The MRCOOL MCAEAWPEF18D21AA Signature Series 18K BTU Split System Stud Mount Air Handler is an indoor HVAC unit designed for compatible MRCOOL split-system air conditioners and heat pumps. It works with a matching outdoor unit to circulate conditioned air, providing efficient heating and cooling through the duct system. Its stud-mount design allows space-saving installation between wa... https://www.partshnc.com/mrcool-signature-series-stud-mount-air-handler-mcaeawpef18d21aa