Stadler Form William Humidifiers

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William Ultrasonic Humidifier


May we suggest:
Stadler Form Hera Ultrasonic Humidifier

Stadler Form William Humidifier

For spaces large and small, the Stadler Form William offers the ability to bring comfort back to your home with ease and style. A digital, push-button interface puts you in complete control of your indoor humidity with this powerful yet compact, ultrasonic humidifier. With a sleek, modern design bundled around practical features, the William is a great fit in any home where you are dealing with eczema, asthma, allergies, or just dry conditions during the winter months. Forced air heating systems dry homes, leaving you feeling uncomfortable or worse, but bringing your relative humidity up to 45% can eliminate those problems, making your home more comfortable for you but still inhospitable to dust mites and mold. Accomplish all this with the William Ultrasonic Humidifier.

Stadler Form William Humidifier Video

Stadler Form William Humidifier Specifications

  • Main Voltage: 120 V / 60 Hz
  • Power Consumption: 40W (Preheat Off) 125W (Preheat On)
  • Weight: 7 lbs (empty)
  • Size Dimensions: 9.75" x 13" x 6.25"
  • Humidity Output: up to 3.5 gallons a day
  • Tank Capacity: 1.5 Gal. (6 L)
  • Area Coverage: suitable for rooms up to 860 square feet
  • One Year Warranty

William Product Features

  • Built-in Hygrostat
  • Digital Display
  • Empty Indicator
  • Pre-Warm Water Feature
  • 3 Output Levels
  • Automatic Shutoff
  • Ionic Silver Cube
  • Demineralization Cartridge
  • Programmable 8 Hour Timer
  • Energy Efficient

Product Reviews and Questions

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Customer Q & A

Q1: How do I know when to change the cartridge?
A: Two ways. First, remember that indicator strip you used to test your water levels when you first got the William? In the user manual, there's a chart that matches the color hardness of your water. This will give you a good idea of when to change the cartridge. Secondly, the first scenario might not be something everyone remembers, but an easy way to tell when your cartridge needs to be changed is to look for a white dust. This is mineral content being vaporized. If you start to notice it around the humidfier, change the cartridge. If you want to check before you actually see this, take a small mirror, and with the humidifier running, put the mirror in front of the mist output. After a the mirror has been misted, allow it to begin drying and check for any white residue. This can sometimes allow you to determine when it needs to be changed earlier rather than later.

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Stadler Form William Ultrasonic Humidifier Reviews
Stadler Form William Humidifiers

The William, an ultrasonic humidifier by Stadler Form, is the perfect example of stylish design and useful performance and functionality working hand in hand. Relieve the symptoms of severely dry indoor air effectively and quickly with the compact but powerful William. Winter months, when we use forced air heating systems, can severely dry out a home, to the point where it is uncomfortable. Especially for someone coping with eczema or asthma, extremely dry indoor air can cause coughing, itching and dry or cracked sinuses. The William offers a way to remedy this situation, and with our showroom model in hand, I discovered the highs and lows of William.

What I like about the Stadler Form William Humidifier

The humidity output of the William is one of the most impressive features of this model. Putting out just as much moisture as an evaporative model twice its size, the William by Stadler Form is a powerful tool to keep your home feeling more comfortable. With a daily output capacity of nearly 3.5 gallons, the William is able to combat even some of the most severe dry conditions in your home.

Another great feature of the William is its coverage area. With an open floor plan, the William ultrasonic can help keep spaces up to 100 sq. ft. feeling more comfortable. In addition to the coverage, this model gives you the ability to customize your humidity level. A built-in hygrostat allows you to set the target humidity between 40% and 75%. When it reaches your desired humidity level, it will stop and only kick on again when the humidity level dips below your set point.

In terms of hygiene, the William employs the Ionic Silver Cube, a device that continuously emits silver ions into the tank. This prevents the growth of bacteria and microbes, a common problem with standing water. A demineralization cartridge gives you the ability to use just about any water. Prior to using the William, use the water hardness test strip that can be found taped to the back of the user manual. This will test the hardness of your water and give you a pretty good idea of how often you'll need to change the demineralization cartridge. If you have hard water, simply soak, then install the cartridge to help prevent mineral build up or scale. If you use distilled water, you can use the William without the cartridge. The only exception to this is water that is already softened. While you can use it in this machine with the cartridge removed, you generally want to avoid this, as the sodium in softened water can shorten the lifespan of the William's inner components.

A couple of the other features are also handy. The pre-warm feature helps to kill some types of microbes, adding another layer of hygienic protection. An eight hour timer allows you to set it and forget it, while a sleep mode can dim the display and reduce light that may bother you at night. At night, this is a great humidifier to use as it nearly silent, emitting only a low hum that is quieter than a computer fan or a refrigerator.

What I do not like about the Stadler Form William Humidifier

I wish the warranty was more in line with some of the other Stadler Form/Swizz Style models - two years. Though, at one year, the William's warranty is on par with most other ultrasonic humidifiers available today. My other negatives with this humidifier are the same ones I have with other ultrasonics. The pre-warm feature should NOT be mistaken for what we traditionally think of, in terms of "warm mist". By the time the water exits, it's usually cooled to just a couple degrees higher than your body temperature. Filling the tank isn't as easy as with a top-fill or evaporative model. I know it's a pretty minor inconvenience, but it's one that many are familiar with.

Overall, the Stadler Form William humidifier is on par with some of the best ultrasonic humidifiers available. The features add value by William's ability to humidify is top notch. The complaints I have with this model are generally the same I find with most ultrasonic humidifiers, so in that regard, it is similar to comparable models. The design is nice, particularly if you're a fan of black/smoke with chrome accents. In all the William is a solidly built cool mist humidifier that should help make your home more comfortable in no time at all!

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

Stadler Form William User Manual     Stadler Form William Owners Manual
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Humidifier Buying Guide
Using a Humidifier


1 Year Limited Warranty


Swizz Style William Ultrasonic Humidifier
William Ultrasonic Humidifier (Item#: SM0001) (Discontinued)

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