Ok, so it is recommended that the filters be changed every six months and to use distilled water in the units. Well, after buying them less than a month ago and using them only for one week, in one night's time I became very ill from black mold exposer and am still not well.
Please do not waste your money or risk the health of yourself, loved ones or pets with any type of device that creates a humid environment. Black mold infection can be deadly for those of us with compromised immune systems. I will be in contact shortly with the corporate office if Arctic Air shortly.
Bottom Line: No, I would not recommend this to a friend