Air-O-Swiss Ultrasonic 7135 Review

What reviewers like:
Reviewers favor the Air-O-Swiss Ultrasonic 7135 humidifier for its near-silent operation and sophisticated features such as the built-in hygrometer, LCD readout and antimicrobial silver stick.

What reviewers don't like:
A few owner reviews complain that the Air-O-Swiss humidifier is awkward to refill, can give inaccurate humidity readings and will produce white dust if run with softened water.

Air-O-Swiss Ultrasonic 7135 review highlights

Both professional reviewers and owners praise the Air-O-Swiss Ultrasonic 7135 humidifier for its ultra-quiet operation, solid construction and advanced features. It is rated for room sizes up to 600 square feet. This model produces either warm or cool mist and comes with a hygrometer (which displays humidity level) and digital LCD display that allow users to preset and control the humidity. An ionic silver stick prevents bacteria, and a demineralization cartridge helps minimize white dust, though reviewers note that softened water will produce dust and distilled water may be necessary to eliminate the problem. Some owners also complain that the humidity readings are inaccurate and that the tank is cumbersome to refill. Still, this Air-O-Swiss model leads its class because of its high quality. For smaller rooms, the Germ Guardian H3000 ultrasonic (*est. $180) is a durable model with a humidistat that could be a good alternative.

The most useful review we found for the Air-O-Swiss Ultrasonic 7135 humidifier is a professional evaluation on the Allergy Buyers Club website, which provides a comparative rating as well as short appraisals of its basic features, cleaning needs and parts. There are also detailed lists of the humidifier's features and specifications. About two dozen reviews posted on Amazon.com are the best source of owner feedback we found. Epinions also has a few owner reviews, which tend to back up the views expressed on Amazon.com.

Also see full report: Humidifiers

*In order of credibility (see our Ratings Criteria).

1. Allergy Buyers Club.com
Air-O-Swiss Ultrasonic Humidifiers – Model 7135
Editors of Allergy Buyers Club

The Air-O-Swiss 7135 receives the "Category Winner" recommendation from this retail site, where a professional review gives it the highest possible rating based on its near-silent operation, modern design and high-end features like the built-in hygrometer, LCD controls and antibacterial silver stick.

2. Amazon.com
Air-O-Swiss 7135 Ultrasonic Humidifier
Contributors to Amazon.com

Nearly 80 owners posting here give the Air-O-Swiss 7135 an above-average consensus rating for being quiet, well-built and easy to preset and monitor, though some complain of white dust and a few owners had trouble with leaking.

3. Epinions
Air-O-Swiss 7135 2 Gallon Humidifier Reviews
Contributors to Epinions

A handful of owners give the Air-O-Swiss middling ratings overall, with strengths being its quiet operation and high-quality features and weaknesses its inaccurate humidity readings and, in one case, production of white dust.

Also see full report: Humidifiers

Air-O-Swiss Ultrasonic 7135 Review