The most updated version of this policy can be found on Lowes.com. There are no additional warranties on Iris branded product.
The following is taken from Lowes.com "Customer satisfaction is our goal. If you are not completely satisfied with your purchase, simply return the merchandise to any Lowe's store in the U.S. within 90 days. We, in our discretion, will repair it, replace it, or, based on your method of payment with a valid receipt, refund your money."