The Air-O-Swiss Ultrasonic 7144 humidifier is hailed by reviewers for its near-silent performance, excellent moisture output and ability to maintain a steady humidity level. With a large water tank (1.5 gallons), this humidifier can produce 3.5 gallons of moisture per day, more than a gallon more than most other tabletop models. This humidifier can produce warm or cold mist, which can help keep a room toasty in the winter and drop the temperature in a space during warmer weather. It gets high marks for its sleek design, easy-to-read display and excellent moisture output. Some owners complain that the tank is difficult to refill and that the humidistat is inaccurate.
Simple, thoughtful design and user-friendly features: The Air-O-Swiss 7144 humidifier is praised by professionals and consumers alike for its sleek design. The large LCD display is easy to use and see, and a timer allows users to set the moisture output from one to eight hours. This model also includes a hygrostat and output regulator, which consumers say maintain the perfect humidity level in any space. Another bonus? The tank can be filled from the bottom, making it mess-free to fill and clean. It is transparent so users can easily know when the tank needs refilling.
Excellent moisture output and easy to control: The Air-O-Swiss Ultrasonic 7144 is nearly double the cost of typical tabletop model, but reviewers say its solid construction and reliable output make the expense worth it. According to the manufacturer, the Air-O-Swiss 7144 has a 1.5-gallon tank and produces enough humidity for a room of up to 650 square feet, although some user reviews say this is exaggerated. The machine also features a digital humidistat to measure the humidity level in the room, but some reviewers doubt the accuracy of the feature.
Relatively quiet: While the Air-O-Swiss Ultrasonic 7144 is by no means silent, users say it is notably quieter than comparable models. We read few complaints about noise in general.
Sleek and nearly silent, but not easy to fill: User reviews we read for this model were somewhat mixed. Most users like the Air-O-Swiss 7144's quiet operation, adjustable humidity and sleek design, but several say that the tank is difficult to refill. Like other ultrasonic humidifiers, this one may leave white residue on furniture from minerals dissolved in the water; some users recommend using filtered or distilled water to prevent this problem. This model requires a new Air-O-Swiss Hydro Stick (*Est. $30) each year to control microbial growth, along with fresh demineralization cartridges (*Est. $15) every two to three months.
Review Credibility: Very Good Reviewer Michael Lasky gives the Air-O-Swiss 7144 a score of 8 out of 10 in this review. He says the Air-O-Swiss can raise a room's humidity from 39 to 50 percent in less than half an hour (though the size of the room isn't mentioned). Overall, Lasky says it works very well and is "extremely quiet," but refilling the tank "can be messy."
Review: Air-O-Swiss Ultrasonic Humidifier AOS 7144, Michael S. Lasky, March 25, 2009
Review Credibility: Very Good This site has an expert review from Mercia Tapping, president of AllergyBuyersClub.com, and about 20 reviews contributed by visitors to the site. According to the reviewer, the Air-O-Swiss 7144 is almost silent, easy to use and effective, but the digital display tends to fluctuate. Users here also like it; 89 percent say they would recommend it.
Review: Air O Swiss 7144 Ultrasonic Warm Cool Mist Humidifiers, Mercia Tapping, Not Dated
3. Good Housekeeping
Review Credibility: Very Good The Good Housekeeping Research Institute tests 21 humidifiers, including the Air-O-Swiss 7144, which editors describe as a "splurge-worthy pick." However, the discussion of this model lacks substance, and there's little information detailing how the humidifier was tested. Unfortunately, this review is several years old.
Review: Best Humidifiers, Editors of Good Housekeeping magazine, Not dated
Review Credibility: Good About 60 users weigh in on the Air-O-Swiss 7144 at Amazon.com, where it receives an average rating of 3.5 stars (out of 5) from more than 90 users. Most like its quiet operation, attractive design and adjustable humidity level. However, some find the water tank hard to fill, the demineralization cartridge ineffective at controlling white dust and the machine unable to humidify a 650-square-foot space.
Review: Air-O-Swiss AOS 7144 Ultrasonic Humidifier, Contributors to Amazon.com, As of October 2012