VAPIUM® Inc. (“VAPIUM®”) believes strongly in the quality of its products. We guarantee our products to be free of malfunction due to defect in materials or workmanship for a period of two (2)* years from the date of purchase of the "SUMMIT®+" ("SUMMIT PLUS") *requires registration of the unit serial number on the website for the two year warranty. Otherwise a (1y) one year warranty will apply. For the original SUMMIT® the warranty is one year (1y). The warranty does not cover water damage. If such a defect is found, an exchange or repair to the device in question will be issued. We do not offer refunds on used products. All warranted items must have been purchased from our website (www.vapium.com), an authorized distributor, or authorized retail location. In the event that servicing is required due to defect, please contact our support department for information on where to send your unit along with a copy of the sales receipt for warranty service and the unit serial number.