The MRCOOL MULTI3-18HP230C-O Olympus 4th Gen 18K BTU Multi-Zone Ductless Mini-Split Condenser is an outdoor HVAC unit designed to power compatible multi-zone ductless mini-split indoor air handlers for efficient heating and cooling. It works by circulating refrigerant between the outdoor condenser and connected indoor units, delivering precise temperature control across multiple rooms. https://www.partshnc.com/mrcool-olympus-4th-gen-multi-zone-condenser-multi3-18hp230c-o