All returns must have prior authorization before returning to our factory. Goods must be returned in unused, resalable condition. Return authorization will not be given on returns requested after 30 days of receipt and must be received by our warehouse no later than 30 days after return authorization is given. A 25% restock fee will apply and customer is responsible for return freight. Any item that is returned in used or damaged condition will be recycled and not credited. Air Cleaning Specialists, Inc. reserves the right to inspect all returned product and issue final determination as to its condition. For items believed to be an error of the factory, please contact our office and we will advise return procedure. To obtain Return Authorization, call our office at (866) 651-9764 or email firstname.lastname@example.org to speak with a return specialist.