The MRCOOL MCAEAMPSF18C21AA Signature Series 18K BTU Split System Multi-Position Air Handler is a versatile indoor HVAC unit designed to provide efficient air distribution for residential heating and cooling systems. It works by circulating air across the evaporator coil, where it is cooled or heated before being delivered through the ductwork. Compatible with MRCOOL split-system air ... https://www.partshnc.com/mrcool-signature-series-multi-position-air-handler-mcaeampsf18c21aa