The MRCOOL M14DSR2436A Signature Series 2–3 Ton Downflow Square-to-Round Adapter Kit is an HVAC duct transition component designed to connect a square downflow air outlet to round ductwork. It installs between compatible HVAC equipment and the duct system, creating a secure and efficient airflow path. Commonly used with 2–3 ton downflow furnaces and air handlers, this adapter helps im... https://www.partshnc.com/mrcool-signature-downflow-adapter-kit-m14dsr2436a