode for this model was interesting. When you select it, the humidity automatically targets 50-65%; the timer is set to 6 hours; the preheat function kicks on, and the display dims. For most of us, this setting will help produce ideal sleeping conditions that will prevent you from waking up with a sore throat or dry sinuses.

The capacity is comparable to several of the Air-O-Swiss ultrasonic humidifiers we currently offer. The maximum output will easily put over 3 gallons of moisture back into the air over a 24 hour period. The tank itself, like most AOS humidifiers is bottom fill, so when you remove the tank, simply turn it upside and remove the cap to fill.

The choice of warm or cool mist is something more and more people are looking for in a home humidifier. With the Air-O-Swiss U650, you have this capability. In cool mist mode, room temperature water is turned to mist while in warm mist mode, the water is preheated to 176° F and leaves the spout at just over 100° F. It does this safely and without the use of a potentially hazardous boiler.

As with nearly all Air-O-Swiss humidifiers, the U650 is covered by a 3 year limited warranty. So should the humidifier malfunction during that time, you have the piece of mind in that your humidifier is covered.

What I do not like about the Air-O-Swiss U650 Humidifier

There have been occasional complaints about a white "dust" from continued use. This does happen on occasion, and can usually be resolved with a couple things. First, make sure that you are NOT using softened water. The sodium commonly used in water softeners will quickly overwhelm the demineralization cartridge and lead to this white powder. Secondly, replace the cartridge regularly. With hard water you may find yourself replacing the demineralization cartridge more frequently. Another alternative is to use distilled water and remove the cartridge all together. Regardless, the sole cause of this dust is a high mineral content, and this can be avoided in a variety of ways.

In all, the Air-O-Swiss U650 humidifier is an elegantly designed humidifier ideal for relieving symptoms commonly associated with cool, dry winter air. The digital features of this model make it one of the most advanced home humidifiers available. With little maintenance required, the U650 is an excellent all around humidifier with a solid warranty and sound brand reputation.

Why buy from Customer Testimonials
My son has always had a nagging cough when the weather gets colder, that persists all winter long. The Vornado Humidifier  seems to have helped him feel better, and I don't hear nearly as many late night coughing fits. Thanks!
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Humidifier Resources

Additional Resources

Air-O-Swiss U650 Humidifier User Manual     Air-O-Swiss U650 Humidifier Owners Manual
Air-O-Swiss U650 Quick Set Up Guide     Air-O-Swiss U650 Ultrasonic Humidifier Quick Set Up Guide
Compare Air-O-Swiss Humidifiers
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Humidifier Buying Guide
Humidifiers FAQ
Benefits of Home Humidification
Using a Humidifier


3 Year Limited Warranty


Discount AOS U650 Humidifier
Air-O-Swiss U650 Humidifier (Item#: AO0017) $239.99

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