This. Humidifier works well. It has permanent wick that is made of expanded metal. The fan motor also runs a small water pump that circulates the water over the wick making it pretty efficient. To keep it running more than a year you must change the water regularly, about every two weeks. This must be done because the minerals build up and tend to corrode the wick because it is expanded aluminum. The one drawback to this humidifier is that water tends to be entrained in the flow through the wick and causes corrosion of the fan motor. The motor is not very accessible to clean and lubricate. So changing the water quite regularly will cut down on the corrosion of the motor. Be sure to keep you receipt and registering for the warranty makes it easier to get a replacement. Check the operation the next season before 1 year is up. Most likely the fan will have frozen due to corrosion. They will readily replace within a year. We've had three of these in the family, either exact or similar model without light or humidistat. All have been replaced Performance Good because of water being pumped over wick. Ease of Cleaning Wick and bottom reservoir can go in dishwasher Durability Rarely got more than two years. Get a replacement within a year.