MRCOOL DIY-36-HP-WM-230D25-O DIY 5th Gen 36K BTU Single Zone 18 SEER Ductless Heat Pump is a high-efficiency mini-split HVAC system designed to provide year-round heating and cooling for a single zone. It works by transferring heat between indoor and outdoor units using advanced heat pump technology for efficient temperature control. https://www.partshnc.com/mrcool-diy-5th-gen-36k-btu-single-zone-mini-split-bundle-model-diy-36-hp-wm-230d25-o