Both professional reviewers and owners praise the Air-O-Swiss Ultrasonic 7135 humidifier for its ultra-quiet operation, good moisture output and advanced features. It outputs up to 3.5 gallons per day and is rated for room sizes up to 650 square feet. This model produces either warm or cool mist and comes with a hygrometer and digital LCD display that allows users to preset and control the humidity. A hydro stick keeps the water fresh, and a demineralization cartridge helps minimize white dust. However, some users find the cartridge ineffective and recommend using distilled water to eliminate the problem. Some owners also complain that the humidity readings are inaccurate, the tank is cumbersome to refill and the humidifier has a tendency to develop leaks. We found somewhat better reviews for the more expensive Air-O-Swiss Ultrasonic 7144 (*Est. $ 200) , which has similar features and a sleek modern design.
The most useful review we found for the Air-O-Swiss Ultrasonic 7135 humidifier comes from ConsumerReports.org, which includes this model in its latest roundup of humidifiers. The humidifier also receives a professional evaluation from AllergyBuyersClub.com, which provides a comparative rating as well as short appraisals of its basic features, cleaning needs and parts. There are about 40 user reviews for the humidifier on this site as well, most of them positive. We found an additional 300-plus comments from users at Amazon.com, Epinions.com and Buzzillions.com.
The editors of ConsumerReports.org have test results on their website for 13 tabletop humidifiers, including the Air-O-Swiss Ultrasonic 7135, and three console models. Each humidifier is rated on its output, ease of use, noise level, energy efficiency and ability to handle hard water. Some user reviews may also be found at this site.
Review: Humidifier Ratings, Editors of ConsumerReports.org
The Air-O-Swiss Ultrasonic 7135 is one of the top-rated humidifiers at this retail site, where a professional review gives it 5 stars out of 5 based on its near-silent operation, modern design and high-end features. The humidifier also earns an overall score of 4.3 stars out of 5 from about 40 users at this site.
Review: Air O Swiss 7135 Ultrasonic Warm Cool Mist Humidifiers, Mercia Tapping and Contributors to AllergyBuyersClub.com
More than 250 owners have rated the Air-O-Swiss Ultrasonic 7135 at Amazon.com, giving it slightly above average ratings overall. Users say the humidifier is quiet, well built and easy to use, but some complain of white dust output, problems with leaks and inaccurate humidity readings.
Review: Air-O-Swiss AOS Ultrasonic Humidifier -- 7135, Contributors to Amazon.com
We found about 25 reviews for the Air-O-Swiss Ultrasonic 7135 at Buzzillions.com, drawn from a variety of retail sites across the web. Users find this humidifier quiet and easy to use, and they like the adjustable settings. However, a few complain that it is hard to clean, hard to fill or poorly constructed.
Review: Air-O-Swiss AOS 7135 Ultrasonic Warm Mist Humidifier, Contributors to Buzzillions.com
The Air-O-Swiss Ultrasonic 7135 gets an overall rating of only 2.4 stars out of 5 from about a dozen users at Epinions.com. Although users agree that it is quiet and easy to use, several complain of poor moisture output, white dust and the ongoing cost of components.
Review: Swiss AOS 7135 1.8 Gallon Humidifier, Contributors to Epinions.com