MRCOOL MCAEAWPEF30E21AA Stud Mount Split System Air Handler is an indoor HVAC unit designed to deliver efficient airflow and reliable temperature control in compatible split-system applications. It works by drawing indoor air across the evaporator coil, where heat is absorbed or released, then distributing conditioned air evenly through the ductwork. https://www.partshnc.com/mrcool-signature-series-stud-mount-air-handler-mcaeawpef30e21aa