If an item has either been incorrectly supplied or is not required, it can be returned within 30 days from purchase as long as it remains unused, in new condition and with all packaging and labels intact. Please notify us in writing within 3 days of the goods being dispatched by emailing reznorsales@nortek.com with the following information: 1) Your order number. 2) Any other correspondence regarding the quote/order. Items no longer required will incur a 25% restocking fee and you'll have to return the goods back to us. Due to high handling costs and risk of damage, it is not possible to return Nor Ray Vac, herringbone materials or warm air flue to be returned for credit. Please visit ourDelivery and Returns page for additional information.