Air-O-Swiss humidifiers have gained our respect over the years. For a while they were the only manufacturer whose humidifiers did not break down and consequently have enjoyed the highest level of customer satisfaction. Air-O-Swiss has crafted their designs to reduce the production of white dust and control the proliferation of germs and bacteria. We rate the Air-O-Swiss 7142 as our "Category Winner" which is an ultrasonic cool and warm mist humidifier. For a combination humidifier and air purifier, the Air-O-Swiss Air Washer can't be beat. We also offer all Air-O-Swiss humidifier replacement filters and cartridges.