Product review (2 stars): Life isn't very long
If you have many chemicals in your water this doesn't last very long before the chemicals start drying on the element impeding the absorption of water for evaporation. The biggest issue isn't so much with the filter as it is the design of the unit, We noticed after a couple months of using that there was increased dust in the house. Then it dawned on me that it was coming from the unit due to it actually dispersing vapor into the air as a liquid rather than a gas. Although so fine you would not think an issue but it got to the point in our house that it almost looked foggy and the wife was dusting daily and the dust was right back an hour later, we never had a dust problem before and it was getting into the cabinets also. Then it dawned on me it was the humidifier, we stopped using it and I got an industrial filter unit and ran it for 4 days in the house and it cleared everything up! Just a FYI in case you have noticed excessive dust, one of the biggest clues is the dust is white which is actually the chemicals being dispersed by the vapor and the water evaporates and leaves the chemical floating, probably not good for your lungs either!