The MRCOOL O-18-HP-WMAH-230C-O Olympus 18K BTU 1.5 Ton 4th Gen Ductless Mini-Split Wall Mounted Air Handler is a high-efficiency indoor unit designed to deliver reliable heating and cooling in ductless HVAC systems. It works by circulating air over the evaporator coil and distributing conditioned air evenly throughout the space when paired with a compatible MRCOOL Olympus outdoor cond... https://www.partshnc.com/mrcool-olympus-4th-gen-air-handlers-o-18-hp-wmah-230c-o