MRCOOL DIY-18-HP-WMAH-230C25 DIY 4th Gen 18K BTU Ductless Mini-Split Air Handler is an indoor HVAC unit designed to provide efficient heating and cooling for compatible ductless mini-split systems. It works by circulating indoor air across the evaporator coil, where heat is absorbed or released, then distributing conditioned air throughout the room. Designed for use with compatible MR... https://www.partshnc.com/mrcool-diy-4th-gen-wall-mount-air-handler-diy-18-hp-wmah-230c25