The MRCOOL M14HSR2436A Signature Series 2–3 Ton Horizontal Application to Round Adapter Kit is an HVAC installation accessory designed to connect compatible horizontal air handlers to round ductwork. It works by creating a secure transition between the unit’s air outlet and round ducts, ensuring smooth, efficient airflow throughout the distribution system. Commonly used with 2–3 ton M... https://www.partshnc.com/mrcoolr-signature-square-to-round-adapter-m14hsr2436a