The MRCOOL DIY-MULTI3-18HP230D-O DIY 5th Gen 18,000 BTU Mini-Split Heat Pump Condenser is an outdoor HVAC unit designed to power compatible MRCOOL DIY multi-zone mini-split systems. It works by circulating refrigerant between the outdoor condenser and connected indoor air handlers to deliver efficient heating and cooling throughout multiple spaces. Ideal for residential applications, ... https://www.partshnc.com/mrcool-diy-5th-generation-multi-zone-mini-split-condenser-diy-multi3-18hp230d-o