The MRCOOL DIYCASSETTE18HP-230D25-O DIY 5th Gen 18K BTU One-Way Ceiling Cassette is an indoor HVAC unit designed to provide efficient heating and cooling in compatible ductless mini-split systems. It works by circulating air across the indoor coil and distributing conditioned air through a one-way ceiling-mounted outlet when paired with a compatible MRCOOL DIY outdoor condenser. Ideal... https://www.partshnc.com/diy-5th-gen-18k-btu-ceiling-cassette-diycassette18hp-230d25-o