The MRCOOL MCAEAMPEF36C21AA Signature Series 36K BTU Multi-Position Split System Air Handler is a versatile indoor HVAC unit designed to distribute conditioned air efficiently throughout residential and light commercial spaces. It works by circulating heated or cooled air produced by a compatible heat pump or air conditioning condenser through the ductwork, ensuring consistent indoor comfort. Engineered for use with split system HVAC equipment, compatible thermostats, and evaporator coil applications, it offers flexible installation, quiet operation, improved airflow, enhanced energy efficiency, and dependable year-round climate control for lasting performance.