The MRCOOL UAH18036-O Universal Series 36K BTU Air Handler is a high-performance indoor HVAC unit designed for compatible split-system air conditioners and heat pumps. It works by circulating conditioned air throughout the building while housing the evaporator coil that transfers heat for efficient cooling and heating. Engineered for residential and light commercial applications, this... https://www.partshnc.com/mrcool-universal-series-36k-air-handler-uah18036-o