We want you to feel comfortable when placing your order – therefore, we promise that we will exchange or replace any vent that, due to an error on our part, does not fit, breaks within 90 days of your receipt, or is otherwise damaged by freight. However, we cannot guarantee a replacement if there is an error in your order specifications which you have previously approved. After you place your order, you will receive an invoice detailing our exact specifications, within 24 hours. If you do not receive this invoice, please contact us. We will assume that the measurements are correct and approved, if we do not hear otherwise within 3 business days. In some cases, we are able to give refunds for our orders. We will not typically grant refunds for custom orders. In the event that we do grant a refund for an order, we will need the vents returned to us in pristine, unmodified condition. We cannot grant refunds of the shipping cost, materials or labor. Depending on the size of your vent, we may charge up to a 10% restocking fee. Please be sure to read your invoice carefully, as our production department builds to the specification on your invoice. You’ll want to look over every detail of your invoice to make sure every measurement is accurate, the wood species, shipping address, etc. We cannot be held responsible for incorrect measurements that were approved.