90-Day Money Back Guarantee: We back all our products and guarantee their performance 100%. If for any reason you are not completely satisfied with your purchase, please call us so that we may assist you in any way we can. If you wish to return the product, simply return it within 90 days of your receipt of the merchandise for a refund. We will refund your original purchase price, less any initial shipping and handling costs and any manufacturer's restocking fees within 30 days of receipt. Return shipping or any installation charges are not refundable. All returned merchandise must be received in undamaged condition, with all original parts and manuals. All returned products must have a Return Authorization Number or the return shipment may be refused. Email to returns@puritec.com for a Return Authorization number and complete shipping instructions.