The MRCOOL O-12-HP-WMAH-230C-O Ductless Mini-Split Wall Mounted Air Handler is an indoor HVAC unit designed for use with compatible MRCOOL ductless mini-split heat pump and air conditioning systems. It works by receiving conditioned refrigerant from the outdoor condenser and distributing heated or cooled air evenly throughout the room for reliable year-round comfort. https://www.partshnc.com/mrcool-olympus-4th-gen-air-handler-o-12-hp-wmah-230c-o