It appears to be new open box, but the filter may be used. It may have been a returned item. It powers on, the fan turns, and the digital number shows on the screen. It appears to work fine, but we are unfamiliar with this type of item. Filter has light use. Digital Controls with Auto Humidistat 3-Speed Motor with Quiet Nighttime Setting Automatically Shuts Off When Desired Humidity Level is Reached or When Unit is Empty Check Filter and Water Refill Indicators Easy-Fill Water Bottle It turned on. Seems to work perfectly fine.