Air-O-Swiss 7135 Ultrasonic Humidifier

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AOS 7135 Ultrasonic Digital Humidifier
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Air-O-Swiss 7135 Ultrasonic Humidifiers

The Air-O-Swiss ultrasonic humidifiers use high frequency vibrations to emit a fine mist of water into the room where the mist immediately evaporates. The Air-O-Swiss can be used as a cool mist humidifier during the summer, or as a warm mist humidifier (pre-heated to 104° F) for dry winter air.

**The Air-O-Swiss 7135 humidifier was recently rated the top of its category in home humidifiers. From hygiene and safety to ease of use and coverage area, the AOS 7135 ultrasonic humidifier came in as the recommended model for home humidification.**

If you have allergies, then you should pay close attention to the humidity in your home. When the humidity is too high, allergens like mold and dust mites will multiply, but when the humidity is too low, the air becomes dry and harsh on the sinuses, nose, throat, and skin. The Air-O-Swiss Ultrasonic Humidifier can disperse up to 3.5 gallons of water a day back into your home, and it comes with a built-in hygrostat so that you can monitor the relative humidity level and a humidistat to control the humidity level.

Easy to use and maintain, these humidifiers come with either digital or manual controls and a removable transparent cover. Operation is a breeze with digital controls like an LCD display, timer, automatic mode, sleep mode, and indicators that let you know when it's time to empty or clean the unit. The Air-O-Swiss Ultrasonic Humidifiers are ultra-quiet and do not consume much power. The included Hydro Cell provides constant freshness in these humidifiers. A demineralization cartridge, which should be replaced every three months (or sooner depending on your situation), prevents mineral residues from contaminating the water, and the shell of the cartridge is actually treated with ionic silver to act an an antimicrobial ageint.

AirOSwiss 7135 Humidifier Video

Air-O-Swiss 7135 Humidifier Specifications

  • Main Voltage: 120 V / 60 Hz
  • Power Consumption: 45 W
  • Weight: 7.7 lbs (empty)
  • Size Dimensions: 15" x 8.7" x 13.8"
  • Area Coverage: suitable for rooms up to 650 square feet
  • Humidity Output: up to 3.5 gallons a day
  • Tank Capacity: 1.75 Gal. (6.5 L)
  • Accessories: Hydro Cell and Demineralization cartridge

Air-O-Swiss 7135 Humidifier Product Features

  • Dual Mist Humidifier - ambient temperature vs. 104° F preheated mist
  • Digital Controls with LCD Display
  • AOS 7135 Humidifier ControlsIntelligent Temperature Compensation (ITC, auto humidify feature)
  • Hydro Cell, Ultrasonic Vibrations & Demineralization Cartridge work to capture minerals in the water before they are dispersed into the air, making it one of the most hygienic humidifier available
  • Hygrostat & Mist Output Regulator
  • Sleep Mode
  • 1 - 9 Hr. Timer to allow for Timed Humidification
  • Empty & Cleaning Indicators
  • Durable, titanium coated diaphragm durability and years of use
  • Ultra Quiet
  • 3 year warranty

Product Reviews & Questions

Write A Review | Read all 21 reviews.
  quality, but not versatile
Reviewed by: musician from North Carolina

This is an excellent quality product and should work fine for the home, but for my specific usage an office in a large public building I find myself wishing I could set the humidity to 30% or 35%, but the minimum setting is 40%. So it runs through a whole tank in less than one night. Also, a real timer mechanism that could be set with a clock would help the "timer" here is only for a certain number of hours once you turn it on. So I turn it on in the morning, let it struggle to get the humidity up into the 30s and leave it off at night--I can't refill the thing every day. I'm trying to keep the musical instruments in my office from cracking again!.
  Air-O-Swiss 7135 Humidifier
Reviewed by: Allergy sufferer from Charlotte, NC

We love our Air-O-Swiss 7135 Humidifier - we checked the reviews first and then purchased it. My husband and I have allegies year round. We now don't wake up with dry nasal passages and don't wake up in the middle of the night not being able to breathe due to dry air and no humidity flowing. I would highly recommend it - especially in the south where it can be very dry. Thanks again for providing us with a worthwhile product.
  excellent product
Reviewed by:  from Greenwich, Ct

This humidifier is extremely quiet & works really well. It is heavy to fill with water, but I have my husband do it.

Customer Q & A

Q1: Can I use tap water instead of buying distilled water.
A: Yes. Most people use tap water. If there is little mineral content you can use tap water with or without the demineralization cartridge. If you do have minerals in the water, just make sure to keep up with regular replacement of the cartridge and tap water will work fine. The only time I tell people to generally avoid tap water is if they have softened water. In that case, the sodium that is often added to the water to soften it can shorten the lifespan of the humidifier over the long term. But other than that, tap water is A-ok!

Q2: Does this have any parts that needs to be replaced and how often?
A: There are two replacement parts - the demineralization cartridge and Hydro stick. The Hydro stick is generally replaced annually, and works to keep the water free of bacteria, germs, etc. The Demineralization cartridge needs to be replaced every 2 weeks to 3 months. This all depends on how hard your water is. If you notice any fine white dust, it's time to replace the cartridge. This is the mineral content in your water, not being removed and being dispersed by the humidifier. To avoid this entirely, you can use distilled water and remove the cartridge altogether.

