Direct answer: Every unit carries a 12 months warranty from the delivery date, covering the ultrasonic mist disc, pump, LED board and control board. Defective units are replaced free of charge in the next shipment, and spare parts are stocked for five years after a model is discontinued.What is coveredThe 12 months warranty covers the ultrasonic mist disc, pump, LED board and control board — the parts that fail from a defect rather than from use. It runs from the delivery da···