Looking for custom spiral ductwork in Oklahoma City? At Central Oklahoma Winair, we carry spiral duct in sizes from 4” to 18” in stock and offer fast custom fabrication through local OKC sheet metal partners. Whether you're working on a commercial HVAC install, a residential retrofit, or new construction, we have the ductwork you need - ready when you need it. Serving HVAC contractors throughout Oklahoma City, Edmond, Yukon, Moore, and the greater metro area.