Q3: What's sleep mode on the more expensive model?
A: The Sleep mode in the digital Air-O-Swiss humidifiers models functions like this. 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. After six hours, it will shut off.

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Air O Swiss 7135 Ultrasonic Humidifiers Reviews
Air-O-Swiss 7135 Ultrasonic Humidifier

This Air-O-Swiss ultrasonic humidifier uses high-frequency vibrations to turn the water into a micro-fine mist that creates a comfortable environment in any room. This model provides you a dual option with a water pre-heating function, when the mist exits the Air-O-Swiss 7135 at a pleasant 104° F, as well as a cool mist option where the water exits at ambient temperatures. Intelligent Temperature technology monitors the temperature and automatically adjusts the output when conditions change. These features give this ultrasonic humidifier a range of capabilities that make it truly unique. As the longest running and best selling ultrasonic humidifier made by Air-O-Swiss, the AOS 7135 has proven to be a reliable way to improve indoor comfort and humidify during the dry fall and winter months. Here is how this mainstay compares to other models.

What I like about the Air-O-Swiss 7135 Humidifier

The versatility of this unit has consistently made it one of the best humidifiers available. Even if you generally do not suffer from sinus problems or dryness year round, the warm or cool mist options are great for any time of year. The capacity is large enough that most people will fill it once per day (twice for more severe dry conditions), and the weight & size make it ideal for any room in a house or apartment. The timer mode can be a great additional feature. Set it to run for the full nine hours before you go to sleep at night, and you can spend the evening sleeping in comfort while not having to worry about turning the unit off in the morning.

The digital conveniences and features of this model make it ideal for setting up things just the way you want them. The AIROSWISS 7135 humidifier allows you to choose from warm mist or cool mist. While the warm mist feature isn't hot, it preheats the water just enough that when it comes out of the humidifier, it has been warmed enough that it won't impact the overall room temperature. It also lets you know, via indicator lights, when it needs to be cleaned (descaled) or refilled. The LCD displays provides a real-time, relative humidity reading, and an auto (ITC) and sleep features allow you to set it and forget it for nearly any situation. So you have as much or as little control as you want, and best of all, each feature adds actual value to the humidifier and only enhances its benefits.

I tested this humidifier in my apartment. The air in my apartment is very dry which it makes it difficult to get a good night's sleep. During the winter months, it's not uncommon to wake up with a nose and throat that feels like it's been through a blast furnace. Dry sinuses in the morning or a persistant cough at night can all be symptoms of irritation caused by dry air. For those who heat their home with wood or coal, dry indoor air can be particularly severe. Regardless of your specific situation, the 7135 can help.

Because I am a very light sleep, I usually do not like to use a humidifier in my bedroom, but the 7135 dual mist humidifier is surprisingly quiet. The near silent operation of the fan did not keep me from falling asleep, so aside from a low hum and occasional gurgle of water, this ultrasonic humidifier is extremely quiet.

In terms of hygiene, Air-O-Swiss 7135 humidifier set itself apart from other brands with the combination of three key features: the Hydro Cell, the Ultrasonic Technology, and the Demineralization Cartridge. The demineralization cartridge acts as a filter to prevent any mineral content found in your water from being dispersed into the air. The case of this cartridge is also treated with ionic silver, a natural antimicrobial agent that helps to neutralize microbes and germs. This cartridge also helps keep the tank free of mineral build up that is often found in regular humidifier use. The Hydro Cell is the newest hygiene feature. This small disc contains activated carbon that filters out impurities from the water before they are dispersed throughout your home. Lastly, is the ultrasonic vibrations. The very nature of this technology disrupts the cell walls of any remaining microbes, often killing them instantly. These features all come together to stamp out problems before they start and help to extend the life of this humidifier.

What I do not like about the Air-O-Swiss 7135 Humidifier

There is not much to dislike about this humidifier. It is one of our best sellers and I did not have any problems with it during our product testing. If I had to choose one downside to this model, it would be that you have a cartridge to replace every three months (or less) and a Hydro Cell more frequently. Be it that these two features help keep the Air-O-Swiss 7135 ultrasonic running smoothly and free of bacteria and viruses, the cost to replace these is relatively minor.

In summary, the Air-O-Swiss 7135 humidifier combines simple operation with minimal energy use and unmatched versatility. The improved system helps keep the tank water clean, hygienic and minimizes fine dust that is sometimes left by other brands of ultrasonic humidifiers. The AOS 7135 is nearly silent, and its sleek design minimizes its footprint in your bedroom or living area.

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 7135 Humidifier Users Manual    Air O Swiss 7135 Owner Manual
Air-O-Swiss 7135 Setup Guide    Air-O-Swiss 7135 Setup Guide
Compare Air-O-Swiss Humidifiers
Compare Humidifiers
Humidifier Buying Guide
Humidifiers FAQ
Benefits of Home Humidification
Using a Humidifier


3 Year Limited Warranty


AIROSWISS 7135 Ultrasonic Humidifier
AOS 7135 Ultrasonic Digital Humidifier (Item#: AO0002) (Out of Stock)

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