The First Company 9-320-871 3-Row Coil is a replacement heat transfer component designed for compatible First Company HVAC equipment. It works by allowing refrigerant or circulating water to transfer heat through its three-row coil construction, supporting efficient heating or cooling performance depending on the system application. Commonly used in compatible air handlers and fan coi... https://www.partshnc.com/9-320-871-first-company-coil-3r-18th-x-12-5lg