Molekule's refund policy allows you to request a full refund within 30 days of the shipment date if you are unsatisfied with your purchase. Refurbished units are final sale and not eligible for the 30-day return offer. You must request a return authorization from customer service and return the air purifier in good physical condition with all the original parts included. If the purchase was made from an authorized retailer, you must follow the retailer's policies for returns. It's important to note that purchases for use in healthcare or medical facilities are nonrefundable.